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Control systems Self-acting controls
Control system selection The control system consists of the sensor, capillary tube and actuator. Tables 5 and 6 show which control systems are compatible with each valve: 11. From Table 7, select a temperature range which allows adjustment on both sides of the control point. 12. From Table 7, choose the configuration of the control system to suit the application. 13. From Table 7, choose the length of capillary tube. 14. Choose any ancillaries (pockets, mounting brackets etc.) from Table 8. Typical order information 1 off Spirax Sarco self-acting temperature control comprising: - DN20 KA43 control valve flanged to EN 1092 PN40, - SA121 control system, range 2, - 2 m capillary tube length, - Stainless steel pocket.
Table locations Table 1 - Valve sizing for heating applications using steam
Page 3
4.5 2
Table 2 - Valve sizing for heating applications using water
Page 4
Table 3 - Valve sizing for cooling applications using water
Page 5
Table 4 - Pressure/temperature limits for different valve materials
Page 6
Table 5 - Normally open valves for heating applications
Page 7
Table 6 - Normally closed valves for cooling applications
Page 10
Table 7 - Control system selection
Page 12
Table 8 - Control system ancillaries
Pages 13
TI-S21-07 CTLS Issue 6
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2-Port Self-acting Temperature Control Valve Selection for Heating and Cooling Applications
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