ARI-STEVI® 450 / 451 (DN15-150)

Control valve - 3-way-form (mixing/diverting valve) (optional with screwed seat ring)
With pneumatic and electric actuators

ARI-STEVI® 450 / 451

Pneumatic actuator
ARI-DP 32-34T
• Reversible pneumatic actuator
• Actuator with rolling diaphragm
• Air supply pressure max. 6 bar
• Stem protection by bellow
• Maintenance-free O-ring sealing
• Assembly of additional devices acc. to
DIN IEC 60534-6

Page 4 Fig. 450

ARI-STEVI® 450 / 451

Electric actuator
ARI-PREMIO 2,2-25 kN
ARI-PREMIO-Plus 2G 2,2-25 kN
• Enclosure IP 65
• 2 torque switches
• Handwheel
• Additional devices available, e.g. potentiometer

Page 10

ARI-STEVI® 450 / 451

Electric actuator
AUMA SAR 07.2 - 14.2
• Enclosure IP 67
• 2 torque switches
• 2 travel switches
• Handwheel
• Overheating protection for motor as standard Fig. 451
• Additional devices available, e.g. potentiometer
• Explosion proof version available

Page 12

Edition 08/17 - Data subject to alteration - Regularly updated data on www.ari-armaturen.com! Data sheet 450001 englisch (english)
 ARI-STEVI® 450 / 451 (DN15-150)
Valve: Technical data

Figure Nominal pressure Material Nominal diameter Information / restriction of technical rules need to be observed!
12.450 / 12.451 PN16 EN-JL1040 DN15-100 ARI-Valves of EN-JL1040 are not allowed to be operated in systems acc. to
TRD 110.
22.450 / 22.451 PN16 EN-JS1049 DN15-150
A production permission acc. to TRB 801 No. 45 is available.
23.450 / 23.451 PN25 EN-JS1049 DN15-150
(EN-JL1040 acc. to TRB 801 No. 45 is not allowed.)
34.450 / 34.451 PN25 1.0619+N DN15-150
The engineer, designing a system or a plant, is responsible for the selection of
35.450 / 35.451 PN40 1.0619+N DN15-150 the correct valve.
55.450 / 55.451 PN40 1.4408 DN15-150 Resistance and fitness must be verified, contact manufacturer for information
Other materials and versions on request. (refer to Product overview and Resistance list).

Stem sealing
Fig. 450 standard optional
DN15- 150 DN15- 150 DN15- 150

I. PTFE-V-ring unit I. EPDM-sealing II. PTFE-packing

-10°C to 220°C -10°C to 150°C -10°C to 250°C
(allowed for water and steam up to 180°C) II. Pure graphite-packing
-10°C to 450°C

Fig. 451 standard optional

DN15- 150 DN15- 100 DN125-150

III. Stainless steel-bellow III. Stainless steel-bellow with V-ring unit III. Stainless steel bellows seal
with pure graphite-packing -60°C to 220°C with EPDM-sealing
-60°C to 450°C -60°C to 150°C
(allowed for water and steam up to 180°C)

Intermediate values for max. permissible operational pressures can be determined by linear interpolation
Pressure-temperature-ratings of the given temperature / pressure chart.

acc. to DIN EN 1092-2 -60°C to <-10°C 1) -10°C to 120°C 150°C 200°C 250°C 300°C 350°C 400°C 450°C
EN-JL1040 PN16 (bar) -- 16 14,4 12,8 11,2 9,6 -- -- --
EN-JS1049 PN16 (bar) on request 16 15,5 14,7 13,9 12,8 11,2 -- --
EN-JS1049 PN25 (bar) on request 25 24,3 23 21,8 20 17,5 -- --

acc. to manufacturers standard -60°C to <-10°C 1) -10°C to 120°C 150°C 200°C 250°C 300°C 350°C 400°C 450°C
1.0619+N PN25 (bar) 18,7 25 23,9 22 20 17,2 16 14,8 8,2
1.0619+N PN40 (bar) 30 40 38,1 35 32 28 25,7 23,8 13,1

acc. to DIN EN 1092-1 -60°C to <-10°C 1) -10°C to 100°C 150°C 200°C 250°C 300°C 350°C 400°C 450°C
1.4408 PN40 (bar) 40 40 36,3 33,7 31,8 29,7 28,5 27,4 --

1) Valve with extended bonnet, studs and nuts made of A4-70 (at temperatures below -10°C)

2 Edition 08/17 - Data subject to alteration - Regularly updated data on www.ari-armaturen.com!

 ARI-STEVI® 450 / 451 (DN15-150)
Plug design / Operation

Plug design standard Guiding Rangeability

A

DN15-100: - Leakage class IV acc. to DIN EN 60534-4 AB Spindle /

30 : 1
Mixing plug with one rolled seat - Flow characteristic: linear (lin) / linear (lin) Seat ring
ring and one screwed seat ring
• Parabolic plug, metal seat;
V-port plug, metal seat
B
A

DN125-150 and stainless steel: - Leakage class IV acc. to DIN EN 60534-4 Spindle /
AB 30 : 1
Mixing plug - Flow characteristic: linear (lin) / linear (lin) Seat ring
with two screwed seat rings
• Parabolic plug, metal seat;
V-port plug, metal seat
B

AB
DN40-150: - Leakage class IV acc. to DIN EN 60534-4 Spindle /
30 : 1
Diverting plug - Flow characteristic: linear (lin) / linear (lin) Seat ring
with two screwed seat rings
• Parabolic plug, metal seat;
V-port plug, metal seat

B
Plug design optional Guiding Rangeability

- Leakage class IV acc. to DIN EN 60534-4

DN15-100: AB Spindle /
- Flow characteristic: linear (lin) / linear (lin) 30 : 1
Mixing plug with two screwed Seat ring
seat rings - further reductions possible
• Parabolic plug, metal seat;
V-port plug, metal seat
B

Operation

ARI-Control valves are suitable for use with pneumatic

or electric actuators.
According to the application two different variations are
possible (see drawings on the left)
Design with mixing plug as standard.
Select when the valve is used for mixing service
(2 inlets, 1 outlet).
DN 15 - 32 with mixing plug can also be used for
diverting service (1 inlet, 2 outlets).
In exceptions the design with mixing plug can also be
used in diverting service for DN ≥40. Only small closing
pressures are possible.
Design with mixing plug DN 15-150 Design with diverting plug DN 40-150 Design with diverting plug will be used exclusively for
(Attention: reduced Kvs-values) diverting service.

Edition 08/17 - Data subject to alteration - Regularly updated data on www.ari-armaturen.com! 3

 ARI-STEVI® 450 / 451 (DN15-150)
Pneumatic actuator ARI-DP
Control valve in 3-way-form with pneumatic actuator DP (3-way mixing valve / 3-way diverting valve)

Fig. 450 Fig. 451

Heights and weights

DN 15 20 25 32 40 50 65 80 100 125 150

Fig. 450 DP32 H (mm) 450 450 454 480 486 484 520 536 555 602 --
PN16 (kg) 14 15 16 19 22 26 33 39 56 76 --
PN40 (kg) 15 16 17 20 23 27 35 42 60 104 --
DP33 H (mm) 505 505 509 535 541 539 575 591 610 657 719
PN16 (kg) 20 21 22 25 28 32 39 45 62 82 110
PN40 (kg) 21 22 23 26 29 33 41 48 66 110 153
DP34 H (mm) -- -- -- -- -- -- 710 726 745 772 834
PN16 (kg) -- -- -- -- -- -- 69 75 92 112 140
PN40 (kg) -- -- -- -- -- -- 71 78 96 140 183
DP34T H (mm) -- -- -- -- -- -- -- -- -- 1062 1095
PN16 (kg) -- -- -- -- -- -- -- -- -- 198 222
PN40 (kg) -- -- -- -- -- -- -- -- -- 207 239

Fig. 451 DP32 H (mm) 635 635 639 665 655 649 755 768 784 -- --
PN16 (kg) 17 18 19 22 27 30 39 49 66 -- --
PN40 (kg) 18 19 20 23 28 32 42 52 72 -- --
DP33 H (mm) 690 690 694 720 710 704 810 823 839 1012 1045
PN16 (kg) 23 24 25 28 33 36 45 55 72 92 120
PN40 (kg) 24 25 26 29 34 38 48 58 78 120 163
DP34 H (mm) -- -- -- -- -- -- 945 958 974 1127 1160
PN16 (kg) -- -- -- -- -- -- 75 85 102 122 150
PN40 (kg) -- -- -- -- -- -- 78 88 108 150 193
DP34T H (mm) -- -- -- -- -- -- -- -- -- 1509 1542
PN16 (kg) -- -- -- -- -- -- -- -- -- 223 249
PN40 (kg) -- -- -- -- -- -- -- -- -- 234 267

Further dimensions refer to pages 16 - 17.

4 Edition 08/17 - Data subject to alteration - Regularly updated data on www.ari-armaturen.com!

 ARI-STEVI® 450 / 451 (DN15-150)
Pneumatic actuator ARI-DP

DP32 / DP33 / DP34 DP34T

Actuator data DP32 DP33 DP34 DP34T

ØA (mm) 250 300 405
Effective diaphragm area (cm2) 250 400 800 1600
Ø D1 (mm) 225 300 400
Top mounted
H1 (mm) 270 284 442 635
handwheel
Weight (kg) 5 17 41
Air supply pressure max. to actuator: 6 bar
Further technical data of the actuator: refer to data sheet ARI-DP.

Edition 08/17 - Data subject to alteration - Regularly updated data on www.ari-armaturen.com! 5

 ARI-STEVI® 450 / 451 (DN15-150)
Closing pressures: Pneumatic actuator ARI-DP32
max. permissible closing pressures on flow-to-open P2 = 0.
Observe pressure-temperature-limits, refer to page 2.

DN 15 20 25 32 40 50 65 80 100 125 150

standard (m3/h) 4 6,3 10 16 25 40 63 100 160 250 320
Kvs-value
reduced (m3/h) 2,5 4 6,3 10 16 25 40 63 100 160 250
max. diff. pressure 1) (bar) 40 30 25 15
Mixing function Seat-Ø A/B (mm) 21/20 21/25 27/27 31/32 41/40 51/50 66/60 81/75 101/95 120/120 140/140
Travel (mm) 20 30 50

DP32 I. (bar) 5,5 3,3 2,6 1,4

250 cm2 0,2-1,0 1,2 II. (bar) 2,3 1
Spring closes
A -> AB III. (bar)
on air failure I. (bar) 18,6 12,6 10,7 7,2 3,9 2,2
0,4-1,2 1,6 II. (bar) 15,4 10,3 8,7 5,8 3 1,6
Air supply pressure min. (bar) 2)

III. (bar) 8,6 8 7,1 4,6 1,7

Spring range (bar)

I. (bar) 40 31,4 26,8 18,8 11 6,8 3,7 2,2 1,2

(stem retracting
by spring) 0,8-2,4 3,2 II. (bar) 40 29,1 24,8 17,4 10,2 6,3 3,2 1,9 1
or
III. (bar) 26,4 25,7 23,2 16,2 8,9 5,4 2,9 1,7
Spring closes
B -> AB I. (bar) 40 40 39,1 23,5 15
on air failure
1,5-2,9 4,4 II. (bar) 40 40 37,7 22,7 14,4
III. (bar) 40 40 40 36,5 21,4 13,6
I. (bar) 40 32,5 20,8

(stem extending 2,0-3,8 5,8 II. (bar) 40 31,6 20,2

by spring) III. (bar) 40 30,3 19,4

15 20 25 32
DN 40 50 65 80 100 125 150
mixing plug for diverting
standard (m3/h) 4 6,3 10 16 14 25 45 60 95 170 200
Kvs-value
reduced (m3/h) 2,5 4 6,3 10
max. diff. pressure 1) (bar) 40 30 25 15
Diverting function Seat-Ø A/B (mm) 21/20 21/25 27/27 31/32 40/40 50/50 60/60 75/75 90/90 105/105 125/125
Travel (mm) 20 30
DP32 I. (bar) 2,7 1,6 1,3
250 cm2 0,2-1,0 1,2 II. (bar) 1,1
Spring closes
AB -> A III. (bar)
on air failure I. (bar) 9,3 6,3 5,3 3,6 4,1 2,3 1,2
0,4-1,2 1,6 II. (bar) 7,7 5,2 4,3 2,9 3,2 1,7
Air supply pressure min. (bar) 2)

III. (bar) 4,3 4 3,5 2,3 1,9

Spring range (bar)

I. (bar) 22,5 15,7 13,4 9,4 11,6 7,1 4,5 2,7 1,7 1,1
(stem extending
by spring) 0,8-2,4 3,2 II. (bar) 20,8 14,5 12,4 8,7 10,6 6,5 4 2,3 1,4
or III. (bar) 13,2 12,9 11,6 8,1 9,3 5,6 3,7 2,1 1,3
Spring closes
AB -> B I. (bar) 40 32,1 27,5 19,6 24,5 15,4
on air failure
1,5-2,9 4,4 II. (bar) 40 30,9 26,5 18,8 23,6 14,8
III. (bar) 28,7 28,4 25,7 18,3 22,3 14
I. (bar) 40 37,6 26,8 33,8 21,4

(stem retracting 2,0-3,8 5,8 II. (bar) 40 36,6 26,1 32,9 20,8
by spring) III. (bar) 39,8 39,5 35,8 25,5 31,6 19,9

I. Fig. 450: PTFE-V-ring unit / EPDM-sealing

II. Fig. 450: PTFE- / pure graphite-packing
III. Fig. 451: Bellows seal
1) max. differential pressure drop
2) Air supply pressure max. to actuator: 6 bar Restriction: a) 5 bar b) 4,5 bar c) 4 bar d) 3,5 bar e) 3 bar

6 Edition 08/17 - Data subject to alteration - Regularly updated data on www.ari-armaturen.com!

 ARI-STEVI® 450 / 451 (DN15-150)
Closing pressures: Pneumatic actuator ARI-DP33
max. permissible closing pressures on flow-to-open P2 = 0.
Observe pressure-temperature-limits, refer to page 2.

DN 15 20 25 32 40 50 65 80 100 125 150

standard (m3/h) 4 6,3 10 16 25 40 63 100 160 250 320
Kvs-value
reduced (m3/h) 2,5 4 6,3 10 16 25 40 63 100 160 250
max. diff. pressure 1) (bar) 40 30 25 15
Mixing function Seat-Ø A/B (mm) 21/20 21/25 27/27 31/32 41/40 51/50 66/60 81/75 101/95 120/120 140/140
Travel (mm) 20 30 50
DP33 I. (bar) 13,3 c)3) 8,8 c)3) 7,4 c)3) 4,9 c)3) 2,4 c)3) 1,2 c)3)
400 cm2 0,2-1,0 1,2 II. (bar) 10,1 c)3) 6,5 c)3) 5,4 c)3) 3,4 c)3) 1,6 c)3)
Spring closes III. (bar) 5 a)3) 4,3 a)3) 3,8 a)3) 2,2 a)3)
A -> AB
I. (bar) 34,2 c)3) 23,7 c)3) 20,2 c)3) 14,1 c)3) 8,1 c)3) 4,9 c)3) 2,5 3) 1,4 3)
on air failure
0,4-1,2 1,6 II. (bar) 31 c)3) 21,4 c)3) 18,3 c)3) 12,7 c)3) 7,3 c)3) 4,4 c)3) 2,1 3) 1,1 3)
III. (bar) 19,1 a)3) 18,5 a)3) 16,6 a)3) 11,5 a)3) 5,9 a)3) 3,5 a)3) 1,8 a)3)
Air supply pressure min. (bar) 2)

I. (bar) 40 a)3) 40 a)3) 40 a)3) 32,5 a)3) 19,5 a)3) 12,3 a)3) 7 3) 4,4 3) 2,6 3)
Spring range (bar)

0,8-2,4 3,2 II. (bar) 40 a)3) 40 a)3) 40 a)3) 31,1 a)3) 18,6 a)3) 11,8 a)3) 6,5 3) 4,1 3) 2,4 3)
(stem retracting
III. (bar) 40 3) 40 3) 40 3) 29,9 3) 17,3 3) 10,9 3) 6,2 3) 3,9 3) 2,3 3)
by spring)
or I. (bar) 14,8 9,6 6
Spring closes 1,5-3,0 4,5 II. (bar) 14,3 9,3 5,8
B -> AB III. (bar) 14 9,1 5,7
on air failure
I. (bar) 40 a) 40 a) 29 a)
1,7-2,7 4,4 II. (bar) 40 a) 40 a) 28,4 a)
III. (bar) 40 40 27,6
I. (bar) (40) 20,3 13,3 8,4
2,0-4,0 6,0
(stem extending II. (bar) (39,5) 19,9 12,9 8,2
(2,3-3,7) (6,0)
by spring) III. (bar) (38,7) 19,6 12,8 8,1

15 20 25 32
DN 40 50 65 80 100 125 150
mixing plug for diverting
standard (m3/h) 4 6,3 10 16 14 25 45 60 95 170 200
Kvs-value
reduced (m3/h) 2,5 4 6,3 10
max. diff. pressure 1) (bar) 40 30 25 15
Diverting function Seat-Ø A/B (mm) 21/20 21/25 27/27 31/32 40/40 50/50 60/60 75/75 90/90 105/105 125/125
Travel (mm) 20 30
DP33 I. (bar) 6,6 c)4) 4,4 c)4) 3,7 c)4) 2,4 c)4) 2,6 c)4) 1,3 c)4)
400 cm2 0,2-1,0 1,2 II. (bar) 5 c)4) 3,3 c)4) 2,7 c)4) 1,7 c)4) 1,7 c)4)
Spring closes III. (bar) 2,5 a)4) 2,2 a)4) 1,9 a)4) 1,1 a)4)
AB -> A
I. (bar) 17,1 c)4) 11,9 c)4) 10,1 c)4) 7 c)4) 8,5 c)4) 5,1 c)4) 3,2 4) 1,8 4) 1,1 4)
on air failure
0,4-1,2 1,6 II. (bar) 15,5 c)4) 10,7 c)4) 9,1 c)4) 6,3 c)4) 7,6 c)4) 4,5 c)4) 2,6 4) 1,4 4)

III. (bar) 9,6 a)4) 9,2 a)4) 8,3 a)4) 5,7 a)4) 6,3 a)4) 3,6 a)4) 2,3 a)4) 1,2 a)4)
Air supply pressure min. (bar) 2)

I. (bar) 38 a)4) 26,8 a)4) 23 a)4) 16,3 a)4) 20,3 a)4) 12,7 a)4) 8,5 4) 5,2 4) 3,5 4) 2,4 4) 1,6 4)
Spring range (bar)

0,8-2,4 3,2 II. (bar) 36,4 a)4) 25,6 a)4) 22 a)4) 15,6 a)4) 19,4 a)4) 12,1 a)4) 8 4) 4,9 4) 3,2 4) 2,2 4) 1,4 4)
(stem extending III. (bar) 23,7 4) 23,4 4) 21,2 4) 15 4) 18,1 4) 11,3 4) 7,6 4) 4,7 4) 3,1 4) 1,9 4) 1,2 4)
by spring)
I. (bar) 17,9 11,2 7,7 5,4 3,7
or
1,5-3,0 4,5 II. (bar) 17,3 10,9 7,4 5,2 3,6
Spring closes
AB -> B III. (bar) 17 10,7 7,3 5 3,4
on air failure I. (bar) 40 a) 40 a) 40 a) 37 a) 40 a) 29,8 a)
1,7-2,7 4,4 II. (bar) 40 a) 40 a) 40 a) 36,3 a) 40 a) 29,3 a)
III. (bar) 40 40 40 35,7 40 28,4
I. (bar) (40) (40) (40) 24,5 15,5 10,7 7,6 5,3
2,0-4,0 6,0
(stem retracting II. (bar) (40) (40) (40) 24 15,2 10,4 7,4 5,1
(2,3-3,7) (6,0)
by spring) III. (bar) (40) (40) (39,8) 23,6 15 10,3 7,2 5

I. Fig. 450: PTFE-V-ring unit / EPDM-sealing

II. Fig. 450: PTFE- / pure graphite-packing
III. Fig. 451: Bellows seal
1) max. differential pressure drop
2) Air supply pressure max. to actuator: 6 bar Restriction: a) 5 bar b) 4,5 bar c) 4 bar d) 3,5 bar e) 3 bar
3) At mixing function an spring closes direction A->AB, the max. permissible air supply pressure is 3,5 bar.
4) At diverting function an spring closes direction B->AB, the max. permissible air supply pressure is 3,5 bar.

Edition 08/17 - Data subject to alteration - Regularly updated data on www.ari-armaturen.com! 7

 ARI-STEVI® 450 / 451 (DN15-150)
Closing pressures: Pneumatic actuator ARI-DP34
max. permissible closing pressures on flow-to-open P2 = 0.
Observe pressure-temperature-limits, refer to page 2.

DN 65 80 100 125 150

standard (m3/h) 63 100 160 250 320
Kvs-value
reduced (m3/h) 40 63 100 160 250
max. diff. pressure 1) (bar) 30 25 15
Mixing function Seat-Ø A/B (mm) 66/60 81/75 101/95 120/120 140/140
Travel (mm) 30 50
I. (bar) 2,5 b) 1,5 b)
0,2-1,0 1,2 II. (bar) 2,1 b) 1,2 b)
DP34
III. (bar) 1,8 e) 1 e)
800 cm2
I. (bar) 7 b) 4,4 b) 2,7 b) 1,8 1,2
Spring closes
A -> AB 0,4-1,2 1,6 II. (bar) 6,6 b) 4,1 b) 2,5 b) 1,6 1,1
on air failure III. (bar) 6,3 d) 3,9 d) 2,3 d) 1,4 a)
I. (bar) 16 10,4 6,5 4,5 3,2
0,8-2,4 3,2 II. (bar) 15,5 10,1 6,3 4,3 3,1
Air supply pressure min. (bar) 2)

III. (bar) 15,2 b) 9,9 b) 6,2 b) 4,1 3

Spring range (bar)

(stem retracting I. (bar) 9,3 6,7

by spring) 1,5-3,0 4,5 II. (bar) 9,1 6,6
or III. (bar) 8,9 6,5
Spring closes 2,0-2,9 4,9 III. (bar) 40 27,7 a) 17,7 a)
B -> AB
on air failure I. (bar) 40 29,7 19
2,1-3,0 5,1
II. (bar) 40 29,4 18,8
I. (bar) 12,7 9,2
2,0-4,0 6,0 II. (bar) 12,5 9,1
III. (bar) 12,3 9
(stem extending
I. (bar) 34,2 21,9
by spring)
2,4-3,6 6,0 II. (bar) 33,9 21,7
III. (bar)

DN 65 80 100 125 150

standard (m3/h) 45 60 95 170 200
Kvs-value
reduced (m3/h)
max. diff. pressure 1) (bar) 30 25 15
Diverting function Seat-Ø A/B (mm) 60/60 75/75 90/90 105/105 125/125
Travel (mm) 30
DP34 I. (bar) 3,2 b) 1,8 b) 1,1 b)
800 cm2 0,2-1,0 1,2 II. (bar) 2,7 b) 1,5 b)
Spring closes III. (bar) 2,3 e) 1,2 e)
AB -> A
on air failure I. (bar) 8,6 b) 5,3 b) 3,5 b) 2,4 1,6
0,4-1,2 1,6 II. (bar) 8 b) 4,9 b) 3,2 b) 2,2 1,4
III. (bar) 7,7 d) 4,7 d) 3,1 d) 2 a) 1,3 a)
Air supply pressure min. (bar) 2)

I. (bar) 19,3 12,2 8,3 5,9 4,1

Spring range (bar)

0,8-2,4 3,2 II. (bar) 18,8 11,8 8,1 5,7 3,9

(stem extending
by spring) III. (bar) 18,4 b) 11,6 b) 7,9 b) 5,5 3,8
or I. (bar) 40 34,7 24 17,4 12,2
2,1-3,0 5,1
Spring closes II. (bar) 40 34,3 23,8 17,2 12
2,0-2,9* 4,9*
AB -> B III. (bar) 40 a)* 32,4 a)* 22,4 a)* 16,9 11,9
on air failure
I. (bar) 39,9 27,6 20 14,1
II. (bar) 39,5 27,4 19,8 13,9

2,4-3,6 6,0
III. (bar) 19,6 13,8
(stem retracting
by spring)

I. Fig. 450: PTFE-V-ring unit / EPDM-sealing

II. Fig. 450: PTFE- / pure graphite-packing
III. Fig. 451: Bellows seal
1) max. differential pressure drop
2) Air supply pressure max. to actuator: 6 bar Restriction: a) 5 bar b) 4,5 bar c) 4 bar d) 3,5 bar e) 3 bar
8 Edition 08/17 - Data subject to alteration - Regularly updated data on www.ari-armaturen.com!
 ARI-STEVI® 450 / 451 (DN125-150)
Closing pressures: Pneumatic actuator ARI-DP34T
max. permissible closing pressures on flow-to-open P2 = 0.
Observe pressure-temperature-limits, refer to page 2.

DN 125 150
standard (m3/h) 250 320
Kvs-value
reduced (m3/h) 160 250
max. diff. pressure 1) (bar) 15
Mixing function Seat-Ø A/B (mm) 120/120 140/140
Travel (mm) 50
DP34T I. (bar) 1,7 1,2
1600 cm2 0,2-1,0 1,2 II. (bar) 1,4 --
Spring closes III. (bar) 1,3 a) --
A -> AB
on air failure I. (bar) 4,5 3,2
0,4-1,2 1,6 II. (bar) 4,1 2,9
III. (bar) 4 a) 2,9 a)
I. (bar) 9,9 7,2
Air supply pressure min. (bar) 2)

0,8-2,4 3,2 II. (bar) 9,6 7

Spring range (bar)

III. (bar) 9,5 6,9

(stem retracting 14,3
I. (bar) 19,5
by spring)
1,5-3,0 4,5 II. (bar) 19,1 14
or
Spring closes III. (bar) 19 13,9
B -> AB I. (bar) 26,3 19,3
on air failure
II. (bar) 26 19

2,0-4,0 6,0
III. (bar) 25,9 18,9

(stem extending
by spring)

DN 125 150
standard (m3/h) 170 200
Kvs-value
reduced (m3/h)
max. diff. pressure 1) (bar) 15
Diverting function Seat-Ø A/B (mm) 105/105 125/125
Travel (mm) 30
DP34T I. (bar) 2,4 1,6
1600 cm2 0,2-1,0 1,2 II. (bar) 1,9 1,2
Spring closes III. (bar) 1,8 a) 1,1 a)
AB -> A
on air failure I. (bar) 5,9 4,1
0,4-1,2 1,6 II. (bar) 5,5 3,7
III. (bar) 5,3 a) 3,6 a)
I. (bar) 12,9 9,1
Air supply pressure min. (bar) 2)

0,8-2,4 3,2 II. (bar) 12,5 8,7

Spring range (bar)

III. (bar) 12,4 8,6

(stem extending
I. (bar) 35,9 25,3
by spring)
or 2,1-3,0 5,1 II. (bar) 35,4 25
Spring closes III. (bar) 35,3 24,9
AB -> B I. (bar) 40 29
on air failure
II. (bar) 40 28,7

2,4-3,6 6,0
III. (bar) 40 28,6

(stem retracting
by spring)
I. Fig. 450: EPDM-sealing
II. Fig. 450: PTFE- / pure graphite-packing
III. Fig. 451: Bellows seal
1) max. differential pressure drop
2) Air supply pressure max. to actuator: 6 bar Restriction: a) 5 bar b) 4,5 bar c) 4 bar d) 3,5 bar e) 3 bar

Edition 08/17 - Data subject to alteration - Regularly updated data on www.ari-armaturen.com! 9

 ARI-STEVI® 450 / 451 (DN15-150)
Electric actuator ARI-PREMIO / PREMIO-Plus 2G
Control valve in 3-way-form with electric actuator ARI-PREMIO (3-way mixing valve / 3-way diverting valve)

Fig. 450 Fig. 451

Actuator data 2,2 - 5 kN 12 - 25 kN

A (mm) 171 210
B (mm) 156 184
C (mm) 50 90
Ø D1 (mm) 90 130
X (mm) 150 200
Further technical data of the actuator: refer to data sheet ARI-PREMIO/PREMIO-Plus 2G

Heights and weights

DN 15 20 25 32 40 50 65 80 100 125 150

Fig. 450 2,2 kN H (mm) 559 559 563 589 595 593 629 645 664 731 --
PN16 (kg) 11 12 13 15 18 22 29 35 52 73 --
PN40 (kg) 11 12 13 16 20 24 31 38 56 100 --
5 kN H (mm) 559 559 563 589 595 593 629 645 664 731 793
PN16 (kg) 12 13 14 16 20 23 30 37 53 74 101
PN40 (kg) 12 13 14 17 21 25 32 39 57 101 144
12 kN H (mm) -- -- 737 763 769 767 803 819 838 885 947
15 kN PN16 (kg) -- -- 18 20 24 27 34 41 57 78 105
PN40 (kg) -- -- 18 21 25 29 36 43 61 105 148
25 kN H (mm) -- -- -- -- -- -- -- -- -- 885 947
PN16 (kg) -- -- -- -- -- -- -- -- -- 79 106
PN40 (kg) -- -- -- -- -- -- -- -- -- 106 149

Fig. 451 2,2 kN H (mm) 744 744 748 774 764 758 864 877 893 -- --
PN16 (kg) 14 15 16 18 23 26 35 45 63 -- --
PN40 (kg) 14 15,3 16,6 19,2 24,5 28 37,9 48,7 68 -- --
5 kN H (mm) 744 744 748 774 764 758 864 877 893 1086 1119
PN16 (kg) 15 16 17 19 24 27 36 46 64 84 111
PN40 (kg) 15 16 18 20 25,6 29 39 50 69 112 155
12 kN H (mm) -- -- 922 948 938 932 1038 1051 1067 1240 1273
15 kN PN16 (kg) -- -- 21 23 28 31 40 50 68 88 115
PN40 (kg) -- -- 22 24 30 33 43 54 73 116 159
25 kN H (mm) -- -- -- -- -- -- -- -- -- 1240 1273
PN16 (kg) -- -- -- -- -- -- -- -- -- 89 116
PN40 (kg) -- -- -- -- -- -- -- -- -- 117 160

Further dimensions refer to pages 16 - 17.

10 Edition 08/17 - Data subject to alteration - Regularly updated data on www.ari-armaturen.com!

 ARI-STEVI® 450 / 451 (DN15-150)
Closing pressures: Electric actuator ARI-PREMIO / PREMIO-Plus 2G
max. permissible closing pressures on flow-to-open P2 = 0.
Observe pressure-temperature-limits, refer to page 2.
DN 15 20 25 32 40 50 65 80 100 125 150
standard (m3/h) 4 6,3 10 16 25 40 63 100 160 250 320
Kvs-value
reduced (m3/h) 2,5 4 6,3 10 16 25 40 63 100 160 250
max. diff. pressure 1) (bar) 40 30 25 15
Mixing function Seat-Ø A/B (mm) 21/20 21/25 27/27 31/32 41/40 51/50 66/60 81/75 101/95 120/120 140/140
Travel (mm) 20 30 50
I. (bar) 40 35,9 30,8 21,7 12,8 8 4,3 2,7 1,5
Closing pressure II. (bar) 40 33,7 28,8 20,2 11,9 7,4 3,9 2,3 1,3
2,2 kN III. (bar) 30,7 30,1 27,1 19,1 10,6 6,5 3,6 2,2 1,2
Operating time (s) 53 79
Operating speed 2) (mm/s) 0,38
I. (bar) 40 40 40 33,2 21,3 12,3 8 4,9 3,4 2,4
Closing pressure II. (bar) 40 40 40 32,3 20,7 11,9 7,6 4,7 3,2 2,3
5 kN III. (bar) 40 40 40 40 31 19,8 11,6 7,5 4,6 3 2,1
Operating time (s) 53 79 132
Operating speed (mm/s) 0,38
I. (bar) 40 40 32,3 21,2 13,5 9,5 6,9
Closing pressure II. (bar) 40 40 31,8 20,9 13,3 9,3 6,8
12 kN III. (bar) 40 40 31,6 20,7 13,2 9,1 6,6
Operating time (s) 53 79 132
Operating speed (mm/s) 0,38
I. (bar) 40 26,9 17,2 12,1 8,8
Closing pressure II. (bar) 40 26,6 17 11,9 8,7
15 kN III. (bar) 40 26,4 16,9 11,7 8,5
Operating time (s) 79 132
Operating speed (mm/s) 0,38
I. (bar) 20,8 15,2
Closing pressure II. (bar) 20,6 15,1
25 kN III. (bar) 20,4 14,9
Operating time (s) 132
Operating speed (mm/s) 0,38

15 20 25 32
DN 40 50 65 80 100 125 150
mixing plug for diverting
standard (m3/h) 4 6,3 10 16 14 25 45 60 95 170 200
Kvs-value
reduced (m3/h) 2,5 4 6,3 10
max. diff. pressure 1) (bar) 40 30 25 15
Seat-Ø A/B (mm) 21/20 21/25 27/27 31/32 40/40 50/50 60/60 75/75 90/90 105/105 125/125
Diverting function
Travel (mm) 20 30
I. (bar) 25,7 18 15,4 10,8 13,4 8,2 5,4 3,2 2 1,3
Closing pressure II. (bar) 24,1 16,8 14,4 10,1 12,5 7,6 4,8 2,8 1,8 1,1
2,2 kN III. (bar) 15,4 15 13,6 9,5 11,1 6,8 4,5 2,6 1,6
Operating time (s) 53 79
Operating speed 2) (mm/s) 0,38
I. (bar) 40 40 38,5 27,4 34,6 21,9 15 9,4 6,4 4,5 3,1
Closing pressure II. (bar) 40 40 37,5 26,7 33,7 21,3 14,4 9 6,1 4,3 2,9
5 kN III. (bar) 40 40 36,6 26,1 32,3 20,4 14,1 8,8 6 4 2,7
Operating time (s) 53 79
Operating speed (mm/s) 0,38
I. (bar) 40 40 40 40 38,9 24,8 17,1 12,3 8,6
Closing pressure II. (bar) 40 40 40 40 38,4 24,4 16,9 12,1 8,5
12 kN III. (bar) 40 40 40 40 38 24,2 16,7 11,9 8,3
Operating time (s) 53 79
Operating speed (mm/s) 0,38
I. (bar) 40 31,4 21,7 15,7 11
Closing pressure II. (bar) 40 31,1 21,5 15,5 10,9
15 kN III. (bar) 40 30,8 21,3 15,3 10,7
Operating time (s) 79
Operating speed (mm/s) 0,38
I. (bar) 26,9 19,0
Closing pressure II. (bar) 26,7 18,8
25 kN III. (bar) 13,4 18,7
Operating time (s) 79
Operating speed (mm/s) 0,38
Further operating speeds: refer to data sheet ARI-PREMIO/PREMIO-Plus 2G
I. Fig. 450: PTFE-V-ring unit / EPDM-sealing
Travel [mm]
II. Fig. 450: PTFE- / pure graphite-packing Operating time [s]=
III. Fig. 451: Bellows seal Operating speed [mm/s]
1) max. differential pressure drop
2) Based on a frequency of 50Hz the control speed and power consumption of the synchronous motors PREMIO 2,2kN are 20% higher at frequency of 60 Hz.

Edition 08/17 - Data subject to alteration - Regularly updated data on www.ari-armaturen.com! 11

 ARI-STEVI® 450 / 451 (DN25-150)
Electric actuator Auma SAR (MATIC)
Control valve in straightway form with electric actuator AUMA (3-way mixing valve / 3-way diverting valve)

Fig. 450 Fig. 451

Actuator data SAR 07.2 SAR 07.6 SAR 10.2 SAR 14.2
A (mm) 265 283 389
B (mm) 249 254 336
H1 (AUMA MATIC) (mm) 130 182
Supply voltage: 400V 50Hz 3~ (Other voltages on request)
Technical data for actuator refer to price list.

Heights and weights

DN 25 32 40 50 65 80 100 125 150

Fig. 450 SAR 07.2 H (mm) 633 659 665 663 699 715 734 781 843
SAR 07.6 PN16 (kg) 34 37 40 46 52 59 75 96 124
PN40 (kg) 35 38 42 47 54 61 79 124 166
SAR 10.2 H (mm) -- -- -- -- 701 717 736 783 845
PN16 (kg) -- -- -- -- 55 61 78 99 126
PN40 (kg) -- -- -- -- 57 64 82 126 169
SAR 14.2 H (mm) -- -- -- -- -- -- -- 880 913
PN16 (kg) -- -- -- -- -- -- -- 148 172
PN40 (kg) -- -- -- -- -- -- -- 157 189

Fig. 451 SAR 07.2 H (mm) 818 844 834 828 934 947 963 1136 1169
SAR 07.6 PN16 (kg) 38 40 45 50 59 69 86 106 134
PN40 (kg) 39 41 46 51 61 72 91 134 177
SAR 10.2 H (mm) -- -- -- -- -- -- -- 1138 1171
PN16 (kg) -- -- -- -- -- -- -- 109 136
PN40 (kg) -- -- -- -- -- -- -- 137 179
SAR 14.2 H (mm) -- -- -- -- -- -- -- 1439 1472
PN16 (kg) -- -- -- -- -- -- -- 173 199
PN40 (kg) -- -- -- -- -- -- -- 184 217

For version with AUMA SAR Ex other heights.

Further dimensions refer to pages 16 - 17.

12 Edition 08/17 - Data subject to alteration - Regularly updated data on www.ari-armaturen.com!

 ARI-STEVI® 450 / 451 (DN25-150)
Closing pressures: Electric actuator Auma SAR (MATIC)
max. permissible closing pressures on flow-to-open P2 = 0.
Observe pressure-temperature-limits, refer to page 2.

Fig. 450 DN 25 32 40 50 65 80 100 125 150

standard (m3/h) 10 16 25 40 63 100 160 250 320
Kvs-value
reduced (m3/h) 6,3 10 16 25 40 63 100 160 250
max. diff. pressure 1) (bar) 40 30 25 15
Mixing function Seat-Ø A/B (mm) 27/27 31/32 41/40 51/50 66/60 81/75 101/95 120/120 140/140
Travel (mm) 20 30 50
shut off (bar) 40 40 40 40 40 29,7 19 13,4 9,7
Closing pressure I./II.
SAR 07.2 controlling 2) (bar) 40 40 40 36,5 21,4 14 8,8 6,1 4,4
Output drive
Torque (Nm) 15 15 15 20 30 30 30 30 30
Form A
TR 20 x 4 - LH Operating time (50 Hz) (s) 54 56 94
Output drive (rpm) 5,6 8 8
shut off (bar) 40 40 40 26,9 18,9 13,8
Closing pressure I./II.
SAR 07.6 controlling 2) (bar) 40 30,5 20 12,8 8,9 6,5
Output drive
Torque (Nm) 30 40 60 60 60 60
Form A
TR 26 x 5 - LH Operating time (50 Hz) (s) 43 64 55
Output drive (rpm) 5,6 5,6 11
shut off (bar) 40 40 31,6 32,3 23,7
Closing pressure I./II.
SAR 10.2 controlling 2) (bar) 40 40 26,9 18,9 13,8
Output drive
Torque (Nm) 60 60 70 100 100
Form A
TR 26 x 5 - LH Operating time (50 Hz) (s) 64 55
Output drive (rpm) 5,6 11
shut off (bar) 40 40
Closing pressure II.
SAR 14.2 controlling 2) (bar) 31,3 22,9
Output drive
Torque (Nm) 175 225
Form A
TR 30 x 6 - LH Operating time (50 Hz) (s) 63
Output drive (rpm) 8

Fig. 451 DN 25 32 40 50 65 80 100 125 150

standard (m3/h) 10 16 25 40 63 100 160 250 320
Kvs-value
reduced (m3/h) 6,3 10 16 25 40 63 100 160 250
max. diff. pressure 1) (bar) 40 30 25 15
Mixing function Seat-Ø A/B (mm) 27/27 31/32 41/40 51/50 66/60 81/75 101/95 120/120 140/140
Travel (mm) 20 30 50
shut off (bar) 40 40 40 40 40 29,5 18,9 13,2 9,6
Closing pressure III.
SAR 07.2 controlling 2) (bar) 40 40 40 35,7 21,1 13,8 8,7 5,9 4,3
Output drive
Torque (Nm) 15 15 15 20 30 30 30 30 30
Form A
TR 20 x 4 - LH Operating time (50 Hz) (s) 54 56 94
Output drive (rpm) 5,6 8 8
shut off (bar) 40 40 30,8 19,7 18,8 13,7
Closing pressure III.
SAR 07.6 controlling 2) (bar) 40 30,2 19,8 12,6 8,7 6,3
Output drive
Torque (Nm) 30 40 45 45 60 60
Form A
TR 26 x 5 - LH Operating time (50 Hz) (s) 43 64 55
Output drive (rpm) 5,6 5,6 11
shut off (bar) 28,8 21,1
Closing pressure III.
SAR 10.2 controlling 2) (bar) 18,8 13,7
Output drive
Torque (Nm) 90 90
Form A
TR 26 x 5 - LH Operating time (50 Hz) (s) 55
Output drive (rpm) 11
shut off (bar) 40 38,9
Closing pressure III.
SAR 14.2 controlling 2) (bar) 31,2 22,9
Output drive
Torque (Nm) 175 200
Form A
TR 30 x 6 - LH Operating time (50 Hz) (s) 63
Output drive (rpm) 8

I. Fig. 450: PTFE-V-ring unit / EPDM-sealing; II. Fig. 450: PTFE- / pure graphite-packing; III. Fig. 451: Bellows seal
1) max. differential pressure drop
2) Restrictions through max. permissible torque of the actuator at controlling operation.

Edition 08/17 - Data subject to alteration - Regularly updated data on www.ari-armaturen.com! 13

 ARI-STEVI® 450 / 451 (DN25-150)
Closing pressures: Electric actuator AUMA SAR
max. permissible closing pressures on flow-to-open P2 = 0.
Observe pressure-temperature-limits, refer to page 2.

25 32
Fig. 450 DN mixing plug for 40 50 65 80 100 125 150
diverting
standard (m3/h) 10 16 14 25 45 60 95 170 200
Kvs-value
reduced (m3/h) 6,3 10
max. diff. pressure 1) (bar) 40 30 25 15
Seat-Ø A/B (mm) 27/27 31/32 40/40 50/50 60/60 75/75 90/90 105/105 125/125
Diverting function
Travel (mm) 20 30
shut off (bar) 40 40 40 40 40 34,7 24 17,4 12,2
SAR 07.2 Closing pressure I./II.
controlling 2) (bar) 40 40 40 37,6 25,8 16,4 11,2 8 5,6
Output drive Torque (Nm) 15 15 15 20 25 30 30 30 30
Form A
TR 20 x 4 - LH Operating time (s) 54 56
Output drive (rpm) 5,6 8
shut off (bar) 40 40 40 33,9 24,6 17,3
SAR 07.6 Closing pressure I./II.
controlling 2) (bar) 40 36,8 23,4 16,2 11,6 8,1
Output drive Torque (Nm) 30 35 50 60 60 60
Form A
TR 26 x 5 - LH Operating time (s) 43 64
Output drive (rpm) 5,6 5,6
shut off (bar) 40 40 39,8 40 29,5
SAR 10.2 Closing pressure I./II.
controlling 2) (bar) 40 40 33,9 24,6 17,3
Output drive Torque (Nm) 60 60 70 100 100
Form A
TR 26 x 5 - LH Operating time (s) 64
Output drive (min -2) 5,6
shut off (bar) 40 40
SAR 14.2 Closing pressure II.
controlling 2) (bar) 40 28,6
Output drive
Torque (Nm) 120 175
Form A
TR 30 x 6 - LH Operating time (s) 38
Output drive (rpm) 8

25 32
Fig. 451 DN mixing plug for 40 50 65 80 100 125 150
diverting
Kvs-value (m3/h) 10 16 14 25 45 60 95 170 200
6,3 10
max. diff. pressure 1) (bar) 40 30 25 15
Seat-Ø A/B (mm) 27/27 31/32 40/40 50/50 60/60 75/75 90/90 105/105 125/125
Diverting function
Travel (mm) 20 30
shut off (bar) 40 40 40 40 40 34,5 23,9 17,1 12
SAR 07.2 Closing pressure III.
controlling 2) (bar) 40 40 40 36,7 25,5 16,1 11,1 7,8 5,4
Output drive Torque (Nm) 15 15 15 20 25 30 30 30 30
Form A
TR 20 x 4 - LH Operating time (s) 54 56
Output drive (min -2) 5,6 8
shut off (bar) 40 40 35,9 24,9 24,3 17,1
SAR 07.6 Closing pressure III.
controlling 2) (bar) 40 36,4 23,2 16 11,4 7,9
Output drive Torque (Nm) 30 35 45 45 60 60
Form A
TR 26 x 5 - LH Operating time (s) 43 64
Output drive (min -2) 5,6 5,6
shut off (bar) 37,3 26,3
SAR 10.2 Closing pressure III.
controlling 2) (bar) 24,3 17,1
Output drive Torque (Nm) 90 90
Form A
TR 26 x 5 - LH Operating time (s) 64
Output drive (min -2) 5,6
shut off (bar) 40 35,9
SAR 14.2 Closing pressure III.
controlling 2) (bar) 40 28,5
Output drive Torque (Nm) 120 150
Form A
TR 30 x 6 - LH Operating time (s) 38
Output drive (min -2) 8

I. Fig. 450: PTFE-V-ring unit / EPDM-sealing; II. Fig. 450: PTFE- / pure graphite-packing; III. Fig. 451: Bellows seal
1) max. differential pressure drop
2) Restrictions through max. permissible torque of the actuator at controlling operation.

14 Edition 08/17 - Data subject to alteration - Regularly updated data on www.ari-armaturen.com!

 ARI-STEVI® 450 / 451 (DN25-150)
Closing pressures: Electric actuator AUMA SAR

Edition 08/17 - Data subject to alteration - Regularly updated data on www.ari-armaturen.com! 15

 ARI-STEVI® 450 / 451 (DN15-150)
Dimensions: Standard design
Control valve in 3-way-form

Fig. 450 Fig. 451

DN15-150 DN15-150
(e.g.: DP32-34; PREMIO 2,2-25kN; AUMA 07.2-10.2) (e.g.: DP32-34; PREMIO 2,2-25kN; AUMA 07.2-10.2)

DN 15 20 25 32 40 50 65 80 100 125 150

Dimensions
Fig. 450 (mm) M10 M14x1,5 M16x1,5
M
Fig. 451 (mm) M12 M16
Fig. 450 (mm) 111 111 115 141 147 145 181 197 216 263 325
H1
Fig. 451 (mm) 296 296 300 326 316 310 416 429 445 618 651
H2 Fig. 450 / Fig. 451 (mm) 83
H3 Fig. 450 / Fig. 451 (mm) 65 70 75 80 90 100 120 130 150 200 210
A Fig. 450 / Fig. 451 (mm) 100
n x ØB Fig. 450 / Fig. 451 (mm) 2 x 16

Face-to-face dimension FTF series 1 according to DIN EN 558

L (mm) 130 150 160 180 200 230 290 310 350 400 480

Flanges acc. to DIN EN 1092-1/-2 Flange holes / -thickness tolerances acc. to DIN 2533/2544/2545
PN16 (mm) 220 250 285
ØD 95 105 115 140 150 165 185 200
PN25 / 40 (mm) 235 270 300
PN16 (mm) 180 210 240
ØK 65 75 85 100 110 125 145 160
PN25 / 40 (mm) 190 220 250
PN16 (mm) 4 x 14 4 x 18 8 x 18 8 x 22
n x Ød
PN25 / 40 (mm) 4 x 14 4 x 18 8 x 18 8 x 22 8 x 26

Weights
PN16 (JL 1040) (kg) 5,1 6,1 7,1 9,7 13 16,8 23,5 30 46,5 67,4 94,8
Fig. 450
PN40 (1.0619+N) (kg) 5,6 6,7 7,7 10,6 14,2 18,3 25,6 32,6 50,6 94,9 137,6
PN16 (JL 1040) (kg) 8,1 9,1 10,3 12,7 17,5 20,7 29,8 39,7 57,4 77,4 104,8
Fig. 451
PN40 (1.0619+N) (kg) 8,8 9,9 11,2 13,8 19,1 22,6 32,5 43,3 62,6 105,4 148,1

max. permissible thrust

Fig. 450 (kN) 12,7 29,5 40,6
Fig. 451 (kN) 18,2 37

16 Edition 08/17 - Data subject to alteration - Regularly updated data on www.ari-armaturen.com!

 ARI-STEVI® 450 / 451 (DN125-150)
Dimensions: Stem connection M27
Control valve in 3-way-form

Fig. 450 Fig. 450

DN125-150 DN125-150
(e.g.: DP34T-34Tri) (e.g.: DP35; AUMA 14.2-14.6)

DN 125 150

Dimensions
M Fig. 450 / 451 (mm) M27
Fig. 450 (mm) 283 316
H1
Fig. 451 (mm) 690 723
Fig. 450 (mm) 98
H2
Fig. 451 (mm) 185
H3 Fig. 450/451 (mm) 200 210
H4 Fig. 450 (mm) 658 961
H5 Fig. 450 (mm) 130
A Fig. 450 (mm) 100
n x ØB Fig. 450 (mm) 2 x 16
A1 Fig. 450 / 451 (mm) 150
n x ØB1 Fig. 450 / 451 (mm) 4 x 16
A2 Fig. 450 (mm) 170
M1 Fig. 450 (mm) M20
T Fig. 450 (mm) 32

Face-to-face dimension FTF series 1 according to DIN EN 558

L (mm) 400 480
Flanges acc. to DIN EN 1092-1/-2
PN16 (mm) 250 285
ØD
PN25 / 40 (mm) 270 300
PN16 (mm) 210 240
ØK
PN25 / 40 (mm) 220 250
PN16 (mm) 8 x 18 8 x 22
n x Ød
PN25 / 40 (mm) 8 x 26 8 x 26

Weights
PN16 (JL 1040) (kg) 82 106
Fig. 450
PN40 (1.0619+N) (kg) 91 123
PN16 (JL 1040) (kg) 107 133
Fig. 451
PN40 (1.0619+N) (kg) 118 151

max. permissible thrust Fig. 451

Fig. 450 (kN) 112 DN125-150
Fig. 451 (kN) 70 (e.g.: DP34T-35; AUMA 14.2)

Edition 08/17 - Data subject to alteration - Regularly updated data on www.ari-armaturen.com! 17

 ARI-STEVI® 450 (DN15-150)
Parts: Standard design

I. EPDM-sealing

I. PTFE-V-ring unit Diverting plug DN40 upwards II. PTFE- / pure graphite-packing

Pos. Sp.p. Description Fig. 12.450 Fig. 22.450 / Fig. 23.450 Fig. 34.450 / Fig. 35.450 Fig. 55.450
1 Body EN-GJL-250 , EN-JL1040 EN-GJS-400-18U-LT, EN-JS1049 GP240GH+N, 1.0619+N GX5CrNiMo19-11-2, 1.4408
1.2 Seat ring X20Cr13+QT, 1.4021+QT --
2 x Seat ring X20Cr13+QT, 1.4021+QT X6CrNiMoTi17-12-2, 1.4571
3 x Plug X20Cr13+QT, 1.4021+QT X6CrNiMoTi17-12-2, 1.4571
4 x Hexagon nut 8-A2B --
5 x Spindle X20Cr13+QT, 1.4021+QT X6CrNiMoTi17-12-2, 1.4571
7 Mounting bonnet EN-GJS-400-18U-LT, EN-JS1049 GP240GH+N, 1.0619+N GX5CrNiMo19-11-2, 1.4408
8 Giude bushing X20Cr13+QT, 1.4021+QT (hardened) X6CrNiMoTi17-12-2, 1.4571
9 x Gasket Pure graphite (CrNi laminated with graphite)
10 Stud 25CrMo4, 1.7218 A4 - 70
11 Hexagon nuts C35E, 1.1181 A4
12 V-ring unit PTFE
refer to Pos. 100

14 Washer X5CrNi18-10, 1.4301

15 Compression spring X10CrNi18-8, 1.4310
Set:

16 Bush PTFE (strengthened)

17 Gasket Cu / Soft iron X6CrNiMoTi17-12-2, 1.4571
18 Scraper PTFE (strengthened)
13/49 x Packing ring PTFE or Pure graphite
19 x Screw joint X8CrNiS18-9, 1.4305
31 x Plug X20Cr13+QT, 1.4021+QT X6CrNiMoTi17-12-2, 1.4571
32 x Distance bush X5CrNi18-10, 1.4301
38 x Stem adapter X20Cr13+QT, 1.4021+QT X6CrNiMoTi17-12-2, 1.4571
40 x Plug X20Cr13+QT, 1.4021+QT X6CrNiMoTi17-12-2, 1.4571
41 x Spindle X20Cr13+QT, 1.4021+QT X6CrNiMoTi17-12-2, 1.4571
42 x Screw joint X8CrNiS18-9, 1.4305
60 x Hexagon nut -- A4
61 Lock washer pair -- A4
Stem sealings Fig. 450
100 x V-ring unit (set) Set of: Pos. 12, 14, 15, 16, 17, 18
120 x EPDM-sealing, cpl. EPDM / X20Cr13+QT, 1.4021+QT / X8CrNiS18-9, 1.4305
13/49 x Packing ring PTFE
13/49 x Packing ring Pure graphite
└ Spare parts

18 Edition 08/17 - Data subject to alteration - Regularly updated data on www.ari-armaturen.com!

 ARI-STEVI® 451 (DN15-150)
Parts: Standard design

III. Stainless steel-bellow

with V-ring unit

III. Stainless steel bellows seal

III. PTFE-packing / Pure graphite-packing Diverting plug DN40 upwards with EPDM-sealing

Pos. Sp.p. Description Fig. 12.451 Fig. 22.451 / Fig. 23.451 Fig. 34.451 / Fig. 35.451 Fig. 55.451
1 Body EN-GJL-250 , EN-JL1040 EN-GJS-400-18U-LT, EN-JS1049 GP240GH+N, 1.0619+N GX5CrNiMo19-11-2, 1.4408
1.2 Seat ring X20Cr13+QT, 1.4021+QT --
2 x Seat ring X20Cr13+QT, 1.4021+QT X6CrNiMoTi17-12-2, 1.4571
3 x Plug X20Cr13+QT, 1.4021+QT X6CrNiMoTi17-12-2, 1.4571
4 x Hexagon nut 8-A2B --
6 x Clamping sleeve X10CrNi18-8, 1.4310 A2
9 x Gasket Pure graphite (CrNi laminated with graphite)
10 Stud 25CrMo4, 1.7218 A4 - 70
11 Hexagon nuts C35E, 1.1181 A4
2001 Bellows housing EN-GJS-400-18U-LT, EN-JS1049 GP240GH+N, 1.0619+N GX5CrNiMo19-11-2, 1.4408
2002 Mounting bonnet EN-GJS-400-18U-LT, EN-JS1049 GP240GH+N, 1.0619+N GX5CrNiMo19-11-2, 1.4408
2003 x Stem- / Bellows unit X20Cr13+QT, 1.4021+QT / X6CrNiTi18-10, 1.4541 X6CrNiMoTi17-12-2, 1.4571
2004 Giude bushing X20Cr13+QT, 1.4021+QT (hardened) X6CrNiMoTi17-12-2, 1.4571
2005 Giude bushing X20Cr13+QT, 1.4021+QT (hardened) X6CrNiMoTi17-12-2, 1.4571
2006 x Gasket Pure graphite (CrNi laminated with graphite)
2007 Stud 25CrMo4, 1.7218 A4 - 70
2008 Hexagon nuts C35E, 1.1181 A4
2010 x Packing ring Pure graphite
2012 x Washer X5CrNi18-10, 1.4301
2017 x Screw joint X8CrNiS18-9, 1.4305
2012 Washer X5CrNi18-10, 1.4301
refer to Pos. 100

2018 Compression spring X10CrNi18-8, 1.4310

2021 V-ring unit PTFE
Set:

2024 Screw joint X8CrNiS18-9, 1.4305

2025 Scraper PTFE
2026 Gasket X6CrNiMoTi17-12-2, 1.4571
31 x Plug X20Cr13+QT, 1.4021+QT X6CrNiMoTi17-12-2, 1.4571
32 x Distance bush X5CrNi18-10, 1.4301
37 x Stem adapter X20Cr13+QT, 1.4021+QT X6CrNiMoTi17-12-2, 1.4571
38 x Stem adapter X20Cr13+QT, 1.4021+QT X6CrNiMoTi17-12-2, 1.4571
40 x Plug X20Cr13+QT, 1.4021+QT X6CrNiMoTi17-12-2, 1.4571
41 x Spindle X20Cr13+QT, 1.4021+QT X6CrNiMoTi17-12-2, 1.4571
60 x Hexagon nut -- A4
61 Lock washer pair -- A4
Stem sealings Fig. 451
2010 x Packing ring Pure graphite
100 x V-ring unit (set) Set of: Pos. 2012 - 2026
120 x EPDM-sealing, cpl. EPDM / X20Cr13+QT, 1.4021+QT / X8CrNiS18-9, 1.4305
└ Spare parts

Edition 08/17 - Data subject to alteration - Regularly updated data on www.ari-armaturen.com! 19

 ARI-STEVI® 450 / 451 (DN15-150)
Sizing

myValve® - Your Valve Sizing-Program.

myValve® is a powerful software tool that not only helps you size your system components; it also gives you instant access to all other data about the selected product, such
as order information, spare parts drawings, operating instructions, data sheets, etc., whenever you need it.

Contents: Module ARI-control valves STEVI-calculation

- Sizing (calculation of flow quantity Kv, volume flow Q, pressure drop Δp, sound level and selecting the valve.)

Media: Integrated media-databank (more than 160 media) with conditions:

- Vapours / gases
- Steam (saturated and superheated)
- Liquids

Special features: - Project administration of the calculation and product data incl. spare part drawings concerning to project and tag number.
- Direct output or calculation and product data in PDF format.
- Product data could be taken for a direct order.
- SI- and ANSI-units with direct conversion to another databank.
- Settings with over pressure or absolute pressure.
- All ARI valves are integrated in a databank.
- Direct access concerning to the product on data sheets, operating instructions, pressure-temperature-diagram and spare part
drawings
- Operation in company networks possible (no complex installations on individually PC‘s necessary).
- Extensive catalogue extending over several product groups.

System Requirements: Windows operating systems, Linux, etc.

Technology for the Future.

GERMAN QUALITY VALVES
ARI-Armaturen Albert Richter GmbH & Co. KG, D-33750 Schloß Holte-Stukenbrock,
Tel. +49 52 07 / 994-0, Telefax +49 52 07 / 994-158 or 159 Internet: http://www.ari-armaturen.com E-mail: info.vertrieb@ari-armaturen.com

20 Edition 08/17 - Data subject to alteration - Regularly updated data on www.ari-armaturen.com!