172-65260m-05 (S-COS/S-COSR Pressure Reducing Valve) 27 Oct 2008
14
Maintenance
Take measures to prevent people from coming into direct contact with
product outlets. Failure to do so may result in burns or other injury from
the discharge of fluids.
CAUTION
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
To ensure long service life of the pressure reducing valve, the following inspection
and maintenance should be performed regularly.
Part
Inspection and Maintenance Frequency
Main Screen,
Pilot Screen
Disassemble and clean annually.
If there is substantial blockage, install a strainer
(approximately 60 mesh) ahead of the pressure
reducing valve.
Main Valve,
Main Valve Seat,
Pilot Valve,
Pilot Valve Seat
Replace after approximately 15,000 hours.
If there is chattering or dirt, premature wear may result.
Piston Ring
Replace after approximately 8,000 hours.
If there is chattering or if scale build-up is severe,
premature wear may result.
Piston
Replace after approximately 30,000 hours.
If hunting or chattering takes place, premature wear
may result.
Trap Valve Seat
(S-COS Only)
Replace after approximately 40,000 hours.
If scale build-up is severe, blockage may occur in a
short period of time.
Diaphragm
Replace after approximately 30,000 hours.
If hunting or chattering takes place, cracks or fatigue
may develop in a short period of time.
