Featured Image for Pressure-Actuated Unloaders

Pressure-actuated valves control the flow of the water to the nozzle(s).  During bypass mode, all of the water is directed back to the supply at nearly zero pressure.  This valve is typically used in applications in which frequent on/off action is required at the nozzle, such as; pressure washer, central cleaning station or hydro-excavation.  While slightly different design concepts are used, these unloaders typically will actuate at 5 to 20% above the operating pressure of the system.

Flow ranges are from 0.5 GPM (2 l/min) to 625 GPM (2366 L/min) and pressure range is from 100 PSI to 50,750 PSI (7 to 3500 Bar).  In lower pressure applications, a manually adjusted spring is used to control the flow; however, pneumatic and electric controls can also be used.  Typical metal materials are forged brass, 303 stainless steel, 316 stainless steel and elastomers will be either Nitrile, Viton or Teflon.

Image Model No. Flow Pressure Inlet Port Outlet Port Bypass Port
featured image for 22760-01 1.3 - 8 GPM5 - 30 L/min145 - 3045 PSI10 - 210 bar3/8" FNPT 3/8" FNPT 1/4" FNPT
featured image for 22985 2.1 - 52.8 GPM8 - 200 L/min580 - 3000 PSI40 - 200 bar1" FBSP 1" FBSP 3/4" FBSP
featured image for 22973-3000
featured image for 22971C-51 2.1 - 35.7 GPM7.9 - 135 L/min1740 PSI120 bar3/4" BSP 3/4" BSP 3/4" BSP
featured image for 22973C-53
featured image for 22971C-53
featured image for 22090P 53 GPM200 L/min200 - 2200 PSI15 - 150 bar1" FBSP 1" FBSP 1" FBSP
featured image for 22981-LF
featured image for 22984
featured image for 22981R-30 2.1 - 66.1 GPM8 - 250 L/min580 - 2175 PSI40 - 150 bar1" BSP 1" BSP 3/4" BSP
featured image for 22974-01
featured image for 22974 2.1 - 35.7 GPM8 - 135 L/min362 - 580 PSI25 - 40 bar3/4" FNPT 3/4" FNPT 3/4" BSP
featured image for 22973CH 2.1 - 26.4 GPM8 - 99 L/min580 - 4060 PSI40 - 280 bar3/4" FNPT 3/4" FNPT 3/4" BSP
featured image for 22971CH 2.1 - 35.7 GPM8 - 135 L/min580 - 1740 PSI40 - 120 bar3/4" BSP 3/4" BSP 3/4" BSP
featured image for 22913A-01 2.2 - 13 GPM8.3 - 49.2 L/min375 - 3000 PSI25.9 - 200 bar1/2" FNPT 1/2" FNPT 1/2" BSP
featured image for 22912A-01 2.2 - 13 GPM8.3 - 49.2 L/min375 - 2400 PSI25.9 - 165 bar1/2" FNPT 1/2" FNPT 1/2" BSP
featured image for 22911A-01 2.2 - 13 GPM8.3 - 49.2 L/min375 - 1400 PSI25.9 - 100 bar1/2" FNPT 1/2" FNPT 1/2" BSP
featured image for 22910A-01 2.2 - 13 GPM8.3 - 49.2 L/min375 - 800 PSI25.9 - 55 bar1/2" FNPT 1/2" FNPT 1/2" BSP
featured image for 22860P 4 - 132 GPM15 - 500 L/min725 - 2030 PSI50 - 140 bar1-1/2" BSP 1-1/2" BSP 1-1/2" BSP
featured image for 22230 15.9 GPM60 L/min1160 - 11600 PSI80 - 8000 bar1/2" BSP 1/2" BSP 1/2" BSP
featured image for 22083H-SSS
featured image for 22083H-SS 2320 PSI160 bar1/2" NPT 1/2" NPT 1/2" NPT
featured image for 22082H-SSS 4060 PSI280 bar1/2" NPT 1/2" NPT 1/2" NPT
featured image for 22082H-SS 4060 PSI280 bar1/2" NPT 1/2" NPT 1/2" NPT
featured image for 22083H 2320 PSI160 bar1/2" NPT 1/2" NPT 1/2" NPT
featured image for 22082H 4060 PSI280 bar1/2" NPT 1/2" NPT 1/2" NPT
featured image for 22950H 2.1 - 16 GPM8 - 60 L/min3200 - 5800 PSI220 - 400 bar1" FNPT 1" FNPT 1" BSP
featured image for 22949H 2.1 - 60 GPM8 - 225 L/min600 - 1600 PSI40 - 110 bar1" FNPT 1" FNPT 1" BSP
featured image for 22948H 2.1 - 60 GPM8 - 225 L/min600 - 1600 PSI40 - 110 bar1" FNPT 1" FNPT 1" BSP
featured image for 22947H 2.1 - 60 GPM8 - 225 L/min300 - 1160 PSI20 - 80 bar1" FNPT 1" FNPT 1" BSP
featured image for 22947 2.1 - 60 GPM8 - 225 L/min300 - 1160 PSI20 - 80 bar1" FNPT 1" FNPT 1" BSP
featured image for 22083-SSS 2320 PSI160 bar1/2" NPT 1/2" NPT 1/2" NPT
featured image for 22083-SS 2320 PSI160 bar1/2" NPT 1/2" NPT 1/2" NPT
featured image for 22082-SSS 4060 PSI280 bar1/2" NPT 1/2" NPT 1/2" NPT
featured image for 22082-SS 4060 PSI280 bar1/2" NPT 1/2" NPT 1/2" NPT
featured image for 22973CP 2.1 - 35.7 GPM8 - 135 L/min580 - 4060 PSI40 - 280 bar3/4" FNPT 3/4" FNPT 3/4" BSP
featured image for 22765APM-SS 1.3 - 5 GPM5 - 19 L/min580 - 4000 PSI19 - 276 bar3/8" FNPT 3/8" FNPT 1/4" BSP
featured image for 22765A-SS 1.3 - 5 GPM5 - 19 L/min580 - 4000 PSI19 - 276 bar3/8" FNPT 3/8" FNPT 1/4" BSP
featured image for 23285H 6.6 GPM25 L/min2000 PSI140 bar1/2" FNPT
featured image for 23285 6.6 GPM25 L/min2000 PSI140 bar1/2" FNPT
featured image for 23280H 6.6 GPM25 L/min4000 PSI275 bar1/2" FNPT
featured image for 23275H 6.6 GPM25 L/min2000 PSI140 bar1/2" FNPT
featured image for 23275 6.6 GPM25 L/min2000 PSI140 bar1/2" FNPT
featured image for 23270H 6.6 GPM25 L/min3000 PSI207 bar1/2" FNPT
featured image for 22106-51 21.1 GPM80 L/min406 - 4060 PSI28 - 280 bar1/2" BSP 1/2" BSP 1/2" BSP
featured image for 22091 53 GPM200 L/min1015 PSI70 bar1" FNPT 1" FNPT 1" FNPT
featured image for 22090H 53 GPM200 L/min217.5 - 2175 PSI15 - 150 bar1" FNPT 1" FNPT 1" FNPT
featured image for 23295H 6.6 GPM25 L/min0 - 2000 PSI0 - 140 bar3/8" FNPT 3/8" FNPT
featured image for 23295 6.6 GPM25 L/min0 - 2000 PSI0 - 140 bar3/8" FNPT 3/8" FNPT
featured image for 23290H 6.6 GPM25 L/min0 - 4000 PSI0 - 275 bar3/8" FNPT 3/8" FNPT
featured image for 22983-30 2.1 - 66 GPM8 - 250 L/min200 - 800 PSI14 - 55 bar1" BSP 1" BSP 3/4" BSP
featured image for 22983 2.1 - 66 GPM8 - 250 L/min200 - 800 PSI14 - 55 bar1" BSP 1" BSP 3/4" BSP
featured image for 25151 10.5 GPM40 L/min1500 PSI105 bar3/8" BSP 3/8" BSP (2) 1/4" BSP
featured image for 25150 10.5 GPM40 L/min4000 PSI276 bar3/8" BSP 3/8" BSP (2) 1/4" BSP
featured image for 22085 10.5 GPM40 L/min5100 PSI350 bar3/8" MBSP 3/8" FNPT 1/2" FBSP
featured image for 22760A-SS 1.3 - 8 GPM5 - 30 L/min145 - 3045 PSI10 - 210 bar3/8" FNPT 3/8" FNPT 1/4" FNPT
featured image for 22760APM 1.3 - 8 GPM5 - 30 L/min145 - 3045 PSI10 - 210 bar3/8" FNPT 3/8" FNPT 1/4" FNPT
featured image for 22760A 1.3 - 8 GPM5 - 30 L/min145 - 3045 PSI10 - 210 bar3/8" FNPT 3/8" FNPT 1/4" FNPT
featured image for 22765APM 1.3 - 5 GPM5 - 19 L/min580 - 4000 PSI19 - 276 bar3/8" FNPT 3/8" FNPT 1/4" BSP
featured image for 22765A 1.3 - 5 GPM5 - 19 L/min580 - 4000 PSI19 - 276 bar3/8" FNPT 3/8" FNPT 1/4" FNPT
featured image for 23270 6.6 GPM25 L/min3000 PSI207 bar1/2" FNPT
featured image for 23280 6.6 GPM25 L/min4000 PSI275 bar3/8" FNPT
featured image for 22109 120 GPM450 L/min4350 - 4800 PSI300 - 330 bar1-1/4" FBSP 1-1/4" FBSP 1-1/4" FBSP
featured image for 22913A 2.2 - 13 GPM8.3 - 49.2 L/min375 - 3000 PSI25.9 - 200 bar1/2" FNPT 1/2" FNPT 1/2" BSP
featured image for 22912A 2.2 - 13 GPM8.3 - 49.2 L/min375 - 2400 PSI25.9 - 165 bar1/2" FNPT 1/2" FNPT 1/2" BSP
featured image for 22911A 2.2 - 13 GPM8.3 - 49.2 L/min375 - 1400 PSI25.9 - 100 bar1/2" FNPT 1/2" FNPT 1/2" BSP
featured image for 22910A 2.2 - 13 GPM8.3 - 49.2 L/min375 - 800 PSI25.9 - 55 bar1/2" FNPT 1/2" FNPT 1/2" BSP
featured image for 22981 2.1 - 66 GPM8 - 250 L/min580 - 2200 PSI40 - 152 bar1" BSP 1" BSP 3/4" BSP
featured image for 22982 2.1 - 52.8 GPM8 - 200 L/min580 - 3000 PSI40 - 207 bar1" BSP 1" BSP 3/4" BSP
featured image for 22981-30 2.1 - 66.1 GPM8 - 250 L/min580 - 2175 PSI40 - 150 bar1" BSP 1" BSP 3/4" BSP
featured image for 22981P 2.1 - 66.1 GPM8 - 250 L/min2175 PSI150 bar1" BSP 1" BSP 3/4" BSP
featured image for 22980P 2.1 - 26.4 GPM8 - 100 L/min7250 PSI500 bar1/2" BSP 3/4" BSP 1/2" BSP
featured image for 22980-30 2.1 - 26.4 GPM8 - 100 L/min7250 PSI500 bar3/4" BSP 1/2" BSP 1/2" BSP
featured image for 22980 2.1 - 26.4 GPM8 - 100 L/min7250 PSI500 bar3/4" BSP 1/2" BSP 1/2" BSP
featured image for 22950 2.1 - 16 GPM8 - 60 L/min3200 - 5800 PSI220 - 400 bar1" FNPT 1" FNPT 1" BSP
featured image for 22949 2.1 - 32 GPM8 - 120 L/min1600 - 3200 PSI110 - 220 bar1" FNPT 1" FNPT 1" BSP
featured image for 22948 2.1 - 60 GPM8 - 225 L/min600 - 1600 PSI40 - 110 bar1" FNPT 1" FNPT 1" BSP
featured image for 22973C-50 2.1 - 26.4 GPM7.9 - 99 L/min4060 PSI280 bar3/4" BSP 3/4" BSP 3/4" BSP
featured image for 22971C-50 2.1 - 35.7 GPM8 - 135 L/min1740 PSI120 bar3/4" BSP 3/4" BSP 3/4" BSP
featured image for 22760L 0.03 - 8 GPM0.1 - 30 L/min600 PSI40 bar3/8" FNPT 3/8" FNPT 1/4" FNPT
featured image for 22971C-40 2.1 - 35.7 GPM8 - 135 L/min1740 PSI120 bar3/4" BSP 3/4" BSP 3/4" BSP
featured image for 22973C-40 2.1 - 26.4 GPM7.9 - 99 L/min580 - 4060 PSI40 - 280 bar3/4" BSP 3/4" BSP 3/4" BSP
featured image for 22973C-01 2.1 - 26.4 GPM7.9 - 99 L/min580 - 4060 PSI40 - 280 bar3/4" FNPT 3/4" FNPT 3/4" BSP
featured image for 22971C-01 2.1 - 35.7 GPM8 - 135 L/min580 - 1740 PSI40 - 120 bar3/4" FNPT 3/4" FNPT 3/4" BSP
featured image for 22971C 2.1 - 35.7 GPM8 - 135 L/min580 - 1740 PSI40 - 120 bar3/4" FNPT 3/4" FNPT 3/4" BSP
featured image for 22973C 2.1 - 26.4 GPM8 - 99 L/min580 - 4060 PSI40 - 280 bar3/4" FNPT 3/4" FNPT 3/4" BSP
featured image for 22095-4000 580-5800 - 6500 PSI40-4000 - 450 bar1/2" FNPT 1/2" FNPT 1/2" FNPT
featured image for 22097-5000 21 GPM79 L/min2200 PSI150 bar1/2" FNPT 1/2" FNPT 1/2" FNPT
featured image for 22095-5000 21 GPM79 L/min4000 PSI280 bar1/2" FNPT 1/2" FNPT 1/2" FNPT
featured image for 22090 53 GPM200 L/min2175 PSI150 bar1" FNPT 1" FNPT 1" FNPT
featured image for 22083 2320 PSI160 bar1/2" NPT 1/2" NPT 1/2" NPT
featured image for 22082 4060 PSI280 bar1/2" NPT 1/2" NPT 1/2" NPT
featured image for 23290 6.6 GPM25 L/min0 - 4000 PSI0 - 275 bar3/8" FNPT 3/8" FNPT