... feature by their structures of multi- Semi-Hermetic Bitzer compressors Screw Compressor Condensing Units1. Product description The Products feature by ... are employed for all products: Bitzer HSN series Semi-Hermetic screw compressors; Protection devices for wrong direction, over heating, over ... position, oil leakage, high&low pressure etc; Economizers; 3. Model code B B LG S 3 -- 225 J Temperature J ...