CRYOGENIC
Type 27521 - Pneumatic Actuator - Control Valve
Pneumatic Actuators for Control Valves

Actuator - air to open,
spring to close
maximum air pressure for operation 6.0 bar g
"cleaned and degreased for oxygen service"
Ambient temperature limit:

-40°C / -40°F (233K) up to +80°C / 176°F (353K)


The differential pressures are based on the flow direction of the valve. Differential pressures against the flow direction have to be requested separately.

 
Type 27521 - Pneumatic Actuator - Control Valve
 

Materials

DIN EN

ASTM

1 Body 1.4571 A 240 Grade 316Ti
2 Body 1.4571 A 240 Grade 316Ti
3 Diaphragm EPDM
4 Springs 1.7102 AISI 9254
5 Actuator stem 1.4404 A 276 Grade 316L
6 Coupling 1.4571 A 240 Grade 316Ti
 
Type 27521 - Pneumatic Actuator - Control Valve
 

Overview - required actuator sizes for differential pressures

DNDifferential pressure in bar
1.0
-
2.0
2.1
-
4.0
4.1
-
6.0
6.1
-
8.0
8.1
-
10.0
10.1
-
12.0
12.1
-
15.0
15.1
-
17.0
17.1
-
19.0
19.1
-
22.0
22.1
-
25.0
25.1
-
29.0
29.1
-
35.0
35.1
-
39.0
39.1
-
42.0
42.1
-
50.0
10BBBBBBBBBBBBBBBB
15BBBBBBBBBBBBBBBB
20BBBBBBBBBBBBBBBB
25BBBBBBBBBBBBBBBB
32BBBBBBBBBBCCCCCC
40BBBBBBBCCCCCCCC-
50BBBBBCCCCCCCC---
65CCCCCC----------
80CCC-------------
100CC--------------
150----------------


Code in TablePart No. Actuator
B27521.35B6.6GPO
C27521.60A6.6GPO



Type 27521Technical data
Part No. Actuator 27521
.35B6.6GPO.60A6.6GPO
Diameter ActuatorM210310
HeightH276309
HeightH1136166
ThreadG1/4'' NPT1/4'' NPT
Diaphragm areacm²280530
Spring ragebar0.8 - 3.00.8 - 2.8
Minimum air pressurebar3.23.0
Regulating liftmm3540
Weightca. kg5.012.5
Dimensions in mm.