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 Stainless Steel Butterfly Valves
Series 486
ANSI
and Metric Flange Compatible
All stainless steel butterfly valve
The Series 486 inflatable seated butterfly valve from Posi-flate features a fully machined 316L stainless steel housing. The single piece disc and shaft is available in a number of materials including 316L stainless steel and hastelloy. The disc may be polished to a mirror finish or coated with PTFE, nylon or other high performance coating.
The stainless steel valve is ideal for powders, granules, slurries and liquids and is available in sizes 2" (50 mm) to 20" (500 mm). Typical applications include loading and unloading of process material, sterile air control, and outlet valves for storage containers or hoppers.
Unique inflatable seat provides better seal, less wear, longer lifes
Posi-flate's unique inflatable seat design provides a better seal by utilizing air pressure to expand the seat against the disc, providing more sealing area and an even pressure distribution against the disc every time. The inflatable seat automatically compensates for wear when it inflates against the disc which extends the valve life considerably.
Torque requirements are substantially lower with the Posi-flate butterfly valve since the disc does not impinge the seat. The smooth profile of the disc provides minimum flow resistance and reduces material build-up.
Performance features
- 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
- 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 350° F (-40° to 175° C), varies with application and materials of construction.
Air
supply:
115 PSIG (7.9 bar) maximum to seat, varies with application.
Working
pressure:
Full vacuum to 100 PSIG (6.9 bar), varies with materials of construction.
Operating
torque: Varies
with application.
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Available
Materials of Construction
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Housing: 316L stainless steel housing with satin finish or polished finish
Disc/shaft: Integral 316L stainless steel disc/shaft with standard satin polish or premium polish; hastelloy disc/shaft; PTFE coating
Seat: White FDA Buna-N, white FDA silicone, white fluoroelastomer, black fluoroelastomer, black EPDM and others
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Bearings: Nylon, bronze or PTFE
Shaft Seal: Buna-N or fluoroelastomer
Housing Gasket: Buna-N or silicone
Hardware: stainless steel
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