Unloader-Suttner ST-261-I

By : Suttner

SKU : 6824
  • Quick Specs
  • Manufacturer: Suttner
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Regular Price: $93.96
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  • Regulating unloader valve
  • Tamper resistant operator adjustable valve which allows limit setting on both maximum and minimum pressure
  • Ideal for steam combination applications
  • Straight flow-through design minimizes pressure loss through valve
  • Working components constructed of high grade stainless steel, teflon, and Viton seals for maximum heat/chemical resistance
  • Internal bypass valve can be easily accessed and repaired without removing unloader from unit
  • True to Suttner design tradition, valve is cartridge type and installed in minutes
  • Pressure adjustment knob can be removed if desired


  • Downstream injection at 10:1 ratio
  • Low pressure limit setting eliminates need of additional metering devices
  • Relies on pressure loss through a restrictive orifice, which is built-in on the ST-261. Restriction AFTER the orifice must be minimized in order for injection to occur. Therefore, this system must incorporate a large orifice spray nozzle which reduces such restriction. The usage of a nozzle with a minimum orifice size of 30.0 is recommended. A smaller nozzle could be used, but the added restriction may result in ineffective suction rates or no suction at all. In addition, remember that elbows, fittings, and even hose add to the restriction within the system and may affect or eliminate the suction capabilities
  • Pressure Range: Up to 3650 PSI
  • Flow Range: 3.35 GPM to 5.0 GPM
  • Temperature: 176 F
  • Inlet: 3/8" FPT
  • Outlet: 3/8" FPT
  • Bypass: 1/4" FPT
  • Gauge Port: 1/4" FPT
  • Weight: 22.5 oz


Warning California Proposition 65
Detectable amount of chemicals known to the State of California to cause cancer, birth defects or other reproductive harm may be found in pressure washing equipment, accessories and exhaust. For More Information Visit www.p65warnings.ca.gov


Manufacturer: Suttner
SKU: 6824
Variant MPN: 200261503

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