Source VERSA-WEDGE, Руководство пользователя

Страница: 31 / 33

Operating & Service Manual 5 OPS-811 Rev.00
c) Inject grease into the valve cavity through the other body grease fitting.
d) Once completion of lubrication, remove releasing tool and grease pump. Re-install grease fitting
caps securely on the both fittings.
CAUTION:
Lubricating pressure must not exceed the rated working pressure of the valve being
lubricated. A pressure gage should be used to motitor the lubricating pressure.
4.2 Stem Bearing Assembly Lubrication
Regular lubrication of the stem bearing assembly is essential to maintain a trouble free and smooth
operation of a valve. A small amount of good lithium based bearing grease is injected to bearing
housing through the grease zerk located on the bonnet with a hand held lubricator. DO NOT overfill.
4.3 Stem Packing Maintenance
In the event of stem packing leakage, injectable packing may be injected into stem packing box
through the injection fitting located on bonnet.
Caution shall be taken if this procedure is being done while the valve is in service and under
pressure.
Packing Injection Procedure
a) Remove the hex head fitting stringer, insert injectable packing stick into injection fittings.
b) Run stringer all the way in against the stem
packing fitting then back out when in terms
of ensuring the ball check has seated.
Discontinuous operation may be required
to evenly distribute the sealant, generally
once the pressure rises above valve rated
pressure, hold for 2 or 3 minutes.
c) If necessary, repeat injection of the injectable packing until sufficient to eliminate leakage.