updated 09/2010

Series 100 Valves

 Series 100 Valves

Contents

Dorot Series 100 – General 4

Technical Data

Available Models 6

Design Specifications 6

Diaphragm Selection Table 7

Dimensions and Weights 8

Main Components 10

Control Functions

M Manually Controlled Valve 12

EL Solenoid Controlled Valve 13

RC Hydraulic Remote Controlled Valve 14

PR Pressure Reducing Valve 15

PS Pressure Sustaining & Relief Valve 16

DI Pressure Differential Sustaining Valve 17

FR Flow Control Valve 18

FE Excessive Flow Shut-off Valve 19

2
 Series 100 Valves

Contents

FL Modulating Float Controlled Valve 20

FLEL Electric Float Controlled Valve 21

FLDI Differential Float Controlled Valve 22

AL Altitude Pilot Controlled Valve 23

BC Booster Pump Control Valve 24

DW Deep Well (Borehole) Pump Control Valve 25

RE Surge Anticipating Valve 26

QR Quick Pressure-relief Valve 27

TO Two Stage Opening Addition 28

SP Surge Preventing Stepped-Closure Addition 29

EC PLC Controlled Valve 30

DE Deluge Dry-pipe and Pre-action Valves 31

Pilots and Accessories 32

Other Dorot Products 34

Typical Applications 35

3
 Series 100 Valves

General

Dorot Series 100

The direct sealing diaphragm valves were introduced to the
world market for the first time by DOROT CONTROL VALVES
at 1982. This valve is operated by the pressure of the pipeline
and is used for various control applications in water supply, fire
fighting, industrial, sewage and irrigation systems.

The only moving component is a reinforced diaphragm, which:

a. Drip tight seals the liquid passage in the closed valve
b. Allows free passage in the fully open valve with minimal
obstruction to the flow line
c. Throttles the flow passage in the modulating valve, as dictated
by the pressure in the control chamber

The valve can be closed or modulated using the line pressure or

an external separate pressure source that is equal or higher
than the line pressure.
Dorot S-100 valves are made for easy, inline maintenance,
executed also by unskilled personal using basic tools.
There are no shafts, bearings or seals that may corrode and
there is no wear and tear by dirty abrasive water or chemicals.

Features and benefits

• Structural simplicity
• Superb design featuring exceptionally low pressure losses at
high flow rates
• Can be used for regulating from no-flow to maximal flow with
no need for additional throttling devices or by-pass valves
• For natural liquids, sea water and industrial effluents
• A wide selection of materials, coating and diaphragm types
• All valve models fit a wide variety of control applications using
Dorot pilot valves

4
 Series 100 Valves

General

Principle of operation
3-way control system
The main valve is controlled by a manually, electrically or pressure actuated selector that:

1 Introduces the upstream pressure or an external pressure source to the valve’s control chamber, thus pressing the valve diaphragm
from top to a closed position.

2 Openes the valve by relieving the pressure from the control chamber and enabling the internal pressure in the line to push the valve
diaphragm up and creating an unrestricted, full flow passage.

3 Shutes all passages to and from the control chamber, thus keeping the main valve in a fixed position. This position does not exist in
devices used for ON/OFF control applications but is necessary in modulating valves.

1 2 3
1 2 3

2-way control system

A control system that consist of two restrictions:
a. A fixed restriction at the upstream side of the control system (nozzle or needle valve)
b. ON/OFF device (valve, relay or solenoid) or a modulating pilot valve with a larger passage than restriction ‘a’ that is installed at the
downstream side of the control system. The main valve position is affected by the downstream pilot valve ‘b’ in the following ways:

1 When the pilot valve is closed, no water can be vented to the downstream and the main valve is closed by the upstream pressure,
introduced into the valve control chamber through the restriction ‘a’.

2 Opening the valve is enabled when the pilot ‘b’ is fully open and allows the drainage of pressure in the control chamber to the down
stream. At this position the pressure in the control chamber nearly equals that of the downstream.

3 Throttling pilot valve ‘b’ so the flow running through it equals the flow entering through the restriction ‘a’, keeps a fixed volume of
water in the control chamber and the main valve in a fixed position.

Pilot Pilot Pilot

b Pilot
valve Pilot
b valve b Pilot
valve
Needle a b valve Needle a valve Needle a valve
b b
valve a
Needle valve a
Needle valve a
Needle
valve valve valve

1 2 3
1 2 3

5
 Series 100 Valves

Technical Data

Available Models
Pattern

Type 44 45 53 47 87 77 82 84 53A 91 67 94
Connection Threaded Threaded Victaulic® Flanged Flanged Flanged Flanged Threaded Victaulic® Threaded Flanged Threaded
Material Cast Iron Bronze Cast Iron Cast Iron Bronze Ductile Iron Cast Iron Cast Iron Cast Iron Bronze Ductile Iron Ductile Iron
Max. Pressure 16bar / 230psi 25bar / 360psi
mm inch
20 3/4 ● ●
25 1 ● ●
40 11/2 ● ● ● ● ●
50 2 ● ● ● ● ● ● ● ● ● ●
65 21/2 ● ● ●
80 323 ● ● ● ● ● ●
80 3 ● ● ● ● ● ● ● ● ● ●
Available Sizes

100 4 ● ● ● ● ● ● ●
150 6 ● ● ● ● ● ●
200 868 ● ● ●
200 8 ● ● ● ●
250 10 ● ● ● ●
300 12 ● ● ●
350 14 ● ● ●
400 16 ● ●
450 18 ● ●
500 20 ● ●
600 24 ● ●

Design Specifications
Materials Standard Optional * Connections Standard Optional *

Cast Iron, Ductile Iron, Cast Steel, Flanges ISO 2084, 2441, 5752 ANSI B16
Body and Bonnet Bronze Stainless Steel JIS B22
AS 10
Diaphragm Natural Rubber NBR ,EPDM ,Neoprene

Spring SST 302 SST 316

Nuts And Bolts Coated Steel SST Threads F-BSP F-NPT

Coating Polyester Epoxy, Nylon, Rubber Control Bores 1/8”,1/4”,1/2” NPT

* Others Upon Request

Non Standard Bonnets

Throttling Bonnet Position Indicating Bonnet

6
 Series 100 Valves

Technical Data

Diaphragm Selection Table*

Diameter Type No. Pressure Range
mm inch mwc psi
Standard 18 12-160 17-230
20, 25 3
/4”, 1”
Low Pressure 85 5-100 7-140
Standard 13 12-160 17-230
40 11/2”
S. Low Pressure 82 5-50 7-70
Standard 03 15-160 21-230
Low Pressure 02 7-100 10-140
50, 65 2”, 21/2”, 323
S. Low Pressure 12 4-50 6-70
Extreme 60 20-160 28-230
50HP 2”HP High Pressure 69 10-250 15-360
Standard 32 12-160 17-230
80, 100 3”, 4” Low Pressure 05 4-100 6-140
Extreme 61 20-160 28-230
80HP 3”HP High Pressure 70 10-250 15-360
100HP 4”HP High Pressure 71 10-250 15-360
Standard 62 20-160 28-230
150 6”, 868 Low Pressure 09 5-100 7-140
S. Low Pressure 91 2-60 3-85
150HP 6”HP High Pressure 72 10-250 15-360
Standard 36 7-160 10-230
200, 300, 350 8”, 12”, 14” Low Pressure 37 2-100 3-140
Extreme 63 20-160 28-230
200HP 8”HP High Pressure 73 10-250 15-360
Standard 40 7-160 10-230
250 10”
Low Pressure 50 2-100 3-140
250HP, 400HP, 10”HP, 16”HP, High Pressure 78 10-250 15-360
500HP, 600HP 20”HP, 24”HP Low Pressure 92 2-100 3-140

* Standard Diaphragm: Nylon Reinforced Natural Rubber. Optional Materials: Nitrile, EPDM, Neoprene Available Upon Request.
** HP = High Pressure

Pressure Rating
Pressure rating of series 100 valves is body strength, connection standard and diaphragm type.
Pressure rating of valve body of standard models: 16 Bar / 230 psi.
Pressure rating of valve body of high pressure models: 25 Bar / 360 psi.
Connection standard is marked on the identification plate, assembled on the valve body.
Diaphragms operation pressure range is presented at the above table.

7
 Series 100 Valves

Technical Data

Dimensions and Weights

L w
L w
Straight Flow, Threaded Connection
L
L H Weight w

H H
Valve Size D W
Cast Iron Bronze Cast Iron Bronze Cast Iron Bronze

D D
mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs kg lbs

H
20 3
/4 115 417/32 112 413/32 43 111/16 43 111/16 20 25
/32 68 243/64 1 2.2 1 2.2

D
25 1 120 423/32 119 411/16 52 23/64 52 23/64 24 15
/16 68 243/64 1 2.2 1 2.2
40 1 1 /2 170 611/16 149 555/64 93 321/32 86 3 3 /8 33 119/64 93 321/32 2.2 4.9 1.8 4
50 2 188 713/32 184 715/64 115 417/32 101 331/32 42 141/64 112 413/32 3.2 7 2.6 5.7
65 2 1 /2 219 8 5/8 212 811/32 118 441/64 109 49/32 46 113/16 112 413/32 3.6 7.9 3.4 7.5
80LF * 323 225 855/64 221 811/32 126 461/64 116 49/16 54 2 1 /8 112 413/32 4.5 9.9 3.9 8.5
80 3 316 1213/64 316 1213/64 135 55/16 135 55/16 53 25/64 200 7 7 /8 11 24

* LF = Low Flow
L w

H
D
Straight Flow, Grooved Connection (Vic.)
Valve Size L H D W Weight
L w
mm inch mm inch mm inch mm inch mm inch kg lbs
L w
40 11/2 177 631/32 81 33/16 26 11/64 93 321/32 1.8 4
50 2 190 731/64 100 315/16 33 119/64 112 413/32 2.6 5.7 L w

H H
80 323 201 729/32 120 423/32 47 127/64 112 413/32 3 6.6

D D
80LF 3 286 111/4 124 47/8 47 127/64 200 77/8 11 24.3

H
100 4 317 1215/32 133 515/64 60 223/64 194 741/64 12 26.4
D

150 6 392 1527/64 250 927/32 82 37/32 300 1113/16 31 68.3

Angle Flow, Grooved Connection (Vic.)

Valve Size H D W Weight
mm inch mm inch mm inch mm inch kg lbs
80 3 240 97/16 170 611/16 200 7 7/ 8 10.5 23.1
100 4 250 927/32 185 79/32 200 7 7 /8 11.5 25.4
L w

Angle Flow, Threaded Connection w

H

Valve Size H D W Weight w

D

mm inch mm inch mm inch mm inch kg lbs w

40 1 1 /2 110 421/64 75 261/64 93 321/32 1.7 3.7
H H
D D

50 2 136 511/32 90 335/64 112 413/32 2.4 5.3

80LF 323 165 6 1 /2 114 431/64 112 413/32 3.6 7.9
H

80 3 239 913/32 145 545/64 200 7 7/8 10.8 23.8

D

Angle Flow, Flanged Connection w

Valve Size H D W Weight w

mm inch mm inch mm inch mm inch kg lbs w

80 3 278 915/16 174 827/32 200 7 7 /8 18 39.7
H H

100 4 300 1113/16 185 79/32 230 93/64 21 46.3

D D

150 6 380 1461/64 230 93/64 300 1113/16 45 99.2 w

H
D

H
D

8
 Series 100 Valves

Technical Data

Dimensions and Weights

Straight Flow, Flanged Connection - Standard Models 16 Bar / 230 psi
Weight
Valve Size L H D W
Cast Iron Duct. Iron Bronze
mm inch mm inch mm inch mm inch mm inch kg lbs kg lbs kg lbs
50 2 200 77/8 166 617/32 85 311/32 166 617/32 7.2 15.8 7.7 17 8 17.6
80LF 323 200 77 /8 202 761/64 105 4 1/8 200 7 7/ 8 11 24.3 11.8 26
80 3 285 117/32 200 7 7/ 8 105 4 1/8 200 7 7/ 8 17 37.5 18.2 40.1 19 42
100 4 305 12 230 93/64 110 421/64 230 93/64 22 48.5 24 53 24 53
150 6 390 1511/32 314 1223/64 145 545/64 300 1113/16 46 101 49 108 51 112
200LF 868 385 1511/32 350 1325/32 170 611/16 365 143/8 50 110 54 119
200 8 460 187/64 400 153/4 170 611/16 365 143/8 80 176 86 190 89 196
250 10 535 211/16 445 1713/64 205 81/16 440 175/16 117 258 125 276 131 289
300 12 580 2253/64 495 197/16 240 97/16 490 199/32 156 344 167 368 147 324
350 14 580 2253/64 495 197/16 270 105/8 540 211/4 182 401 172 379 180 397

L w L w

L w L w
H

H
H
D

H
D
D

Straight Flow, Flanged Connection - High Pressure Models 25 Bar / 360 psi
Valve Size L H D W Weight
mm inch mm inch mm inch mm inch mm inch kg lbs
50 2 228 831/32 169 621/32 85 311/32 175 657/64 10 22
50TH 2TH 250 927/32 120 423/32 42 121/32 175 657/64 6 13
80 3 310 1213/64 237 921/64 105 41/8 200 77/8 30 66.1
100 4 356 141/64 263 1011/32 120 423/32 260 1015/64 38 83.8
150 6 436 175/32 378 147/8 150 557/64 320 1219/32 75 165.3
200 8 530 2055/64 481 1815/16 180 71/32 400 153/4 123 271
250 10 636 251/32 546 211/2 215 815/32 495 197/16 190 419
400 16 709 2729/32 830 3243/64 310 1213/64 830 3243/64 433 955
450 18 715 285/32 830 3243/64 340 1325/64 830 3243/64 460 1014
500 20 900 357/16 970 383/16 490 199/32 980 3837/64 674 1486
600 24 900 357/16 970 383/16 490 199/32 980 3837/64 696 1534

* TH = Threaded

L w L w

L w L w
H

H
H
D

H
D
D

9
 Series 100 Valves

Technical Data

Hydraulic Performance
mm 20 25 40 50 65 80 80LF 100 150 200LF 200 250 300 350 400 450 500 600
Valve Size
inch 3
/4 1 11/2 2 21/2 323 3 4 6 868 8 10 12 14 16 18 20 24
Max. Flow m 3
/hr 6 10 25 40 40 40 100 160 350 350 620 970 1400 1400 2500 2500 3890 5500
Continuance gpm 26.4 44 110 176 176 176 440 700 1540 1540 2730 4268 6160 6160 11000 11000 17116 24200
Max. Flow m /hr 16 27 68 109 109 109 245 273 955 955 1309 2645 3818 3818 6818 6818 10609 10609
3

Intermittent gpm 72 120 300 480 480 480 1080 1200 4200 4200 5760 11640 16800 16800 30000 30000 46680 46680
m3/hr <1
Minimal Flow
gpm <5
Kv m3/hr @ 1 bar 17 17 64 95 95 95 170 220 600 670 800 1250 1900 1900 2600 2600 4600 4600
Cv gpm @ 1 psi 20 20 75 110 110 110 200 260 700 780 930 1460 2220 2220 3030 3030 5370 5370
Kv* m3/hr @ 1 bar - - - 78 - - 120 200 550 - 800 1300 - - 2600 2600 4600 4600
Cv* gpm @ 1 psi - - - 91 - - 140 230 640 - 930 1520 - - 3030 3030 5370 5370

* High pressure models m3 2

Q[ hr ] Q[gpm] 2
P (Bar) = ( Kv ) P (Psi)= ( Cv )
m3 2 2
Q[ hr ] Q[gpm]
P (Bar) = ( Kv ) P (Psi)= ( Cv )
323
1/2”,

m3 2 2
Q[ hr ] Q[gpm]
( ) ( )

14”
8”

24”
68
1”

Headloss Chart
”

1
P (Bar) = P (Psi)=
1 1/2

psi mwc
2”, 2

6”, 8
3/4”

323

12”,
16”,

20”,
Kv Cv

10”
3”
4”

8”
10
1/2”,

14”
18”

24”
68
1”

”
1 1/2

psi 8mwc
2”, 2

6”, 8
3/4”

12”,
16”,

20”,
10”
10
3”
4”

8”

10
7
9
323

8 9
6
8
1/2”,

7
10
14”
18”

24”
68
1”

69 57 psi mwc
”
1 1/2

2”, 2

6”, 8
3/4”

12”,
16”,

20”,
10”

58 46
3”
4”

8”

10
7 9
46 3 5
8
410
5 7
3 9
23 8
4 6
7
6 5
23 2
5 4

4 3
2 1 10 100 1000 5000 m3/hr
3 2 10 100 1000 10000 gpm
1 10 100 1000 5000 m3/hr
2 10 100 1000 10000 gpm

psi bar 1 10 100 1000 5000 m3/hr

25 10 100 1000 10000 gpm
350
psi bar
300 2025
Cavitation Data
350
250
300 20
15 psi bar
200 25
250 350
15
150 10 Cavitation zone
200 300 20
Upstream Pressure

100
150 10250 Safe zone for
5 Bronze valves
50 15
100 200 Safe operation
5 zone
0
50 150
0 10 1 2 3 4 5 6 7 8 bar
10 20 30 40 50 60 70 80 90 100 110 psi
0100
0 5 1 2 3 4 5 6 7 8 bar
50 10 20 30 40 50 60 70 80 90 100 110 psi

0
0 1 2 3 4 5 6 7 8 bar
10 20 30 40 50 60 70 80 90 100 110 psi

Downstream Pressure

10
 Series 100 Valves

Technical Data

Main Components
Pilot valves for superb Unique Design
regulation at high Creating low
reliability losses at high flow
rates

Internal SST spring: Flexible reinforoed

allows the use of wide diaphragm-no
range of diaphragm bearing, guides or
rubber types internal seals
used

Polymeric coating, UV Wide materials

and corrosion resistant variety

10 8 7 9 6 2 4 5
10 8 7 9 6 2 4 5
1
1

Components 10 8 7 9 6 2 4 5
Component No. Description 3
1 3
1 Body
2 Bonnet
3 Diaphragm
4 Spring
5 Spring Disc
3
6 Bolt
7 Short Bolt
8 Washer
9 Nut
10 Suspension Ring (Hook)

9 8 6 5 4 2 1
9 8 6 5 4 2 1
9 8 6 5 4 2 1
9 8 6 5 4 2 1

3
9 8 6 5 4 2 13
33
9 8 6 5 4 2 31
3

33

11
 Series 100 Valves

Control Functions

M Manually Controlled Valve

4
5

1
Description
The valve is controlled manually by a three port selector
that allows the user to select the closed, opened or remote-
controlled position of the valve. The control is effected Optional Control System Components:
effortlessly and quickly, even under high pressure
conditions 1 Main Valve
2 Self-flushing filter
3 Cock valve*
Features 4 3-way selector valve
• Effortless open/close activation 5 Accelerator relay (optional for valves larger than 150mm/6”)
• Fast response
• Clog-free operation * Optional component
• Can be added as manual over-ride to any other control
function

Purchase Specifications
The valve will be a direct sealing diaphragm type, which
allows inline maintenance. No stem, shaft or guide bearing
will be located within the water passage.
The valve will be activated by the line pressure or by an
external hydraulic or pneumatic pressure.
The valve position will be controlled by a hand operated
selector valve. The valve and the controls will be a Dorot
Series 100 valve or similar in all aspects.

Quick Sizing
• Valve size same as line or one size smaller
• Maximum flow speed for continuous operation 5.5 m/sec
(18 ft/sec)

Design Considerations
• The valve should be suited for the maximal flow and Typical Application
allowed headloss Dorot Manually controlled valve installed in an underground,
• Preferred selection of low pressure diaphragms when flooded pit. Manual activation is enabled from top by the
the valve is expected to stay in open position for long selector valve.
periods

12
 Series 100 Valves

Control Functions

EL Solenoid Controlled Valve

4
5

Description
A 3-way solenoid valve, activated by an electric current or an 1
electric pulse, opens or closes the main valve.
The standard valve is supplied in the “normally closed”
position. The “normally open” position is optional.
Electric activation can be added to other control applications
on request. Optional Control System Components:
1 Main Valve
Features 2 Self-flushing filter

• Low power electric activation 3 Cock valve*

• Fast response 4 3/2 Solenoid valve
• Simple and reliable design 5 Accelerator relay (optional for valves larger than 150mm/6”)
• Can be added as electric over-ride to any other control
function * Optional component

Purchase Specifications
The valve will be hydraulic, direct sealing diaphragm type,
which allows inline maintenance. No stem, shaft or guide
bearing will be located within the water passage. The valve
will be activated by the line pressure or by an external
hydraulic or pneumatic pressure. The valve position will
be controlled by an electric solenoid valve. The valve and
the controls will be a Dorot Series 100 valve or similar in all
aspects.

Quick Sizing
• Valve size same as line or one size smaller
• Maximum flow speed for continuous operation 5.5 m/sec
(18 ft/sec)

Design Considerations
• The valve should be suited for the maximal flow and
allowed headloss
• Prefer selection low pressure diaphragms when the valve Typical Application
is expected to stay in open position for long periods Dorot Solenoid Controlled valve, controlled by a local
• The valve can be opened by the electric command (NC) controller.
or closed by it (NO). The definition refers to the main valve
operation and not the solenoid’s characteristics

13
 Series 100 Valves

Control Functions

RC Hydraulic Remote Controlled Valve

Remote pressure
command

4
5

1
Description
A 3-way relay valve, activated by hydraulic or pneumatic
pressure command, opens or closes the main valve. The
standard valve is supplied in the “normally closed” position. Optional Control System Components:
The “normally open” position is optional. Hydraulic activation
can be added to other control applications on request. 1 Main Valve
2 Self-flushing filter
3 Cock valve*
Features 4 Manual over-ride selector valve*
• Fast response even for long control lines 5 Accelerator relay (other types are optional)
• Simple and reliable design
• Can be added as pressure command over-ride to any * Optional component
other control function

Purchase Specifications
The valve will be hydraulic, direct sealing diaphragm type,
which allows inline maintenance. No stem, shaft or guide
bearing will be located within the water passage. The valve
will be activated by the line pressure or by an external
hydraulic or pneumatic pressure. The valve position will be
controlled by a hydraulic relay. The valve and the controls
will be a Dorot Series 100 valve or similar in all aspects.

Quick Sizing
• Valve size same as line or one size smaller
• Maximum flow speed for continuous operation 5.5 m/sec
(18 ft/sec)

Design Considerations
• The valve should be suited for the maximal flow and
allowed headloss
• Prefer selection low pressure diaphragms when the valve Typical Application
is expected to stay in open position for long periods Dorot Hydraulic Remote Controlled Valve, activated by a
• The valve can be opened by the pressure command (NC) remote pressure command.
or closed by it (NO). The definition refers to the main valve
operation and not the relay’s characteristics

14
 Series 100 Valves

Control Functions

PR Pressure Reducing Valve

2
Description
The valve maintains a preset downstream pressure,
1
regardless of upstream pressure or flow rate fluctuation.
The main valve is controlled by either a 3-way pilot valve
(allowing full opening when upstream pressure drops below
the pressure set-point), or by a 2-way pilot valve (creating a
minimal differential in open position). Optional Control System Components:
1 Main Valve
Features 2 Self-flushing filter

• Accurate, stable control from no-flow to full flow 3 Cock valve*

• Simple and reliable design 4 Manual over-ride selector valve*
• Exceptionally low losses at high flow 5 3-way pilot valve (other types are optional)
• WRAS Approval no. 04251
* Optional component

Purchase Specifications
The valve will be hydraulic, direct sealing diaphragm type,
which allows inline maintenance. No stem, shaft or guide
bearing will be located within the water passage.
The valve will be activated by the line pressure or by an
external hydraulic or pneumatic pressure. The valve will
be operated by a pressure reducing pilot valve to achieve
constant outlet pressure, regardless of upstream pressure
or flow variations. The valve and the controls will be a Dorot
Series 100 valve or similar in all aspects.

Quick Sizing
• Valve size same as line or one size smaller
• Maximum flow speed for continuous operation 5.5 m/sec
(18 ft/sec)

Design Considerations
• The valve should be suited for the maximal flow and
allowed headloss
• In case upstream pressure may drop to the required set Typical Application
pressure, select 3-way control pilot Dorot Pressure Reducing Valve reduces varying supply
• Large pressure differentials may cause cavitation pressure to a stabilized downstream pressure.
damage. Consult Dorot for solutions if such conditions
are expected

15
 Series 100 Valves

Control Functions

PS Pressure Sustaining & Relief Valve

1
Description
The valve maintains upstream pressure, regardless of flow
rate variations. The valve will be in the “closed” position if the
upstream pressure drops below the set-point and will fully Optional Control System Components:
open when the upstream pressure exceeds the set-point.
1 Main Valve
2 Self-flushing filter
Features 3 Cock valve*
4 Manual over-ride selector valve*
• Accurate, stable control from no-flow to full flow
• Simple and reliable design 5 3-way pilot valve (other types are optional)
• Exceptionally low losses at high flow * Optional component

Purchase Specifications
The valve will be hydraulic, direct sealing diaphragm type,
which allows inline maintenance. No stem, shaft or guide
bearing will be located within the water passage. The valve
will be activated by the line pressure or by an external
hydraulic or pneumatic pressure. The valve will be operated
by a pressure sustaining pilot valve to maintain constant
inlet pressure, regardless of flow variations. The valve and
the controls will be a Dorot Series 100 valve or similar in all
aspects.

Quick Sizing
• Valve size same as line or one size smaller
• Maximum flow speed for continuous operation 5.5 m/sec
(18 ft/sec)

Design Considerations
Typical Application
• The valve should be suited for the maximal flow and
Dorot Pressure Relief Valve relieving pump surplus flow from
allowed headloss
the system, thus preventing high pressure at low demand
• Check for possible cavitation conditions and consult Dorot conditions.
in case such conditions are expected

16
 Series 100 Valves

Control Functions

DI Pressure Differential Sustaining Valve

Description
1
The valve maintains a preset pressure differential between
its upstream and downstream sides. The valve can control
booster pump discharge, heating and cooling systems,
bypass configurations, filters and other similar systems. Optional Control System Components:
1 Main Valve
Features 2 Self-flushing filter

• Accurate, stable control from no-flow to full flow 3 Cock valve*

• Simple and reliable design 4 Manual over-ride selector valve*
• Exceptionally low losses at high flow 5 3-way pilot valve (other types are optional)

* Optional component
Purchase Specifications
The valve will be hydraulic, direct sealing diaphragm
type, which allows inline maintenance. No stem, shaft or
guide bearing will be located within the water passage.
The valve will be activated by the line pressure or by an
external hydraulic or pneumatic pressure. The valve will be
operated by a pressure sustaining differential pilot valve so
to maintain a minimal pressure differential, regardless of
flow variations.
The valve and the controls will be a Dorot Series 100 valve
or similar in all aspects.

Quick Sizing
• Valve size same as line or one size smaller
• Maximum flow speed for continuous operation 5.5 m/sec
(18 ft/sec)

Design Considerations
• The valve should be suited for the maximal flow and
allowed headloss
• Check for possible cavitation conditions and consult Dorot Typical Application
in case such conditions are expected Dorot Pressure Differential Sustaining Valve controls the flow
• The connection points of the sensing tubes must at the discharge of a booster pump whose suction pressure
be selected in locations free of turbulence and local varies.
interferences

17
 Series 100 Valves

Control Functions

FR Flow Control Valve

2 6

Description
The valve limits the flow rate in the network to a preset ,
value regardless of upstream pressure variations. Optional Control System Components:
The valve fully opens when the flow rate drops below the
set point. 1 Main Valve
2 Self-flushing filter
3 Cock valve*
Features 4 Manual over-ride selector valve*
• Accurate, stable control 5 3-way differential pilot valve (other types are optional)
• Simple and reliable design 6 Orifice plate
• Low losses when the demand is lower than the set flow
* Optional component

Purchase Specifications
The valve will be hydraulic, direct sealing diaphragm type,
which allows inline maintenance. No stem, shaft or guide
bearing will be located within the water passage.
The valve will be activated by the line pressure or by an
external hydraulic or pneumatic pressure. The valve will
be operated by a pressure reducing differential pilot valve
for controlling the flow through the main valve, regardless
of pressure variations. The valve and the controls will be a
Dorot Series 100 valve or similar in all aspects.

Quick Sizing
• Valve size same as line or one size smaller
• Maximum flow speed for continuous operation 5.5 m/sec
(18 ft/sec)

Design Considerations
• A 1/2“ pressure sensing port should be provided, upstream
of the valve Typical Application
• Check for possible cavitation conditions and consult Dorot Dorot Flow Control Valve limits the flow to a specific
in case such conditions are expected customer.
• An additional pressure loss of about 2.5 mwc is created
by the orifice plate (at the set flow)

18
 Series 100 Valves

Control Functions

FE Excessive Flow Shut-off Valve

3
4
3

2 6

Description 1

The valve closes drip tight when the flow rate exceeds the
normal value (due to pipe rupture).
The valve will manually re-set open after fixing the break. Optional Control System Components:
1 Main Valve
Features 2 Self-flushing filter

• Hydraulic burst protection.No electronic controllers are

3 Cock valve*
used 4 Manual over-ride selector valve*
• Simple and reliable design 5 3-way differential pilot valve (other types are optional)
• Low losses 6 Orifice plate

* Optional component
Purchase Specifications
The valve will be hydraulic, direct sealing diaphragm type,
which allows inline maintenance. No stem, shaft or guide
bearing will be located within the water passage.
The valve will be activated by the line pressure or by an
external hydraulic or pneumatic pressure. The valve will be
operated by a pressure reducing differential pilot valve for
closing when the flow through the main valve exceeds the
safe level, regardless of pressure variations. The valve and
the controls will be a Dorot Series 100 valve or similar in all
aspects.

Quick Sizing
• Valve size same as line or one size smaller
• Maximum flow speed for continuous operation 5.5 m/sec
(18 ft/sec)

Design Considerations
• A 1/2” pressure sensing port should be provided, upstream
of the valve Typical Application
• The valve is adjusted to close when the flow rate exceeds Dorot excessive flow shutoff valve installed to prevent flood
the maximal design flow by 10%-20% damages caused by pipe rupture.
• An additional pressure loss of about 2 mwc is created by
the orifice plate (at the normal flow)

19
 Series 100 Valves

Control Functions

FL Modulating Float Controlled Valve

5
4

Description 1
The main valve is controlled by a float valve, located in the
tank or reservoir and set at the required maximum water
level. The valve maintains the maximum level continuously. Optional Control System Components:
1 Main Valve
Features 2 Self-flushing filter

• Accurate and repeatable level control 3 Cock valve*

• Simple and reliable design 4 Needle valve
• Easy installation and maintenance 5 Modulating float pilot valve
• Adjusts the inlet flow to the reservoir’s outlet flow
• WRAS Approval no. 0009092 * Optional component

Purchase Specifications
The valve will be hydraulic, direct sealing diaphragm type,
which allows inline maintenance. No stem, shaft or guide
bearing will be located within the water passage.
The valve will be activated by the line pressure and be
operated by a modulating, 2-way float activated pilot valve.
The valve and the controls will be a Dorot Series 100 valve
or similar in all aspects.

Quick Sizing
• Valve size same as the fill line or one size smaller
• Maximum flow speed for continuous operation 5.5 m/sec
(18 ft/sec)

Design Considerations
• The valve should be suited for the maximal flow
• Upstream pressure at closed position should be at least
10m (15psi) higher than the hydrostatic water pressure at
the downstream Typical Application
• Large pressure differentials may cause cavitation damage. Dorot Modulating Float Controlled valve prevents tank
Consult Dorot for solutions if such cases are expected overflow.
• Prefer use of differential level control in case excessive
noise should be avoided (residential areas)

20
 Series 100 Valves

Control Functions

FLEL Electric Float Controlled Valve

4
5

1
Description
An electric sensor float, located in the tank/reservoir, sends
a command to a solenoid controlled valve. The main valve
will fully open when the solenoid activated and will close
drip tight when the solenoid de-energized, thus enabling Optional Control System Components:
accurate and reliable differential level control.
Optional Addition: Stepped Surge-Preventing Closure. 1 Main Valve
2 Self-flushing filter
3 Cock valve*
Features 4 3/2 Solenoid valve
• Accurate and repeatable differential level control 5 Accelerator relay (optional for valves larger than 150mm/6”)
• Low power electric activation 6 Electric float switch
• Fast response
• Simple and reliable design * Optional component
• Easy installation and maintenance

Purchase Specifications
The valve will be hydraulic, direct sealing diaphragm type,
which allows inline maintenance. No stem, shaft or guide
bearing will be located within the water passage.
The valve will be activated by the line pressure or by an
external hydraulic or pneumatic pressure. The valve position
will be controlled by an electric solenoid valve activated from
a float in the tank/reservoir. The valve and the controls will
be a Dorot Series 100 valve or similar in all aspects.

Quick Sizing
• Valve size same as line or one size smaller
• Maximum flow speed for continuous operation 5.5 m/sec
(18 ft/sec)

Design Considerations
• The valve should be suited for the maximal flow and Typical Application
allowed headloss Dorot Electric Float Controlled Valve controlling the water
• The valve can be opened by the electric command (NC) volume in a tank.
or closed by it (NO). The definition refers to the main valve
operation and not to the solenoid’s characteristics

21
 Series 100 Valves

Control Functions

FLDI Differential Float Controlled Valve

4
6
5

Description
1
A float valve controls the main valve, closing it when the
water reaches maximum level, and opening it when the water
drops to its preset minimum level. The differential between
the maximum and the minimum levels is adjustable.
Optional Addition: Stepped Surge-Preventing Closure. Optional Control System Components:
1 Main Valve
Features 2 Self-flushing filter

• Accurate and repeatable differential level control 3 Cock valve*

• Adjustable differential 4 Manual over-ride selector valve*
• Fast response 5 Accelerator relay (optional for valves larger than 150mm/6”)
• Simple and reliable design 6 4-way differential pilot valve (other types are optional)
• Easy installation and maintenance
* Optional component

Purchase Specifications
The valve will be hydraulic, direct sealing diaphragm type,
which allows inline maintenance. No stem, shaft or guide
bearing will be located within the water passage.
The valve will be activated by the line pressure or by an
external hydraulic pressure. The valve position will be
controlled by a 4-way float pilot located at the top of the tank/
reservoir. The valve and the controls will be a Dorot Series
100 valve or similar in all aspects.

Quick Sizing
• Valve size same as line or one size smaller
• Maximum flow speed for continuous operation 5.5 m/sec
(18 ft/sec)

Design Considerations
• The valve should be suited for the maximal flow
• Upstream pressure at closed position should be at least
10m (15psi) higher than the static water pressure at the Typical Application
downstream Dorot Differential Float Pilot Controlled Valve controlling the
• Fast stream and waves may cause mechanical damage water volume in a filling or emptying tank.
to the float levers. It is advisable to install the pilot in a still
part of the reservoir

22
 Series 100 Valves

Control Functions

AL Altitude Pilot Controlled Valve

Tank/Reservior 5
connection

Description
The main valve is controlled by a highly sensitive pilot, 1
located outside the tank. The pilot opens or closes the valve
in response to the static pressure of the water.
The pilot allows for differential adjustments between the
maximum and minimum level. Optional Addition: Stepped Optional Control System Components:
Surge-Preventing Closure.
1 Main Valve
2 Self-flushing filter
Features 3 Cock valve*
• Accurate and repeatable differential level control 4 Manual over-ride selector valve*
• Fast response 5 High sensitivity altitude control pilot valve
• Easy access - no float is located in the tank/reservoir
• Simple and reliable design * Optional component
• Easy installation and maintenance

Purchase Specifications
The valve will be hydraulic, direct sealing diaphragm type,
which allows inline maintenance. No stem, shaft or guide
bearing will be located within the water passage.
The valve will be activated by the line pressure or by an
external hydraulic or pneumatic pressure. The valve position
will be controlled by a hydrostatic pressure sensing pilot
valve. The valve and the controls will be a Dorot Series 100
valve or similar in all aspects.

Quick Sizing
• Valve size same as line or one size smaller
• Maximum flow speed for continuous operation 5.5 m/sec
(18 ft/sec)

Design Considerations
• The valve should be suited for the maximal flow
• The pilot valve must be located at least 2 meters below Typical Application
the closing level in the tank Dorot Altitude Pilot Controlled Valve controlling the water
• When water-hammer/surge expected during closure - add volume in an elevated tank.
stepped surge preventing closure function to the altitude
control pilot

23
 Series 100 Valves

Control Functions

BC Booster Pump Control Valve

6
4 8
5
7 7

3 3

2 2

Description
The valve eliminates damaging surges caused by pump 1
start-up and shut-off. The electrically activated valve
gradually opens on pump start up, and slowly closes before
the pump is switched off. The valve will automatically close
Optional Control System Components:
drip tight in case of power failure. Optional Additions: Flow
1 Main Valve
Rate Limitation, Extended Closure, Two Stage Operating,
Pressure Reducing and Pressure Sustaining. 2 Self-flushing filter
3 Cock valve*
4 3/2 Solenoid valve
Features 5 Accelerator relay (optional for valves larger than 150mm/6”)
• No slam operation 6 Open/close speed adjustment needle valve
• Exceptionally low losses at high flow conditions 7 Check valve
• Simple and reliable design 8 Limit switch assembly
• Easy installation and maintenance
* Optional component

Purchase Specifications
The valve will be hydraulic, direct sealing diaphragm type,
which allows inline maintenance. No stem, shaft or guide
bearing will be located within the water passage. The valve
will be activated by the line pressure or by an external
hydraulic or pneumatic pressure. The valve position will be
controlled by an electric solenoid valve with adjustable open
close speed control valves. The valve and the controls will
be a Dorot Series 100 valve or similar in all aspects.

Quick Sizing
• Valve size same as line or one size smaller
• Maximum flow speed for continuous operation 5.5 m/sec
(18 ft/sec)

Design Considerations
• The valve should be suited for the maximal flow
• Closure time is related to the pipe length and should be Typical Application
extended for longer pipe Dorot Booster Pump Control Valve preventing surges caused
• For power failure situations, add a fast reacting checkvalve by pump startup and shutoff and drainage of main pipe.
in series and a surge anticipating valve to relief possible
surges

24
 Series 100 Valves

Control Functions

DW Deep Well (Borehole) Pump Control Valve

7 6
8
4
5

2
Description
The valve eliminates surges caused by the start-up and
shut-off of vertical or submersible pumps. It is a relief valve, 1
assembled on a T-junction of the main pipeline. When the
pump starts, the valve slowly closes, gradually increasing
network pressure. Before pump shut-off, the valve slowly
Optional Control System Components:
opens, gradually reducing network pressure.
1 Main Valve
2 Self-flushing filter
Features 3 Cock valve*
4 3/2 Solenoid valve
• No slam operation
• Simple and reliable design 5 Accelerator relay (optional for valves larger than 150mm/6”)
• Easy installation and maintenance 6 Open/close speed adjustment needle valve
• Low Resistance and high flow capacity 7 Check valve
8 Limit switch assembly

Purchase Specifications * Optional component

The valve will be hydraulic, direct sealing diaphragm type,
which allows inline maintenance. No stem, shaft or guide
bearing will be located within the water passage. The valve
will be activated by the line pressure or by an external
hydraulic or pneumatic pressure. The valve position will be
controlled by an electric solenoid valve with adjustable open/
close speed control valves. The valve and the controls will
be a Dorot Series 100 valve or similar in all aspects.

Quick Sizing
• The valve should be sized to match the well flow at
5 mwc/8 psi in the valve site (pump head water table
depth):
D[mm] ≥ 170 x √Flow [m3/hr]
D[inch] ≥ 0.55 x √Flow [gpm]

Design Considerations
• The valve should be suited for the maximal flow
• Closure time is related to the pipe length and should be Typical Application
extended for longer pipe Dorot Deep Well Pump Control Valve preventing surges
• For power failure situations, add a fast reacting checkvalve caused by pump start-up or shut-off.
in series and a surge anticipating valve to relief possible
surges

25
 Series 100 Valves

Control Functions

RE Surge Anticipating Valve

3 7
4

6
3
5
6

Description
1
The valve protects the pumping system from water hammer,
caused by sudden pump shut-off (case of power failure, for
example). The valve is assembled on a T-junction of the main
pipeline, instantly opens when the pump stops, relieving
the returning high pressure wave. The valve slowly closes Optional Control System Components:
once the pressure returns to the static level. The valve also
functions as a pressure relief valve. 1 Main Valve
2 Self-flushing filter
Features 3 Cock valve*

• No slam operation 4 Low-pressure relief pilot valve

• Simple and reliable design 5 High-pressure relief pilot valve
• Easy installation and maintenance 6 Needle valve
• Low Resistance and high flow capacity 7 Pressure gauge
• Protection for sewage as well as clean water pumping
systems * Optional component

Purchase Specifications
The valve will be hydraulic, direct sealing diaphragm type,
which allows inline maintenance. No stem, shaft or guide
bearing will be located within the water passage. The valve
will be activated by the line pressure or by an external
hydraulic or pneumatic pressure. The valve will be operated
by pressure relief pilot valve for opening at a low pressure set
point and another pilot for pressure relief at a high pressure
set-point. The valve and the controls will be a Dorot Series
100 valve or similar in all aspects.

Quick Sizing
• The valve should be sized to match the 80% of the normal
flow at static head in the valve site:
D[mm] ≤ √(250 x Flow[m3/hr] / √Pressure[mwc])
D[inch] ≤ √(0.109 x Flow[gpm] / √Pressure[psi])

Design Considerations
• Install a manual separation/throttling valve, upstream of
the valve position Typical Application
• Closure time is related to the pipe length and should be Dorot Surge Anticipating Valve prevents water-hammer
extended for longer pipe surges caused by an un-expected pump shut-off.
• The valve sensor tube must be connected to the main
line

26
 Series 100 Valves

Control Functions

QR Quick Pressure-relief Valve

1
Description
The valve opens instantly when the pressure in the pipeline
exceeds the safe level, thus relieving excessive pressure
from the network. When the pressure returns to normal, the
valve closes slowly, at an adjustable pace.

Optional Control System Components:

Features 1 Main Valve
• No slam operation 2 Self-flushing filter
• Simple and reliable design
• Easy installation and maintenance 3 Cock valve*
• Low Resistance and high flow capacity 4 Pressure relief pilot valve
• Protection for sewage as well as clean water pumping 5 Needle valve
systems
* Optional component

Purchase Specifications
The valve will be hydraulic, direct sealing diaphragm type,
which allows inline maintenance. No stem, shaft or guide
bearing will be located within the water passage. The valve
will be activated by the line pressure or by an external
hydraulic or pneumatic pressure. The valve will be operated
by a pressure relief pilot valve for fast opening at a high
pressure set-point. The valve and the controls will be a Dorot
Series 100 valve or similar in all aspects.

Quick Sizing
• The valve should be sized to match the expected relief
flow at the set opening pressure:
D[mm] ≤ √(250 x Flow[m3/hr] / √Pressure[mwc])
D[inch] ≤ √(0.109 x Flow[gpm] / √Pressure[psi])

Design Considerations
• Install a manual separation valve, upstream of the valve
position
• Closure time is related to the pipe length and should be Typical Application
extended for longer pipe Dorot Quick Pressure-relief Valve protects a system against
• The valve opens instantly at the set pressure. For pressure surges caused by pump start-up or valves closure.
regulating the system pressure use a Pressure Sustaining
Relief Valve and not a Quick Relief valve

27
 Series 100 Valves

Control Functions

TO Two Stage Opening Addition

4

Description 1

The device can be added to any control function and will

prevent damage caused by too fast filling of a drained
pipeline. The flow rate will be restricted, until the network, Optional Control System Components:
downstream of the valve is full and than a full opening of the
valve is enabled. Please consult DOROT for more details. 1 Main Valve
2 Self-flushing filter
3 Cock valve*
Features 4 Pilot valve
• Can be added to any pipe-filling control function 5 3-way selector valve*
• User adjusted filling pace
• Completely hydraulic – no electronic controllers, batteries * Optional component
or relays are used
• Simple and reliable design

Purchase Specifications
The valve will be hydraulic, direct sealing diaphragm type,
which allows inline maintenance. No stem, shaft or guide
bearing will be located within the water passage.
The valve will be activated by the line pressure or by an
external hydraulic or pneumatic pressure. The valve’s
opening will be restricted by a two-stage opening control
that limits the filling flow until the downstream system is full.
The valve and the controls will be a Dorot Series 100 valve
or similar in all aspects.

Quick Sizing
• Valve size same as line or one size smaller
• Maximum flow speed for continuous operation 5.5 m/sec
(18 ft/sec)

Design Considerations Typical Application

• The valve should be suited for the maximal flow and Dorot two-stage function prevents water-hammer/surges
allowed headloss caused by fast drained pipe filling.
• Prefer selection low pressure diaphragms when the valve
is expected to stay in open position for long periods

28
 Series 100 Valves

Control Functions

SP Surge Preventing Stepped-Closure Addition

Description
The device can be added to any control function and
automatically adjusts the closing speed of a valve that
is located at the end of a long pipeline. This ensures a
moderate flow change pace that prevents pressure surges
from evolving. Please consult DOROT for more details Optional Control System Components:
1 Main Valve
Features 2 Self-flushing filter

• Can be added to any fast closing control function 3 Cock valve*

• Automatically self-adjusted closing pace 4 Stepped closure adjusting pilot valve
• Completely hydraulic – no electronic controllers, batteries 5 3-way selector valve*
or relays are used
• Simple and reliable design * Optional component

Purchase Specifications
The valve will be hydraulic, direct sealing diaphragm type,
which allows inline maintenance. No stem, shaft or guide
bearing will be located within the water passage.
The valve will be activated by the line pressure or by an
external hydraulic or pneumatic pressure. The valve’s closure
pace will be controlled by a stepped closure control pilot that
stops the closing procedure whenever surge waterhammer
conditions evolve. The valve and the controls will be a Dorot
Series 100 valve or similar in all aspects.

Quick Sizing
• Valve size same as line or one size smaller
• Maximum flow speed for continuous operation 5.5 m/sec
(18 ft/sec)

Design Considerations
• The valve should be suited for the maximal flow and
allowed headloss Typical Application
• Prefer selection low pressure diaphragms when the valve Dorot stepped closure function prevents water-hammer
is expected to stay in open position for long periods surges caused by fast closing level control valve.
• Should be used whenever the supply pipe is longer than 2
km/ 1.2 mile and the flow speed exceeds 1.5 m/sec

29
 Series 100 Valves

Control Functions

EC PLC Controlled Valve

4 4

Description
1
The valve is controlled by a PLC controller that enables
local or remote control of various functions such as, time
related operation, the batching of liquid, and conditional
(automatically modified) control parameters, in various
applications. A recommended option is using the Dorot Optional Control System Components:
“ConDor” controller that enables the selection from a
vast range of pre-programmed control functions and their 1 Main Valve
combinations. 2 Self-flushing filter
3 Cock valve*
Features 4 2/2, NC solenoid valve

• Can perform any control function 5 3-way selector valve*

• Highly accurate and reliable electronic control
• Low power actuation * Optional component
• Simple and reliable design
• Controlled by Dorot ConDor valve controller or by a third
party controller

Purchase Specifications
The valve will be hydraulic, direct sealing diaphragm type,
which allows inline maintenance. No stem, shaft or guide
bearing will be located within the water passage. The valve
will be activated by the line pressure or by an external
hydraulic or pneumatic pressure. The valve position will be
determined by a set of two solenoid valves controlled by a
PLC controller. The valve and the controls will be a Dorot
Series 100 valve or similar in all aspects.

Quick Sizing
• Valve size same as line or one size smaller
• Maximum flow speed for continuous operation 5.5 m/sec
(18 ft/sec)

Design Considerations
• The valve should be suited for the maximal flow and Typical Application
allowed headloss Dorot PLC Controlled Valve adjusts the flow rate following a
• Solenoid wiring diameter should be selected so that set-point signal sent from a remote center.
the activation voltage - losses will equal the rated value
±10%

30
 Series 100 Valves

Control Functions

DE Deluge Dry-pipe and Pre-action Valves

3 4

Description
The valve prevents flow of water into fire extinguishing
sprinklers system until it is activated by the activation Optional Control System Components:
devices. Different valve and control system configurations
are available to meet the customer and relevant standards 1 Main Valve
demands. Please check Dorot Fire-Fighting publications for 2 Self-flushing filter
further information. 3 Manual activation valve
4 Solenoid activation*

Features 5 Pilot activation (by detection line)*

6 Drain valve
• Fast opening
• Simple and reliable design * Optional component
• Automatic reset
• Wide range of applications
• UL Approval no. VLFT EX.6543

Purchase Specifications
The valve will be hydraulic, direct sealing diaphragm type,
which allows inline maintenance. No stem, shaft or guide
bearing will be located with in the water passage.
The valve will be activated by the line pressure or by an
external hydraulic or pneumatic pressure. The valve and
the controls will be a Dorot Series 100 valve or similar in
all aspects.

Quick Sizing
• Valve size same as line or one size smaller
• Maximum flow speed for intermittent operation 8 m/sec
(26 ft/sec)

Design Considerations Typical Application

• The valve should be suited for the maximal flow and Dorot valve, activated by a splinker detection line.
allowed headloss
• Check Dorot catalogue for Fire Fighting Valves for more
information with regards to valve and applications types

31
 Series 100 Valves

Pilots and Accessories

Plastic Mini Pilots

For valve sizes 20mm to 100mm - 3/4” to 4”
Pressure rating: 10 bar / 145 psi
29-100 3-way pressure reducing pilot valve
3-way multi purpose
29-200
(pressure reducing and sustaining) pilot valve
3 way differential multi purpose
29-300
(flow control, differential pressure sustaining) 29-100 29-200 29-300

Metal Mini Pilots

For valve sizes 20mm to 150mm - 3/4” to 6”
Pressure rating: 25 bar / 360 psi
68-410 2-way pressure reducing pilot valve
68-500 2-way pressure sustaining pilot valve
3-way (pressure rating 16bar / 230psi) pressure
68-220
reducing pilot valve
31-10 3-way multi purpose (pressure reducing and sustaining,
R/F/S flow-control) pilot valve 68-410 68-500 68-220 31-10R 31-10F

Metal Pilots
For valve sizes 40mm to 600mm - 11/2” to 24”
Pressure rating: 25 bar / 360 psi
2-way pressure reducing pilot valve (CXRS - remote
CXPR
sensing, CXRD differential pressure reducing)
2-way pressure sustaining pilot valve
CXPS
(CXSD differential pressure sustaining)
3-way multi purpose (pressure reducing and sustaining)
31-310
pilot valve
3 way differential multi purpose
76-200
(flow control, differential pressure sustaining)
68-710 2-way pressure sustaining pilot valve CXPR CXPS 31-310 76-200 68-710

High Sensitivity Metal Pilots

For valve sizes 40mm to 600mm - 11/2” to 24”
Pressure rating: 25 bar / 360 psi
3 way differential multi purpose (flow control, altitude
70-110 control and differential pressure sustaining) with
adjustable differential
2-way differential pressure reducing mini pilot valve
70-410
(flow control and altitude control)
31-10H 3-way pressure reducing and differential control 70-110 70-410 31-10H

Float Pilots
For valve sizes 40mm to 600mm - 1 1/2” to 24”
Pressure rating: 25 bar / 360 psi
70-300
70-200 Electric float
70-550 Vertical, differential, 3 and 4-way metal float pilot
Modulating, 2-way plastic float pilot for irrigation use 70-400
70-300
(pressure rating: 8 bar / 115 psi)
70-400 Modulating, 2-way metal float pilot
70-610 Horizontal, differential, 3-way metal float pilot 70-200 70-550 70-610

32
 Series 100 Valves

Pilots and Accessories

Plastic Relays
For valve sizes 20mm to 150mm - 3/4” to 6”
Pressure rating: 10 bar / 145 psi
25-300 3-way / 2 positions NO w. 3/8" ports hydraulic relay
‘Galit’ 3-way / 2 positions NC or NO, small hydraulic relay 25-300 ‘Galit’

Metal Relays
For valve sizes 40mm to 600mm - 11/2” to 24”
Pressure rating: 25 bar / 360 psi
66-210 3-way / 2 positions NO (66-213: NC) hydraulic relay
66-300 3-way adjustable hydraulic relay
28-200 2-way / 2 positions hydraulic relay
28-300 3-way / 2 positions hydraulic relay 66-210 66-310 28-200 28-300

Mini Solenoids
For irrigation valve sizes 20mm to 150mm - 3/4” to 6”
Pressure rating: 10 bar / 145 psi
Operating Voltage:
AC: 24V
DC: 12V or 24V
Latch 7.5-30V
D2 2-way NC solenoid valve
D3 3-way NC or NO solenoid valve D2 D3

Heavy-duty Solenoids
For valve sizes 20mm to 600mm - 3/4” to 24”
Pressure rating: According to the selected orifice and solenoid
type
Operating Voltage (others available upon request):
AC: 24V, 110V or 220V
DC: 12V or 24V
Latch 9V, 12V, 24V
B2 2-way NC or NO solenoid valve
B3 3-way NC or NO solenoid valve B2 B3

Control Filters
Self-Flushing, Inline - Stainless steel screen filter, located within
the main valve, and rinsed continuously by the stream
Sizes: 1/4”, 1/2”
External, “Y” type - Stainless steel screen installed in a “Y”
shaped body on the pressure source.
Sizes: 3/8”, 1/2”
External, large - A large volume external filter “Y” Filter Self-Flushing Filter

33
 Series 100 Valves

Other Dorot Products

Automatic Control Valves

Series 300 - Disc seal, Globe type valve. Glass Reinforced Nylon Valves - Diaphragm
Very accurate regulations at near zero flow sealing valves made of reinforced Polyamide
conditions. Minimum head-loss while fully open. used in Greenhouses, Field Crops, Irrigation,
Available in sizes: 1.5” (40mm) - 32” (800mm). Landscaping, Water Treatment (non corrosive).
Available in sizes: 3/4” (20mm) - 3” (80mm).

Series 500 - Disc seal, Y type valve. This valve Back Flushing Valves - Specially designed
is compact, partially made of new composite valves for back flow flushing of filtration systems.
materials. Wide range of flow and pressure Available in Cast Iron or Glass Reinforced Nylon,
regulation. Single or Double chamber operation.
Available in sizes: 1.5” (40mm) - 8” (200mm). Available in sizes: 2” (50mm) - 4” (100mm).

uPVC Valves - Diaphragm sealing valves made

of uPVC. For use with aggressive water and
with underground (PVC) piping.
Available in sizes: 3” (80mm) - 6” (150mm).

Manual Valves Air Release Valves

Butterfly Valves - Soft sealing Non Metal Air Release Valves -
valves (Wafer type) with options Kinetic, Automatic and Combination Air Release
of gear, lever (or other) operation. Valves made of Polypropylene materials.
Available in sizes: Available in sizes: 1/2” (12mm) - 2” (50mm).
2” (50mm) - 24” (600mm).

Ductile Iron Air Release Valves -

Kinetic, Combination and Sewage Air Release
Non Return Valves - Valves made of ductile iron. Option for surge
Swing check valves, tilting arrestor feature. Available in sizes:
disc check valves, double flap 2” (50mm) - 12” (300mm).
check valves.

Water Meters
Gate Valves - Water Meters -
Valves with soft and Multi-Jet, Single-Jet, Irrigation Meters (pelton
resilient or rigid sealing. wheel type), Woltman Meters and Volumetric
Meters.
Available in sizes: 1/2” (15mm) - 24” (600mm).

34
 Series 100 Valves

Typical Applications

35
DOROT AUTOMATIC CONTROL VALVES

Founded in 1946, DOROT is a leading developer, manufacturer and marketer of

a wide range of superior quality automatic control valves. DOROT’s experienced
Research & Development Dept. has a long tradition of generating innovative
solutions for the application of water control systems. These include, waterworks
distribution networks, sewage and effluent disposal, fire protection, mining and
irrigation systems.

DOROT’s commitment to excellence begins with using the highest quality

materials. The company’s engineering experts are constantly working to provide
customers with a broad range of valve patterns and sizes in a wide variety of
metals and grades including: Cast Iron, Ductile Iron, Cast Steel, SST, Bronze,
Marine Bronze, Polyamide and P.V.C.

The experts at DOROT custom-design each valve application according to

specific control requirements. Most of the production process, which includes
machining and coating, takes place in modern in-house facilities.
Before leaving the factory, each product is hydraulically tested. An advanced
testing laboratory simulates the anticipated field conditions.

With distribution in more than 70 countries world-wide, a key component of

the DOROT difference is its outstanding customer service. This includes field
assistance, technical advice, training programs and follow-up consultations.

It is all of these factors that make DOROT a leader in fluid control technology
and customer satisfaction.

www.dorot.com • E-mail: info_d@dorot.com