Posiflate butterfly valve
- Working pressure: Full vacuum to 10.3 barG.
- Temperatures -40° to 170°C
- Inflatable seat compensates for disc and seat wear
- Longer valve life
- Minimal seat wear
- No disc impingement
- Ultra-low torque requirements
- Lower actuator costs
- More seal contact area
- Proven excellent for abrasive and dry solids
- Disc designed to prevent material build-up
- Double shaft seals
- Multiple bearings
- Fail-safe monitoring
Posiflate - Inflatable Seated Butterfly Valves - Less friction, low torque, less wear, longer life.
Posi-flate's unique butterfly valve design uses air pressure to expand the seat against the disc, providing even pressure distribution for a bubble-tight seal, every time. Because the seat makes only casual contact with the disc during valve opening and closing, there is minimal disc impingement. This is in contrast to conventional butterfly valves where disc impingement leads to shaving of the seat, decreasing the overall performance and valve life.
Substantially less torque is required to open and close the Posi-flate butterfly valve, thus a smaller actuator is used resulting in lower overall valve cost.
In actual comparison tests and documented field applications, the Posi-flate butterfly valve dramatically outperformes all other butterfly valves. In fact, a Posi-flate valve life of one to three million cycles, even in extremely abrasive applications, is not uncommon. For dry solids, gases and slurry applications, the Posi-flate inflatable seated butterfly valve is unsurpassed.
The Posi-flate Series 585/586 inflatable seated butterfly valves are designed for the most severe conditions. The seat is designed for heavy duty applications and higher operating pressures. Standard valve sizes range from 2" (50mm) to 24" (600mm) and fit both ANSI and metric flanges. A full line of actuators, limit switches and controls are available to suit individual applications.
Materials of Construction
Housing: Cast iron, stainless steel, aluminium, nickel-plated cast iron, epoxy coated cast iron, nylon coated cast iron.
Resilient Seat: EPDM, Buna-N, polyurethane, fluoro-elastomer, FDA silicone, FDA white Buna-N, FDA white EPDM, FDA white fluoro-elastomer