Heavy-Duty Aerolock™ Rotary Valve

HD Aerolock Rotary Valve Features

Bearings  |  Rotors  |  Housings  |  Seals  |  Drives    

Gaskets
The gaskets provide a positive seal between Aerolock rotary valve flanges and components directly above and below. They are made of 6 mm [.25 in] thick white neoprene and are comprised of sections that interlock to ensure they stay in place and provide an airtight seal.

Bearings - thrust end
The radial-thrust, tapered roller bearing assembly is preloaded to provide minimum rotor deflection. This results in close rotor clearance to maximize rotary valve wear life.

Bearings - drive end
The radial ball bearing assembly provides firm shaft support on the rotary valve drive end and allows expansion and contraction due to temperature changes along the longitudinal axis.

Seals

• T3 seal
  The general purpose T3 Rotary Valve seal is used on both ends of the rotor shaft. The assembly is comprised of a Teflon® collar anchored to the shaft and two steel-cased quad ring seals which fit over the Teflon collar. The seals remain stationary while the Teflon collar rotates with the shaft. The Teflon’s slick surface allows quad rings to operate in dry mode with good service life.
• Lip seal
  The double lip seal without the Teflon collar provides an inexpensive rotary valve seal for nonabrasive materials. Two steel-cased rubber seals envelope the shaft at both ends.
• Air purge seals
  The air purge seal is for severe service applications. Plant air is introduced through end plates and the air diffuser ring. This provides a zone of higher pressure outside the seals than inside the Aerolock rotary valve. The seal cavity is swept clean toward the inside of the Aerolock, protecting the outboard bearings.
• G5 seals
  The G5 seal is for high service applications and includes a quad ring Buna-N seal on a stainless steel insert. 

Housing and endplates
The housing and end plates are machined from castings and are made of wear iron, chrome-plated wear iron, or stainless steel. They have round or square flanges, and the shear action inlet reduces stress on the rotary valve housing and rotor.

Rotors
The eight-blade, open end rotor maintains a minimum two-blade labyrinth seal to minimize rotary valve air leakage. Relieved tips reduce rotor drag on materials that tend to build up on housing, and the design reduces pressure points that cause extrusion of materials molded or shaped by pressure. Rotors can be equipped with flat tips for use with cereal products or relieved tips for materials that would normally form skins or thin sheets between the end plates and hub area. Materials of construction include steel and stainless steel.