805Y, 805YD 21/2”-10”.

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Presentation transcript:

805Y, 805YD 21/2”-10”

Modification Overview 805Y- (1973-1988) Cast Iron body- Threaded in seats- Internal check parts are epoxy coated iron. 805YD- (1988-present) Ductile iron body- Bolted in seats- Internal check parts are stainless steel.

Check Cover Removal Cover is o-ring sealed. 21/2-3” cover is spring loaded. * Hold cover firmly while removing bolts. 4-10” Loosen bolts ½”. Spring load is now released from the cover and retained by the check assembly. * Verify spring load before removing all the bolts.

Check Valve Removal Center stem guided check assembly. 21/2-3” spring, stem, and disc holder are free once cover is removed. 4-10” disc & spring subassembly. Slide subassembly straight out of seat and body.

Check Seat Removal 805YD series seats are o-ring sealed and bolted into the body. Remove bolts and pull seat straight out of body. Inspect the plastic guide bushing in center of seat. ** (805Y) series seats are threaded into the body.

Check Disc Replacement Unthread the nut from the stem and remove disc retainer. ** For model (805Y) spring tension may have to be released to replace disc. Consult service center.

Check Valve Reassembly Notes Reassemble in reverse order. Apply lubricant to o-rings. 21/2-3” Models- inspect and clean the plastic guide in the check cover.