Walinga has been manufacturing rotary vane airlocks since the early 80's. We pride ourself in quality heavy duty blow through and drop through style airlocks. Whether you're looking for a rotary vane airlock to complete your milling operation or to repair a grain vac, Walinga is sure to have the right one to suit your needs. We offer "Drop Thru" styles and "Blow Thru" styles. We also offer different types of rotors. From solid to stainless steel tips to rubber bladed tips. Walinga also offers round or square mounting surfaces. We also specialize in custom rotary vane airlocks.