Pneumatic Conveying Rotary Valves & Airlocks TYPE-4 AIRLOCK: STAINLESS STEEL ROTARY VALVE


The Stainless Steel Rotary Valve Type-4 Airlock is our complete stainless steel rotary valve with the rotor made out of 304 stainless steel with the housing and endplates made from cast 316 stainless steel. It is available in our two most popular airlock sizes (8” and 10” valves) and is made from the same robust design as our cast iron valves and available with all the same options including the two most popular being relieved tips (cuts down on the surface area of the tips for sticky or shearable materials) and shaft air purge (a kit that puts a compressed air purge right at the seals in endplates). Since this valve is used in food applications, we also offer the option of having the rotor welds ground smooth and flush.

All of our rotary valves are NFPA Section compliant.


  • Our most popular stainless steel cast iron rotary valve
  • Construction: 316 stainless steel housing and endplates with 304 stainless steel open end rotor
  • Available in two sizes: 8” (FT9) airlock (0.27 CFR) or 10” (FT12) airlock (0.75 CFR)
  • *See Nedox® Type-3 for additional size valves that meet food grade requirements
  • Can be used as either a feeder or an airlock on any non-abrasive material
  • 100% manufactured and assembled in the USA

Some of the applications that fit the Type-4 rotary valve:

  • Food applications requiring 304SS product contact
  • Areas that have caustic wash down requirements
  • Sea water environments