Importance

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Abstract

A valve for water treatment equipment and characterized by an elongated chamber divided into sections interconnected by passages surrounded by longitudinally aligned valve seats. A valve stem supporting a pair of valve heads is longitudinally movable toward a service position, in which the valve heads cooperate with the valve seats to direct water from a supply port to an inlet port to the water treatment equipment, and from the outlet port of such equipment to a distribution port. The valve stem is also movable to a by-pass position in which the valve heads co-operate with the valve seats to by-pass water from the supply port around the water treatment equipment. The valve stem is threadably advanced so that the rate of water flow can be closely adjusted. The valve is readily adapted for use in backwashing, one embodiment utilizing a bonnet threadably mounted in the valve and rotatable to convert the valve by-pass position to a backwash position.

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First Claim