High-Efficiency Ethylene Compressors from China Factory - Leading Suppliers for Ultra-Low-Temperature Applications
Ethylene Diaphragm Compressor Advantages
01
Absolutely Oil-Free & Ultra-High Purity Assurance
The diaphragm isolation technology ensures that the gas is 100% free from contact with lubricating oil during compression, achieving a compression purity of over 99.999%. This is critical for "polymer-grade" ethylene used as a polymerization feedstock, where even trace oil contamination can affect catalyst activity, leading to product quality degradation or even polymerization failure.
02
Static Seal Zero Leakage & Intrinsic Safety
The entire gas chamber employs a static seal structure, fundamentally eliminating the possibility of gas leakage. For ethylene, which has a wide explosion limit and high hazard level, this feature provides the highest level of safety assurance, effectively preventing the accumulation of flammable gas in the plant area and meeting the most stringent safety production and environmental protection requirements.
Key Design Points for Ethylene Diaphragm Compressors
01
Precise Anti-Liquefaction & Temperature Control Design
Given that the critical temperature of ethylene (9.21°C) is close to ambient temperature, it is highly prone to liquefaction during compression and cooling, which can cause "liquid slugging." The design must include accurate thermodynamic calculations to ensure that the discharge temperature and the gas temperature after inter-stage cooling always remain above the dew point at the corresponding partial pressure, with a sufficient safety margin. The cooling system must be efficient and reliable to prevent gas condensation within the chamber or piping.
02
High-Pressure & Material Compatibility Design
To meet the demands of processes such as ultra-high-pressure polyethylene synthesis, the compressor must adopt a multi-cylinder series arrangement or a specially reinforced structure to achieve discharge pressures exceeding 100 MPa. Materials for wetted parts are typically selected as 316L stainless steel or higher-grade alloys to ensure high-pressure strength while providing excellent chemical inertness, preventing any adverse reactions with ethylene. The use of copper and its alloys is strictly prohibited to avoid catalyzing the formation of hazardous polymers from ethylene.
03
Multi-Layered Safety Monitoring & Protection System
A three-layer diaphragm structure is standard, equipped with a diaphragm rupture monitoring and alarm device. If the inner diaphragm is damaged, the system can immediately trigger an alarm and safely shut down. The system must integrate interlocks such as high discharge temperature and pressure alarms, as well as oil pressure protection. For process connections, nitrogen purge connections should be to allow for inerting and purging of the system before startup, ensuring safe operation.
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
18
→
Flow (Nm³/h)
5.3
→
Inlet pressure (barg)
12.5
→
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-18/5.3-12.5 | 500 | 18 | 0.53 | 1.25 | 1000×800×1100 | 800 | 5.5 |
| 2 | GZ-30/20-60 | 500 | 30 | 2 | 6 | 1100×800×1100 | 800 | 7.5 |
| 3 | GZ-22/7-30 | 1000 | 22 | 0.7 | 3 | 1200×800×1100 | 800 | 11 |
| 4 | GV-20/7-150 | 1000 | 20 | 0.7 | 15 | 1400×800×1100 | 900 | 11 |
| 5 | GV-118/（34.5-44.5）-55 | 1000 | 118 | 3.45-4.45 | 5.5 | 1400×800×1100 | 1000 | 11 |
| 6 | GV-160/（0.35-10.5）-30 | 2000 | 160 | 0.035-1.05 | 3 | 2600×1800×1600 | 3000 | 18.5 |
| 7 | GL-55/3 | 1000 | 55 | Atmospheric | 0.3 | 2200×1800×1600 | 2800 | 11 |
| 8 | GL-130/0.3-0.5 | 1500 | 130 | 0.03 | 0.05 | 2300×1800×1600 | 2800 | 11 |
| 9 | GL-40/0.2-25 | 2000 | 40 | 0.02 | 2.5 | 2300×1800×1600 | 2800 | 18.5 |
| 10 | GD-180/2.3-61.3 | 4500 | 180 | 0.23 | 6.13 | 3800×2300×1800 | 6000 | 45 |
| 11 | GD-1076/（17-24）-125 | 10000 | 1076 | 1.7-2.4 | 12.5 | 4200×3200×2200 | 12000 | 132 |
| 12 | GD-945/11.7-126 | 15000 | 945 | 1.17 | 12.6 | 4200×3500×2200 | 12000 | 160 |
The equipment size and weight are for reference only, and the final design shall prevail.
CASE STUDY
Frequently Asked Questions (FAQ)
Diaphragm isolation technology ensures that the gas is 100% free from contact with lubricating oil during compression, achieving a purity of over 99.999%. This is critical for "polymer-grade" ethylene used as a polymerization feedstock, where even trace oil contamination can affect catalyst activity, leading to product quality degradation or polymerization failure.
The entire gas chamber employs a static seal structure, fundamentally eliminating the possibility of gas leakage. Because ethylene has a wide explosion limit and high hazard level, this static seal design provides the highest level of safety assurance, preventing the accumulation of flammable gas in the plant area.
The critical temperature of ethylene is 9.21°C, which is close to ambient temperature. This makes it highly prone to liquefaction during compression and cooling, causing "liquid slugging." Accurate thermodynamic calculations are integrated to ensure that the discharge temperature and the gas temperature after inter-stage cooling always remain above the dew point with a sufficient safety margin.
Wetted parts are typically made of 316L stainless steel or higher-grade alloys to handle high-pressure strength (exceeding 100 MPa) while providing chemical inertness. The use of copper and its alloys is strictly prohibited to avoid catalyzing the formation of hazardous polymers from ethylene.
A standard three-layer diaphragm structure is equipped with a diaphragm rupture monitoring and alarm device. If the inner diaphragm is damaged, the system immediately triggers an alarm and safely shuts down. The system also integrates interlocks for high discharge temperature, pressure alarms, oil pressure protection, and nitrogen purge connections.