Spirax Sarco DP17 - Page 21

IM-P100-05 CTLS Issue 17
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Table 1
Recommended tightening torques for pilot valve chamber nuts
Size of valve Nut size Tightening torques
½", ¾", 1"
DN15, DN20, DN25 and DN32
M10 40 - 50 N m (30 - 37 lbf ft)
DN40 and DN50 M12 45 - 55 N m (33 - 41 lbf ft)
19
18
14
17
15
20. DP17, DP17E, DP17G, DP17Y and DP27G
Assemble the spring housing and tighten the nuts to the recommended torques shown
in Table 1, page 21.
DP17R
Assemble the air control block and tighten the nuts to the recommended torques shown
in Table 1, page 21.
21. Refit the pipework and retighten the unions to ensure a steam tight seal.
Bring the valve back into commission by following as many Steps as are necessary in
Section 4, page 16.