AIR OPERATED DIAPHRAGM PUMP - 3/4" DDP19 Macnaught

The DDP19 offers an economical fluid transfer option where medium to high flow rates are needed with little back-pressure. The ability to dry-run allows easy priming while operating without any damage to the pump. A removable air valve offers repairs to be made while the pump is still fitted in place for quick simple maintenance. The Polypropylene / Aluminium body allows this pump to be used with a range of compatible chemicals as well as the new or used oils and engine coolants (RTU), diesel or oily water applications.

Technical Specfications


Maximum Air Pressure: 690kPa (100psi)
Inlet / Outlet Ports: 3/4" NPT(F)
Air Inlet Size/Type: 3/8" NPT(F)
Maximum Flow Rate: 45 L/min (viscosity dependant)
Suction Lift: 3.9m (dry) / 6.7m (wet)
Maximum Solids Handling: 1.6mm (0.0625")
Fluid temperature range: -23ºC - 88ºC
Maximum noise level: 84 dB(A)
Fluid Compatibility: Oils (new & used), Engine Coolants RTU (new & used), oily water, Diesel
Wetted Components: Aluminium/Polypropylene (body), Aluminium (valve seats), Buna N (diaphragms), Acetal (check valves)

Features & Benefits

Up to 46 litre / minutes flow rate - Measured with water at the pump outlet
Removable Air Valve - Easy swap-out for repairs without time costly dismantling / disconnecting
Polypropylene / Aluminium body - Wide range of chemical compatibility for broader applications
Air-Operated pumps can be speed controlled - More control over a pump output
Removable exhaust muffler included - Easy replacement or remote fitting to reduce noise output
Fast fluid transfer for low viscosity fluids -Inexpensive way to move large volumes of fluid
Easy self-priming - No damage to pump while running even with little or no fluid flow (for short periods)