Patent ID: 7673695

Claim:
A valve for an automatic sprinkler system, the valve comprising: a main chamber having an input port for receiving fluid from a supply line and further having an output port; a clapper assembly installed in the main chamber for sealing the input port, the clapper assembly comprising: a threaded valve seat configured to be screwed into a wall of the main chamber, so as to be in communication with the input port; a collar configured to receive the valve seat therethrough, wherein the collar is separately positionable with respect to the valve seat and is held in position by the valve seat; a clapper configured to seal the input port, in cooperation with the valve seat, the clapper being hinged to the collar; and a lever hinged to the collar and movable between a first position in which the clapper is held closed by the lever and a second position in which the clapper is allowed to open; and a sensing chamber comprising components responsive to a control pressure of the sensing chamber, the components being in communication with the lever to move the lever between the first position and the second position.