Hardi 321 Pump Parts List General specifications Compact two diaphragm positive displacement pump. Supplied with base plate. Self-priming. Can be run dry. Can rotate clockwise or anticlockwise. Single grease point for lubrication. Dry sump to simplify maintenance. No special tools needed for maintenance. Polyurethane diaphragms and seals. Cast iron crankcase and covers. 3/4″ suction port, 3/4″ pressure port. Recommended to use HARDI suction and pressure dampers. 321/7.0 (Ref. no. 821557) Tapered shaft for tractor use with HARDI transmission shaft. Normal operating revolutions, 540 r/min. Maximum pressure, 25 bar / 367 PSI. Maximum vacuum, 0.82 bar / 12.0 PSI. Weight, 23.6 kg / 52 lb.
