Model 3300-0102 & 3300-0103 High Flow
Balanced Pressure Regulator Valves
Installation & Operation Instructions
Form L-1523
11/09
Installation
As a relief valve, this valve should be placed in an area that remains pressurized when the gun is shut off.
As a pressure regulator, the valve maintains the pressure in the system (even during flow changes). In this condition,
always use a suitable safety valve. If the bypass is directed directly into the pump, caution should be taken to avoid
excessive water temperature increases.
Operation
IMPORTANT
:
The bypass port is at the bottom. The inlet port is on the side.
The bypass should be returned to a baffled tank for turbulence control.
Pressure Adjustment/Setting
As a relief valve, the adjustment has to be made in such a way that the pressure setting is not higher than the system’s
working pressure.
As a pressure regulator, adjust the valve when the system is pressurized and the gun is open. As the adjustment cap is
turned, there should be a corresponding change in pressure. To increase the pressure, turn the cap clockwise; to
decrease the pressure, turn the cap counterclockwise. Once the desired pressure is reached, tighten the ring nut to lock
the cap in place.
Max. Flow Pressure Range Max Temp.
Inlet Port
Bypass Port
Dimensions
Standard
55 GPM
260-2000 PSI
185º F
3/4” NPT
1/2” NPT
6.25” x 2.00” x 1.50”
Metric
208 LM
18-138 BAR
85º C
3/4” NPT
1/2” NPT
159 x 50 x 38 mm
Specifications for 3300-0103
Standard
55 GPM
260-2000 PSI
185º F
1” NPT
1” NPT
6.25” x 2.90” x 1.65”
Metric
208 LM
18-138 BAR
85º C
1” NPT
1” NPT
159 x 74 x 42 mm
Specifications for 3300-0102
Order Information
Part No.
Description
3300-0102
3/4” NPT Inlet x 1/2” NPT Bypass Model
3300-0103
1” NPT Inlet x 1” NPT Bypass Model
3430-0747
Piston and Seat Repair Kit
Troubleshooting
Valve chatters
Valve is installed improperly (inlet & bypass may be reversed).
Valve is missing its orifice washer.
Valve is improperly set; repeat adjustment process.
Valve continually bypasses
Seat or piston worn; replace as needed.
Valve is improperly set; repeat adjustment procedure.
Leaking out the top of valve
O-ring and piston are worn or cut. Install repair kit.
