Spirax Sarco 37D, Installation And Maintenance Instructions Manual

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IM-P102-04 CTLS Issue 7
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48. Thoroughly clean the lower diaphragm chamber
making sure the contact faces are clean.
49. Replace the diaphragm plate and the push rod
assembly and loosely fit the lower diaphragm
chamber on two bolts either side of the union
connection to locate the spigot in the recess.
50.
Refit the diaphragms in exactly the same way as
when dismantled.
51. Push the lower diaphragm chamber home to locate
in the recess and refit the M12 nuts and bolts.
Progressively and evenly tighten to a torque of
75 N m.
52. Retighten the long union nut to ensure a steam
tight seal.
53. Ensure the gasket faces are clean.
54. Refit the main valve head.
55. Replace the main valve return spring.
56. Fit a new gasket.
57. Replace the screen.
58. Assemble the pilot valve housing complete with the
spring housing assembly and tighten the nuts to the
recommended torques shown in Table 1.
59. 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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