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    Wafer Style Butterfly Valve, 4" Size, 221 Series

    Keystone Series 221 Butterfly Valves feature rugged quality construction. Lockable handles. Maximum flow area for use in on/off as well as throttling control applications. Standard seat is EPDM with Buna available (both FDA rated). The bonded seat is designed to completely isolate the valve body parts from the liquid. Rounded, hand polished disc and hub edge give full concentric seating without seat obstruction, providing maximum seat life.

    Note: These valves have a molded-in resilient non-replaceable seats; suitable for full vacuum applications. (For buna seals add "B" suffix).


    Stem: 416 Stainless Steel
    Disc: 316SS Stainless Steel
    Body: Cast Iron
    Seat: EPDM
    W.P. Rating: 250 PSI
    Vacuum Rating: Full

    Temperature Range: -20 Deg. F to +250 Deg. F
    Pressure: to 250 PSI
    These valves have a molded-in resilient non-replaceable seats; suitable for vacuum applications.

    Viton® is a registered trademark of DuPont Performance Elastomers
    SKU: KE906-40
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