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TC-003001-10/ Rev 2
MAINTENANCE PROCEDURES
Because of the simple design and operation, the WKM DynaCentric MB High Performance Butterfly Valve requires
virtually no maintenance. Its non- lubricated construction and protected seat design provides reliable leak free
performance without routine servicing.
The only preventive maintenance recommended for the valve is to periodically inspect for leaks around the stem
packing. Should a leak appear the packing can be adjusted by tightening the gland retainer nuts slightly. Avoid
excessive tightening which may result in excessive valve torque or premature packing wear.
TROUBLESHOOTING
Trouble Probable Cause Remedy
The valve will
not seal properly
The seat and/or disc is worn or damaged Replace worn parts.*
Foreign matter is present between seat and
disc
Operate several times to wipe clean.
Operator stops are not set properly. Adjust stops to proper setting.
The valve is hard to
operate
Buildup of solids or roughness on edge of
disc.
Operate several times to wipe clean or
disassemble valve and clean disc edge.*
Stem packing is too tight.
Tighten packing only sufficiently to stop
leaks.
Operator is not installed properly.
Reinstall operator in proper alignment
with valve stem.
The valve
Disc hits on side of pipe. Check for proper pipe clearance.
The valve is leaking
around stem
Gland nuts are loose. Tighten gland nuts.
Packing is damaged or worn. Replace packing.
The valve opens and
closes with line flow
Handle or actuator does not provide proper
restraint.
Restrain handle or actuator when in
static position.
* Contact your Cameron representative for technical information or repair manual. Additional information is also
available on-line at www.c-a-m.com
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