... 19mm BK series stainless steel centrifugal pumps with semi-open impeller, max. solid 19mm, produced by advanced stamping and welding ... technology, the pump body, impeller and shaft are made of SUS304 or SUS316, with features ... impurities.Motor: 2-pole induction motor, aluminum alloy motor case, single phase with thermal protector, Class F or B, Protection IP54 ...