Air Operated Diaphragm Pump

An air-operated diaphragm pump is a high-performance pump that uses compressed air as its power source to achieve fluid transfer through the reciprocating motion of a diaphragm. This pump combines high precision, corrosion resistance, low energy consumption, and maintenance-free operation, making it a commonly used liquid transfer device in industries such as chemical, electronics, electroplating, wastewater treatment, and new energy. Thanks to its advanced structural design and high-quality materials, our air-operated diaphragm pump achieves efficient, stable, and precise fluid transfer even under complex operating conditions.

Main Structure and Working Principle

This pump utilizes compressed air to drive two diaphragms to alternately draw in and discharge the medium, eliminating the need for motor drive or mechanical seals, thus avoiding the leakage, wear, and overheating problems of traditional pumps. The fully isolated fluid channel design ensures complete separation of the drive end from the medium, guaranteeing safety and reliability. The air-operated diaphragm pump features a modular structure for easy maintenance, and users can freely replace the materials of the wetted parts (such as PTFE, PVDF, PP, or 316L stainless steel) according to process requirements.

Performance parameters are as follows:

High Precision and Stable Flow Rate
Advanced air path control technology and optimized diaphragm motion curves ensure stable flow, minimal pulsation, and repeatability exceeding ±1% even at high frequencies.

Superior Corrosion and Wear Resistance
The entire pump is constructed from chemically resistant materials, allowing for long-term use in conveying highly corrosive media such as acids, alkalis, solvents, and oxidants.

Motor-Free and Explosion-Proof
Powered by compressed air, eliminating the risk of electrical sparks, it can operate safely in explosion-proof areas and high-risk conditions.

Strong Self-Priming Capability and No-Load Operation
It can start without priming and can run dry for short periods without damaging the diaphragm, making it particularly suitable for frequent start-stop or liquid interruption applications.

Low Noise and Low Vibration Design
Optimized internal flow channels and buffer device design ensure smooth and quiet operation, reducing energy consumption and equipment fatigue.

Easy Maintenance and Long Lifespan
Utilizing imported reinforced diaphragm materials and a high-strength valve seat structure, it exhibits excellent fatigue resistance, a long service life, and is virtually maintenance-free.

1. Chemical Industry

Diaphragm pumps are widely used for the metering and transfer of various acids, alkalis, solvents, emulsions, and corrosive chemicals.Due to the use of corrosion-resistant materials such as PTFE, PVDF, PP, and 316L stainless steel, the pump body can operate stably in strong acid, strong alkali, and organic solvent environments.For example, they are used for the precise dosing and circulation of chemicals such as sulfuric acid, hydrochloric acid, sodium hypochlorite, and methanol.

2. Water & Wastewater Treatment

Diaphragm pumps can be used in the dosing and neutralization processes of municipal wastewater treatment plants, waterworks, or industrial wastewater systems.They are commonly used for conveying flocculants (PAC, PAM), disinfectants (NaClO), dechlorinating agents, and acid-base adjusters.With their high precision, corrosion resistance, and maintenance-free characteristics, they can ensure long-term stable automated dosing systems.

3. Electronics & Electroplating Industry

In electroplating, semiconductor, and circuit board production, diaphragm pumps are used to transport highly corrosive chemical media such as electroplating solutions, etching solutions, and cleaning solutions.Their leak-free structure and metal-free design ensure the purity of the chemical solution and prevent product contamination.They also offer advantages such as explosion-proof design, safety, and precise flow control, making them suitable for automated dosing and waste liquid recovery systems in electronics factories.

4. Paper Making & Textile Printing and Dyeing Industry

In paper making and printing and dyeing processes, diaphragm pumps are mainly used for the transport and metering of high-viscosity liquids such as dyes, auxiliaries, and slurries.Their strong self-priming capability, ability to withstand dry operation, and capacity to handle liquids containing microparticles make them excellent for high-load industrial production.They also allow for precise control of pigment concentration, ensuring color consistency and process stability.

5. New Energy & Photovoltaic Industry

In battery manufacturing and photovoltaic cell production, diaphragm pumps are used for the precise delivery of electrolytes, acidic solutions, and chemical solutions.Their high purity, pollution-free operation, and stable flow rate meet the standards for high-end electronic chemicals.They are particularly suitable for high-precision dosing processes in lithium battery manufacturing, electrolyte production, etching solutions, and developing solutions.

Q1: What is an Air Operated Diaphragm Pump?

A: An Air Operated Diaphragm Pump is a positive displacement pump that uses compressed air as power and achieves fluid intake and discharge through the reciprocating motion of a diaphragm. It requires no motor drive, has no rotating parts, and is particularly suitable for conveying corrosive, viscous, or liquids containing solid particles. With its simple structure, explosion-proof safety, and maintenance-free operation, it is widely used in industries such as chemical engineering, electroplating, and water treatment.

Q2: What are the main advantages of an Air Operated Diaphragm Pump?

A: Our Air Operated Diaphragm Pump has the following significant advantages:

High precision, stable flow rate, and low pulsation;

Advanced structure, no need to adjust motor rotation;

Corrosion-resistant, wear-resistant, and long service life;

Can operate under no-load conditions, not afraid of dry running;

Leak-free design, safe and explosion-proof;

Modular structure, convenient installation and maintenance.

Q3: What media can an Air Operated Diaphragm Pump convey?

A: It can transport almost all types of fluids, including:

Corrosive chemical liquids such as acids, alkalis, and solvents;

High-viscosity fluids, such as inks, paints, resins, and slurries;

Sewage and slurry containing microparticles or suspended solids;

Pure or high-requirement liquids, such as electronic chemicals and pharmaceutical solutions.

The pump body can be made of PTFE, PVDF, PP, 316L stainless steel, etc., to meet the compatibility requirements of different media.

Q4: What are the differences between an air-operated diaphragm pump and an electric pump?

A: The main differences are as follows:

Different power sources: Air-operated pumps use compressed air, while electric pumps are driven by a motor;

Higher safety: Air-operated pumps produce no electrical sparks and are suitable for explosion-proof areas;

Strong self-priming performance: Can start without priming;

Simpler maintenance: No mechanical seals or lubrication systems;

Wideer adaptability: Can transport high-viscosity liquids, liquids containing solids, or corrosive liquids.

Q5: Can an air-operated diaphragm pump operate continuously?

A: Yes.Our products utilize an optimized airflow system and fatigue-resistant diaphragm materials, enabling long-term continuous operation while maintaining stable flow and low energy consumption.Even under intermittent start-stop conditions, they will not damage the pump body.