Page 15 - Apollo - Butterfly Valves: Resilient Seated & Doubled Offset High Performance
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BUTTERFLY VALVES – Double Offset High Performance



           Advantages

             ISO 5211 Mounting Flange                                         Stem (blowout proof)
             Universal mounting dimensions                                    17-4 PH stainless steel stem with
             simplify valve actuation. Allows for                             high strength, and good corrosion
             direct mounting of several actuators.                            resistance.  Designed per API 609
                                                                              standard.
            Rocker Packing Gland
            Shaped packing gland compensates
            for uneven adjustment of gland nuts.
                                                                              Anti-Extrusion Ring (under stem seals)
                        Stem Packing                                          Prevents the extrusion of stem seals,
                        V-ring PTFE or flat graphite                          maintaining optimum seal.
                        provides positive sealing.
                                                                              Bearing (upper)
                           Extended Neck                                      Full length provides maximum stem
                           Allows for 2” of                                   support. Made of 316 SS/PTFE
                           pipe insulation.

            Body                                                          Seat
            Robust one-piece casting in WCB                               An advanced free floating, pressure assisted, solid
            carbon steel or CF8M stainless steel.                         seat design provides an interference and pressure
            Available in wafer & lug style.                               assisted seal. This creates a positive seal under
                                                                          both low and high pressure requirements. The
                                                                          seat does not rely on any secondary components
                                                                          to hold it in place, assuring longer service life with
                                                                          less maintenance.

            Positive Cast
            Disc Stop
            Prevents seat damage
            from over-travel of the
            disc beyond the closed                                              Tangential Disc Pins
            position. (not visible)                                             17-4 PH stainless steel disc pins are
                                                                                tangentially positioned, placing them
                                                                                in compression rather than shear.  This
            Jacking Taps                                                        robust joint design eliminates potential
            Allows the use of seat                                              failure of the disc-stem connection.
            retainer bolts to aid in
            retainer removal.
                                                                                Disc
                                                                                Standard material is 316 stainless steel.


            Seat Retainer
            Reliable multi-bolt retainer holds                              Bearing (lower)
            and supports the seat.  Standard                                Full length provides maximum stem support.
            valves are suitable for bi-directional                          Made of 316 SS/PTFE
            dead-end service at the full pressure-
            temperature rating of the valve.
            Same material as body material.
                                                                            Thrust Ring
                                                                            Centers the disc.  Ensures tight shutoff
               Corrosion Protection                                         and long service life.  Made of 316 SS.
               Polyamide epoxy primer with high
               performance polyurethane topcoat                             End Cap Seal
               is the standard finish for carbon steel                      Made of PTFE or graphite.
               valve bodies.


                       For additional information, submittal sheets and manuals, visit www.apollovalves.com
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                       Customer Service (704) 841-6000
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