Rotary Airlock Feeder – Heavy Duty Extra Tough (HDX)

If you are in an industry that requires high temperature and pressure, the HDX Heavy-Duty Extra-Tough Drop-Thru rotary airlock valves for dust collectors are designed to withstand high temperatures and pressure differentials up to 22 psi. This legendary high-pressure gate valve design sets the standard by which all others in the industry are measured. 

Why This Heavy-Duty Airlock Valve? 

HDX heavy-duty valves offer the heaviest gauge rotor vane stock of any competing product, extra-thick endplates, flanges, and housing walls, along with outboard mounted oversized bearings that are pre-lubricated and permanently sealed to ensure low maintenance and prolonged life compared to other heavy-duty gate valves.

  • Heaviest gauge rotor vane stock of any dust collector valves
  • Extra thick endplates, flanges, and housing walls
  • Outboard mounted oversized bearings, pre-lubricated and permanently sealed

To minimize costly maintenance and downtime, the Meyer PRO-TEC Seal is an enhanced Inflated Shaft Seal specifically designed for use in very abrasive, positive pressure pneumatic conveying applications.

HDX Heavy-Duty Extra-Tough Drop-Thru Features

The HDX rotary airlock for dust collectors is available with:

  • 6-vane or 8-vane rotor design
  • Square or round flange housing with:
    • Cast iron
    • NFPA-68 & 69 Certified
    • 304/316 stainless steel, or
    • Ni-hard construction

Application Data Sheet – Fill Out and Return for Accurate Quote



  • Pressure Rating: 22 PSI
  • Maximum Operating Temperature: 1,000°F
  • Materials: Dry Free-Flowing Including:
  • Corrosive, Hygroscopic, Abrasive


Pneumatic Conveying, Blending, Dust Collection, Drying, Pollution Control, Weighing, Mixing, Feeding


Asphalt, Cement, Food, Power, Baking, Mining, Chemical, Paint, Plastics, Petrochemical


  • Available in fourteen sizes from 4×4 through 36×36
  • Round or square flange assures system compatibility
  • Larger diameter shafts for less deflection and optimum torque deliver
  • Permanently sealed bearings ensure protection from contamination
  • Special rotor designs including coatings, polishing, shallow pockets, and closed-end to specifically match your application
  • Cast iron or stainless steel housings are standard providing maximum structural stability with optional cast materials available including; Inconel®, Hastelloy®, cast steel or aluminum
  • Housing coating options include hard chrome, nickel, Teflon®, tungsten carbide, chrome carbide, and plasma