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Pneumatic Valve Assemblies – Normally Open (NO), Dump Valve, 3 Port

This category includes normally open (NO) pneumatic valve assemblies with a 3-port dump valve design, used in industrial waterjet systems for controlling high-pressure flow. Normally open valves are open by default when no pneumatic signal is present and close when actuated by compressed air, allowing controlled shut-off of flow only when needed. These valve assemblies are common on KMT-style systems and are designed for reliable performance and ease of maintenance.

What’s Included in This Category

  • 3-Port Pneumatic Valve Bodies – Core assembly designed for flow control. 

  • Normally Open Actuator Assemblies – Pneumatic actuators that open/close the valve using air pressure. 

  • Actuator Cylinders & Pistons – Internal mechanical components that generate motion.  

  • Valve Stems & Bearing Discs – Precision parts essential for valve sealing and movement. 

  • Seals, O-Rings & Backup Rings – Replaceable components for maintenance and long-term reliability.

  • Repair Kits & Spare Parts – Kits to support rebuilds and service of pneumatic valve assemblies.

Key Features

  • Normally open (NO) design: Valve stays open without pneumatic pressure and closes when actuated. 

  • 3-port dump valve configuration ideal for reliable flow control in waterjet applications. 

  • Compatible with KMT-style systems and similar high-pressure waterjet setups.

  • Includes both assembly and individual components for installation and maintenance.

Typical Applications

  • Pneumatic control of waterjet cutting heads and systems.

  • Industrial high-pressure waterjet environments requiring reliable valve actuation. 

  • Service, repair, and replacement parts for pneumatic valve assemblies.