Drive Away Prevention for Trailers

EAGLE - Trailer Safety Park Valve with safety interlock.

This safety product is designed to prevent unexpected trailer departure during loading operations, or while trailer mounted equipment is in operation thereby helping protect staff and equipment. In addition, dependant on the type of operation, it can help prevent spillages that may cause environmental pollution.

The Eagle valve is based on our award wining trailer safety park valve, which in addition to the proven safety benefits of this product, has a valuable additional feature that enables it to be locked in the brake applied position by a remote signal, thereby preventing release of the trailer brakes until safe to do so. The Eagle valve may be fitted in place of a conventional park valve or fitted in addition.

When activated, the trailer park brakes are applied (if not already applied) and the Eagle valve remains in the brake applied position until it is safe to allow the brakes to be manually released.

Prior to the availability of the Eagle Trailer Safety Park Valve with Safety Lock Out, some methods used to provide tow away protection have been independent of the trailer park brake control valve and because of this have in many cases introduced the potential for the trailer to be unexpectedly un-braked which is totally unacceptable. When it is safe to release the trailer brakes the Eagle valve is manually operated as a normal park valve. If not safe, the push button will return to the park brake applied position thereby informing the driver that something is not right.

Application examples

The Eagle Safety Park Valve is extremely versatile:

Double-Deck Trailers in a loading bay coupled to an external power source enabling use of the deck lift. When the power lead is connected, an air signal is automatically sent to the Eagle Valve ensuring it remains in the brake applied position thereby preventing the driver from manually releasing the trailer brakes. When the power lead has been safely disconnected, the driver can release the park brake in the normal manner.

Tanker Trailers.
The Eagle valve together with associated controls are installed to allow the discharge gate to be opened only if the park valve is applied, then when the gate is opened a signal is sent to the Eagle valve to lock in the brake applied position until the discharge gate is next closed. This then allows the park valve to be manually operated releasing the trailer brakes, thereby providing a robust safe working procedure.

General Trailer Loading – Safe-T-Load.
A basic system would consist of a shrouded “loading” control switch mounted just inside the trailer door. As soon as the load door is opened, the “loading switch” is operated locking the Eagle valve in the brake applied position. On completion of work and just before the door is closed the “loading switch” is turned off. It is now safe to move the trailer and the driver can now manually operate the Eagle park valve releasing the trailer brakes.

Trailer Mounted Cranes, Machinery, etc.
We would be pleased to discuss your particular requirements. Various options can be incorporated including visual status indicators and audible alert that the trailer is being coupled. The Eagle Safety park brake valve can be purchased separately or with associated controls.

See Also: C-Coupling Lock | Kingpin Lock  | Drive Away Protection for Trucks