Type VF Flanged Ends

The direct air operated AKO pinch valve is your most practical solution for ON/OFF flow control of abrasive, corrosive and fibrous products including granules, powders and slurries.

The valve consists of a seamless elastomer sleeve enclosed in the valve body and held in place by two bolted end flanges.

The enclosed body design eliminates valve stem packings or seals of conventional valves which can wear out and leak.

The sleeve consists of a special fabric reinforced elastomer designed for high spring back elasticity to assure quick cycling and bubble tight shutoff.

Principle of Operation:

When compressed air or a suitable fluid, at approx. 30 psi above line pressure, is applied to the valve body the valve can be fully closed, or “pinched off”, forming a tight seal even on fibrous and or granular materials.

When the external pressure on the sleeve is released the sleeve will again snap back to its original fully open position.

Advantages:

• Free passage of solids in either direction and no plugging
• Complete shut-off with liquids and suspended solids
• No packing, seals or bearings required
• Light weight, easily maintained
• Negligible pressure drop
• Only one wear part
• Self cleaning

Sizes available:

1-1/2”, 2”, 3”, 4”, 5”, 6”, 8” and 10”
Flange hole pattern according to ANSI 150# or DIN PN 10/16.

Materials of Construction:

Body: • Light weight aluminum

Flanges: Your choice of:

• Aluminum
• Aluminum with carbon steel bushing
• Aluminum with stainless steel bushing
• Aluminum with elastomer flange liner

Sleeves: Available in a variety of materials compatible with the application, including:

• Natural gum rubber - abrasion resistant
• Natural gum rubber - food grade
• Natural gum rubber - high temperature
• EPDM - standard
• EPDM - food grade
• Viton®
• Silicone
• Nitrile - standard
• Nitrile - food grade, light or dark
• Neoprene®
• Hypalon®
• Butyl

Pinch Valve Operating Conditions:

Max. product temperature: 176°F to 266°F based on material of sleeve
Max. line pressure: up to 6” - 90 psi; 8” - 60 psi; 10” - 30 psi

Pinch Valve Accessories:

To operate and control the pinch valve a wide assortment of accessories is available including:

• Solenoid air valves
• Pilot air valves
• Quick exhaust valves
• Exhaust mufflers
• Pressure regulators
• Regulator/filter units
• Proportional pressure regulators

Pinch Valve Applications:

• Food
• Water
• Chemical
• Agriculture
• Pharmaceuticals
• Pneumatic conveying
• Powder painting systems
• Ceramics, glass and plastics
• Sewage and Water treatment
• Power plants and coal slurries
• Cement, lime and aggregate plants
• Mining sludges, sand and waste liquids
  and for any material streams where flowables such as liquids, pastes, slurries, powders, granules, pigments and other materials are pumped, blown, pushed, metered or flow by gravity through pipelines.