Spirax Sarco HL 17, Installation And Maintenance Instructions Manual, Page: 8 / 20

IM-P278-01-EN-ISS1 CTLS
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4.2 To clean the strainer and replace the gasket
Isolate the valve and zero the pressure.
1 . Unscrew the unions and release pipework.
2. Unscrew the nuts.
3. Remove the top housing complete with the solenoid valve.
4. Remove the screen and clean (or replace if necessary).
5. Ensure the main valve return spring is still in position.
6. Fit the new gasket.
7. Replace the screen.
Assemble the top housing and tighten the nuts
to the torques shown in Table 1.
Refit the pipework and retighten the unions to
ensure a steam tight seal.
Refit the solenoid valve.
Bring the valve back into commission.
Table 1 Recommended tightening torques
Size of valve Nut size Tightening torques
½" , ¾" and 1"
DN15 , DN20 , DN25 and DN32
M10 40 N m (30 lbf ft)
DN40 and DN50 M12 45 N m (33 lbf ft)
DN80 M12 80 N m (59 lbf ft)
1
6
4
7
5
2
3