12
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 PN-DR, the following inspection and maintenance
should be performed regularly.
Part
Inspection and Maintenance Frequency
Screen
Disassemble and clean annually. If there is substantial blockage,
install a strainer (approximately 60 mesh) ahead of PN-DR.
Main Valve, Valve Seat If there is chattering or dirt, premature wear may result.
Valve Stem,
Spacer (Slide Bearing)
If hunting or chattering takes place, premature wear may result.
Bellows
If hunting or chattering takes place, cracks or fatigue may develop
in a short period of time.
Seal Ring
Replace annually.
Premature wear may occur.
Packing Replace
annually.
Premature wear may occur.
172-65119MA-01 (PN-DR) 13 Jun 2013
