Title: Method for assembling a cartridge-type valve

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Abstract: A check valve comprises a housing defining a valve seat thereon and a valve member reciprocally mounted in the housing to normally engage the seat for blocking fluid flow therepast. Two pairs of split retaining members are mounted in axially spaced relationship on a stem of the valve member and are expanded axially thereon by a compression coil spring for biasing the valve member to its closed position. A stop member is secured on an end of the stem of the valve member to prevent movement of one pair of the retaining members therepast. A slot is formed axially through the stop member and extends partially in the stem of the valve member to expose an end of the spring. In assembling the valve, a tool is inserted into the slot to compress the spring whereby the one pair of retaining members may be mounted on the valve member, between the spring and the stop member. The housing, having the precalibrated check valve mounted therein, may be attached as a unitary cartridge onto a main housing having other valves suitably integrated therein.


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