Flowserve 800 Split-Wedge Gate Valve - Manual (Page 11)

11
9.0 MAINTENANCE INSTRUCTIONS (Continued)
9.1.2 Assembly (Continued)
(g) Note that it is not necessary to torque the gland retainer (131). The bonnet is truly sealed by
pressure. The only function of the retainer is to hold the bonnet in contact with the gasket until
it is deformed by pressure, locking the joint together and ensuring a tight seal. Since the bonnet
is sealed by pressure, constant cycling could compress the gasket and necessitate tightening of
the gland retainer setscrews (220).
(h) Once the bonnet is in the proper position, the gland retainer might require backing off to align
the slots for the gland bolts. Once this has been accomplished, the gland retainer setscrews
(220) should be installed and tightened (see Section 11.0 for recommended torque values).
(i) Install the packing into the bonnet in accordance with Section 9.2.
(j) Place the gland studs (205) into the slots and through the flange gland (133) and tighten the
gland stud nuts (234) (see Section 11.0).
(k) Replacement of the yoke (011), yoke sleeve (017), handwheel washer (250), hand wheel (136)
handwheel key (135) and handwheel nut (240) can be accomplished by reversing the procedure
specified in Paragraph 9.1.1 (a), (b), (c), (d), (e) and (f).
800-lb. Split-Wedge Gate Valves FCD ADENIM0002-00