Flowserve McCANNA CryoSeal Ball Valves - Manual (Page 10)

McCANNA CryoSeal ® Ball Valves FCD MMENIM2007-01-AQ – 04/15
10
4.2 Cleaning, Inspection, and Lubrication Instructions
4.2.1 After disassembly, discard bonnet gasket and stem seals (if removed). Gaskets and seals are
not re- usable. Carefully clean and inspect all parts for wear or damage, paying particular
attention to seating/sealing surfaces on ball and seats, stem journal and bonnet bore, and body/
bonnet gasket areas.
4.2.2 Damaged or badly worn parts should be replaced using only parts or repair kits supplied by
Flowserve. Valve parts considered for repair should be evaluated by an Authorized McCANNA
Repair Center to determine if repair is possible.
NOTE: Body seat surfaces are lapped flat, and must be checked for flatness and cleanliness before
reassembly. If re-lapping is required, contact the nearest Authorized McCANNA Repair Center.
4.2.3 Lubrication of valve parts to aid assembly and initial operation is recommended, when
permitted by service and operating conditions. The lubricant used must be compatible with the
intended service (see Table 1 below for recommended lubricants). If necessary, valve internal
wetted parts may be assembled without lubrication.
Table 1 - Lubricants
Recommended Lubricants
Stem Krytox
O-Rings / Stem Packing Krytox
Ball / Seats Molykote 321
Studs / Nuts (Bonnet and Adjuster) Never-Seez
4.2.4 Lubricants are to be applied sparingly; a thin wipe is sufficient. Do not apply lubricants with a
brush or other means. Excessive lubricant on the ball, seat, or in the stem bore can affect valve
performance and should be removed from the valve. If lubricant build-up or caking is visible on
the ball or seats, too much has been used.