172-65120MA-13 (CK-Series) 24 Aug 2020
8
Maintenance
Be sure to use only the recommended components when repairing the
product, and NEVER attempt to modify the product in any way. Failure to
observe these precautions may result in damage to the product or burns
or other injury due to malfunction or the discharge of fluids.
CAUTION
Operational Check
A visual inspection of the following items should be done on a daily basis to
determine whether the product is operating properly or has failed. Periodically (at
least biannually) the operation should also be checked using diagnostic equipment,
such as a stethoscope.
If the product should fail, it may cause damage to piping and equipment, resulting in
faulty or low quality products.
Normal
:
Where inlet pressure is higher than outlet pressure (equal to or greater
than the minimum opening differential pressure), flow, in the proper
direction, can be verified.
If outlet pressure becomes higher than inlet pressure, flow ceases.
Leakage
:
There is flow even when outlet pressure becomes higher than inlet
pressure.
Parts Inspection
When parts have been removed, or during periodic inspections, use the following
table to inspect the parts and replace any that are found to be defective.
Procedure
Gaskets:
Check for warping or damage
Valve Disc:
Check for scratches
Inlet Union Sealing Surfaces: Check for scratches
Coil Spring:
Check for scratches or wear
(After cleaning inside the body)
Spring Holder: Check for scratches or wear
