Aluminum Alloy Pneumatic Diaphragm Pump

The XSU aluminum alloy pneumatic diaphragm pump is a compact solution for moving many industrial fluids. It uses compressed air instead of an electric motor. Therefore, it is well suited to wet areas, mobile transfer jobs, and sites where simple speed control is important.

Its aluminum alloy body is lighter than many steel pump bodies. As a result, the pump is easier to carry, install, and maintain. In addition, the double-diaphragm design can handle thin liquids, viscous fluids, and liquids with small suspended particles.

Jiangsu Xiangsu Machinery Equipment Manufacturing Co., Ltd. supplies pneumatic pumps for industrial users, distributors, contractors, and equipment builders. Each pump can be configured according to the fluid, required flow, pressure, temperature, and installation conditions.

How the Pump Works

Compressed air moves two diaphragms from side to side. While one chamber draws in fluid, the other chamber pushes fluid toward the outlet. Check balls control the direction of flow.

This simple process does not require a shaft seal. Therefore, the risk of leakage from a rotating seal is reduced. The flow rate can also be adjusted by changing the air supply. Moreover, the pump can operate at a low speed for controlled transfer or at a higher speed when more flow is needed.

Main Product Benefits

• Lightweight aluminum alloy pump body
• Air-powered operation without an electric drive motor
• Self-priming design for easier startup
• Adjustable flow through air-pressure control
• Suitable for viscous fluids and small suspended solids
• No rotating mechanical seal in the fluid section
• Bolted chambers for firm sealing and easier service
• Threaded inlet and outlet connections
• Compact structure with stable mounting feet
• Several diaphragm, ball, and seat materials available

Typical Technical Parameters

The following values cover common configurations in this product series. Final performance depends on the selected size, diaphragm material, air supply, fluid viscosity, and pipe layout.

These figures are representative series data. Please confirm the required operating point with XSU Pump before ordering.

Suitable Fluids and Industries

The aluminum alloy pneumatic diaphragm pump is commonly used for coatings, ink, oil, resin, adhesive, detergent, wastewater, and general process liquids. It may also transfer some solvents when all wetted materials are compatible.

Typical industries include:

• Paint and coating production
• Printing and packaging
• Machinery and automotive plants
• Oil and lubricant handling
• Ceramic and mining processes
• Wastewater and sludge transfer
• Drum and tank unloading
• Chemical dosing and circulation
• Mobile cleaning and service systems

Aluminum is not suitable for every acid, alkali, or aggressive chemical. For that reason, buyers should provide the fluid name, concentration, and temperature before selection. For corrosive liquids requiring continuous electric pumping, consider an IH chemical centrifugal pump. For abrasive slurry service, an UHB corrosion-resistant mortar pump may be a better option.

Diaphragm and Wetted-Part Selection

Correct material selection helps improve service life and operating safety.

NBR is often selected for oil-based fluids. EPDM may suit many water-based liquids, while FKM offers resistance to various oils and chemicals. PTFE is available for a wider range of aggressive fluids. However, fluid compatibility, temperature, solids, and cycle rate must all be checked together.

XSU Pump can help select the pump body, diaphragm, valve ball, valve seat, and connection type. This matching process is especially important when the liquid contains solvents, abrasive particles, or high-viscosity material.

Manufacturer Support and Custom Options

As an industrial pump manufacturer, XSU Pump supports both standard orders and project-based configurations. Available services may include:

• Pump sizing based on flow and discharge pressure
• Diaphragm and wetted-part material selection
• Thread and connection customization
• OEM branding and product labeling
• Custom packaging for distributors
• Spare diaphragm, ball, and seat kits
• Operating documents and installation guidance
• Order inspection before shipment

For more guidance, read about industrial fluid transfer pumps and industrial pump solutions.

Installation and Operating Guidance

Install the pump on a firm, level base. Keep the suction pipe short and avoid unnecessary bends. In addition, use a clean air supply with a filter, regulator, and suitable shut-off valve.

Before startup, check all fasteners and hose connections. Then increase the air pressure slowly. Do not exceed the rated pressure of the pump or connected equipment. If pulsation affects the process, an air-line regulator or discharge pulsation damper can help create a steadier flow.

Regular inspection of diaphragms, valve balls, and seats will also reduce unplanned downtime.

Information Required for Selection

Please provide the following details when requesting a quotation:

• Fluid name and concentration
• Flow rate and discharge pressure
• Fluid temperature and viscosity
• Particle size and solids content
• Suction height and pipe length
• Available air pressure and air volume
• Required connection size and thread standard
• Preferred diaphragm material
• Quantity and OEM requirements

With this information, XSU Pump can recommend a suitable and practical configuration.

Frequently Asked Questions

Can the pump handle viscous liquid?

Yes. Pneumatic diaphragm pumps can transfer many viscous fluids. However, the available flow will fall as viscosity rises. Pipe size and air supply must also be considered.

Can the pump run without liquid?

The pump can tolerate limited dry running better than many centrifugal pumps. Even so, long dry-running periods should be avoided because they increase wear and air use.

Is the aluminum body suitable for strong acids?

Usually not. Strong acids and alkalis may attack aluminum. A stainless steel, engineering plastic, or fluoroplastic pump may be more suitable after a compatibility review.

How is the flow rate controlled?

Flow can be adjusted through the air regulator or a fluid-side control system. The pump speed changes as the supplied air volume and pressure change.