The Rotary Airlock HS Series meters product out of a hopper while isolating the air pressures on either inlet or outlet of the airlock. A typical applicaton for an airlock is to meter product into a convey line. Our standard rotary airlockfeeder offers 8 different sizes from the HS-77 to the HS-2218 and 6 standard types of construction all of which are equipped with outboard bearings and seals. Type ACast iron housing and end plates with carbon steel, open end, rotor Type BCast iron housing and end plates with carbon steel, open end, rotor, chrome plated housing, end plates and adjustable, hardened tool steel, rotor tips Type CCast iron housing and end plates with 304 stainless steel, open end, rotor and chrome plated housing and end plates Type DCast iron housing and end plates with carbon steel, closed end, rotor, chrome plated housing, end plates and adjustable, hardened tool steel, rotor tips Type FCast 316 stainless housing and end plates with 304 stainless steel, open end, rotor (only available in 910 or 1214)