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Diaphragm Compressor

China’s specifications, the most complete model of the diaphragm compressor production base, if the crankshaft connecting rod to allow the piston force to be classified as: 0.5t, 0.7t, 1t, 2t, 4t, 8t piston force of the diaphragm compressor, if the motor power to be classified as: 1.5kW, 3kW, 5.5kW up to 90kW diaphragm compressor, can adapt to different process conditions, a variety of compression media conveying and compression, the highest discharge pressure up to 100MPa.
  • Structure type： Z Type,V Type,D Type, L Type
  • Flow-Rate Range:3~3000Nm3/h
  • Max.Discharge Pressure：14500psi(100MPa)
  • Sound level: 58±2~65±2 dB(A)
  • Max.Piston Force： 250kN
  • Max. drive power： 600hp(450kw)
  • Gas Type： H2、N2、O2、He、Ar、Xe、Ke、HCl、H2S、C2H4、HF、SiF4、SiH4、NF3，etc.
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What is Diaphragm Compressor ？

Diaphragm compressors are classified from reciprocating compressors.
A diaphragm compressor is a specially constructed volumetric compressor that uses a rotating diaphragm to compress air or gas. The rotating diaphragm helps to deliver air or gas within the compression chamber and applies the required pressure to deliver air in the desired area.
The cylinders are highly sealed, no lubrication is required, and the compressed gas medium avoids contact with any lubricant, so diaphragm compressors can compress gases of very high purity, typically up to 99.999% purity. Diaphragm compressor is especially suitable for the compression, transport, bottling of precious and rare gases, in addition to extremely corrosive, toxic, flammable and explosive, radioactive gases, also suitable for the use of diaphragm compressor.

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Why Choose Minnuo Diaphragm Compressor?

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Established in 1987, Min Group has been developing and manufacturing industrial diaphragm gas compressors. They are the preferred equipment for high purity, hermetic gas lift compression for hydrogen fuel stations, chemicals, oil, and gas, etc. We have developed H, D, L, V, and Z models and more than 30 product series for intelligent diaphragm gas compression systems.
We can design and manufacture full instrumentation oil-free reciprocating diaphragm gas compression systems according to customer requirements.
Sizes range from 3 hp (2 kW) – 250 hp (186 kW). Output pressures range from 50 psi- 45,000 psi (3,100 bar).

1. High Compression Ratio

Large compression ratio, large compression chamber area, ***type compression ratio up to 10:1.

2. Quiet and low maintenance

Less than 85dBA @ 1m without sound enclosure
Easy to maintain and operate, with no oil distribution plate structure, and advanced oil pressure valve

3.High Discharge Pressure

Minnuo diaphragm gas compressor discharge pressures up to 43,511 psi (3,000 bar)

4.Triple Diaphragms Ensure Complete Isolation of Gas and Hydraulic Oil

Three layers of diaphragms completely isolate the gas and hydraulic oil, high purity of the compressed medium, the medium is sealed at rest, completely isolated, completely isolated from sealing particles into the airflow

5. Provide Test Report

Material testing of parts: mechanical property inspection and chemical composition analysis
Kerosene leak test for body
Water pressure test: water pressure test pressure is 1.5 times of the working pressure, and last for more than 30 minutes
Operation test: no-load mechanical operation test and full-load mechanical operation test

6. Quality Control

Conforms to the requirements of the EU Machinery Directive 2006/42/EC. Application standards. din en 1012 part 1, din en 12100 part 1, din en 60204 part 1, etc.
Explosion-proof according to EU Directive 2014/34/EU, if necessary

7. Extended service life

Wear parts life guarantee
Diaphragm: 4000 h    Valve: 4000 h
Life of main parts
Piston rod: 100000h Cylinder head
cylinder block: 120000h Crankshaft: 120000
Connecting rod: 120,000h
Crankcase: 120,000h
Piston ring: 30,000h
Crosshead: 32000h Connecting rod bolt: 16000h
Unit sets test life：20 years

8. Safety Interlock

  • High-pressure protection: when the gas pressure reaches the specified pressure, the diaphragm compressor automatically stops, to play a protective role.
  • Low pressure starts: when the gas pressure is lower than the set pressure, the diaphragm compressor starts to pressurize.
  • Oil pressure protection: equipment lubrication system oil pressure can not be lower than a certain value, when lower than the set value, the equipment alarm, and shutdown.
  • low water pressure protection: when the water pressure is lower than the set value, the equipment alarm, and shutdown, etc.
    PLC control of the equipment

9. Primary and secondary diaphragm rupture alarm

When the diaphragm on the oil or gas side is ruptured, the oil or gas passes through the guide groove of the middle diaphragm and transmits the pressure to the pressure switch, which generates an alarm because the pressure controlled by the pressure switch is much lower than the working oil or air pressure. Replace the ruptured diaphragm in time to avoid accidents.

Technology Features:

  • The diaphragm compressor body adopts an integral body to reduce the sealing surface and improve processing and assembly accuracy.
  • The charge pump adopts the built-in structure of the crankcase to provide stable hydraulic oil input to the cylinder while avoiding oil leakage.
  • The piston rod and crosshead adopt a floating connection with an automatic centering function.
  • The piston seal adopts German imported hydraulic seal to improve the stability of oil circuit system operation.
  • High-pressure cylinder adopts the oil distribution structure without oil distribution plate sieve, which distributes hydraulic oil more evenly in the cylinder (non-ring groove oil distribution structure), and reduces the difficulty of assembly process and sealing surface.
  • The diaphragm is designed without any openings, which improves the interchangeability and convenience of diaphragm installation and reduces the stress concentration caused by diaphragm openings.
  • The diaphragm leakage alarm can alarm when the diaphragm ruptures or compressed media leaks, improving the reliability of the machine. Leak alarm is equipped with a venting valve for easy operation and maintenance.
  • The regulator/following valve is equipped with an outlet flow sight glass, which makes it easy to observe the operation status of the compressor cylinder oil circuit system.

Select Your Model

G1 Small diaphragm compressor

  • Structure: Z, L, P, D-type
  • Lubrication: splash
  • Oil type:compulsory oil supplement
  • Cooling way:water cooled or air cooled
  • Maintenance maximum weight per piece: 80kg
  • Maintenance maximum space: the circle shall be not less than 1 m
Product Model Volumetric Flow Intake Pressure Exhaust Pressure Water Consumption Crankshaft Speed Motor Power Dimension Unit Weight
(Nm³/h) (MPa(G)) (MPa(G)) (L/H) (r/min) (KW) (L×W×H)（MM） (KG)
GZ1-0.01/15-150 0.01 1.5 15 100 225-450 1.1 1200*780*900 400
GZ1-5/13 5 ATM 1.3 200 450 1.5 1100*600*950 400
GZ1-5/13-200 5 1.3 20 200 450 1.5 1100*600*950 400
GP1-50/90-95 50 9 9.5 400 500 3 1200*780*900 400
GP1-6/10 6 ATM 1 600 600 4 1200*780*900 400
GZ1-70/30-35 70 3 3.5 200 400 4 1350×600×950 450
GD1-150/90-95 150 9 9.5 400 600 3 1350×600×950 550
GD1-8.6/0.5-40 8.6 0.05 4 300 600 4 1350×600×950 550
GL1-15/10-220 15 1 22 500 500 3.5 1350*600*950 560
Gl1-20/20-200 20 2 20 500 600 5.5 1350*600*950 560

G2 Medium-sized diaphragm compressor

  • Structure: Z, L, P, D-type
  • Lubrication: splash
  • Oil type:compulsory oil supplement
  • Cooling way:water cooled or air cooled
  • Maintenance maximum weight per piece: 100kg
  • Maintenance maximum space: the circle shall be not less than 1 m
Product Model Volumetric flow Intake pressure Exhaust pressure Water consumption Crankshaft speed Motor power Dimension Unit weight
Nm3/h MPa(G) MPa(G) L/H r/min KW L×W×H(MM) KG
GZ2-10/10-150 10 1 15 400 420 4 1400*850*1150 800
GZ2-15/13 15 ATM 1.3 400 400 4 1400*850*1150 800
GZ2-15/13-200 15 1.3 20 400 400 7.5 1400*850*1150 800
GP2-50/4-10 50 0.4 1 400 430 5.5 1400*850*1150 800
GZ2-12/160-1000 12 16 100 500 400 5.5 1400*850*1150 800
GZ2-120/8-16 120 0.8 1.6 600 400 4 1100*600*950 450
GZ2-100/15-80 100 1.5 8 900 430 11 1400*850*1150 900
GL2-20/200 20 ATM 20 700 400 7.5 1700*850*1150 1100
GL2-30/4-350 30 0.4 35 1000 420 11 1700*850*1150 900
GD2-60/30-400 60 3 40 1000 400 11 1700*850*1150 850

G3 Medium-sized diaphragm compressor

  • Structure: Z, L,V, P, D-type
  • Lubrication: splash
  • Oil type:compulsory oil supplement
  • Cooling way:water cooled or air cooled
  • Maintenance maximum weight per piece: 800kg
  • Maintenance maximum space: the circle shall be not less than 1.5 m
Product Model Volumetric flow Intake pressure Exhaust pressure Water consumption Crankshaft speed Motor power Dimension Unit weight
Nm³/h MPa(G) MPa(G) L/H r/min KW L×W×H（MM） KG
GL3-60/200 600 8.3 8.5 600 300 7.5 2400*2400*2000 3400
GZ3-50/10-150 50 1 15 1000 400 11 2400*1400*2000 3500
GZ3-40/30-400 40 3 40 1000 400 11 2400*2400*2000 3400
GP3-50/3 50 ATM 0.3 1000 450 11 2400*2400*2000 3400
GP3-340/4-10 340 0.4 1 1500 450 18.5 2800*1400*2000 3600
GL3-50/5-160 50 0.5 16 2000 400 30 2800*1600*2000 4200
GL3-80/7-320 80 0.7 32 2500 400 30 2800×1600×2000 4000
GL3-80/4-350 80 0.4 35 2800 400 30 2800*1600*2000 4200
GD3-100/9.5-200 100 0.95 20 2800 420 30 2800*1600*2000 4200
GD3-200/9-120 200 0.9 12 4000 420 45 2800*1600*2000 5500

G4 Medium-sized diaphragm compressor (compact structure)

  • Structure: D-type (two, three, four cylinelers)
  • Lubrication: splash
  • Oil type:compulsory oil supplement
  • Cooling way:water cooled
  • Maintenance maximum weight per piece: 1000kg
  • Maintenance maximum space: the circle shall be not less than 1.5 m
Product Model Volumetric flow Intake pressure Exhaust pressure Water consumption Crankshaft speed Motor power Dimension Unit weight
Nm³/h MPa(G) MPa(G) L/H r/min KW L×W×H（MM） KG
GP4-1175/48-62 1175 4.8 6.2 2500 420 30 3800*2600*1800 8000
GD4-170/0.3-8 170 0.03 0.8 3000 420 37 4000*2850*2000 10800
GD4-90/200 90 ATM 20 3200 430 45 4000*2850*2000 10800
GD4-105/0.1-29 105 0.01 2.9 4000 420 45 3800*2600*2100 10000
GD4-200/0.1-6 200 0.01 0.6 4000 420 45 4200*2600*2100 14000
GD4-150/1.5-150 150 0.15 15 4000 430 55 3800*2600*1800 9000
GD4-200/15-350 200 1.5 35 4600 360 55 3800*2600*1800 9000
GD4-225/9-200 225 0.9 20 5000 420 55 3800*2600*1800 9500
GD4-800/12-40 800 1.2 4 5400 400 75 3800*2600*1800 9200
GD4-570/28-220 570 2.8 22 7500 360 90 4200*2600*2100 14000

G5 Super-large diaphragm compressor

  • Structure: D-type (two, three, four cylinelers)
  • Lubrication: splash
  • Oil type:compulsory oil supplement
  • Cooling way:water cooled
  • Maintenance maximum weight per piece: 1500kg
  • Maintenance maximum space: the circle shall be not less than 1.5 m
Product Model Volumetric flow Intake pressure Exhaust pressure Water consumption Crankshaft speed Motor power Dimension Unit weight
Nm³/h MPa(G) MPa(G) L/H r/min KW L×W×H(MM) KG
GD5-500/6-210 500 0.6 21 10000 420 110 4300*3200*2200 14000
GD5-750/6-210 750 0.6 21 12000 420 160 4300*3200*2200 16000
GD5-750/15-210 750 1.5 21 10000 420 110 4300*3200*2200 14000
GD5-1000/15-210 1000 1.5 21 12000 4200 160 4300*3200*2200 16000
GD5-1250/15-210 1250 1.5 21 15000 450 160 4300*3200*2200 15000
GD5-1000/20-210 1000 2 21 12000 420 160 4300*3200*2200 16000
GD5-750/20-210 750 2 21 11000 420 132 4300*3200*2200 15000
GD5-1250/20-210 1250 2 21 15000 420 160 4300*3200*2200 16000
G1 Small diaphragm compressor
  • Structure: Z, L, P, D-type
  • Lubrication:splash
  • Oil type:compulsory oil supplement
  • Cooling way:water cooled or air cooled
  • Maintenance maximum weight per piece:80kg
  • Maintenance maximum space:the circle shall be not less than 1 m
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Product Model Volumetric Flow Intake Pressure Exhaust Pressure Water Consumption Crankshaft Speed Motor Power Dimension Unit Weight
(Nm³/h) (MPa(G)) (MPa(G)) (L/H) (r/min) (KW) (L×W×H)（MM） (KG)
GZ1-0.01/15-150 0.01 1.5 15 100 225-450 1.1 1200*780*900 400
GZ1-5/13 5 ATM 1.3 200 450 1.5 1100*600*950 400
GZ1-5/13-200 5 1.3 20 200 450 1.5 1100*600*950 400
GP1-50/90-95 50 9 9.5 400 500 3 1200*780*900 400
GP1-6/10 6 ATM 1 600 600 4 1200*780*900 400
GZ1-70/30-35 70 3 3.5 200 400 4 1350×600×950 450
GD1-150/90-95 150 9 9.5 400 600 3 1350×600×950 550
GD1-8.6/0.5-40 8.6 0.05 4 300 600 4 1350×600×950 550
GL1-15/10-220 15 1 22 500 500 3.5 1350*600*950 560
Gl1-20/20-200 20 2 20 500 600 5.5 1350*600*950 560
G2 Medium-sized diaphragm compressor
  • Structure: Z, L, P, D-type
  • Lubrication:Forced lubrication
  • Oil type:compulsory oil supplement
  • Cooling way:water cooled or air cooled
  • Maintenance maximum weight per piece:100kg
  • Maintenance maximum space:No less than 1 meter around 
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Product Model Volumetric flow Intake pressure Exhaust pressure Water consumption Crankshaft speed Motor power Dimension Unit weight
Nm3/h MPa(G) MPa(G) L/H r/min KW L×W×H(MM) KG
GZ2-10/10-150 10 1 15 400 420 4 1400*850*1150 800
GZ2-15/13 15 ATM 1.3 400 400 4 1400*850*1150 800
GZ2-15/13-200 15 1.3 20 400 400 7.5 1400*850*1150 800
GP2-50/4-10 50 0.4 1 400 430 5.5 1400*850*1150 800
GZ2-12/160-1000 12 16 100 500 400 5.5 1400*850*1150 800
GZ2-120/8-16 120 0.8 1.6 600 400 4 1100*600*950 450
GZ2-100/15-80 100 1.5 8 900 430 11 1400*850*1150 900
GL2-20/200 20 ATM 20 700 400 7.5 1700*850*1150 1100
GL2-30/4-350 30 0.4 35 1000 420 11 1700*850*1150 900
GD2-60/30-400 60 3 40 1000 400 11 1700*850*1150 850
G3 Medium-sized diaphragm compressor
  • Structure: Z、L、V、P、D Type
  • Lubrication:Forced lubrication
  • Oil type:Oil replenishment
  • Cooling way:water cooled or air cooled
  • Maintenance maximum weight per piece: 60-70 KG
  • Maintenance maximum space:No less than 1 meter around 
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Product Model Volumetric flow Intake pressure Exhaust pressure Water consumption Crankshaft speed Motor power Dimension Unit weight
Nm³/h MPa(G) MPa(G) L/H r/min KW L×W×H（MM） KG
GL3-60/200 600 8.3 8.5 600 300 7.5 2400*2400*2000 3400
GZ3-50/10-150 50 1 15 1000 400 11 2400*1400*2000 3500
GZ3-40/30-400 40 3 40 1000 400 11 2400*2400*2000 3400
GP3-50/3 50 ATM 0.3 1000 450 11 2400*2400*2000 3400
GP3-340/4-10 340 0.4 1 1500 450 18.5 2800*1400*2000 3600
GL3-50/5-160 50 0.5 16 2000 400 30 2800*1600*2000 4200
GL3-80/7-320 80 0.7 32 2500 400 30 2800×1600×2000 4000
GL3-80/4-350 80 0.4 35 2800 400 30 2800*1600*2000 4200
GD3-100/9.5-200 100 0.95 20 2800 420 30 2800*1600*2000 4200
GD3-200/9-120 200 0.9 12 4000 420 45 2800*1600*2000 5500
G4 Medium-sized diaphragm compressor (compact structure)
  • Structure: D Type (Two cylinders, Three cylinders,Four cylinders）
  • Lubrication:Forced lubrication
  • Oil type:Forced Oil Replenishment
  • Cooling way:Water cooling
  • Maintenance maximum weight per piece:1000 KG
  • Maintenance maximum space:No less than 1.5 meters around
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Product Model Volumetric flow Intake pressure Exhaust pressure Water consumption Crankshaft speed Motor power Dimension Unit weight
Nm³/h MPa(G) MPa(G) L/H r/min KW L×W×H（MM） KG
GP4-1175/48-62 1175 4.8 6.2 2500 420 30 3800*2600*1800 8000
GD4-170/0.3-8 170 0.03 0.8 3000 420 37 4000*2850*2000 10800
GD4-90/200 90 ATM 20 3200 430 45 4000*2850*2000 10800
GD4-105/0.1-29 105 0.01 2.9 4000 420 45 3800*2600*2100 10000
GD4-200/0.1-6 200 0.01 0.6 4000 420 45 4200*2600*2100 14000
GD4-150/1.5-150 150 0.15 15 4000 430 55 3800*2600*1800 9000
GD4-200/15-350 200 1.5 35 4600 360 55 3800*2600*1800 9000
GD4-225/9-200 225 0.9 20 5000 420 55 3800*2600*1800 9500
GD4-800/12-40 800 1.2 4 5400 400 75 3800*2600*1800 9200
GD4-570/28-220 570 2.8 22 7500 360 90 4200*2600*2100 14000
G5 Super-large diaphragm compressor
  • Structure: D Type  (Two cylinders, Three cylinders, Four Cylinders or Six Cylinders )
  • Lubrication:Forced Lubrication
  • Oil type:Forced oil replenishment
  • Cooling way:Water cooling
  • Maintenance maximum weight per piece:5000 KG
  • Maintenance maximum space:No less than 2.5 meters around
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Product Model Volumetric flow Intake pressure Exhaust pressure Water consumption Crankshaft speed Motor power Dimension Unit weight
Nm³/h MPa(G) MPa(G) L/H r/min KW L×W×H(MM) KG
GD5-500/6-210 500 0.6 21 10000 420 110 4300*3200*2200 14000
GD5-750/6-210 750 0.6 21 12000 420 160 4300*3200*2200 16000
GD5-750/15-210 750 1.5 21 10000 420 110 4300*3200*2200 14000
GD5-1000/15-210 1000 1.5 21 12000 4200 160 4300*3200*2200 16000
GD5-1250/15-210 1250 1.5 21 15000 450 160 4300*3200*2200 15000
GD5-1000/20-210 1000 2 21 12000 420 160 4300*3200*2200 16000
GD5-750/20-210 750 2 21 11000 420 132 4300*3200*2200 15000
GD5-1250/20-210 1250 2 21 15000 420 160 4300*3200*2200 16000

Case Project

The Kennedy Space Center in the United States has deployed a 100MPa reciprocating nitrogen compressor for leak testing of rocket fuel systems prior to launch.

In Japan, the Tokyo Electronics Industrial Cluster has installed an 1800 cubic meter per hour reciprocating argon compressor to supply gas for semiconductor chip manufacturing.

In Germany, a chemical company in the Ruhr area has completed a 2500 cubic meter per hour diaphragm ethylene compressor project for chemical raw material conversion and storage.

In Dubai, UAE, a 30MPa diaphragm carbon dioxide compressor has been deployed at a clean energy park to support carbon capture and storage for solar power generation projects.

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