IMPA: 591603

Aluminum Pneumatic Diaphragm Pump – 2 inch (50 mm) BSPT – IMPA 591603

This high-quality aluminum pneumatic diaphragm pump (IMPA 591603) is designed for demanding marine and industrial fluid transfer applications. With a maximum flow rate of 240 L/min and discharge pressure of 6.9 Bar, it efficiently handles a wide range of liquids including fuels, oils, chemicals, and slurries. The pump features 2-inch BSPT inlet and outlet connections, making it compatible with standard marine piping systems.

Self-priming up to 5 meters, the pump can run dry without damage and handles solids up to 8 mm in diameter. Its air-operated design eliminates electrical hazards, making it safe for use in explosive environments. The pump is constructed with a corrosion-resistant aluminum body, stainless steel shaft, and Buna-N diaphragms, ensuring long service life even with abrasive or corrosive media.

Ideal for shipboard use, this pump is suitable for transferring diesel, lubricants, coolants, and wastewater. Its simple design allows for easy maintenance, and the flow rate can be infinitely adjusted by regulating the air supply. A reliable workhorse for any maritime operation.

Key Features

Self-priming – no priming fluid required, suction lift up to 5 m
Handles solids up to 8 mm diameter – minimal wear even with slurries
Infinitely adjustable flow and pressure via air valve
No rotating parts or shaft seals – zero leakage, safe for hazardous fluids
Explosion-proof – no electrical components, safe for flammable environments
Can be submerged in the pumped medium
Dry-run safe – automatic shut-off protects the pump
Easy installation and maintenance – few wearing parts
Suitable for viscous liquids up to 10,000 cP
No oil lubrication required

Technical Specifications

Parameter	Value
Model	QBK-50L
Maximum Flow Rate	240 L/min
Maximum Discharge Pressure	6.9 Bar
Suction Lift (dry)	5 m
Maximum Solid Diameter	8 mm
Maximum Air Consumption	900 L/min
Air Supply Pressure Range	1–7 Bar
Inlet Connection	2" BSPT (50 mm)
Outlet Connection	2" BSPT (50 mm)
Housing Material	Aluminum Alloy ZL104
Shaft Material	Stainless Steel 1Cr18Ni9Ti
Diaphragm Material	Buna-N (Nitrile Rubber)
Overall Height	665 mm
Weight (approx.)	15 kg

Frequently Asked Questions

What is the maximum flow rate of this pump?

The maximum flow rate is 240 L/min at 6.9 Bar discharge pressure.

Can this pump handle abrasive or solid-laden fluids?

Yes, it can handle solids up to 8 mm in diameter. The pump is designed to minimize wear even when pumping slurries or abrasive media.

Is the pump safe for flammable liquids?

Absolutely. Since it is air-operated with no electrical components, it is inherently explosion-proof and safe for use with flammable or explosive fluids.

What maintenance is required?

The pump has few wearing parts. Regularly inspect diaphragms and check valve balls. Ensure the air supply is filtered to remove moisture. Clean the pump after use if pumping media that may solidify.

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Aluminum Pneumatic Diaphragm Pump – 2 inch (50 mm) BSPT – IMPA 591603

Key Features

Technical Specifications

Frequently Asked Questions

Inquire About This Product

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