Unloader valves
Unloader valves control the pressure-washing circuit and divert flow into a bypass path according to their design. Select the exact valve for the pump, gun and bypass arrangement.
Product sorting
List of products
High-pressure unloader valve in AISI 316 stainless steel. Rated for 250 bar and 30 l/min. Ideal for saltwater, demineralised water, and aggressive chemical applications.
High-temperature unloader valve by Hawk with brass body and special seals. Handles 210 bar, 25 l/min, and continuous operation up to 85 °C. Ideal for hot water cleaning in food,...
Hawk brass unloader valve with dual high-pressure inlets and by-pass outlets. Handles 25 l/min and 210 bar. Ideal for pressure washers and self-service car wash systems.
HAWK brass unloader valve for high temperatures, rated for 210 bar, 50 l/min, and continuous operation up to 85 °C. Ideal for fixed hot water cleaning systems in food, chemical,...
HAWK unloader valve rated for 210 bar and 50 l/min. Designed for car wash gantries, fire-fighting systems, and urban cleaning vehicles.
HAWK unloader valve in stainless steel, rated for 500 bar and 80 l/min. Built for demanding industrial cleaning, sandblasting, and paint removal systems.
Interpump brass unloader valve with dual by-pass outlets. Handles 41 l/min and 200 bar. Designed for pressure washers and self-service car wash systems.
Compact Interpump unloader valve with zero-pressure function. Handles up to 250 bar and 41 l/min. Ideal for pressure washers and self-service car wash systems.
KOTHAR unloader valve made from AISI 316 stainless steel, rated for 250 bar and 70 l/min. Compatible with salt water, demineralized water, and aggressive chemicals; ideal for...
Durable Kranzle pressure control valve with 3/8" F connection, rated up to 250 bar. Ideal for regulating water pressure in high-pressure cleaning systems across industrial and...
High-Pressure Unloader Valves for your installation
An unloader must be matched to the pump’s delivery and the way the trigger gun controls flow. Pressure-actuated and flow-actuated designs can behave differently. Check the installation diagram rather than choosing only by maximum pressure.
What to check before ordering
- Rated pressure, flow and permitted water temperature.
- Inlet, outlet and bypass connections.
- Valve operating principle and compatibility with the trigger gun.
- Bypass routing and any integrated pressure switch or gauge connection.
Compare the available valve types before selecting a replacement. Send the existing valve model, pump flow, working pressure and connection details if you need help identifying a suitable version.
