Operating & Service Manual 8 OPS-801 Rev.06
Section 4 Regular Field Maintenance
4.1 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 good grade of automotive grease is generally used and is injected through the grease zert located
on the bonnet cap with a hand held lubricate.
Lubrication of Stem Bearing
4.2 Valve Cavity Lubrication
The valve cavity should be lubricated on a regular basis to ensure continuous smooth operation of the valve. A
general rule of thumb is to re-grease the valve cavity after about 50 cycle of operations of whenever the valve
has been in dormant over a long period of time. Whenever possible lubrication should only be done after the
valve is isolated from the pressure.
1)
Lubrication Procedure with Isolated Line Pressure
a)
Close valve. Remove cap on injection fitting located on the bonnet and install stinger cap to bleed off
