Cat Pumps 7542 1/2" Multiple Gun Pressure Unloader Blu BB R 21/4000

1/2" Multiple Gun Pressure Unloader Blu BB R 21/4000

Product features:

• Maintains full system pressure while running in by-pass without full load on pump.
• Senses pressure built up from downstream flow changes and by-passes flow to protect pump from overpressure.
• Minimum pressure fluctuations with alternating use of multiple guns.
• Multiple ports for convenient mounting.
• Color coded spring for easy identification and simple change from one model to another.
• Standard NBR o-rings with alternative options for temperature and chemical compatibility.
• This Pressure Sensitive Regulating Unloader is designed for single or multiple pump, weep or multi-nozzle systems. This unloader maintains set system pressure and goes into by-pass with the release of the trigger or an obstruction downstream. Pressure is held in the line during by-pass with full pressure when the gun is opened or the obstruction cleared and minimal pressure fluctuation with the alternating use of multiple guns. 5-10% by-pass is necessary for optimum performance (blue spring).