Specifications

Item Features

• Standard Apollo™ high performance butterfly valves are rated for 29 in Hg vacuum
• Seat retainer- Reliable multi-bolt retainer holds and supports the seat
• Corrosion protection - Polyamide epoxy primer with high performance polyurethane topcoat is the standard finish for carbon steel valve bodies
• Stem (blow-out proof) - 17-4 PH stainless steel stem with high strength, and good corrosion resistance, designed per API 609 standard
• Anti-extrusion ring (under stem seals) - Prevents the extrusion of stem seals, maintaining optimum seal
• Bearing (lower and upper) - Full length provides maximum stem support
• Seat - An advanced free floating, pressure assisted, solid seat design provides an interference and pressure assisted seal
• Tangential disc pins - 17-4 PH stainless steel disc pins are tangentially positioned, placing them in compression rather than shear
• Thrust ring - Centers the disc, ensures tight shut-off and long service life, made of 316 stainless steel
• Graphite seal seat, PTFE end cap seal/stem packing
• TFM/inconel, graphite seal (fire safe) seat
• Standard Apollo™ special service
• Double offset high performance butterfly valve
• ISO 5211 mounting flange - universal mounting dimensions simplify valve actuation
• Rocker packing gland - Shaped packing gland compensates for uneven adjustment of gland nuts
• Extended neck - Allows for 2 in of pipe insulation
• Positive cast disc stop - Prevents seat damage from over-travel of the disc beyond the closed position
• Jacking taps - Allows the use of seat retainer bolts to aid in retainer removal