GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual
19
snugly into the stuffing box; the ends of a packing ring must not overlap or remain open when fitted
into the stuffing box.
7. When packing chamber becomes filled with packing, reassemble gland and gland flange. Alternate
tightening packing gland flange nuts 1/4 turn at a time until eyebolts begin to get tight. (If gland
travels more than the height of one packing ring into the packing chamber, insert one more ring and
repeat step 6. until chamber is filled.)
8. Install the gland and the gland flange/follower, install the gland studs and nuts. Bolting lubrication is
highly recommended to achieve adequate packing load. Tighten the nuts a few turns at a time to
maintain a straight and level gland flange.
9. Compare valve operation to original tightness. If valve operation is considerably tighter than original
operating tightness, back off 1/4 turn on each gland nut & recheck tightness. Where proprietary
packing sets are used such as (example only) Garlock EVSP 9000, Burgmann 6070 or Chesterton 1622
please consult packing manufacturer’s torques. The serialised as-built drawing will indicate the
packing used, please refer to APV. For Belleville spring energised gland packing bolts, refer to spring
manufacturers torques. Also see Section 3.3 for more information on gland packing tightening. Various
packing types, materials, proprietary combinations and styles with and without spacers/lantern rings,
etc, and torque limitations of some bolting materials, bonnet design variations, stuffing box and stem
smoothness, means it is not possible to safely publish recommended torques for packing. In addition,
higher pressure ratings will require higher torques especially if media types are hazardous or more
leak searching prone such as gas.
10. Actuate the valve through a minimum of three (3) complete cycles ending with the valve in the closed
position. Verify the torque provided for the valve being re-packed.
11. Several hours after a repacked valve has been returned to service, inspect the packing area to ensure
full compression, tight bolting and no leakage. Should leakage occur, tighten gland nuts at 1/4 turn
increments until leakage stops. The gland flange should not bend at all, if it does loosen and replace
flange.
FIGURE 6
FIGURE 6A
BRAIDED
END RING
DIE-FORMED
RINGS
BRAIDED
END RING
45º
1
4
9
8
6
7
5
3
2
ITEM DESCRIPTION
1
YOKE NUT
2
YOKE SLEEVE
3
STEM
4
GLAND NUT
5
GLAND FLANGE
6
GLAND BOLT STUD
7
PACKING GLAND
8
PACKING
9
BONNET
120° STAGGER OF JOINTS*
45° END CUT*
TYPICAL GLOBE VALVE (BOLTED BONNET DESIGN)
STEM PACKING*
*Example only, refer to as-built drawing. Die formed/moulded genuine APV packing set is required for fugitive emission
service.
