Unloaders
Industrial Duty Pressure Regulating Unloaders for Trigger Gun Applications
A pressure-sensitive unloader is used as a primary pressure control device to set and maintain consistent system pressure while providing an energy and system savings feature that allows the pump to run at low pressure when downstream flow is shut off. An unloader contains a check valve that traps pressure between the closed downstream device (shut-off gun) and the unloader, causing an internal piston to open which allows the pump to unload at low-pressure. When the shut-off gun is opened back up the system will return to operating pressure.
Regulators and unloaders each have their own benefits. Review our Regulator vs. Unloader Video to learn the differences between the two valve types, and which is right for your system.
A wide-range of unloaders is available from Cat Pumps and feature color-coded springs for easy identification. Convert one model to another model simply by substituting the spring.
Product Range:
0.5 to 120 GPM, 100 to 7,250 PSI
Typical usage:
Used for single pump, single or multiple-gun, and nozzle applications.
Materials:
Available in brass, 304 and 316 stainless steel
Elastomers are available in medium nitrile buna (NBR), fluorocarbon (FPM), ethylene proplylene diene monomer (EPDM), and more.
Quick Links
Materials:
Product Literature
| Model | Min Flow | Max Flow | Min Pressure | Max Pressure | Inlet/Discharge Ports | Bypass Ports |
|---|---|---|---|---|---|---|
| 7600S | 2.00 GPM / 8.00 LPM | 5.00 GPM / 19.00 LPM | 700 PSI / 49 BAR | 3500 PSI / 245 BAR | 3/8" NPT(M) / 3/8" NPT(M) | 3/8" NPT(F) |
| 7860 | 3.00 GPM / 7.60 LPM | 5.00 GPM / 19.00 LPM | 700 PSI / 50 BAR | 4000 PSI / 275 BAR | 1/2" NPT(F) / 3/8" NPT(F) | Built-in Channel |
| 7500S | 0.50 GPM / 1.90 LPM | 6.00 GPM / 22.70 LPM | 100 PSI / 7 BAR | 2000 PSI / 138 BAR | 3/8" NPT(M) / 3/8" NPT(M) | 3/8" NPT(F) |
| 7500XS | 0.50 GPM / 1.90 LPM | 6.00 GPM / 23.00 LPM | 100 PSI / 7 BAR | 2000 PSI / 138 BAR | 3/8" NPT(M) / 3/8" NPT(M) | 1/4" Barb |
| 7850 | 0.50 GPM / 1.90 LPM | 6.00 GPM / 23.00 LPM | 100 PSI / 7 BAR | 4000 PSI / 275 BAR | 1/2" NPT(F) / 3/8" NPT(F) | Built-in Channel |
| 7580 | 0.50 GPM / 1.90 LPM | 6.50 GPM / 25.00 LPM | 400 PSI / 28 BAR | 1000 PSI / 69 BAR | 3/8" NPT(M) / 3/8" NPT(M) | 3/8" NPT(F) |
| 7581 | 0.50 GPM / 1.90 LPM | 6.50 GPM / 25.00 LPM | 800 PSI / 55 BAR | 2300 PSI / 158 BAR | 3/8" NPT(M) / 3/8" NPT(M) | 3/8" NPT(F) |
| 7582 | 0.50 GPM / 1.90 LPM | 8.00 GPM / 30.00 LPM | 100 PSI / 7 BAR | 1000 PSI / 69 BAR | 3/8" NPT(M) / 3/8" NPT(M) | 3/8" NPT(F) |
| 7583 | 0.50 GPM / 1.90 LPM | 8.00 GPM / 30.00 LPM | 250 PSI / 18 BAR | 2000 PSI / 138 BAR | 3/8" NPT(M) / 3/8" NPT(M) | 3/8" NPT(F) |
| 7620 | 0.50 GPM / 1.90 LPM | 8.00 GPM / 30.00 LPM | 100 PSI / 7 BAR | 3200 PSI / 220 BAR | 3/8" BSPP(G) / 3/8" BSPP(G) | 3/8" BSP(F) |
| 7691 | 2.50 GPM / 9.50 LPM | 8.00 GPM / 30.00 LPM | 1000 PSI / 69 BAR | 4050 PSI / 280 BAR | 3/8" NPT(F) / 3/8" NPT(F) | 3/8" NPT(F) |
| 7693 | 2.50 GPM / 9.50 LPM | 10.50 GPM / 40.00 LPM | 230 PSI / 16 BAR | 2300 PSI / 160 BAR | 3/8" NPT(F) / 3/8" NPT(F) | 3/8" NPT(F) |
| 7694 | 2.50 GPM / 9.50 LPM | 10.50 GPM / 40.00 LPM | 400 PSI / 28 BAR | 4050 PSI / 280 BAR | 3/8" NPT(F) / 3/8" NPT(F) | 3/8" NPT(F) |
| 7630 | 2.00 GPM / 8.00 LPM | 10.50 GPM / 40.00 LPM | 400 PSI / 28 BAR | 5100 PSI / 350 BAR | 3/8" NPT(M) / 3/8" BSP(F) | 1/2" NPT(F) |
| 7537 | 1.00 GPM / 3.80 LPM | 21.00 GPM / 80.00 LPM | 230 PSI / 16 BAR | 2600 PSI / 179 BAR | 1/2" NPT(F) / 1/2" NPT(F) | 1/2" NPT(F) |
| 7542 | 1.00 GPM / 3.80 LPM | 21.00 GPM / 80.00 LPM | 800 PSI / 55 BAR | 4000 PSI / 275 BAR | 1/2" NPT(F) / 1/2" NPT(F) | 1/2" NPT(F) |
| 7576 | 1.00 GPM / 3.80 LPM | 21.00 GPM / 80.00 LPM | 1500 PSI / 103 BAR | 7250 PSI / 500 BAR | 1/2" BSP(F) / 1/2" BSP(F) | 1/2" BSP(F) |
| 7590 | 10.00 GPM / 38.00 LPM | 52.00 GPM / 200.00 LPM | 400 PSI / 28 BAR | 2175 PSI / 150 BAR | 1" NPT(F) / 1" NPT(F) | 1" NPT(F) |
| 7592 | 10.00 GPM / 38.00 LPM | 52.00 GPM / 200.00 LPM | 450 PSI / 31 BAR | 2500 PSI / 175 BAR | 1" NPT(F) / 1" NPT(F) | 1" NPT(F) |
| 7593 | 10.00 GPM / 38.00 LPM | 52.00 GPM / 200.00 LPM | 750 PSI / 51 BAR | 4050 PSI / 280 BAR | 1" BSPP(G) / 1" BSPP(G) | 1" BSPP(G) |
| 9950 | 50.00 GPM / 190.00 LPM | 120.00 GPM / 456.00 LPM | 100 PSI / 7 BAR | 2900 PSI / 200 BAR | 1 1/4" BSP(F) / 1 1/4" BSP(F) | 1 1/2" BSP(F) |
| Model | Min Flow | Max Flow | Min Pressure | Max Pressure | Inlet/Discharge Ports | Bypass Ports |
|---|---|---|---|---|---|---|
| 7501 | 0.50 GPM / 1.90 LPM | 6.00 GPM / 23.00 LPM | 100 PSI / 7 BAR | 2000 PSI / 138 BAR | 3/8" NPT(M) / 3/8" NPT(M) | 3/8" NPT(F) |
| Model | Min Flow | Max Flow | Min Pressure | Max Pressure | Inlet/Discharge Ports | Bypass Ports |
|---|---|---|---|---|---|---|
| 9970 | 0.00 GPM / 0.00 LPM | 15.90 GPM / 60.00 LPM | 1160 PSI / 80 BAR | 11600 PSI / 800 BAR | 1/2" BSPP(G) / 1/2" BSPP(G) | 1/2" BSPP(G) |
| 7531 | 1.00 GPM / 3.80 LPM | 21.00 GPM / 80.00 LPM | 400 PSI / 28 BAR | 2200 PSI / 155 BAR | 1/2" NPT(F) / 1/2" NPT(F) | 1/2" NPT(F) |
| 7533 | 1.00 GPM / 3.80 LPM | 21.00 GPM / 80.00 LPM | 800 PSI / 55 BAR | 4000 PSI / 275 BAR | 1/2" NPT(F) / 1/2" NPT(F) | 1/2" NPT(F) |
| 7536 | 1.00 GPM / 3.80 LPM | 21.00 GPM / 80.00 LPM | 3000 PSI / 207 BAR | 6000 PSI / 414 BAR | 1/2" NPT(F) / 1/2" NPT(F) | 1/2" NPT(F) |