Macnaught DDP25 25mm Air Operated Diaphragm Pump (Max 174LPM)

The Macnaught DDP25 offers an economical fluid transfer option where medium to high flow rates are needed with minimal back-pressure. Designed for durability and versatility, it can safely operate dry for easy priming without damage.

A removable air valve allows for in-place repairs, reducing downtime and simplifying maintenance. The sturdy polypropylene/aluminium body ensures broad chemical compatibility, making it suitable for new or used oils, engine coolants (RTU), diesel, or oily water applications. The DDP25 is fully repairable, with spare parts readily available. (Not suitable for flammable liquids.)

FEATURES

• Up to 174 L/min flow rate, measured at pump outlet with water
• Removable air valve for easy repairs without dismantling the pump
• Polypropylene/aluminium body for wide chemical compatibility
• Air-operated design allows speed control for adjustable output
• Removable exhaust muffler for simple replacement or remote fitting to reduce noise
• Cost-effective solution for rapid fluid transfer of low-viscosity fluids
• Self-priming, dry-run safe for short periods without pump damage

SPECIFICATIONS

• Maximum air pressure: 690 kPa (100 psi)
• Inlet / outlet ports: 1" BSP(F)
• Air inlet size/type: 1/2" NPT(F)
• Maximum flow rate: 174 L/min (viscosity dependent)
• Suction lift: 4.9 m (dry), 9.4 m (wet)
• Maximum solids handling: 3.2 mm (0.125")
• Fluid temperature range: -23°C to 88°C
• Maximum noise level: 93 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)

PACKAGE INCLUDES

• Macnaught DDP25 1" air-operated double diaphragm pump
• Air exhaust muffler 1/2" NPT(M)
• Instruction manual