2
CASH VALVE™
TYPES K-10 AND K-15 BACK PRESSURE VALVES
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
OPERATING INSTRUCTIONS
Adjusting the Delivery Pressure
The regulator’s delivery pressure setting is
adjusted by turning the adjusting screw (2) at
the top of the spring chamber (6) after removing
the adjusting screw cap (1) and loosening the
adjusting screw lock nut (3). To obtain a higher
pressure setting, turn the adjusting screw
clock-wise (into the spring chamber). To lower
the pressure setting, turn the adjusting screw
counter-clockwise (out of the spring chamber).
Tighten the adjusting screw lock nut after the
adjustment has been made and install the
closing cap.
MAINTENANCE INSTRUCTIONS
The following procedures are provided for
servicing the K-10 and K-15 backpressure relief
valves. All repair parts can easily be installed
without removing the valve from the line.
CAUTION
Before attempting to replace any spare parts, be
sure to shut off all pressure connections to the
valve. With the valve closed, however, system
pressure could still be locked between the
shut-off valve and the inlet and/or outlet sides of
the relief valve. Before proceeding with the valve
service, be certain to relieve the pressure from
BOTH sides of the valve.
Refer to the K-15 cut away view for parts
and identification.
Servicing the Pressure Spring (7), Valve
O-rings (11 and 12), Valve Pusher Stem (13)
and Piston (14).
1. Unscrew the adjusting screw cap (1). Inspect
and if necessary, replace the cap O-ring (4).
2. Loosen the lock nut (3) ¼ turn and turn
the adjusting screw (2) counter-clockwise
until the pressure spring (7) is no longer
under tension.
NOTE
When installing the adjusting screw during
reassembly, turn the screw clockwise until the lock
nut touches the spring chamber. When the valve is
placed in service, the pressure setting should be very
close to the original setting.
TYPICAL INSTALLATIONS
FIGURE 1
FIGURE 2
Return Line
To Tank
Return
Suction
Pump
Power Unit
Power Unit
From Tank
Suction
Pump
Discharge from
Pump
TYPE K-10
OR K-15
TYPE K-10
OR K-15
TYPICAL HOOKUP AS PUMP BY-PASS
TYPICAL TYPES K-10 OR K-15 INSTALLED AT THE END OF PUMPING CIRCUIT TO MAINTAIN CIRCULATION
THROUGH ENTIRE LOOP
K-10 SPRING RANGES
K-15 SPRING RANGES
Size, in.
Adjustment Range, psi
¼, ⅜
15-30
25-75
50-140
100-300
200-600
½, ¾, 1, 1
1
/
4
15-75
-
50-150
100-300
200-600
Size, in.
Adjustment Range, psi
¼, ⅜
25-75
20-150
100-300
150-800
600-1500
½, ¾
-
25-150
20-200
100-700
600-1500