
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.
Model | Flow | Pressure | Inlet | Discharge | Bypass | |
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22082 |
21.1 GPM 80 L/min |
4060 PSI 280 bar |
1/2" NPT | 1/2" NPT | 1/2" NPT |
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22082-SS |
21.1 GPM 80 L/min |
4060 PSI 280 bar |
1/2" NPT | 1/2" NPT | 1/2" NPT |
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22082-SSS |
21.1 GPM 80 L/min |
4060 PSI 280 bar |
1/2" NPT | 1/2" NPT | 1/2" NPT |
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22082H |
21.1 GPM 80 L/min |
4060 PSI 280 bar |
1/2" NPT | 1/2" NPT | 1/2" NPT |
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22082H-SS |
21.1 GPM 80 L/min |
4060 PSI 280 bar |
1/2" NPT | 1/2" NPT | 1/2" NPT |
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22082H-SSS |
21.1 GPM 80 L/min |
4060 PSI 280 bar |
1/2" NPT | 1/2" NPT | 1/2" NPT |
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22083 |
21.1 GPM 80 L/min |
2320 PSI 160 bar |
1/2" NPT | 1/2" NPT | 1/2" NPT |
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22083-SS |
21.1 GPM 80 L/min |
2320 PSI 160 bar |
1/2" NPT | 1/2" NPT | 1/2" NPT |
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22083-SSS |
21.1 GPM 80 L/min |
2320 PSI 160 bar |
1/2" NPT | 1/2" NPT | 1/2" NPT |
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22083H |
21.1 GPM 80 L/min |
2320 PSI 160 bar |
1/2" NPT | 1/2" NPT | 1/2" NPT |
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22083H-SS |
21.1 GPM 80 L/min |
2320 PSI 160 bar |
1/2" NPT | 1/2" NPT | 1/2" NPT |
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22083H-SSS |
21.1 GPM 80 L/min |
2320 PSI 160 bar |
1/2" NPT | 1/2" NPT | 1/2" NPT |
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22085 |
10.5 GPM 40 L/min |
5100 PSI 350 bar |
3/8" MBSP | 3/8" FNPT | 1/2" FBSP |
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22090 |
53 GPM 200 L/min |
2175 PSI 150 bar |
1" FNPT | 1" FNPT | 1" FNPT |
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22090H |
53 GPM 200 L/min |
2175 PSI 150 bar |
1" FNPT | 1" FNPT | 1" FNPT |
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22091 |
53 GPM 200 L/min |
1015 PSI 70 bar |
1" FNPT | 1" FNPT | 1" FNPT |
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22095-4000 |
21.1 GPM 80 L/min |
5800 PSI 400 bar |
1/2" FNPT | 1/2" FNPT | 1/2" FNPT |
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22095-5000 |
21.1 GPM 80 L/min |
4100 PSI 283 bar |
1/2" FNPT | 1/2" FNPT | 1/2" FNPT |
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22097-5000 |
21.1 GPM 80 L/min |
2200 PSI 138 bar |
1/2" FNPT | 1/2" FNPT | 1/2" FNPT |
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22106-51 |
21.1 GPM 80 L/min |
4060 PSI 280 bar |
1/2" BSP | 1/2" BSP | 1/2" BSP |
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22109 |
120 GPM 450 L/min |
4350 PSI 300 bar |
1-1/4" fBSP | 1-1/4" fBSP | 1-1/4" fBSP |
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22230 |
15.9 GPM 60 L/min |
11,600 PSI 8000 bar |
1/2" BSP | 1/2" BSP | 1/2" BSP |
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22760A |
1.3-8 GPM 5-30 L/min |
3045 PSI 210 bar |
3/8" FNPT | 3/8" FNPT | 1/4" FNPT |
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22760A-SS |
1.3-8 GPM 5-30 L/min |
3045 PSI 210 bar |
3/8" FNPT | 3/8" FNPT | 1/4" FNPT |
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22760APM |
1.3-8 GPM 5-30 L/min |
3045 PSI 210 bar |
3/8" FNPT | 3/8" FNPT | 1/4" FNPT |
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22760L |
8 GPM 30 L/min |
600 PSI 40 bar |
3/8" FNPT | 3/8" FNPT | 1/4" FNPT |
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22765A |
5 GPM 19 L/min |
4000 PSI 276 bar |
3/8" FNPT | 3/8" FNPT | 1/4" FNPT |
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22765A-SS |
5 GPM 19 L/min |
4000 PSI 276 bar |
3/8" FNPT | 3/8" FNPT | 1/4" FNPT |
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22765APM |
5 GPM 19 L/min |
4000 PSI 276 bar |
3/8" FNPT | 3/8" FNPT | 1/4" FNPT |
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22765APM-SS |
5 GPM 19 L/min |
4000 PSI 276 bar |
3/8" FNPT | 3/8" FNPT | 1/4" FNPT |
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22860P |
132 GPM 500 L/min |
2320 PSI 160 bar |
1-1/2" BSP | 1-1/2" BSP | 1-1/4" BSP |
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22910A |
13 GPM 49.2 L/min |
800 PSI 55 bar |
1/2" FNPT | 1/2" FNPT | 1/2" BSP |
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22910A-01 |
13 GPM 49.2 L/min |
800 PSI 55 bar |
1/2" FNPT | 1/2" FNPT | 1/2" BSP |
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22911A |
13 GPM 49.2 L/min |
1400 PSI 100 bar |
1/2" FNPT | 1/2" FNPT | 1/2" BSP |
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22911A-01 |
13 GPM 49.2 L/min |
1400 PSI 100 bar |
1/2" FNPT | 1/2" FNPT | 1/2" BSP |
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22912A |
13 GPM 49.2 L/min |
2400 PSI 165 bar |
1/2" FNPT | 1/2" FNPT | 1/2" BSP |
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22912A-01 |
13 GPM 49.2 L/min |
2400 PSI 165 bar |
1/2" FNPT | 1/2" FNPT | 1/2" BSP |
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22913A |
13 GPM 49.2 L/min |
3000 PSI 200 bar |
1/2" FNPT | 1/2" FNPT | 1/2" BSP |
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22913A-01 |
13 GPM 49.2 L/min |
3000 PSI 200 bar |
1/2" FNPT | 1/2" FNPT | 1/2" BSP |
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22947 |
60 GPM 225 L/min |
1160 PSI 80 bar |
1" FNPT | 1" FNPT | 1" BSP |
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22947H |
60 GPM 225 L/min |
1160 PSI 80 bar |
1" FNPT | 1" FNPT | 1" BSP |
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22948 |
60 GPM 225 L/min |
1600 PSI 110 bar |
1" FNPT | 1" FNPT | 1" BSP |
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22948H |
60 GPM 225 L/min |
1600 PSI 110 bar |
1" FNPT | 1" FNPT | 1" BSP |
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22949 |
32 GPM 120 L/min |
3200 PSI 220 bar |
1" FNPT | 1" FNPT | 1" BSP |
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22949H |
32 GPM 120 L/min |
3200 PSI 220 bar |
1" FNPT | 1" FNPT | 1" BSP |
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22950 |
16 GPM 60 L/min |
5800 PSI 400 bar |
1" FNPT | 1" FNPT | 1" BSP |
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22950H |
16 GPM 60 L/min |
5800 PSI 400 bar |
1" FNPT | 1" FNPT | 1" BSP |
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22971C |
35.7 GPM 135 L/min |
1740 PSI 120 bar |
3/4" FNPT | 3/4" FNPT | 3/4" FNPT |
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22971C-01 |
35.7 GPM 135 L/min |
1740 PSI 120 bar |
3/4" FNPT | 3/4" FNPT | 3/4" FNPT |
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22971C-40 |
35.7 GPM 135 L/min |
1740 PSI 120 bar |
3/4" BSP | 3/4" BSP | 3/4" BSP |
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22971C-50 |
35.7 GPM 135 L/min |
1740 PSI 120 bar |
3/4" BSP | 3/4" BSP | 3/4" BSP |
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22971CH |
35.7 GPM 135 L/min |
1740 PSI 120 bar |
3/4" FNPT | 3/4" FNPT | 3/4" BSP |
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22973C |
26.4 GPM 99 L/min |
4060 PSI 280 bar |
3/4" FNPT | 3/4" FNPT | 3/4" BSP |
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22973C-01 |
26.4 GPM 99 L/min |
4060 PSI 280 bar |
3/4" FNPT | 3/4" FNPT | 3/4" BSP |
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22973C-40 |
26.4 GPM 99 L/min |
4060 PSI 280 bar |
3/4" BSP | 3/4" BSP | 3/4" BSP |
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22973C-50 |
26.4 GPM 99 L/min |
4060 PSI 280 bar |
3/4" BSP | 3/4" BSP | 3/4" BSP |
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22973CH |
26.4 GPM 99 L/min |
4060 PSI 280 bar |
3/4" FNPT | 3/4" FNPT | 3/4" BSP |
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22973CP |
26.4 GPM 99 L/min |
4060 PSI 280 bar |
3/4" FNPT | 3/4" FNPT | 3/4" BSP |
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22974 |
35.7 GPM 135 L/min |
580 PSI 40 bar |
3/4" FNPT | 3/4" FNPT | 3/4" BSP |
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22980 |
26.4 GPM 99 L/min |
8700 PSI 600 bar |
3/4" BSP | 1/2" BSP | 1/2" BSP |
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22980-30 |
26.4 GPM 99 L/min |
7250 PSI 500 bar |
3/4" BSP | 1/2" BSP | 1/2" BSP |
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22980P |
26.4 GPM 99 L/min |
7250 PSI 500 bar |
1/2" BSP | 3/4" BSP | 1/2" BSP |
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22981 |
66 GPM 250 L/min |
2200 PSI 152 bar |
1" BSP | 1" BSP | 3/4" BSP |
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22981P |
66 GPM 250 L/min |
2175 PSI 150 bar |
1" BSP | 1" BSP | 3/4" BSP |
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22981-30 |
66 GPM 250 L/min |
2175 PSI 150 bar |
1" BSP | 1" BSP | 3/4" BSP |
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22982 |
52.8 GPM 200 L//min |
3000 PSI 207 bar |
1" BSP | 1" BSP | 3/4" BSP |
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22983 |
66 GPM 250 L/min |
800 PSI 55 bar |
1" BSP | 1" BSP | 3/4" BSP |
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22983-30 |
66 GPM 250 L/min |
800 PSI 55 bar |
1" BSP | 1" BSP | 3/4" BSP |
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23270 |
6.6 GPM 25 L/min |
3000 PSI 207 bar |
1/2" FNPT | 3/8" MNPT | Internal |
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23270H |
6.6 GPM 25 L/min |
3000 PSI 207 bar |
1/2" FNPT | 3/8" MNPT | Internal |
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23275 |
6.6 GPM 25 L/min |
2000 PSI 140 bar |
1/2" FNPT | 3/8" MNPT | Internal |
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23275H |
6.6 GPM 25 L/min |
2000 PSI 140 bar |
1/2" FNPT | 3/8" MNPT | Internal |
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23280 |
6.6 GPM 25 L/min |
4000 PSI 275 bar |
1/2" FNPT | 3/8" MNPT | Internal |
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23280H |
6.6 GPM 25 L/min |
4000 PSI 275 bar |
1/2" FNPT | 3/8" MNPT | Internal |
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23285 |
6.6 GPM 25 L/min |
2000 PSI 140 bar |
1/2" FNPT | 3/8" MNPT | Internal |
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23285H |
6.6 GPM 25 L/min |
2000 PSI 140 bar |
1/2" FNPT | 3/8" MNPT | Internal |
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23290 |
6.6 GPM 25 L/min |
4000 PSI 275 bar |
3/8" MNPT | 3/8" MNPT | Internal |
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23290H |
6.6 GPM 25 L/min |
4000 PSI 275 bar |
3/8" MNPT | 3/8" MNPT | Internal |
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23295 |
6.6 GPM 25 L/min |
2000 PSI 140 bar |
3/8" MNPT | 3/8" MNPT | Internal |
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23295H |
6.6 GPM 25 L/min |
2000 PSI 140 bar |
3/8" MNPT | 3/8" MNPT | Internal |
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25150 |
10.5 GPM 40 L/min |
4000 PSI 275 bar |
3/8" BSP | 3/8" BSP | 1/4" BSP |
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22981R-30 |
66 GPM 250 L/min |
2200 PSI 152 bar |
1" BSP | 1" BSP | 3/4" BSP |
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25151 |
10.5 GPM 40 L/min |
3/8" BSP | 3/8" BSP | 1/4" BSP | |
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22981-LF |
66 GPM 250 L/min |
2200 PSI 152 bar |
1" BSP | 1" BSP | 3/4" BSP |
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22090P |
53 GPM 200 L/min |
2200 PSI 150 bar |
1" FBSP | 1" FBSP | 1" FBSP |
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22971C-51 |
35.7 GPM 135 L/min |
1740 PSI 120 bar |
3/4" BSP | 3/4" BSP | 3/4" BSP |