44
Control systems Control valves
Pressure/temperature limits
Pressure psi g
0
29
58
87
116 145 174 203 232
392 338 302 212 122
Steam saturation curve
32 14
Pressure bar g
The product must not be used in this region. Viton (V) stem seals must be selected for use in this region.
Body design conditions
PN16
Maximum design pressure
16 bar g @ 120 °C
232 psi g @248 °F
Maximum design temperature
200 °C @ 14 bar g
392 °F @ 203 psi g
4.1 130
Minimum design temperature
-20 °C
-4 °F
Maximum operating temperature
Viton (FKM) (V)
170 °C
338 °F
Minimum operating temperature Note: For lower operating temperatures consult Spirax Sarco.
-10 °C
14 °F
Maximum differential pressure
See pages 7 to 9
Designed for a maximum cold hydraulic test pressure of:
24 bar g
348 psi g
Kv values (SB and SA models)
K v by valve size and trim reduction
Valve size
DN15 (½")
DN20 (¾")
DN25 (1")
DN32 (1¼")
DN40 (1½")
DN50 (2")
DN65 (2½")
DN80 (3")
DN100 (4")
Flow characteristic
20 mm (0.79")
30 mm (1.2")
Travel
Standard
4
6.3
10
16
25
36
63
100
160
Reduction 1 Reduction 2 Reduction 3
-
4
6.3
10
16
25
36
63
100
Equal percentage and linear
-
-
4
6.3
10
16
25
36
63
-
-
-
4
6.3
10
16
25
36
Micro-flow trim for all valves ≤ DN25 (1") Micro-flow trim Travel
20 mm (0.79") ¼" (6.4 mm)
1/8 " (3.2 mm)
3/16 " (4.8 mm)
¼" (6.4 mm)
3/8 " (9.5 mm)
Trim size
Linear characteristic Kv
0.4
0.63
1.0
1.6
2.5
For conversion: Kv = Cv (US) x 0.855 Cv(UK) = Cv (US) x 0.833
TI-P183-02 CTLS Issue 10
Page 6 of 19
Steri-trol Aseptic Service 'S' series Two-port Pneumatic Control Valves - DN15 (½") to DN100 (4")
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