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 Inflatable
Seated Butterfly Valves
Series 585, 586
Heavy Duty
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 can be used resulting in lower overall valve cost.
In actual comparison tests and documented field applications, the Posi-flate butterfly valve outperformed all other 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 has been designed for heavy duty applications and higher operating pressures. Standard valve sizes range from 2" (50mm) to 30" (800mm) and fit both ANSI and metric flanges. A full line of actuators, limit switches and controls are available to suit individual applications.
Performance
Features
- Heavy duty
- 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 buildup
- Double shaft seals
- Multiple bearings
- Fail-safe monitoring
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Temperature
limits:
-40° to 300° F (-40° to 150° C), varies with
application and materials of construction.
Air
supply: 135 psig (9.3 bar) maximum to seat, varies with application.
Working
pressure: Full vacuum to 150 psig (10.3 bar) depending on application and materials of construction.
Operating
torque: Varies
with application.
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Available
Materials of Construction
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Housing: Cast iron, stainless steel,
aluminum, nickel-plated cast iron, epoxy coated cast iron, nylon
coated cast iron
Resilient Seat: EPDM, Buna-N, polyurethane, fluoroelastomer, FDA silicone, FDA white Buna-N, FDA white EPDM, FDA white fluoroelastomer
Disc: Cast iron, 316 stainless
steel (satin or polished), molded nylon. PTFE, nickel and nylon
coating available
Bearings: Polymer, bronze
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Disc Screws: Carbon steel, stainless steel
Shaft: Zinc-plated carbon steel,
316 stainless steel
Shaft Seal: Buna-N, fluoroelastomer
Housing Gasket: Buna-N (Series 586)
Retaining Ring: Carbon steel, stainless
steel
Housing Bolts: Carbon steel, stainless
steel
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