Less friction,low torque,less wear,longer life.

Posi-flate’s unique butterfly valve designuses air pressure to expand the seat againstthe disc, providing even pressure distribu- tion for a bubble-tight industrial seal, every time.Because the seat makes only casualcontact with the disc during valve opening and closing, there is minimal disc impinge-ment. This is in contrast to conventionalbutterfly valves where disc impingement leads to shaving of the seat, decreasing theoverall performance and valve life.Substantially less torque is required to openand close the Posi-flate butterfly valve, thusa smaller actuator can be used resulting inlower overall valve cost.In actual comparison tests and documentedfield applications, the Posi-flate butterflyvalve outperformed all other valves. In fact, a Posi-flate valve life of one to three millioncycles, even in extremely abrasive applica-tions, is not uncommon. For dry solids, gases and slurry applications, the Posi-flateinflatable seated butterfly valve is unsurpassed.Standard valve sizes range from 2" (50mm)to 30" (750mm) and fit both ANSI and metricflanges. A full line of actuators, limit switchesand controls are available to suit individual applications.

How it works

Closed, unsealed As the valve rotates into the closedposition, the disc makes onlycasual contact with the seat,reducing friction, wear and torquerequirements.

Performance Features

•Inflatable seat compensates fordisc 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 abrasiveand dry solids?Disc designed to preventmaterial buildup?Double shaft seals?Multiple bearings ?Fail-safe monitoring

Closed, sealed After the valve is closed, the seatinflates against the disc providingmore sealing surface and an evenpressure distribution against thedisc. Open, unsealed Before the valve opens, the seat isfirst deflated. The disc is then freeto rotate to the open position.