Specifications Summary
Maximum Pressure: 3,625 PSI (250 bar)
Flow Rate: Up to 8 GPM
Minimum Trigger Pressure: 500 PSI (approx.)
Maximum Temperature: 176°F
Inlet & Outlet Ports: 3/8″ FPT
Bypass Port: 1/4″ FPT
Construction: Forged brass body with stainless steel internals
Seals: PTFE and Viton for chemical and heat resistance
Integrated Micro-Switch: Yes
Product Description
The Suttner ST-261/S Unloader Valve is a precision-engineered pressure regulation and bypass valve designed for professional high-pressure cleaning systems. Built to handle up to 3,625 PSI and 8 GPM, this unloader delivers reliable performance and long-term durability in demanding commercial and industrial wash applications.
Its forged brass body and stainless-steel internal components ensure superior corrosion resistance, while PTFE and Viton seals maintain integrity under high temperature and chemical exposure. The straight-through flow design minimizes pressure drop and turbulence, providing smoother operation and consistent system pressure.
Equipped with an integrated micro-switch, the ST-261/S enables electrical system control—ideal for setups that require automatic shut-off or motor control based on trigger operation.
Key Features
Professional-grade pressure regulation and bypass design
Straight-flow configuration for reduced pressure loss
Integrated micro-switch for electrical or motor control systems
Long-lasting seals and materials for chemical resistance
Smooth operation under continuous use
Protects pump and system by diverting excess flow
Ideal Applications
Commercial pressure washers and mobile wash rigs
Industrial cleaning systems
Wash bays and fleet maintenance setups
Any high-pressure system requiring electrical control or automatic bypass protection
Specifications Summary
Maximum Pressure: 3,625 PSI (250 bar)
Flow Rate: Up to 8 GPM
Minimum Trigger Pressure: 500 PSI (approx.)
Maximum Temperature: 176°F
Inlet & Outlet Ports: 3/8″ FPT
Bypass Port: 1/4″ FPT
Construction: Forged brass body with stainless steel internals
Seals: PTFE and Viton for chemical and heat resistance
Integrated Micro-Switch: Yes
Product Description
The Suttner ST-261/S Unloader Valve is a precision-engineered pressure regulation and bypass valve designed for professional high-pressure cleaning systems. Built to handle up to 3,625 PSI and 8 GPM, this unloader delivers reliable performance and long-term durability in demanding commercial and industrial wash applications.
Its forged brass body and stainless-steel internal components ensure superior corrosion resistance, while PTFE and Viton seals maintain integrity under high temperature and chemical exposure. The straight-through flow design minimizes pressure drop and turbulence, providing smoother operation and consistent system pressure.
Equipped with an integrated micro-switch, the ST-261/S enables electrical system control—ideal for setups that require automatic shut-off or motor control based on trigger operation.
Key Features
Professional-grade pressure regulation and bypass design
Straight-flow configuration for reduced pressure loss
Integrated micro-switch for electrical or motor control systems
Long-lasting seals and materials for chemical resistance
Smooth operation under continuous use
Protects pump and system by diverting excess flow
Ideal Applications
Commercial pressure washers and mobile wash rigs
Industrial cleaning systems
Wash bays and fleet maintenance setups
Any high-pressure system requiring electrical control or automatic bypass protection
