MKS 253B-1-2CF-1, Instruction Manual

Page: 41 / 54

Appendix A: Product Specifications Valve Specifications
33
Appendix A: Product Specifications
Valve Specifications
CE Mark Compliance
Electromagnetic Compatibility
2
Machinery
EMC Directive 89/336/EEC
Machinery Directive 89/392/EEC
Differential Pressure Across Valve 1 atm. (15 psig) max.
Driver/Gear Assembly Width 3.75” square (95 mm)
External Leakage at Shaft Seal 1 x 10
-7
scc/sec He
Materials Exposed to Process 316L SS, Viton
®
**
Heater Operating Temperature*
80
°
to 90
°
C (176
°
to 194
°
F) for 20
°
to 40
°
C
(68
°
to 104
°
F) ambient
Power Input*
(for valve body heater) ±15 VDC, 1 Amp (30 Watts) nominal, user-
supplied
Note: DC input is used for safety purposes.
Resolution Standard: 1/10,000
Fast Motor Option: 1/2800***
Shaft Seal Viton**
Speed (open to close) Standard: 7.5 sec
Optional: < 2 sec***
Valve Body Operating Temperature 0° to 90° C (32° to 194° F) max.
Valve Motor Ambient Operating Temperature 0° to 70° C (32° to 158° F) max.
Warm-up Time* 1 hour to 80° C (176° F),
2 hours to steady state
* Applicable only to KF style ISO valves that are equipped with the heater option.
** Where Viton is used, other materials are available; consult factory.
*** Fast Motor Option offered on select sizes; consult factory for ordering code.
2
An overall metal braided shielded cable, properly grounded at both ends, is required during use.