Natural Gas Compressor | China Suppliers & Factory for Safe, Reliable & Efficient Solutions
Natural Gas Diaphragm Compressor Advantages
01
Absolutely Oil-Free & Zero Leakage, Ensuring Gas Quality and Safety
The metal diaphragm of the diaphragm compressor completely physically isolates the process gas from the hydraulic oil system, achieving 100% oil-free lubrication in the compression chamber. This ensures that the compressed natural gas is not contaminated by lubricating oil, meeting the extremely high purity requirements for applications such as automotive CNG and electronic-grade feedstock gas. At the same time, its static seal structure fundamentally eliminates the risk of external leakage of the process gas, which is crucial for preventing the accumulation of flammable gas in the plant and eliminating explosion hazards.
02
Compact Structure, Suitable for High-Pressure & Small-Flow Precision Applications
The diaphragm compressor has a high single-stage compression ratio and a compact structure, making it particularly suitable for applications such as natural gas satellite filling stations, experimental research, and specialty gas filling, where natural gas needs to be compressed to relatively high pressures but with relatively small flow rates. Its smooth piston reciprocating motion drives the diaphragm through hydraulic oil, resulting in a gentle gas compression process with minimal pulsation, which is friendly to downstream process equipment.
Key Design Points for Natural Gas Diaphragm Compressors
01
Explosion-Proof Electrical System & Material Compatibility
All electrical equipment, including the drive motor, control cabinet, sensors, and junction boxes, must adopt an explosion-proof type complying with Ex d IIB T4 or higher. Given that natural gas may contain trace corrosive components such as hydrogen sulfide, wetted parts are typically made of corrosion-resistant materials like 316L stainless steel and undergo strict degreasing, cleaning, and passivation treatment to extend equipment life and prevent leakage caused by material corrosion.
02
Multi-Layer Diaphragm Safety Monitoring & Over-Temperature Protection
A three-layer diaphragm structure is adopted, equipped with a diaphragm rupture alarm device. When any outer diaphragm ruptures, the pressure change in the middle layer triggers a sensor alarm and an interlock shutdown, preventing gas and oil from mixing or leaking. Simultaneously, a high-high discharge temperature alarm and shutdown interlock must be set to ensure the discharge temperature remains far below the auto-ignition temperature of natural gas, typically set no higher than 120–135°C.
03
Integrated Safety Skid Design
For applications such as filling stations, the compressor is often designed as an integrated skid-mounted unit. A natural gas concentration sensor must be installed within the skid, interlocked with the emergency ventilation system. The process piping system must include a safety valve (with a relief capacity greater than the compressor's maximum flow rate), an inlet filter/separator, and a nitrogen purge connection for pre-startup purging, ensuring the entire process from start-up to operation to shutdown is safe and controllable.
Certificate
Model Selection
| Model G70Z/G95Z/G110Z/G130Z | Piston Stroke 70mm~130mm | Maximum Piston Force 10KN~30KN |
| Maximum Discharge Pressure 70Mpa | Flow Range 1~500Nm³/h | Motor Power 2.2KW~30KW |
| Crankshaft Speed 420rpm | Cooling Method Water Cooled/Air Cooled | |
| Model G70V/G95V/G130V | Piston Stroke 70mm~130mm | Maximum Piston Force 10KN~30KN |
| Maximum Discharge Pressure 50Mpa | Flow Range 1~200Nm³/h | Motor Power 2.2KW~30KW |
| Crankshaft Speed 420rpm | Cooling Method Water-cooled / Air-cooled | |
| Model G110L/G130L | Piston Stroke 110mm~130mm | Maximum Piston Force 20KN~40KN |
| Maximum Discharge Pressure 100Mpa | Flow Range 10~1000Nm³/h | Motor Power 7.5KW~90KW |
| Crankshaft Speed 420rpm | Cooling Method Water-cooled / Air-cooled | |
| Model G110D/G130D/G150D/G180D/G182D/G210D | Piston Stroke 110mm~210mm | Maximum Piston Force 20KN~160KN |
| Maximum Discharge Pressure 100Mpa | Flow Range 30~2000Nm³/h | Motor Power 22KW~200KW |
| Crankshaft Speed 420rpm | Cooling Method Water-cooled / Air-cooled | |
G
Diaphragm type compressor
Z
Piston stroke 70mm
15
Flow (Nm³/h)
10
Inlet pressure (barg)
30
Outlet pressure (barg)
| No. | Model | Cooling water | Flow | Inlet pressure | Outlet pressure | Dimensions L×W×H | Weight | Motor Power |
|---|---|---|---|---|---|---|---|---|
| (L/h) | (Nm³/h) | (MPa) | (MPa) | (≈mm) | (≈kg) | (kW) | ||
| 1 | GZ-15/10-30 | 500 | 15 | 1 | 3 | 1200×800×1100 | 800 | 5.5 |
| 2 | GZ-25/9-31 | 500 | 25 | 0.9 | 3.1 | 1200×800×1100 | 800 | 7.5 |
| 3 | GZ-100/2-7 | 1000 | 100 | 0.2 | 0.7 | 2600×1800×1700 | 2600 | 15 |
| 4 | GV-8/7-235 | 1000 | 8 | 0.7 | 23.5 | 1400×900×1100 | 1000 | 11 |
| 5 | GV-10/7-250 | 1000 | 10 | 0.7 | 25 | 1400×900×1100 | 1000 | 11 |
| 6 | GV-23/4-250 | 2000 | 23 | 0.4 | 25 | 2600×1800×1600 | 3000 | 18.5 |
| 7 | GL-20/12-160 | 1000 | 20 | 1.2 | 16 | 2200×1800×1300 | 3000 | 7.5 |
| 8 | GL-70/5-35 | 1500 | 70 | 0.5 | 3.5 | 2000×1800×1200 | 3000 | 15 |
| 9 | GL-60/0.05-4 | 4000 | 60 | 0.005 | 0.4 | 2400×1800×1600 | 3000 | 15 |
| 10 | GD-220/12-90 | 4000 | 220 | 1.2 | 9 | 3000×2000×1800 | 4000 | 37 |
| 11 | GD-130/8-300 | 6500 | 130 | 0.8 | 35 | 3500×2300×1800 | 4500 | 45 |
| 12 | GD-500/20-250 | 9000 | 500 | 2 | 25 | 3800×2300×2000 | 100000 | 75 |
The equipment size and weight are for reference only, and the final design shall prevail.
Case Study
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Frequently Asked Questions
A diaphragm compressor utilizes a flexible metal diaphragm to physically separate the process gas chamber from the hydraulic oil system. Because no lubricating oil enters the compression chamber, the gas remains absolutely clean and uncontaminated.
The system uses a three-layer diaphragm structure. If any layer ruptures, the pressure change in the middle layer immediately triggers a sensor alarm and shuts down the compressor, preventing any gas leakage or mixing of process gas and hydraulic oil.
All electrical systems, including motors, sensors, and control cabinets, comply with Ex d IIB T4 explosion-proof standards or higher, making them safe for hazardous gas environments like natural gas compression.
Yes. For applications containing trace corrosive components like H2S, all wetted parts are made of high-grade corrosion-resistant materials such as 316L stainless steel and undergo strict passivation treatment.
Depending on the specific model and site conditions, these compressors can be configured with either water-cooled or air-cooled systems to maintain safe operating temperatures.