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How Does a Diaphragm Compressor Work

Discover the Structure, Benefits, and Our Proven GZ-500/16-29 Model

In the hydrogen energy industry, where gas purity, leak-free performance, and explosion-proof safety are paramount, diaphragm compressors have emerged as the most trusted technology for high-pressure gas handling.

But how exactly does a diaphragm compressor work? What makes it better than other types of compressors for hydrogen applications?

Let’s break it down—with real data from our GZ-500/16-29 model, already used in global hydrogen projects.


⚙️ How Does a Diaphragm Compressor Work?

A diaphragm compressor compresses gas using flexible metal diaphragms rather than pistons. The diaphragm is hydraulically actuated—moved back and forth by a plunger that is powered by a crankshaft and motor. Gas is compressed in a completely sealed chamber, never coming into contact with oil or lubricants.

This makes it the ideal choice for ultra-pure, flammable, or toxic gases, such as hydrogen.

🔩 Main Components of a Diaphragm Compressor

  • Gas-end chamber: The area where hydrogen is compressed—100% leak-tight and oil-free.

  • Metal diaphragm (usually stainless steel): Provides flexible movement to compress the gas.

  • Hydraulic oil system: Drives the diaphragm with consistent force.

  • Crankshaft and motor drive system: Converts electric motor energy into reciprocating motion.

  • Cooling system: Often water-cooled to maintain stable temperature under high pressure.

  • Safety valves and sensors: Prevent overpressure and ensure system integrity.

All components are housed in a compact, explosion-proof frame, with customizable features depending on application needs.


💡 What Pain Points Do Hydrogen Engineers Face?

ChallengeOur Diaphragm Compressor Solution
Gas purity risk from oil-lubricated compressorsFully oil-free diaphragm chamber
Leakage or safety hazards100% sealed, leak-proof gas end
Complex setup and scattered systemsAll-in-one integrated skid design
High power usage and overheatingWater-cooled system + 18.5KW efficient shaft power
Explosion safety requirements22KW ATEX-compliant EX motor

🚛 GZ-500/16-29: Real-World Example for Hydrogen Systems

This Keepwin diaphragm compressor is trusted by clients worldwide for electrolyzer hydrogen boosting:

  • Flow Rate: 500 Nm³/h

  • Inlet Pressure: 1.6 MPa

  • Discharge Pressure: 2.9 MPa

  • Motor: 22KW EX (Explosion-Proof)

  • Shaft Power: 18.5KW

  • Cooling: Water-cooled

  • Compression Structure: Z-type, single-acting diaphragm

  • Application: Downstream of hydrogen production lines, pipeline injection, storage tank filling, and mobile fueling modules


Why Choose Keepwin for Hydrogen Compression?

  • 20+ years of manufacturing experience

  • CE/ATEX compliant for international markets

  • Precision-built for zero contamination and zero leakage

  • Full technical support and long-term service

  • Proven in Middle East, Europe, Asia-Pacific hydrogen projects


🔍 Still Using Piston or Screw Compressors for Hydrogen? Here’s Why You Should Upgrade

If your application demands gas purity, safety, and stable high-pressure performance, diaphragm compressors are the industry standard—and Keepwin delivers cost-effective, globally proven solutions.


📎 Download Our GZ-500/16-29 Datasheet Now

[📥 Click to Download PDF]
[📞 Request a Custom Quote]
[🌐 www.keep-win.com]

Picture of John Hannah

John Hannah

Thank you for this insightful and well-articulated piece. Your perspective is a significant contribution to the conversation, and we've taken away several key action points. We appreciate you sharing your knowledge and look forward to your future posts.

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