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A highly engineered valve with extensive testing and validation

An extensively tested, inexpensive and easy to operate valve. PowerHalt’s PH2 comes with various control and actuation options that cover a broad range of industry applications & requirements. Custom kits are available for most pickup truck applications.

PH2 Highlights

  • Universal applications
  • 2.8" to 5.5" sizes available
  • Designed for extreme environments
  • Rigorously tested with zero leakage
  • Rigorous vibration, corrosion and endurance testing
  • A complete installation all in one box
  • Easy installation times and low part count
  • Truck/Engine kit cross reference guides for easy kit specification
  • In compliance with CSA B621-14 & B622-14

PH2 Specifics

  1. Large visible reset knob
  2. Electrical, pneumatic & manual activation options
  3. Corrosion resistant materials
  4. Innovative sealing systems
  5. 12 VDC or 24 VDC systems
  6. 2.8"-5.5" valve sizes available

PH2 Control Options

PH2 PowerHalt air intake emergency shut-off valves range from basic manual pull cable valves to fully automatic manual reset systems.

  1. PowerGuard is an intelligent controller that offers hands-free activation. Monitors various engine inputs and automatically activates the shut-off valve, stopping the engine, when the predetermined set points are reached
  2. Military style toggle switch with safety cover to prevent false trip hazards. Provides a manual means to shutdown the engine or test the valve

PH2 Kits Include:

  • All necessary hose adapters, clamps, and hardware required for an install
  • Weather tight plug & play wiring harness, custom to each application
  • Easy Install

Technical Support

Troubleshooting the Magnetic Speed Sensor for PowerHalt Shut-Off Valves

Jason will be guiding you through troubleshooting the magnetic speed sensor included with your PowerHalt Air Intake Emergency Shut-Off Valve by Pacbrake.

FAQs and Troubleshooting

How do I know if my valve is closed?

All of the manual reset PowerHalt Shut-Off Valves (PH1, PH2, PH5) have a large red reset knob which indicates the position of the flap within the valve. The PH2 and PH5 shut-off valves also have an option to include a microswitch as an electronic indicator of valve position.

The switch is available in Normally Open and Normally Closed configurations. The wiring from the switch can be led to a panel light or fed directly into your equipment systems.

How much power does my PowerHalt system require?

Electronic activation PowerHalt systems can be powered by 12 or 24 VDC. Manual activation kits are specific to either 12 or 24 VDC whereas the automatic activation kits are universal to either power source.

Once connected to power, manual activation kits will draw near 0mA of current while automatic activation kits will draw 30-35mA at idle.

Can I use my PH2 PowerHalt system to protect my auxiliary PTO/work-mode equipment?

No, you can't

How do I choose my PowerHalt air shut-off valve trip speed?

If you have control over the engine speed: choose to set your trip speed at 30% above the engine rated RPM. Refer to your programming manual for set-up procedure.

If your engine runs at a constant speed: you can choose to set your trip speed at 10, 20, or 30% above the constant engine speed. Refer to your programming manual for set-up procedure.

Can manual reset be achieved easily and without placing workers at risk?

Frequent security checks may prove cumbersome when manually resetting a valve if it is difficult to access. Automatic reset are better suited for these applications. Routing of the switch or pill cable is an important consideration to make. Pull cable are a great low cost option if your application and regulations allow.

What air pressures of a compressed air source are required for a Pneumatic Air Shut-Off Valve?

Pneumatically actuated valves require an air source of 60 psig (minimum) to 145 psig (maximum)

Can the valve incorporate multiple auxiliary inputs from an external source?

No, the PH2 configuration can't. You will need a PH3 air shut-off valve for this particular requirement

What can I do about an offset flywheel?

In some cases, the factory sensor port on the bellhousing does not line up directly over the flywheel teeth. The sensor port may give a partial view of the flywheel which is offset by a gap or a machined edge. It is possible that a threaded speed sensor will not be able to sense speed from an offset flywheel.

Pacbrake recommends first installing the sensor into the port and checking if the system is able to read speed. You can check that the sensor is detecting speed by proceeding to Set and Test a Trip Speed. If setting and testing occur successfully, the sensor is able to read speed.

If the sensor cannot read speed, contact Pacbrake Support for an offset adapter (P/N: C50136) and a 3/8”-20 gear tooth speed sensor. The offset adapter is a sleeve with a 3/4”-16 external thread and a 3/8”-20 hole drilled off-center to allow the smaller sensor to be positioned directly over the offset flywheel teeth.

A more immediate solution would be to drill and tap a new sensor port in the correct position on the bell housing.

Warranty Registration

Register your product for warranty HERE.