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2. Maintenance
2.2 Valve Inspection
Seat(s)
Carefully examine the PTFE valve ball seats for cracking, checking or excessive wear. Leakage past the seat(s) may result from
these types of irregularities.
Surface Finish
Inspect the bore of the ball and the valve stem in the valve upper body for signs of galling. Replace both if galling exists. Galling
will continue to occur if only one part is replaced and the other is damaged.
Inspect the inside surface of each body end for marring. Replace the end if damaged. Leakage may occur from this kind of
damage.
Gaskets/O-ring(s)
Inspect for cracks, cuts, abrasions, flat spots or other damage that would cause leakage or ineffective cleaning. Replace as
necessary.
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