Flowserve 800 Split-Wedge Gate Valve - Manual (Page 7)

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7.0 MAINTENANCE REQUIREMENTS
7.1 Preventive Maintenance
7.1.1 Check all nuts and bolts periodically to ensure tightness and to forestall possible leaks. Recommended torque values
are presented in Section 11.0.
7.1.2 Keep valve stem clean and properly lubricated.
7.1.3 Check conditions of packing and replace as necessary.
7.2 Recommended Spare Parts
7.2.1 Recommended spare parts are gaskets, packing, disc pack and stem. The recommended quantity is one (1) set of
packing and gaskets for every two (2) valves of a particular type but not less than one (1) set of each type. One (1)
disc pack and one (1) stem are recommended for every ten (10) valves of a particular type.
7.3 Lubrication
7.3.1 Apply a light coating of lubricant (Dow Corning Molykote P37 paste or equal) to the threaded area of the stem
when necessary.
7.3.2 Lubricate bolting with Nuclear Grade Never-Seez or castor oil.
8.0 PERIODIC IN-SERVICE TESTING RECOMMENDATIONS
AND PROCEDURES
8.1 It is recommenced that the valve be operated from full open to full close at least once every six months.
800-lb. Split-Wedge Gate Valves FCD ADENIM0002-00