PUMP 503/4 800RPM


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Hardi 503 Pump Parts List

General specifications

Compact single diaphragm positive displacement pump.

Low power consumption.


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.

503/4.0 (Ref. no. 821618)

Cylindrical shaft, 25 mm / 0.98".

For combustion and electric engine use.

Supplied with narrow base plate.

Normal operating revolutions, 800 r/min.

Maximum pressure, 15 bar / 220 PSI.

Maximum vacuum, 0.82 bar / 12.0 PSI.

Weight, 9.0 kg / 20 lb.

  • Model: 821618