Two Stage Electric Compressor for Fuel Cell Electric Vehicles Hydrogen Gas Diaphragm Compressor

Our Two-Stage electric compressor boosts fuel cell stacks to higher pressures and flows, significantly improving efficiency and power density and enabling downsized packaging to fit and drive the electric powertrains of regular-sized vehicles.

  • Model:
  • Flow Rate: 185Nm3/h @ 7bar 15°C
  • Suction Pressure: 3-10bar (G) (Designed at 3barg)
  • Discgarge Pressure: 450bar (G)
  • Compressor Mediums: 99.995% Hydrogen gas
  • Power: 75KW
  • Luricating Type:
  • Cooling type: Water cooling

Our efficient, powerful and lightweight keepwin compressor fuses leading-edge aerospace and automotive technologies to boost next-generation fuel cells and promoting the adoption of zero-emission vehicles.


Our Two-Stage big compressio ratio Electric Hydrogen Gas Diaphragm Compressor for Fuel Cell Electric Vehicles 

Keepwin Gas solution | Reciprocating compressor


Product NameHydrogen Gas Booster Diaphragm Compressor 
ModelGD-185/7-450
Compress medium 99.995% Hydrogen gas  
TypeD type, Two stages, Double action, Two diaphragm compressor, Water Cooled, Oil-free diaphragm compressor
Capacity flow rate185Nm3/h  @ 7bar 15°C
Suction pressure3-10bar (G) (Designed at 3barg)
Discharge pressure450bar (G)
Driven methodDirect driven
Suction temperature+20~+35 °C;
Transmission temperature≤40℃(after water resource cooled)
Speed420r/min
Main part materialCylinder Head:2Cr13, Gas Pipeline/Flange/ Water pipeline/Cooler/ Oil pipeline: 304L; Diaphragm: 00Cr15Ni15;
Crankshaft:42CrMo;  Piston rod: 40Cr;   Cylinder / Piston: 45#; Crankcase: HT200
O-ring:Fluorine rubber;
Cooling methodWater cooling ( note: the customer's local water tower's working pressure should 0.2-0.4Mpa, and inlet temperature <25℃)
Water consumption1.5 t/h
Dimension4300×2500×1800mm(for this dimension not included the control cabinet. The control cabinet was separated installed in save area.)
N.W Weight15000kgs
Install positionIndoor or outdoor with shed
Noise≤85dB(A) (within 1m distance)
Paint color can according to client's requirement to paint
Compressor HS CODE8414.80.49
Explosion proof main motor information
Motor typeY Series, Three Phases, Asynchronism, High efficient, energy save explosion-proof dIICT4 motor
GradedⅡCT4
Motor Power75KW
Motor speed1450r/min
Voltage380V/60Hz/3ph
Protection levelIP 55; Temperature rise Class B;

Providing World-Class Diaphragm Compressors


The leak-tight and contamination-free features ofKeepwin's diaphragm compressor keepwin compressors provide numerous benefits. When toxic or hazardous gases are being processed, these keepwin compressors protect the health of workers and the environment and maintain a safe operating area. Since the process gases are totally isolated and have no contact with hydraulic, lubricating, or cooling fluids, high-purity and expensive gases can be processed without any contamination or losses.


Keepwin Gas solution | Reciprocating compressor

As a displacement compressor with special, diaphragm compressor is characterized by a large compression ratio, good sealing performance, and that the compressed air will not be polluted by lubricant or other solid impurities. Therefore diaphragm compressor is applicable to compress high-purity, rare and precious, flammable and explosive, toxic and hazardous, corrosive, and high-pressure gases.

Keepwin diaphragm compressors consist of four types that are Z, V, L and D  type. The exhaust pressure ranges from 1.3 to 90 Mpa. The products are widely used in the industries of national defense, scientific research, petrochemical, nuclear power, pharmaceutical, food-stuff and gas separation.


KEEPWIN compressors are used in virtually every industry in which high-purity, rare, or hazardous gases are utilized. Some specific uses include:

1. Flammable, oxidizing, toxic, and radioactive gases 2. Gas cylinder filling 3. Gas blending and mixing systems 4. Gas transfer and filling and off-loading of tube trailers 5. Chemical and petrochemical gas processing systems 6. Gases for electronics, semiconductor, and fiber optics manufacturing 7. Pressure boosting and storage of gases from on-site gas generation systems 8. Pressure boosting for gas recycling systems 9. High-pressure gas storage systems 10. Hydrogen gas systems at electric power plants 11. Hydrogenation systems 12. Supercritical fluids and solvent extraction systems 13. Research and Development

Keepwin Gas solution | Reciprocating compressor

Some of the other features and benefits of Keepwin’s diaphragm compressors include:

1. Design pressures to over 900 bar / 13,050 psig 

2. Gas flow rates over 2,000 Nm3/hour 

3. Fast-acting leak detection systems to indicate diaphragm and seal failure 

4. Safe, non-flammable hydraulic fluid used for oxygen and other oxidizing gas applications 

5.Single and multiple stage configurations for high compression ratios

6. Horizontally opposed designs available for high-efficiency operation

7. Process contacting metals are available in a variety of alloys for compatibility with process gases

8. Process contacting seals are available in a variety of elastomers and ductile metals for compatibility with process gases

9. Unique cavity design feature for low or high-pressure operations

Keepwin Gas solution | Reciprocating compressorKeepwin Gas solution | Reciprocating compressor

The advanced horizontally-opposed crankcase designs used in many of KEEPWIN's duplex and 2-stage compressors yield numerous advantages.

1. Energy efficiency 

2. Easy maintenance 

3. Minimal unbalanced forces 

4. All compression loading on rod 

5. Reduced load on crankshaft bearings 

6. No troublesome transition assembly 

7. Duplex units that start up under high inlet pressure without unloading 

8. Low horsepower requirements 

9. Duplex units are capable of compressing different gases simultaneously

Keepwin Gas solution | Reciprocating compressorKeepwin Gas solution | Reciprocating compressor

KEEPWIN TECHNOLOGY HEBEI CO., LTD is a good stable quality supplier in China compressor factory, located in Hebei Province, China.  Our factory has 18years of manufacture experience process compressor, with staffs of nearly 150, a total asset of 100,000,000RMB, building area of 11222m2,  Specializes in the development and designing, manufacturing and installation of Reciprocating compressor & Diaphragm Compressor, Fuel Gas Compressor & Natural Gas Compressor & CNG compressor & LNG & LPG & Methane Compressor, Pure gas of Oxygen & Helium & Argon & Xenon & Nitrogen Gas Compressor, Station Hydrogen Compressor, Hydrogen energy equipment, High pressure Air Compressor, Oil free scroll compressor. Our company makes different but suitable plan for every different customer according to the condition of the flow rate, suction pressure & discharge pressure, gas inlet temperature & outlet temperature, air-cooled or water-cooled. The finished products are sent to Quality Control Department for stringent quality tests and factory operation test on various parameters. Quality is our cultural, Customer's good feedback is our developing base. We view client satisfaction as the witness of our products’ utility and application in all environments. 

Keepwin process gas compressors are widely used in Petrochemicals, Fine Chemicals, Pharmaceutical Chemicals, Energy Chemicals, Machinery Industry, Electronic Industry, Animal Husbandry and Defense Industry, Astronomy, Aerospace, Medical industry, Oil field Industry, Garment , Plastic, Glass, Cement, Water treatment, Agriculture, Food, Construction, Joinery, and other fields.   

We view client satisfaction as the witness of our products’ utility and application in all environments. In line with it, we have developed a general framework for comprehending new developments in the compressor industry. It also specializes in mating remolding and sales service of compressors as well as the corresponding pre-and post-position purifying equipment. 

Keepwin Gas solution | Reciprocating compressor

Keepwin Gas solution | Reciprocating compressor

Keepwin Gas solution | Reciprocating compressor

Keepwin Gas solution | Reciprocating compressor

Keepwin Gas solution | Reciprocating compressor


What's the Characteristics and Advantage of Oil Free Diaphragm Compressor?

 Excellent Performance

The diaphragm compressor is a special structure of volumetric compressor,  with the advantages of cylinder no need any lubrication, very good sealing performance, and compression gas medium never contact any lubricant. Therefore, the diaphragm compressor can compress extremely high purity gas, which can generally reach 99.9999% purity. Diaphragm compressors are particularly suitable for the compression, transportation, and filling bottle of precious rare gases. In addition, diaphragm compressors are also suitable for highly corrosive, toxic, flammable, explosive, and radioactive gases. Diaphragm compressor cylinders have good heat dissipation performance and can use a higher compression ratio, so it can provide a wider pressure range, from very low pressure compressed to 20MPa directly. Diaphragm compressors are widely used in Industrial Gas, Food Industry, Petrochemical industry, Nuclear Power, Aerospace, Military Equipment, Scientific Research, and other fields because of their characteristics of Zero leakage, Zero pollution, and Large compression ratio.

Zero leakage: The compressed gas of the diaphragm compressor is only in contact with the metal diaphragm and the cylinder head in the cylinder. The gas seal can be used for high-pressure static sealing. This structural feature determines the extremely low leakage rate of the diaphragm compressor and is widely used in precious and rare gas, extremely corrosive, toxic and harmful, flammable and explosive gas, with radioactive gas compression and transportation.

Zero pollution: the diaphragm compressor cylinder does not need lubrication, the compressed gas does not contact the piston, and is completely isolated from the lubricating oil with a three-layer metal diaphragm, and the sealing performance is absolutely good. The gas will not produce any pollution during the compression process, which is particularly suitable It is used to compress high purity (99.999% and above) and precious rare gas.

Large compression ratio: diaphragm compressor’s cylinder has good heat dissipation performance, close to isothermal compression at small flow rate, higher compression ratio can be maximum reach 20, (piston compressor’s compression ratio is 6). The compression gas medium can be compressed from normal pressure to 20.0MPa only with two stages, (same conditions pressure the piston compressor requires above four stages). The diaphragm compressor’s structure is greatly simplified, with very low failure rate, but much high reliability, and few of the wearing parts. The diaphragm compressor can be applied to a large intake pressure fluctuates. 




Product NameHydrogen Gas Booster Diaphragm Compressor 
ModelGD-185/7-450
Compress medium 99.995% Hydrogen gas  
TypeD type, Two stage, Double action, Two diaphragm compressor, Water Cooled, Oil-free diaphragm keepwin compressor
Capacity flow rate185Nm3/h  @ 7bar 15°C
Suction pressure3-10bar (G) (Designed at 3barg)
Discharge pressure450bar (G)
Driven methodDirect driven
Suction temperature+20~+35 °C;
Transmission temperature40℃(after water resource cooled
Speed420r/min
Main part materialCylinder Head:2Cr13, Gas Pipeline/Flange/ Water pipeline/Cooler/ Oil pipeline: 304L; Diaphragm: 00Cr15Ni15;
Crankshaft:42CrMo;  Piston rod: 40Cr;   Cylinder / Piston: 45#; Crankcase: HT200
O-ring:Fluorine rubber;
Cooling methodWater cooling ( note: the customer's local water tower's working pressure should 0.2-0.4Mpa, and inlet temperature <25)
Water consumption1.5 t/h
Dimension4300×2500×1800mmfor this dimension not included the control cabinet. The control cabinet was separated installed in save area.)
N.W Weight15000kgs
Install positionIndoor or outdoor with shed
Noise85dB(A) within 1m distance)
Paint color can according to client's requirement to paint
Compressor HS CODE8414.80.49
Explosion proof main motor information
Motor typeY Series, Three Phases, Asynchronism, High efficient, energy save explosion-proof dIICT4 motor
GradedCT4
Motor Power75KW
Motor speed1450r/min
Voltage380V/60Hz/3ph
Protection levelIP 55; Temperature rise Class B;


Keepwin Gas solution | Reciprocating compressorKeepwin Gas solution | Reciprocating compressor

Keepwin Gas solution | Reciprocating compressorKeepwin Gas solution | Reciprocating compressor


Gas cylinder filling Gas transfer Gas filling petrochemical gas processing systems Pressure boosting High-pressure gas storage systems