Apollo Valves 61YLF-20-T1 Series Посібник з монтажу, експлуатації та технічного обслуговування - Сторінка 4
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APOLLO
BRONZE SWING CHECK VALVE IOM GUIDE
Page 4 of
disc have a maximum permissible leakage rate per MSS SP-80 of 40ml of water per hour per inch of pipe
size. Soft-seated/resilient disc have bubble-tight seal during reverse flow.
MAINTENANCE
If the cap/hinge leaks, isolate and depressurize the unit. Check for damage or wear. If damage is due to
scratches or nicks, repair damage area by resurfacing to maintain flatness and seal using a thread
sealant.
Seat leakage can be resolved by:
Flushing seat area with high rate of flow through the valve. In some cases, foreign materials or debris
causes the disc to completely close allowing leak across the check. If seat leakage persists, dismantle
valve and verify cause.
Scratches or dents on seat and disc can be corrected by lapping disc while it is in the body. Apply
lapping compound on the disc and seat, and apply mild amount of pressure to lap both surfaces.
If lapping cannot resolve seat leakage, replace disc.
In Viton or PTFE disc, it is recommended to replace it.
Swing Check 61Y ES 1498 a.pdf.doc
1418 S. Pearl Street Pageland SC USA 29728
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