Patent ID: 7533697

Claim:
A valve assembly comprising: a valve body having a first supply inlet, a second supply inlet, and a supply outlet; a first supply valve including a first supply plunger which is electrically movable between a position whereat the first supply inlet communicates with the supply outlet and a position whereat the first supply inlet is sealed from the supply outlet; a second supply valve including a second supply plunger which is electrically movable between a position whereat the second supply inlet communicates with the supply outlet and a position whereat the second supply inlet is sealed from the supply outlet; and an override device manually movable to a first override position, whereat the first supply inlet communicates with the supply outlet, and to a second override position, whereat the second supply inlet communicates with the supply outlet; wherein the valve body additionally comprises a return inlet, a first return outlet, and a second return outlet; wherein the valve assembly additionally comprises a first return valve comprising a first return plunger which is electrically movable between a position whereat the first return outlet communicates with the return inlet and a position whereat the first return outlet is sealed from the return inlet, and a second return valve comprising a second return plunger which is electrically movable between a position whereat the second return outlet communicates with the return inlet and a position whereat the second return outlet is sealed from the return inlet; and wherein, when the override device is in the first override position, the first return outlet communicates with the return inlet and, when, the override device is in the second override position, the second return outlet communicates with the return inlet.