2-4
Squeeze
Screw
Lubricator
Figure 2-2 Lubricator (Class 600 or under)
Figure 2-3 Lubricator for High Pressure Valve
(Class 600 or higher)
Lubricating procedure
(a) prepare grease of the type indicated on the nameplate.
(b) Tightly close the lubricator handwheel.
(c) Remove the squeeze screw, apply grease, and set the squeeze screw.
(d) Loosen the lubricator handwheel and drive grease by turning the squeeze screw.
(e) Repeat the procedure of 0), (c) and (d) until turning of the squeeze screw becomes
heavier. Tightly close lubricator handwheel.
(5) Pressurizing valve, check that there is no leak from the gasket sections for connection
to the valve body and process pipe. If leak is found, tighten the nuts. (Especially when
the process fluid temperature is 400 or higher, tighten the nuts again after raising
temperature of the valve in order that it may serve for a longer period without requiring
immediate maintenance service.) Standard tightening torques are shown in Table 4-4,
Table 4-5 of Chapter 4.
(6) When raising temperature of a valve which is used for high temperature service, raise
temperature gradually (standard rate is 100 per hour) and do not operate the valve when
its temperature is being raised.
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