Spirax Sarco 37D, Инструкция по установке и обслуживанию

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IM-P102-04 CTLS Issue 7
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To clean the strainer
Isolate the valve and zero the pressure. If the plant is
still in operation through a bypass valve or if the medium
surrounding the bulb is hot, withdraw the sensor bulb
and allow it to cool down, otherwise the control system
may be strained.
16. Unscrew the unions and release pipework.
17. Unscrew the nuts.
18. Remove the pilot valve housing complete with the
adjustment head.
19. Remove the screen and clean.
20. Ensure the gasket faces are clean.
21.
Check that the main valve return spring is in position.
22. Fit a new gasket.
23. Replace the screen.
24. Assemble the pilot valve housing complete with the
spring housing assembly and tighten the nuts to the
torques shown in Table 1.
25.
Refit the pipework and retighten the unions to ensure
a tight seal. Bring the valve back into commission by
following as many steps as necessary in Section 3.
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