IMPA: 591602

Aluminum Pneumatic Diaphragm Pump – 1.5" BSPT (IMPA 591602)

This aluminum pneumatic diaphragm pump, IMPA code 591602, is designed for reliable fluid transfer in marine and industrial applications. With a maximum flow of 140 L/min and discharge pressure up to 6.9 bar, it efficiently handles a wide range of fluids, including viscous, abrasive, and corrosive media. The pump's 1.5-inch BSPT ports ensure compatibility with standard marine piping systems, while its self-priming capability (5 m suction lift) and ability to run dry without damage make it ideal for demanding shipboard tasks.

Constructed with a corrosion-resistant aluminum alloy body and Buna-N diaphragms, this pump is safe for use in explosive environments as it requires no electrical power. It can handle solids up to 4.5 mm in diameter and features adjustable flow and pressure via the air valve. The simple air-operated design minimizes maintenance, with no rotating parts or shaft seals to wear out. Perfect for bilge pumping, sludge transfer, and handling hazardous liquids on vessels.

Key Features

Technical Specifications

SpecificationValue
ModelQBK-40L
IMPA Code591602
Maximum Flow140 L/min (37 gpm)
Discharge Pressure6.9 bar (100 psi)
Suction Lift (dry)5 m (16.4 ft)
Maximum Particle Size4.5 mm (0.18 in)
Air Consumption600 L/min (21 scfm)
Air Pressure Range1–7 bar (14–100 psi)
Inlet/Outlet Connections1½" BSPT female
Overall Height (H)480 mm (18.9 in)
Dimensions (A x B x C)236 x 155 x 370 mm
Housing MaterialAluminum alloy (ZL104)
Diaphragm MaterialBuna-N (Nitrile)
Ball Valve MaterialBuna-N (Nitrile)
Shaft MaterialStainless steel (1Cr18Ni9Ti)
Weight (approx.)12 kg (26.5 lbs)

Frequently Asked Questions

Can this pump handle abrasive or solid-laden fluids?

Yes, the pump can handle solids up to 4.5 mm in diameter. The diaphragm design minimizes wear from abrasives, making it suitable for slurry and sludge transfer.

Is the pump safe for use with flammable liquids?

Absolutely. Since it is pneumatically operated with no electrical components, it is inherently safe for explosive or flammable environments as per ATEX and similar standards.

What maintenance is required?

Minimal. Regularly check air filters and clean the pump after use with setting fluids. Replace diaphragms and valves periodically based on usage and fluid compatibility.

Can the pump run dry without damage?

Yes, the pump can run dry indefinitely without damage. It also features automatic shut-off if overloaded, resuming operation once normal conditions return.

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