Suttner ST-261I Unloader Valve with Injector – 200261580

The Suttner ST-261I Unloader Valve with Injector – 200261580 combines reliable pressure regulation with an integrated chemical injector, offering a compact and efficient solution for pressure washer systems. Designed for pressures from 500 to 3625 PSI, this valve automatically diverts water into bypass when the trigger gun is closed, protecting the pump while also delivering cleaning chemicals when required.

With a maximum flow rate of 8 GPM, the integrated injector supports flow ranges between 3.35 and 5.00 GPM, offering precise detergent application without the need for additional equipment. The 1/4\\” FPT bypass port and 3/8\\” FPT inlet/outlet ensure compatibility with standard high-pressure systems.

Built for durability, the ST-261I handles temperatures up to 176°F (80°C) and is ideal for industrial, commercial, and agricultural applications requiring both pressure regulation and chemical injection.

Applications:

• Industrial and commercial pressure washer systems

• Detergent and chemical injection with pressure regulation

• Pump protection during bypass operation

• Agricultural sanitation and fleet cleaning

Features:

• Integrated injector with flow rates from 3.35–5.00 GPM

• Pressure range: 500–3625 PSI

• Max system flow: 8 GPM

• Handles temperatures up to 176°F (80°C)

• 3/8\\” FPT inlet and outlet, 1/4\\” FPT bypass port

• Combines pressure regulation and chemical injection in one compact unit

• Durable, German-engineered construction for reliability

Suttner valves are trusted worldwide for their precision engineering, durability, and seamless performance in demanding high-pressure systems.

Specs:

Product Type: Unloader Valve with Injector
Category: Valves
Brand: Suttner
Part Number: 200261580
Material: Brass/Steel (typical ST-261I construction)
O-Ring: Nitrile (standard – confirm if needed)
Pressure: 500–3625 PSI
Temperature: Up to 176°F (80°C)
Threading In: 3/8\\” FPT
Threading Out: 3/8\\” FPT
Bypass Port: 1/4\\” FPT
System Flow Rate: Up to 8 GPM
Injector Flow Rate: 3.35–5.00 GPM
Weight: 1.40 lb (0.64 kg)