Suttner ST-265 Unloader Valve 350 Bar 50 LPM

Product Overview

The Suttner ST-265 Unloader Valve is a professional pressure-regulating valve designed for demanding industrial pressure washer systems. Manufactured in Germany, it handles working pressures up to 350 bar, flow rates up to 50 LPM, and water temperatures up to 80°C.

The ST-265 automatically diverts water through the bypass when the trigger gun is closed or the preset pressure is reached. This protects the high-pressure pump from excessive pressure while helping maintain reliable and consistent system performance.

Its patent-pending design incorporates a fatigue-resistant spring and high-grade stainless steel and ceramic valve components for excellent durability. The adjustable pressure setting allows the valve to be configured for different pressure washer installations and operating requirements.

Suitable for professional pressure washer repairs, replacement installations and custom-built Motor Pump Unit (MPU) systems.

Key Features

• Maximum working pressure of 350 bar
• Maximum flow rate of 50 LPM
• Adjustable pressure setting
• Automatically diverts water through the bypass
• Helps protect the pump against excessive pressure
• Fatigue-resistant spring for dependable operation
• Stainless steel and ceramic internal valve components
• Durable brass valve body
• Designed for straightforward servicing and maintenance
• Suitable for heavy-duty industrial pressure washer systems
• Manufactured in Germany

Technical Specifications

Applications

The Suttner ST-265 is suitable for:

• Industrial pressure washers
• Static pressure washer systems
• Mobile cleaning equipment
• Motor Pump Unit (MPU) pressure washers
• Replacement and repair installations
• Bespoke high-pressure cleaning systems

Important Installation Information

The unloader valve must be correctly selected and adjusted to match the pump’s maximum pressure and flow rate. Incorrect adjustment can damage the pump, hose, trigger gun or other high-pressure components.

If you are unsure whether the ST-265 is suitable for your pressure washer, contact us with your pump model, operating pressure and required flow rate.

Support and Service

Flowjet Cleaning Equipment supplies professional pressure washer components, accessories and spare parts throughout the UK. Technical assistance is available to help you select the correct unloader valve for your equipment.