Australian Pipeline Valve - Installation, Operation and Maintenance Manual
17
8.2.3 Stem Seal/ Packing Maintenance
a- In the event of stem packing leakage, CLOSE the valve and release the cavity pressure.
b- Remove the stinger from the packing injection fitting. Insert the pressure relieving stinger tool to
relieve any stem packing pressure.
c- Once pressure is removed and the relief tool has been removed, remove the plug from the packing
relief port.
d- Using a grease gun, inject stem seal packing into the packing injector fitting until fresh packing is seen
coming through the relief port.
e- Reinstall the relief port plug. Add additional packing until the pressure in the packing gland stabilises
then tighten the injector stinger. Please see the Packing Box Pressure PSIG table below for required
pressures.
API6D THROUGH CONDUIT EXPANDING GATE VALVE - AP400-405 SERIES
PACKING BOX PRESSURE PSIG
Valve Pressure
Class
Packing Box Pressure (PSIG)
150
13,263 kPa (1925 psi)
300
17,914 kPa (2600 psi)
400
20,325 kPa (2950 psi)
600
25,321 kPa (3675 psi)
900
32,727 kPa (4750 psi)
1500
47,541 kPa (6900 psi)
Over pressurising the injectable packing will distort packing, making the valve
difficult to operate.
Stem
Stem Packing
Stem
Packing
Injection
Fitting
Stem Yoke
Lantern Ring
Stem Packing
Figure 2: Packing Injection
(Design/fitment varies depending on
size/class specification)
