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Introducing PH5 – the Newest Member of the PowerHalt Family

PowerHalt's PH5 Air Intake Emergency Shut-Off Valve is the newest member of the PowerHalt family. This newly improved valve is designed using the best aspects of PH2 and PH3 PowerHalt line of products. It is electrically activated and available in an automatic engine speed sensing model where shutdown occurs if engine speed exceeds a pre-set speed (or by manual override). Alternatively, a manual control configuration is available where an operator or external input will activate emergency engine shut-down.

PH5 Highlights

  • Universal Applications
  • 1.75" to 5.0" sizes available
  • Operator friendly automatic operation with manual reset and override
  • High temperature design for challenging thermal applications
  • Rigorous vibration, corrosion & endurance testing
  • Low power consumption with smart control
  • In compliance with CSA B621-14 & B622-14
  • 2 Hour installation times, low part count

PH5 Specifics

  1. Large Visible Reset Knob
  2. Electrical Activation Options
  3. Valve Position Feedback (optional)
  4. Corrosion Resistant Materials
  5. Maintenance Free Butterfly Valve Design
  6. 12 VDC or 24 VDC Systems
  7. 1.75-5” Valve Sizes Available

PH5 Control Options & Components

  1. POWERGUARD CONTROLLER (AUTOMATIC) Monitors engine speed through a gear tooth sensor mounted to the transmission bell housing using an existing auxiliary port or by the drilling and tapping of a new port. The controller has a programmable trip point – when the programmed pre-set speed is exceeded, emergency engine shutdown will occur automatically. Emergency shutdown can be activated at any time through a manual override switch
    ■ Automatically activates after programmable engine speed trip point is exceeded
    ■ Manual override from cab/panel mounted switch
  2. TOGGLE SWITCH Military style switch with safety cover to prevent false trip hazards. Provides a manual means to shutdown the engine or test the valve
  3. MAGNETIC PICK-UP Measures flywheel RPM and sends a signal to shut down the engine when engine runaway occurs
  4. PANEL INDICATOR LIGHT Get instant notification on the status of your PowerHalt valve with this LED panel indicator warning light for your dash (optional)

PH5 Kits Include:

  • All necessary hose adapters, clamps, and hardware required for an install
  • Weather tight plug & play wiring harness. Easy to install kits for universal applications
  • Control option available with PowerGuard automatic overspeed limiter and manual reset


Is this application operated offshore or on ground?

Offshore applications may have specific regulations for your equipment. Corrosion is a concern for offshore applications so PowerHalt valves are all corrosion tested to ASTM B117 96Hrs Salt-Fog to ensure product longevity.

Does your engine require dual shut-off valves? (This changes the specification for control)

Large V-engines may require two or more shut-off valves. The automatic reset option is recommended to prevent incidents where only one valve is reopened after a shutdown, preventing engine damage.

Does your application require auxiliary/multiple sources for activation in case of emergency?

The PowerHalt PH5 series can incorporate multiple auxiliary inputs from external sources for activation of the shut off valve in the event of an emergency. Ideal for secondary emergency monitoring systems as well as multiple locations for manual override input.

Warranty Registration

Register your product for warranty HERE.