Pneumatic Diaphragm Pumps Manufacturers

A pneumatic pump is a type of pump that uses compressed air as its power source and transports fluids through pipelines via the reciprocating motion of a diaphragm. It features corrosion resistance, the ability to transport viscous fluids through pipes, safe operation, simple structure, and ease of maintenance. It is suitable for flammable and explosive environments and various special applications, such as in the chemical, petroleum, and water treatment industries.

Working Principle
Power Source: Compressed air drives the diaphragm to reciprocate.
Suction Process: When the diaphragm moves upward, a vacuum is created in the pump chamber, drawing in liquid; simultaneously, the check valve at the bottom opens, and the discharge valve closes.
Discharge Process: When the diaphragm moves downward, the pressure in the pump chamber increases, discharging liquid; simultaneously, the suction valve closes, and the discharge valve opens.

Key Features
High Safety: Powered by compressed air, it produces no electrical sparks and can be used in flammable and explosive environments.
Strong Corrosion Resistance: The pump body does not come into contact with the fluid, allowing for the transport of strong acids, strong alkalis, and various corrosive liquids by replacing the diaphragm and pump body with different materials.
Capable of Transporting Multiple Fluids: Effectively transports special fluids containing particles, high viscosity, high volatility, and shear sensitivity.
Self-protection function: When pipeline blockage causes pressure to rise, the pump will stop due to pressure balance, preventing damage and pipeline rupture.
Simple structure and easy maintenance: Few moving parts, easy to disassemble and repair.
Easy to move and install: Small size and light weight; simply connect to an air compressor to operate.

Thank you for purchasing our pneumatic diaphragm pump series. This product features a rational design and excellent manufacturing, offering advantages such as seal-less operation, explosion-proof design, low shear force, easy maintenance, dry operation capability, lightweight structure, self-priming start, and a variety of material options. It is widely used in environmental protection, chemical, food, pharmaceutical, and paper industries.

If this is your first time using this product series, please carefully read this instruction manual to ensure correct installation and use. You can also find relevant product information and parameters online. We will continuously improve product quality and functionality.

Our company produces eleven specifications of diaphragm pumps. The inlet and outlet sizes are 3/8" (10mm), 1/2" (15mm), 3/4" (20mm), 1" (25mm), 1-1/4" (32mm), 1-1/2" (40mm), 2" (50mm), 2-1/2" (65mm), 3-1/4" (80mm), 4" (100mm), and 5" (125mm). The fluid components are made of aluminum alloy, cast steel, ductile iron, PP polypropylene plastic, stainless steel, and fluoroplastic. The diaphragms are made of different materials, including nitrile, polyether, triplex, Teflon, and super Teflon, to meet the needs of different liquid media.

The most significant difference between our pneumatic diaphragm pumps and other diaphragm pumps lies in the air distribution valve structure. Our pneumatic diaphragm pumps eliminate the traditional "O" ring and cylindrical valve structure. Utilizing a three-phase pilot-operated design, it eliminates valve dead spots and pump stoppage. This provides accurate and reliable reversing signals to avoid stoppage and enables faster reversing, resulting in greater pump flow, improved delivery performance, smaller pulses, and more stable flow.

Pneumatic diaphragm pumps can pump both flowing liquids and some non-flowing media, possessing many advantages of self-priming pumps, submersible pumps, canned motor pumps, and impurity pumps.

1. No priming required; maximum suction lift up to 7m, maximum discharge head up to 70m, outlet pressure ≤ 0.84Mpa;

2.Wide flow path, excellent throughput, allowing passage of particles up to 9.4mm in diameter; minimal wear on the pump when pumping slurry and impurities.

3. Head and flow rate can be adjusted via air source pressure (between 0.1 and 0.8 MPa);

4. Operating environment range: 5-65℃, conveying medium range: -20℃ to 150℃;

5. This pump has no rotating parts and no shaft seal. The diaphragm completely isolates the pumped medium from the pump's moving parts and the working medium, preventing leakage. Therefore, it will not cause environmental pollution or endanger personal safety when pumping toxic, volatile, or corrosive media;

6. No electricity is required, making it safe and reliable for use in flammable and explosive environments.

Model Selection Table

Fluid Contact Parts

Diaphragm Materials

Valve Ball

Valve Seat