Emerson Liebert XDR - Manual (Page 31)

Piping
25
Figure 25 Oil rings on header and Liebert XD Flex Pipe connectors
9. Thread the union nut of the Liebert XD Flex Pipe coupling onto the port coupling to ensure the
threads mate properly.
10. Using the wrench arrangement shown in Figure 26, torque the couplings to the values in
Table 5.
NOTICE
Risk of twisted or kinked piping. Can cause flow restriction or leaks.
It is imperative that the brass body of the Liebert XD Flex Pipe coupling does not rotate while
the couplings are being tightened. Failing to do so may damage the female coupling.
Figure 26 Wrench arrangement for tightening couplings
Table 5 Torque for connecting Liebert XD Flex Pipe to prefabricated piping
Coupling
Size
Crowsfoot
Size, in (mm)
Torque,
ft-lb (Nm)
RF08 1-3/16 (30) 25.8 (30-35)
RF12 1-5/8 (41) 48.0 (60-65)
RF16 1-31/32 (50) 62.7 (80-85)
Stainless Steel Delta Ring
on Header Port Connector
Rubber Ring
Around Poppet
Valve Face
Oil
Applicator
Spout
Poppet Valve Face
Crowsfoot
Torque Wrench
Wrench holding brass body of
female coupling stationary
to prevent it from turning