A diaphragm compressor is a highly sealed, zero-pollution positive displacement compressor that compresses gas by changing the volume of the gas chamber through the reciprocating deformation of a metal or rubber diaphragm.
It does not rely on lubricating oil; the gas is physically isolated from the driving medium (such as hydraulic oil) throughout the entire process. Therefore, it is particularly suitable for pressurizing and transporting high-purity, toxic, flammable, valuable, or corrosive gases (such as hydrogen, helium, oxygen, chlorine, hydrogen sulfide, etc.).
1. Zero-leakage seal: Metal diaphragm + hydraulic drive achieves true “gas-liquid separation,” ensuring gas purity and operational safety
2. Ultra-high pressure ratio: Single-stage pressure ratio can reach 25, and multi-stage pressure ratio can exceed 100MPa (≈1000 bar), far exceeding piston/screw type;
3. Oil-free and pollution-free: Completely avoids lubricating oil mixing into the gas, meeting the stringent cleanliness requirements of electronics, pharmaceuticals, nuclear energy, aerospace, and other industries;
4. Low flow rate and high precision: Typical exhaust volume ranges from several m³/h to 100 m³/h, suitable for precise gas supply scenarios such as laboratories, hydrogen refueling stations, and special processes.
Main technical parameters of diaphragm compressor
Model
speed
Intake pressure
Discharge pressure
Flow Rate
Overall Dimensions
Weight
Remark
(/min)
(MPa)
(MPa)
Nm°/h
(L×W×H)mm
(T)
KRGD3-920/125-450
420
5～20
45
920
~4300X2500X2600
~8.5
45MPa
KRGP3-460/125-450
420
5～20
45
460
~3500X2500X2600
~7.5
45MPa
KRGL2-200/125-450
430
5～20
45
200
~2540X1600X2600
~3
45MPa
KRGZ2-100/125-450
430
5～20
45
100
~2540X1600X2600
~2.5
45MPa
KRGD3-240/150-900
420
10～20
90
240
~4300X2500X2600
~8.5
90MPa
KRGP3-120/150-900
420
10～20
90
120
~3500X2500X2600
~7.5
90MPa
KRGP3-400/400-900
420
35～45
90
400
~3500X2500X2600
~7.5
90MPa
KRGD3-750/60-210
420
1.5～10
21
750
~4300X2500X2600
~9
Residual Hydrogen Recovery
KRGP3-375/60-210
420
1.5～10
21
375
~3500X2500X2600
~8
Residual Hydrogen Recovery
KRGL2-150/60-210
430
1.5～10
21
150
~2540X1600X2600
~2.8
Residual Hydrogen Recovery
KRGZ2-75/60-210
430
1.5～10
21
75
~2540X1600X2600
~2.5
Residual Hydrogen Recovery
KRGD5-500/6-210
420
0.6
21
500
~4300X3200X2200
~14
Filling
KRGD5-750/6-210
420
0.6
21
750
~4300X3200X2200
~16
Filling
KRGD4-500/15-210
420
1.5
21
500
~4000X3000X2000
~12
Filling
KRGD5-750/15-210
420
1.5
21
750
~4300X3200X2200
~14
Filling
KRGD5-1000/15-210
420
1.5
21
1000
~4300X3200X2200
~16
Filling
KRGD5-1250/15-210
420
1.5
21
1250
~4300X3200X2200
~16
Filling
KRGD4-500/20-210
420
2
21
500
~4000X3000X2000
~12
Filling
KRGD5-750/20-210
420
2
21
750
~4300X3200X2200
~15
Filling
KRGD5-1000/20-210
420
2
21
1000
~4300X3200X2200
~16
Filling
KRGD5-1250/20-210
420
2
21
1250
~4300X3200X2200
~16
Filling
KRGD3-920/125-450
420
5-20
45
920
~4300X2500X2600
~8.5
45MPa
KRGP3-460/125-450
420
5-20
45
460
~3500X2500X2600
~7.5
45MPa
KRGL2-200/125-450
430
5-20
45
200
~2540X1600X2600
~3
45MPa
KRGZ2-100/125-450
430
5-20
45
100
~2540X1600X2600
~2.5
45MPa
KRGD3-240/150-900
420
10-20
90
240
~4300X2500X2600
~8.5
90MPa
KRGP3-120/150-900
420
10-20
90
120
~3500X2500X2600
~7.5
90MPa
KRGP3-400/400-900
420
35-45
90
400
~3500X2500X2600
~7.5
90MPa
FAQ
Working Principle of Diaphragm Compressor ：
A diaphragm compressor uses a flexible metal diaphragm to separate the hydraulic oil chamber from the gas chamber.Driven by crankshaft and connecting rod, hydraulic oil pushes the diaphragm to flex up and down. It changes the gas chamber volume periodically, realizing gas suction, compression and discharge.With totally oil-free & leak-tight structure, it is suitable for high-purity, toxic, flammable and corrosive special gases.
