PLSRZ2140 Pulsar 1/2" Flow Actuated Unloader 5.3 - 21.0 gpm 4050 PSI

Near total zero setting of the outlet pressure at gun closure  increases safety • Reduced pressure loss • Makes for easier gun operation • Extremely reliable • Easy maintenance

Max . Volume  5.3 to 21.0 GPM

Max . Pressure  4050 PSI

Min . Pressure  580 PSI

Max Temperature  1400 F  

Note: The valve has been designed for continuous use at a water temperature of 140° F. It can operate for short periods at a maximum temperature of 195° F. 

Port Sizes: Inlet 1/2" BSP-F Outlet  1/2" BSP-F Bypass 1/2" BSP-F

Overall Dimensions 9.35" x 4.42" x 2"

Weight  3.8 lbs 

This valve, on a system that produces hot water, must be fitted upstream from the source of heat. On a system that generates hot water, it is advisable to use accessories that limit the accidental increase of fluid temperature. Always install a safety valve. We recommend the use of a nozzle with flow rate which allows a regular discharge from the valve bypass of at least 5% of the flow supplied by the pump. In order to achieve a constant pressure and easy adjustment. If the nozzle wears out, the pressure decreases. To reset pressure back to working level, it is necessary to replace the worn nozzle. When a new nozzle is fitted, resetting of the system to its original working pressure is required. 

DISCHARGE SYSTEM AND WATER ADDUCTION

The PLSRZ2140 can be fitted on machines fed directly by the water system with bypass recycle to the pump or in machines fed by a tank where the bypass flow is also discharged. 

In certain conditions, depending on installation and in particular:

• Through feeding from tank

• With long delivery lines or strong difference in level

• With low flow and small flow factor nozzles It could occur that at gun opening, a delay in the reset of the working pressure is revealed or a pulsation of the valve. 

To avoid such occurrences, it is necessary to always guarantee a pressure of at least 43-72 PSI in the bypass line. 

This pressure can be obtained by throttling the bypass line in one of the following ways:

• Fitting in the bypass channel a 1/4” tube instead of 3/8”

• Fitting in the bypass channel a rigid tube of a sufficiently small diameter

• Inserting in the bypass channel a connector with an adequate orifice diameter

• Inserting in the bypass connection a washer with an adequate diameter 

SKU: PLZ2140