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 PH5 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.

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

No, the PH5 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.

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