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A modular valve field convertible between a wet and dry configuration including a valve body and a passage within the valve body for allowing fluid to flow therethrough. A valve seat and clapper are positioned within the valve body. The clapper is allowed to pivot between a first position wherein th

A modular valve field convertible between a wet and dry configuration including a valve body and a passage within the valve body for allowing fluid to flow therethrough. A valve seat and clapper are positioned within the valve body. The clapper is allowed to pivot between a first position wherein the clapper is sealingly engaged with the valve seat and a second position wherein the clapper is spaced from the valve seat to allow fluid to flow through the valve. The operator controls the position of the clapper with respect to the valve seat. An operator securely retains the clapper in the first position in a first mode of operation and allows the clapper to freely move between the first and second positions in a second mode of operation. A controller governs the position of the clapper with respect to the valve seat when the operator is in the second mode of operation. The controller has a set position wherein the clapper is maintained in the first position and an activated position wherein the clapper is free to move between the first and second positions.

대표청구항 ▼

A valve for a dry piping system, said valve comprising: a valve body including an inlet for being in fluid communication with a fluid source and an outlet for being in fluid communication with an outlet conduit; a passage within said valve body interconnecting said inlet and said outlet for allowing

A valve for a dry piping system, said valve comprising: a valve body including an inlet for being in fluid communication with a fluid source and an outlet for being in fluid communication with an outlet conduit; a passage within said valve body interconnecting said inlet and said outlet for allowing fluid to flow through said valve body between said inlet and said outlet; a valve seat positioned within said valve body in alignment with said passage for allowing fluid to flow therethrough; a clapper positioned within said passage; hinge means interconnected between said valve body and said clapper for allowing said clapper to pivot between a first position wherein said clapper is sealingly engaged with said valve seat to prevent fluid from flowing between said inlet and said outlet and a second position wherein said clapper is Spaced from said valve seat to allow fluid to flow from said inlet toward said outlet; a latch positioned proximate said clapper, said latch being movable between a locked position wherein said latch engages said clapper when said clapper is in said first position and an unlocked position wherein said latch is spaced from said clapper when said clapper is in said second position; an actuator member mounted on said valve body and extending into said passage such that said actuator member engages said latch, said actuator member being movable between a set position wherein said latch is maintained in said locked position and an activated position wherein said actuator member is moved to said unlocked position, said actuator member being a double acting piston mechanism having a piston secured to a piston rod, said piston and piston rod being reciprocally mounted within a cylinder, said piston rod being in engagement with said latch, said cylinder having a first inlet for allowing fluid to flow into said cylinder on a head side of said piston and a second inlet for allowing fluid to flow into said cylinder on a rod side of said piston; and force applicator means for applying a first force to said actuator member to move said actuator member from said activated position to said set position and to maintain said actuator member in said set position wherein said clapper and latch are in said first and locked positions, respectively, and for applying a second force to said actuator member to move said actuator member from said set position to said activated position and to maintain said actuator member in said activated position wherein said clapper and latch are in said second and unlocked positions, respectively.