Unloader valve · Brass 7537

• Flow3.8–80 l/min
• Pressure range15.8–180 bar
• Inlet connection1/2" NPT(F)

Brass pressure-sensitive regulating unloader. It maintains full system pressure while the pump runs in by-pass without full load; it senses the pressure build-up from changes in downstream flow and by-passes the flow to protect the pump from overpressure. Pressure fluctuations stay small even with alternating use of several guns. Multiple ports make mounting convenient. The colour-coded spring identifies the pressure range and can be moved from one model to another. NBR O-rings are standard (fluid temperature up to 60 °C in continuous duty and up to 90 °C for short periods); with FPM O-rings for higher temperatures and chemical compatibility the valve carries the suffix .0110. The valve can be converted to a relief valve.