Taylor-Wharton LP3 - Manual (Page 17)

MAINTENANCE
Routine inspections of the system are recommended. The need for maintenance usually becomes apparent
from inspection and indications of improper operation. Typical trouble indications include leakage from
valves or piping connections and excessive venting through relief valves. Keep a permanent log of all
inspections and repairs performed. Such a log can be valuable in evaluating performance and scheduling
maintenance.
Date Nature of Work (Describe in Full) Remarks Servicemen's Signature
Figure 9: Inspection and Repair Log (Sample Form)
Always observe the safety precautions at the front of this manual and follow the instructions given in this
section. Before working on the system, properly empty the vessel of liquid and relieve pressure on the vessel
and piping. Do not allow unqualified persons to attempt repairs on this equipment. Refer to the Trouble-
Remedy Guide in this manual for assistance in troubleshooting.
Leak Test
After making repairs requiring disassembly or replacement, leak test all valves or piping joints that were taken
apart and reconnected. Apply leak detector fluid to the test surface. Large leaks instantly form large bubble
clusters, while fine leaks produce white foam that builds up more slowly. All leaks must be repaired and
retested before the system is returned to service.
Globe Valves
All globe valves (V-2, V-5, & V-7) except the vent valve (V-4) and pressure building valve (V-3) can be
replaced. The vent valve and pressure building valve are an integral part of the system. However, the valve
bodies rarely need replacement. It is usually more desirable to rebuild the valve without removing it from the
system. All of the globe valves use the same rebuild kit regardless of size (1/2” or 3/8”). The Taylor-Wharton
part number for the rebuild kit is 1750-9C35. All valve components, except the body, are provided in the kit.
17