Williams 112211 WM320A Amplifying Relay

Complementing the WM-101, this new valve reduces transmission time of the control signal from the truck to trailer and from trailer to trailer''' particularly critical in combinations with more than one trailer. By using the exclusive ejector principle a fresh application signal is sent to the next trailer in lieu of the '''tired''' truck signal. Fast release of trailer brakes is provided by an individual quick release port. Relay type construction dead ends the tractor application signal, providing breakaway protection for each vehicle.

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