... particle could reach 19mm BK series stainless steel centrifugal pumps with semi-open impeller, max. solid 19mm, produced by advanced ... , impeller and shaft are made of SUS304 or SUS316, with features of exchangeable components, stable quality, small size, light ... motor case, single phase with thermal protector, Class F or B, Protection IP54, Continuous duty.Operation Condition:Liquid Temperature: -15°C ...