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pr500
Maintenance
It is recommended that a periodic
maintenance schedule be established to
4
inspect the valve stem for calcium or hard
water deposits and the condition of the
diaphragm, seat disc and control pilot. An
annual preventive maintenance schedule
should help identify problem situations
before emergency repairs are needed.
The normal replacement parts are the
diaphragm, seat disc and rubber parts of
Pressure Reducing Pilot 263 AP
Function
The control is a diaphragm actuated pres-
sure reducing valve, which is normally in
an open position due to the force of the
spring setting above the diaphragm. The
valve moves automatically toward the seat
(modulates) when the downstream pressure
exceeds the adjustable spring setting, thus
controlling the pressure to the desired set
point.
The photos and description contained in this brochure are solely intended as an indication.
Watts Industries reserves the right to make technical and design changes to its products without prior notice.
the control pilot. The diaphragm and seat
disc are available together in a rubber
repair kit. Rubber repair kits for control
pilots are sold separately. For maximum
life expectancy, all rubber repair kits should
be stored in a cool, dry environment and
not exposed to direct sunlight. In the
event a non-rubber component part is
required, please consult your local Watts
representative.
Start-up/Adjustment
Pressure adjustment is made by turning
the adjusting screw clockwise to increase
the pressure and the counter-clockwise to
decrease the setting.
specifications
size:
Temperature range:
Materials
1
Cover
2
Body Brass
Rubber Parts
3
and Diaphragm
4
stem stainless steel
5
spring Range
6
7
8
9
10
11
1.
Adj. screw cap
2.
Adj. screw
12
3.
Lock nut
4.
Threaded cap ring
13
5.
spring button
6.
spring cover
14
7.
Name plate
15
8.
spring
16
9.
screw
½"
50 ºC
Epoxy Coated Aluminum
Buna-N
0-30, 20-175 psi
10. Diaph. plate
11. Diaphragm
12. Body
13. Inner valve
assembly
14. spring
15. Bottom plug gasket
16. Bottom plug
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