Air and Inert Gas 2/2•3/2

Intrinsically Safe Valves 4/2•5/2•5/3

4 Brass, Aluminum, or Stainless Steel Bodies
1/4" to 1" NPT
SERIES
IS

Features
• Intrinsically safe solenoid enclosures to provide corrosion % # )
resistance in harsh environments
• Designed solely for installation in intrinsically safe areas,
with properly approved and sized current and voltage-
limiting safety barriers
• Acceptable for use in hazardous locations, as classified
by the National Electrical Code: Classes I, II, and III,
Division 1, including Groups A through G
• Electronically enhanced solenoids have efficient
cartridge operators and nonpolarized coils
• Triple redundant diodes prevent electrical pulse from
flowing back into the hazardous area
• Mountable in any position
Ordering Information
Solenoid Operators The LCP Intrinsically Safe solenoid enclosure is

SPECIAL SERVICE
designatedby the prefix “WBIS”. The Epoxy Din
WBIS: Watertight, Type 3, 3S, 4, 4X, IP-67. Liquid Crystal Polymer (LCP) Connector is ordered by prefix “ISSC”.

PILOT
overmolded with 1/2" NPT conduit connection and screw terminals for
Example: WBIS8314A300 Spare Coil P/Ns
simple wiring. The terminal block will accommodate 18 gage (AWG) wire,
and grounding screw is located inside the enclosure. ISSC8314A300 WBIS: 274445-001*
ISSC: 268976-001*
ISSC: DIN 43650/ISO 4400, IP-65 Epoxy overmolded with Din Connector
supplied, suitable to accept wiring cable diameters of 0.310 to 0.400 inches. Nominal Ambient Temp. Ranges
Series Body Material Temperature Range
Solenoid Construction 8551
8262
Aluminum 5˚F to 140˚F (-15˚C to 60˚C)

Gasket Cover NBR 8314

Cover Screw 18-8 Stainless Steel Brass
8317 -40˚F to 140˚F (-40˚C to 60˚C)
Cover Screw Gasket NBR 8551
Sleeve 430F Stainless Steel 8551 316L Stainless Steel
8316 Suffix V 32˚F to 140˚F (0˚C to 60˚C)
Nameplate Stainless Steel Misc.
All Other -4˚F to 140˚F (-20˚C to 60˚C)
Burp Cap Assembly PA/CR
Approvals
Valve Construction FM approved under J.I.3W8A8. AX (3610).
CSA certified under File LR-13976.
Valve Parts in Contact with Fluids
ATEX Ex II1G Ex ia IIC T6 approved
Body Aluminum Brass Stainless Steel IEC Ga Ex ia IIC T6 approved
Seals and Discs PUR, NBR, FKM, CR, as listed Meets applicable CE directives.
Sleeve 304L Stainless Steel Refer to Engineering Section for details.
Core and Plugnut 430F Stainless Steel
Important
Core Springs 302 Stainless Steel
These solenoids are intended for use on clean, dry air or
Pilot Seat Cartridge (Series 8316 & 8344 only) CA inert gas filtered to 50 micrometers or better. To prevent
Rider Rings PTFE freezing, the dew point of the media should be at least
Spring Retainer CA 18˚F (-8˚C) below the minimum temperature to which any
portion of the clean air or gas system could be exposed.
Instrument air in compliance with ANSI/ISA Standard
Electrical S7.3-1975 (R1981) exceeds the above requirements and
Nominal Wattage is 0.35 @ 24 VDC is, therefore, an acceptable medium for these valves.
Maximum Allowable "Off" State Current to the Valves must be less than 1 mA.
Electronically Enhanced "IS" Solenoid: Maximum Entity Parameters
Maximum Capacitor Charge Time — 1 second Entity Groups A-D Groups C-D
Minimum Time between Cycles — 1 second Parameters V max - 30 VDC V max - 34 VDC
Minimum Drop Current to Reset Electronic Coil — 2 mA I max - 100 mA I max - 125 mA
Capacitance = 0 Capacitance = 0
Nominal Temperature Rise at 24 VDC and 300 Ohms — 2˚C (36˚F)
Inductance = 0 Inductance = 0
Maximum Recommended Wire Run (#18 Wire) — 1.5 miles from barrier to valve
Important: Minimum series resistance of 200 ohms required in wiring Standard Voltage: 24 VDC only (±10%)
circuit if a safety barrier is not used for non-"IS" system. Minimum Operating Current: 0.028 amps 137
IS_ValvesR2
 2/2•3/2
4/2•5/2•5/3
SERIES
IS 4
Specifications (English units)
2/2 VALVES, NORMALLY CLOSED, with NBR Disc
Operating Pressure
Differential (psi)
Pipe Orifice Air-Inert Gas Brass Body Stainless Steel Body
Size Size Cv Flow Max. Fluid and Const. Const.
(ins.) (ins.) Factor Min. Max. Ambient Temp. ˚F Catalog Number Ref. Catalog Number Ref.
1/4 1/16 .08 0 150 140 WBIS8262A320 1 WBIS8262A386 1A
3/8 5/16 1.5 10 150 140 WBIS8223A323 2 - -
1/2 3/8 3.2 25 150 140 WBIS8223A303 3 WBIS8223A310 3
3/2 VALVES
Operating Pressure
Differential (psi)
Cv Flow
Pipe Orifice Factor Air-Inert Gas Brass Body Stainless Steel Body
Size Size Pressure to Cylinder to Max. Fluid and Const. Const.
(ins.) (ins.) Cylinder Exhaust Min. Max. Ambient Temp. ˚F Catalog Number Ref. Catalog Number Ref.
UNIVERSAL OPERATION (Pressure at any port) with NBR Disc
1/4 1/16 .08 .08 0 150 140 WBIS8314A300 4 WBIS8314A301 4A
NORMALLY CLOSED (Closed when de-energized)
SPECIAL SERVICE

1/4 5/16 1.5 1.5 ‘ 150 140 WBIS8316A301 Ž 5 WBIS8316A381V  8

PILOT

3/8 5/16 1.8 1.8 ‘ 150 140 WBIS8316A302 Ž 5 WBIS8316A382V  8

3/8 5/8 4 4 ‘ 150 140 WBIS8316A303 Ž 6 - -
1/2 5/8 4 4 ‘ 150 140 WBIS8316A304 Ž 6 WBIS8316A384V  9
3/4 11/16 5.5 5.5 10 150 140 WBIS8316A374 Ž 7 - -
1 1 13 13 10 150 140 WBIS8316A334 Ž 7A - -
UNIVERSAL OPERATION (Normally Closed or Normally Open) “Quick Exhaust” with CR Diaphragm and NBR Disc
1/4  .08 .73 5 150 140 WBIS8317A307 Œ 10 WBIS8317A308 Œ 11
4/2 VALVES, with NBR Disc and Seal
1/4 1/16 .08 .08 10 150 140 WBIS8345A301 ŒŽ 12 WBIS8345A381 ŒŽ 12

4/2 VALVES, Brass Body with NBR Disc Const. Const.

Single Solenoid Ref. Dual Solenoid Ref.
1/4 1/4 .80 1 10 150 140 WBIS8344A370 ŒŽ 13 WBIS8344A344 Ž 16
3/8 3/8 1.4 2.2 10 150 140 WBIS8344A372 ŒŽ 14 WBIS8344A380 Ž 17
1/2 3/8 1.4 2.2 10 150 140 WBIS8344A374 ŒŽ 14 WBIS8344A382 Ž 17
3/4 3/4 5.2 5.6 10 150 140 WBIS8344A376 ŒŽ 15 WBIS8344A354 Ž 18
1 3/4 5.2 5.6 10 150 140 WBIS8344A378 ŒŽ 15 WBIS8344A356 Ž 18
Œ There are two exhaust flows in the exhaust mode (pilot and main). The pilot  Diaphragm and main disc FKM only (pilot is low-temperature NBR).
exhaust must be connected to the main exhaust when the air or inert gas can ‘ Zero minimum when valve selection gasket is in external position and proper
not be exhausted to the atmosphere. auxiliary air pressure is applied. See chart on page 150 for auxiliary
 For “Quick Exhaust” valves, pressure port is 1/16", exhaust port is 1/4". pressure vs. mainline pressure. Minimum 15 psi Operating Pressure Differential
Ž IMPORTANT: A minimum operating pressure differential must be maintained when selection gasket is in the internal position.
between the pressure and exhaust ports. Supply and exhaust piping must be full
area, unrestricted. ASCO flow controls and other similar components must be
installed in the cylinder lines only.

138
IS_ValvesR2
 2/2•3/2
4/2•5/2•5/3
4 SERIES
IS

Specifications (English units)

Single Solenoid Dual Solenoid
Operating Pressure Operating Pressure
Differential (psi) Differential (psi)
Pipe Orifice Cv Max. Max.
Air-Inert Gas Air-Inert Gas
Body Size Size Flow Fluid Catalog Const. Fluid Catalog Const.
Material (ins.) (ins.) Factor Min. Max. Temp.˚F Number Ref. Min. Max. Temp.˚F Number Ref.
3/2, 5/2, 5/3 VALVES, with NBR and PUR Seals
Aluminum 3/2 WBIS8551A305 19 WBIS8551A306 19
Aluminum 5/2 WBIS8551A317 20 WBIS8551A318 20
Aluminum 5/3 Center Closed - - WBIS8551A367 20
Aluminum 5/3 Center Open - - WBIS8551A368 20
1/4 1/4 .86
Brass 3/2 WBIS8551A307 19 WBIS8551A308 19
30 150 140 30 150 140
Brass 5/2 WBIS8551A319 20 WBIS8551A320 20
316L Stainless Steel 3/2 WBIS8551A313  19 WBIS8551A314  19
316L Stainless Steel 5/2 WBIS8551A321  20 WBIS8551A322  20
Aluminum 3/2 WBIS8553A305 19 WBIS8553A306 19
1/2 1/2 3.7
Aluminum 5/2 WBIS8553A317 20 WBIS8553A318 20

SPECIAL SERVICE
PILOT
Single Solenoid Dual Solenoid
Operating Pressure Operating Pressure
Differential (psi) Differential (psi)
Pipe Orifice Cv Max. Max.
Air-Inert Gas Air-Inert Gas
Body Size Size Flow Fluid Catalog Const. Fluid Catalog Const.
Material (ins.) (ins.) Factor Min. Max. Temp.˚F Number Ref. Min. Max. Temp.˚F Number Ref.
3/2, 5/2, 5/3 VALVES, with NBR and PUR Seals, NAMUR Mount
Aluminum 3/2, 5/2 WBIS8551A301 x 21 WBIS8551A302 x 21
Aluminum 5/3 Center Closed - - WBIS8551A365 22
Aluminum 5/3 Center Open 1/4 1/4 .86 - - WBIS8551A366 22
30 150 140 30 150 140
Brass 3/2, 5/2 WBIS8551A303 x 21 WBIS8551A304 x 21
316L Stainless Steel 3/2, 5/2 WBIS8551A309  22 WBIS8551A310  22
Aluminum 3/2, 5/2 1/2 1/2 3.7 WBIS8553A301 22 WBIS8553A302 22
x 1/8" NPT exhaust for 1/4" aluminum and brass.  Can be used for dry natural gas service.

139
IS_ValvesR2
 2/2•3/2
4/2•5/2•5/3
SERIES
IS 4
Specifications (Metric units)
2/2 VALVES, NORMALLY CLOSED, with NBR Disc
Operating Pressure
Differential (bar)
Pipe Orifice Air-Inert Gas Brass Body Stainless Steel Body
Size Size Kv Flow Max. Fluid and Const. Const.
(ins.) (mm) Factor (m3/h) Min. Max. Ambient Temp. ˚C Catalog Number Ref. Catalog Number Ref.
1/4 1 .07 0 10.3 60 WBIS8262A320 1 WBIS8262A386 1A
3/8 8 1.29 0.7 10.3 60 WBIS8223A323 2 - -
1/2 10 2.74 1.7 10.3 60 WBIS8223A303 3 WBIS8223A310 3
3/2 VALVES
Operating Pressure
Differential (bar)
Kv Flow
Pipe Orifice Factor (m3/h) Air-Inert Gas Brass Body Stainless Steel Body
Size Size Pressure to Cylinder to Max. Fluid and Const. Const.
(ins.) (mm) Cylinder Exhaust Min. Max. Ambient Temp. ˚C Catalog Number Ref. Catalog Number Ref.
UNIVERSAL OPERATION (Pressure at any port) with NBR Disc
1/4 2 .07 .07 0 10.3 60 WBIS8314A300 4 WBIS8314A301 4A
NORMALLY CLOSED (Closed when de-energized)
SPECIAL SERVICE

1/4 8 1.29 1.29 ‘ 10.3 60 WBIS8316A301 Ž 5 WBIS8316A381V  8

PILOT

3/8 8 1.37 1.37 ‘ 10.3 60 WBIS8316A302 Ž 5 WBIS8316A382V  8

3/8 16 3.43 3.43 ‘ 10.3 60 WBIS8316A303 Ž 6 - -
1/2 16 3.43 3.43 ‘ 10.3 60 WBIS8316A304 Ž 6 WBIS8316A384V  9
3/4 17 4.71 4.71 0.7 10.3 60 WBIS8316A374 Ž 7 - -
1 25 11.14 11.14 0.7 10.3 60 WBIS8316A334 Ž 7A - -
UNIVERSAL OPERATION (Normally Closed or Normally Open) “Quick Exhaust” with CR Diaphragm and NBR Disc
1/4  .07 .63 0.3 10.3 60 WBIS8317A307 Œ 10 WBIS8317A308 Œ 11
4/2 VALVES, with NBR Disc and Seal
1/4 2 .07 .07 0.7 10.3 60 WBIS8345A301 ŒŽ 12 WBIS8345A381 ŒŽ 12

4/2 VALVES, Brass Body with NBR Disc Const. Const.

Single Solenoid Ref. Dual Solenoid Ref.
1/4 6 .69 .86 0.7 10.3 60 WBIS8344A370 ŒŽ 13 WBIS8344A344 Ž 16
3/8 10 1.20 1.89 0.7 10.3 60 WBIS8344A372 ŒŽ 14 WBIS8344A380 Ž 17
1/2 10 1.20 1.89 0.7 10.3 60 WBIS8344A374 ŒŽ 14 WBIS8344A382 Ž 17
3/4 19 4.46 4.80 0.7 10.3 60 WBIS8344A376 ŒŽ 15 WBIS8344A354 Ž 18
1 19 4.46 4.80 0.7 10.3 60 WBIS8344A378 ŒŽ 15 WBIS8344A356 Ž 18
Œ There are two exhaust flows in the exhaust mode (pilot and main). The pilot  Diaphragm and main disc FKM only (pilot is low-temperature NBR).
exhaust must be connected to the main exhaust when the air or inert gas can ‘ Zero minimum when valve selection gasket is in external position and proper
not be exhausted to the atmosphere. auxiliary air pressure is applied. See chart on page 150 for auxiliary
 For “Quick Exhaust” valves, pressure port is 1/16", exhaust port is 1/4". pressure vs. mainline pressure. Minimum 1 bar Operating Pressure Differential
Ž IMPORTANT: A minimum operating pressure differential must be maintained when selection gasket is in the internal position.
between the pressure and exhaust ports. Supply and exhaust piping must be full
area, unrestricted. ASCO flow controls and other similar components must be
installed in the cylinder lines only.

140
IS_ValvesR2
 2/2•3/2
4/2•5/2•5/3
4 SERIES
IS

Specifications (Metric units)

Single Solenoid Dual Solenoid
Operating Pressure Operating Pressure
Differential (bar) Differential (bar)
Pipe Orifice Kv Max. Max.
Air-Inert Gas Air-Inert Gas
Body Size Size Flow Fluid Catalog Const. Fluid Catalog Const.
Material (ins.) (mm) Factor Min. Max. Temp.˚C Number Ref. Min. Max. Temp.˚C Number Ref.
3/2, 5/2, 5/3 VALVES, with NBR and PUR Seals
Aluminum 3/2 WBIS8551A305 19 WBIS8551A306 19
Aluminum 5/2 WBIS8551A317 20 WBIS8551A318 20
Aluminum 5/3 Center Closed - - WBIS8551A367 20
Aluminum 5/3 Center Open - - WBIS8551A368 20
1/4 6 .7
Brass 3/2 WBIS8551A307 19 WBIS8551A308 19
2 10 60 2 10 60
Brass 5/2 WBIS8551A319 20 WBIS8551A320 20
316L Stainless Steel 3/2 WBIS8551A313  19 WBIS8551A314  19
316L Stainless Steel 5/2 WBIS8551A321  20 WBIS8551A322  20
Aluminum 3/2 WBIS8553A305 19 WBIS8553A306 19
1/2 13 3.7
Aluminum 5/2 WBIS8553A317 20 WBIS8553A318 20

SPECIAL SERVICE
PILOT
Single Solenoid Dual Solenoid
Operating Pressure Operating Pressure
Differential (bar) Differential (bar)
Pipe Orifice Kv Max. Max.
Air-Inert Gas Air-Inert Gas
Body Size Size Flow Fluid Catalog Const. Fluid Catalog Const.
Material (ins.) (mm) Factor Min. Max. Temp.˚C Number Ref. Min. Max. Temp.˚C Number Ref.
3/2, 5/2, 5/3 VALVES, with NBR and PUR Seals, NAMUR Mount
Aluminum 3/2, 5/2 WBIS8551A301 x 21 WBIS8551A302 x 21
Aluminum 5/3 Center Closed - - WBIS8551A365 22
Aluminum 5/3 Center Open 1/4 6 .7 - - WBIS8551A366 22
2 10 60 2 10 60
Brass 3/2, 5/2 WBIS8551A303 x 21 WBIS8551A304 x 21
316L Stainless Steel 3/2, 5/2 WBIS8551A309  22 WBIS8551A310  22
Aluminum 3/2, 5/2 1/2 13 3.7 WBIS8553A301 22 WBIS8553A302 22
x 1/8" NPT exhaust for 1/4" aluminum and brass.  Can be used for dry natural gas service.

141
IS_ValvesR2
 2/2•3/2
4/2•5/2•5/3
SERIES
IS 4
Dimensions: inches (mm)

Const. Ref. 1, 1A
SPECIAL SERVICE
PILOT

Const. Ref. 2

142
IS_ValvesR2
 2/2•3/2
4/2•5/2•5/3
4 SERIES
IS

Dimensions: inches (mm)

Const. Ref. 3

SPECIAL SERVICE
PILOT
Const. Ref. 4, 4A

143
IS_ValvesR2
 2/2•3/2
4/2•5/2•5/3
SERIES
IS 4
Dimensions: inches (mm)

Const. Ref. 5
SPECIAL SERVICE
PILOT

Const. Ref. 6

144
IS_ValvesR2
 2/2•3/2
4/2•5/2•5/3
4 SERIES
IS

Dimensions: inches (mm)

Const. Ref. 7, 7A

SPECIAL SERVICE
PILOT
Catalog No. A B C H K L M N P R W X
ins. 1.61 1.41 1.66 7.23 3.71 3.38 2.16 .53 5.54 .50 3.31 4.19
WBIS8316A374
mm 41 36 42 184 94 86 55 13 141 13 84 106
ins. - 1.78 - 7.85 3.96 4.44 2.81 .87 5.79 1.74 5.32 4..81
WBIS8316A334
mm - 45 - 199 100 113 71 22 147 44 135 122

Const. Ref. 8

145
IS_ValvesR2
 2/2•3/2
4/2•5/2•5/3
SERIES
IS 4
Dimensions: inches (mm)

Const. Ref. 9
Refer to note ‘.
For all 8316 “0” Minimum Series only.
MAINLINE PRESSURE vs. PILOT LINE PRESSURE
WHEN SELECTION GASKET IS IN EXTERNAL POSITION

120
106
PILOT LINE PRESSURE (psi)

90
75
60
45
30
15
0
0 15 30 45 60 75 90 105 120 135 150
SPECIAL SERVICE

MAINLINE PRESSURE (psi)

PILOT

Const. Ref. 10

146
IS_ValvesR2
 2/2•3/2
4/2•5/2•5/3
4 SERIES
IS

Dimensions: inches (mm)

Const. Ref. 11

SPECIAL SERVICE
PILOT
Const. Ref. 12

147
IS_ValvesR2
 2/2•3/2
4/2•5/2•5/3
SERIES
IS 4
Dimensions: inches (mm)

Const. Ref. 13-18

13-15 16-18
SPECIAL SERVICE
PILOT

All

Exhaust
Catalog No. ØC E F G H J K L M N P W X Y Z Pipe Size
ins. .28 .56 2.41 1.88 5.12 1.03 2.33 3.13 2.08 .72 4.16 4.75 1.41 1.56 .81
WBIS8344A370 3/8"
mm 7.1 14 61 48 130 26 59 80 53 18 106 121 36 40 21
ins. .34 .77 3.12 2.62 5.72 1.50 2.77 3.18 2.06 .83 4.60 6.06 1.86 1.90 .84
WBIS8344A380, 382 1/2"
mm 8.6 20 79 67 145 38 70 81 52 21 117 154 47 48 21
ins. .34 .77 3.12 2.62 5.10 1.50 2.14 3.18 2.06 .83 3.98 6.06 1.86 1.90 .84
WBIS8344A372, 374 1/2"
mm 8.6 20 79 67 120 38 54 81 52 21 101 154 47 48 21
ins. .28 .56 2.41 1.88 5.12 1.03 2.74 3.13 2.08 .72 4.16 4.75 1.41 1.56 .81
WBIS8344A344 3/8"
mm 7.1 14 61 48 130 26 70 80 53 18 106 121 36 40 21
ins. .34 1.37 3.81 3.88 5.90 2.09 2.52 4.56 2.86 1.55 4.35 8.25 2.12 2.63 1.16
WBIS8344A376, 378 1"
mm 8.6 35 97 99 150 53 64 116 73 39 110 210 54 67 30
ins. .34 137 3.81 3.88 6.54 2.09 3.21 4.56 2.81 1.55 4.35 8.25 2.12 2.63 1.16
WBIS8344A354, 356 1"
mm 8.6 35 97 99 168 53 81 116 71 39 110 210 54 67 30
IMPORTANT: Valves can be mounted in any position.

148
IS_ValvesR2
 2/2•3/2
4/2•5/2•5/3
4 SERIES
IS

Dimensions: inches (mm)

Series 8551 8553 Const. Ref. 19

NPT 1/4 1/2 4.15 (105)

L1 x 5.12 (132) 6.00 (153) 1.96 (48)

3.16 (80)
L2 x 6.73 (171) 7.80 (198)
H2 4.38 (111) 4.77 (121)
1/2 NPT
H1 1.10 (28) 1.58 (40)
3.04 (77)
W 1.77 (45) 2.85 (72)
H2
x Manual override option MH adds .250" (6.4),
MS option adds .468" (11.9) to each solenoid endcap.
3 1

H1
Optional Manual Operators
Add Suffix Description 1/8 NPT AUX. PRESSURE PORT
1 W L1
Push and turn to lock with flat
MO L2
0 2
head screwdriver slot
1
Momentary push in with flat
MI
head screwdriver slot

SPECIAL SERVICE
0 2
1

PILOT
MH Momentary push in by hand
0 2

MS 0 2
Push and turn to lock by hand

Series 8551 8553 Const. Ref. 20

NPT 1/4 1/2 4.15 (105)

L1 x 5.63 (144) 7.06 (180) 1.96 (48)

3.16 (80)
L2 x 7.20 (183) 8.86 (225)
H2 4.38 (111) 4.77 (121)
1/2 NPT
H1 1.10 (28) 1.58 (40)
3.04 (77)
W 1.77 (45) 2.85 (72)
H2
x Manual override option MH adds .250" (6.4),
MS option adds .468" (11.9) to each solenoid endcap. 5 1 3

H1
Optional Manual Operators
Add Suffix Description 1/8 NPT AUX. PRESSURE PORT
L1
1 W
Push and turn to lock with flat L2
MO
0 2
head screwdriver slot
1
Momentary push in with flat
MI
0 2
head screwdriver slot
1

MH Momentary push in by hand

0 2

MS 0 2
Push and turn to lock by hand

149
IS_ValvesR2
 2/2•3/2
4/2•5/2•5/3
SERIES
IS 4
Dimensions: inches (mm)

Series 8551 (Aluminum, Brass)

NPT 1/4 Const. Ref. 21
L1 x 4.96 (126) 4.15 (105)

L2 x 6.49 (165) 3.16 (80)

1.96 (48)

H2 4.38 (111)
H1 1.57 (40) 1/2 NPT

W 1.77 (45) 3.04 (77)

x Manual override option MH adds .250" (6.4), H2

MS option adds .468" (11.9) to each solenoid endcap.
3 1
Optional Manual Operators
H1
Add Suffix Description
1
Push and turn to lock with flat
MO W
1/8 NPT AUX. PRESSURE PORT

0 2
head screwdriver slot L1

1 L2
Momentary push in with flat
MI
0 2
head screwdriver slot 8551 NAMUR Footprint
SPECIAL SERVICE

1
PILOT

MH Momentary push in by hand

0 2

1.26 (32)
2 4

MS 0 2
Push and turn to lock by hand
.95 (24)

Series 8551 (316L SS) 8551 (5/3) 8553 Const. Ref. 22 1

NPT 1/4 1/4 1/2 4.15 (105)

L1 x 5.20 (132) - 7.08 (180) 3.16 (80)

1.96 (48)

L2 x 6.73 (171) 7.44 (189) 8.85 (225)

H2 4.38 (111) 4.38 (111) 4.77 (121) 1/2 NPT

H1 1.57 (40) 1.57 (40) 2.08 (53) 3.04 (77)

W 1.77 (45) 1.77 (45) 2.87 (73) H2

x Manual override option MH adds .250" (6.4),

MS option adds .468" (11.9) to each solenoid endcap. 5 1 3

H1
Optional Manual Operators
Add Suffix Description W 1/8 NPT AUX. PRESSURE PORT
1
Push and turn to lock with flat L1
MO
0 2
head screwdriver slot L2

1
Momentary push in with flat 8553 NAMUR Footprint 8551 NAMUR Footprint
MI
0 2
head screwdriver slot
1
1.26 (32)

MH Momentary push in by hand 2 4

0 2
2 4
1.77 (45)

MS 0 2
Push and turn to lock by hand .95 (24)

1.57 (40)

150
IS_ValvesR2