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Unloaders

Industrial Duty Pressure Regulating Unloaders for Trigger Gun Applications
Unloaders

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 the downstream flow shuts 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, allowing 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 benefits. Review our Regulator vs. Unloader Video to learn the differences between the two valve types and which is suitable 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 propylene diene monomer (EPDM), and more.

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Materials:

Product Literature

Regulator vs. Unloader Valve Operation

Pumps and Accessories Catalog
Brass
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)
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)
316 Stainless Steel
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)
304 Stainless Steel
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)