Air Compressor Pumps | Replacement Compressor Pumps / Bare air compressor pumps / By admin Bare replacement air compressor pumps units 8-80 cfm. Â Bare pump units for HV8, HV12,HW16, H21, HW25, H32, HW32, HW45, HW50, HW65 and HW85 air compressors.