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| Warranty: | 2 Years |
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| No. | Model | Gas | Pattern | Capacity (m³/min) | Pressure (MPa) | Size L x W x H (mm) | Weight (t) | Power (kW) | Voltage (V) |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ZW-1/150 O2 | Oxygen | 2-row 4-stage | 1 | 15.00 | 2495 x 1800 x 2945 | 4.00 | 30 | 380 |
| 2 | ZW-1/165 O2 | Oxygen | 2-row 4-stage | 1 | 16.50 | 2495 x 1800 x 2945 | 4.00 | 30 | 380 |
| 3 | ZW-1.67/150(165) | O2/N2 | 2-row 4-stage | 1.67 | 15.00 / 16.50 | 2495 x 1800 x 2945 | 4.00 | 37 | 380 |
| 4 | ZW-1.82/150 O2 | Oxygen | 2-row 4-stage | 1.82 | 15.00 | 2495 x 1800 x 2945 | 4.00 | 37 | 380 |
| 5 | ZW-1.82/165 O2 | Oxygen | 2-row 4-stage | 1.82 | 16.50 | 2495 x 1800 x 2945 | 4.00 | 45 | 380 |
| 6 | 3ZW-3/150(165) O2/N2 | O2/N2 | 3-row 5-stage | 3 | 15.00 / 16.50 | 2575 x 2064 x 3407 | 4.50 | 55 | 380 |
| 7 | ZW-3.3/150 O2 | Oxygen | 3-row 5-stage | 3.3 | 15.00 | 2575 x 2064 x 3407 | 4.80 | 55 | 380 |
| 8 | ZW-3.3/165 O2 | Oxygen | 3-row 5-stage | 3.3 | 16.50 | 2575 x 2064 x 3407 | 4.80 | 55 | 380 |
| 9 | ZW-4.2/150 O2 | Oxygen | 3-row 5-stage | 4.2 | 15.00 | 2900 x 2300 x 3500 | 5.60 | 75 | 380 |
| 10 | ZW-4.2/165 O2 | Oxygen | 3-row 5-stage | 4.2 | 16.50 | 2900 x 2300 x 3500 | 5.60 | 75 | 380 |
| 11 | ZW-5/150 O2 | Oxygen | 3-row 5-stage | 5 | 15.00 | 2900 x 2300 x 3500 | 5.60 | 90 | 380 |
| 12 | ZW-5/165 O2 | Oxygen | 3-row 5-stage | 5 | 16.50 | 2900 x 2300 x 3500 | 5.60 | 90 | 380 |
| 13 | ZW-1/150 N2 | Nitrogen | 2-row 4-stage | 1 | 15.00 | 2495 x 1800 x 2945 | 4.00 | 30 | 380 |
| 14 | ZW-1/165 N2 | Nitrogen | 2-row 4-stage | 1 | 16.50 | 2495 x 1800 x 2945 | 4.00 | 30 | 380 |
| 15 | ZW-1.67/150 N2 | Nitrogen | 2-row 4-stage | 1.67 | 15.00 | 2495 x 1800 x 2945 | 4.00 | 37 | 380 |
| 16 | ZW-1.67/165 N2 | Nitrogen | 2-row 4-stage | 1.67 | 16.50 | 2495 x 1800 x 2945 | 4.00 | 37 | 380 |
| 17 | ZW-1.82/150 N2 | Nitrogen | 2-row 4-stage | 1.82 | 15.00 | 2495 x 1800 x 2945 | 4.00 | 37 | 380 |
| 18 | ZW-1.82/165 N2 | Nitrogen | 2-row 4-stage | 1.82 | 16.50 | 2495 x 1800 x 2945 | 4.00 | 45 | 380 |
| 19 | ZW-3/150 N2 | Nitrogen | 3-row 5-stage | 3 | 15.00 | 2575 x 2064 x 3407 | 4.50 | 55 | 380 |
| 20 | ZW-3/165 N2 | Nitrogen | 3-row 5-stage | 3 | 16.50 | 2575 x 2064 x 3407 | 4.50 | 55 | 380 |
| 21 | ZW-4.2/150 N2 | Nitrogen | 3-row 5-stage | 4.2 | 15.00 | 2900 x 2300 x 3500 | 5.60 | 75 | 380 |
| 22 | ZW-4.2/165 N2 | Nitrogen | 3-row 5-stage | 4.2 | 16.50 | 2900 x 2300 x 3500 | 5.60 | 75 | 380 |
| 23 | ZW-5/150 N2 | Nitrogen | 3-row 5-stage | 5 | 15.00 | 2900 x 2300 x 3500 | 5.60 | 90 | 380 |
| 24 | ZW-5/165 N2 | Nitrogen | 3-row 5-stage | 5 | 16.50 | 2900 x 2300 x 3500 | 5.60 | 90 | 380 |
| 25 | ZW-1/150 H2 | Hydrogen | 2-row 4-stage | 1 | 15.00 | 2495 x 1800 x 2945 | 4.00 | 30 | 380 |
| 26 | ZW-1.34/150 H2 | Hydrogen | 2-row 4-stage | 1.34 | 15.00 | 2495 x 1800 x 2945 | 4.00 | 37 | 380 |
| 27 | ZW-1.67/150 H2 | Hydrogen | 2-row 4-stage | 1.67 | 15.00 | 2495 x 1800 x 2945 | 4.00 | 37 | 380 |
| 28 | ZW-1.82/150 H2 | Hydrogen | 2-row 4-stage | 1.82 | 15.00 | 2495 x 1800 x 2945 | 4.00 | 37 | 380 |
| 29 | ZW-3.3/150 H2 | Hydrogen | 3-row 5-stage | 3.3 | 15.00 | 2575 x 2064 x 3407 | 4.80 | 55 | 380 |
| 30 | ZW-4.2/150 H2 | Hydrogen | 3-row 5-stage | 4.2 | 15.00 | 2900 x 2300 x 3500 | 5.60 | 75 | 380 |
| 31 | ZW-5/150 H2 | Hydrogen | 3-row 5-stage | 5 | 15.00 | 2900 x 2300 x 3500 | 5.60 | 90 | 380 |
The 3ZW-1.67/165 is a compact high-pressure oil-free reciprocating piston compressor designed for oxygen and nitrogen cylinder filling service, delivering 1.67 m3/min at 16.5 MPa discharge pressure with a maximum working pressure of 15.0 MPa for standard cylinder filling. The 2-row 4-stage configuration divides the total compression ratio from suction to 16.5 MPa into four progressive stages, maintaining controlled discharge temperatures at each stage and providing a safe thermal margin throughout the compression sequence. Belt drive with anti-static specification transmits power from the 37 kW, 380V motor to the compressor crankshaft, eliminating electrostatic discharge risk in oxygen-enriched filling environments.
The 3ZW-1.67/165 occupies the capacity level between small single-cylinder high-pressure compressors and the larger 3ZW-3/165, making it the correct choice for small to medium cylinder filling operations requiring more output than a minimal single-cylinder unit but not yet at the scale justifying the larger machine. At 1.67 m3/min, the 3ZW-1.67/165 fills approximately 20 to 30 standard 40-litre cylinders per hour, covering the production requirement of a small regional cylinder filling station or a medium hospital medical gas supply centre.
Oil-free compression throughout all four stages is the fundamental safety requirement for cylinder filling service. The 3ZW-1.67/165 uses PTFE composite piston rings and rod packings in all four stages, with no lubricant injection at any cylinder. All gas-contact materials are selected and certified for oxygen compatibility - verified alloy steel valve components, PTFE or PEEK polymer sealing elements, and no copper alloys in any gas-contact position. The oxygen-service material certificate covering all four stages is supplied as a standard document with every 3ZW-1.67/165.
The 4-stage compression sequence of the 3ZW-1.67/165 provides a key advantage over 2 or 3-stage designs at this output pressure: each stage operates at a lower individual pressure ratio, producing a lower per-stage discharge temperature and a wider thermal safety margin against adiabatic compression ignition in high-pressure oxygen service. Stage discharge temperature transmitters with automatic high-temperature shutdown are fitted to all four stages, providing continuous independent thermal monitoring throughout the compression sequence. The shutdown setpoints are individually configured for each stage.
The 2-row frame of the 3ZW-1.67/165 keeps the machine compact and lightweight at 4.00 tonnes, with a footprint of 2495 x 1800 x 2945 mm suitable for installation in existing cylinder filling rooms without civil modifications. The 37 kW, 380V motor connects to standard low-voltage industrial supply without specialist electrical infrastructure, reducing installation cost and complexity to the minimum required for a safe cylinder filling operation.
Small regional cylinder filling stations: Small industrial gas distributors filling oxygen and nitrogen cylinders for local welding workshops, metal fabrication businesses, and industrial customers require a reliable, safe high-pressure compressor sized for their actual production volume. The 3ZW-1.67/165 at 20 to 30 cylinders per hour covers the filling requirement of a small regional station without the excess capital cost of a larger machine running at low utilisation.
Medical oxygen cylinder filling: Hospital medical gas departments and independent medical gas suppliers filling oxygen cylinders for patient use require oil-free compression certified to medical grade. The 3ZW-1.67/165 compact design and 380V supply make it suitable for installation in existing hospital facility buildings, providing on-site medical oxygen cylinder filling capability without the civil and electrical infrastructure requirements of larger machines.
Laser cutting assist gas supply: Metal fabrication shops and laser cutting service centres using nitrogen as a cutting assist gas for stainless steel and aluminium processing fill nitrogen cylinders or manifold banks from a dedicated high-pressure compressor. The 3ZW-1.67/165 in nitrogen service covers the nitrogen filling requirement of a facility operating two to four high-power laser cutting machines.
University and research laboratory: Research institutions requiring high-pressure oxygen and nitrogen for experimental reactors, analytical instruments, and materials testing equipment use the 3ZW-1.67/165 as a centralised laboratory gas compression system, filling cylinders on demand from low-pressure generator or bulk supply sources.
Fire brigade and emergency services: Compressed air and breathing gas cylinder filling for fire brigade breathing apparatus and rescue equipment requires oil-free high-pressure compression. The 3ZW-1.67/165 compact footprint and standard 380V supply allow installation in existing fire station facilities serving a district-level fire brigade operation.
Aquaculture and fish farming: High-purity oxygen cylinder filling for intensive aquaculture operations requiring portable oxygen supply at remote pond or tank locations uses the 3ZW-1.67/165 as a dedicated oxygen cylinder filling compressor, providing self-sufficient oxygen supply without dependence on third-party deliveries to remote sites.
Safety Warning: This compressor is rated for oxygen and nitrogen cylinder filling service only. Oxygen service requires verified oil-free cylinder condition, anti-static belt, oxygen-compatible materials throughout, and mandatory stage temperature monitoring before each operating period. Never introduce lubricating oil into any gas-contact component. Never exceed the maximum cylinder working pressure of 15.0 MPa. Follow all applicable national regulations for high-pressure oxygen cylinder filling operations.
Comparison with Similar Products:
Specialist high-pressure compressor manufacturers supply oil-free reciprocating compressors for oxygen and nitrogen cylinder filling in the 1.5 to 2.5 m3/min class at 15 to 20 MPa, serving the industrial gas, medical gas, fire service, and diving equipment markets. The 3ZW-1.67/165 provides 4-stage compression with individual stage temperature monitoring and shutdown, anti-static belt drive as standard, full oxygen-service material certification covering all four stages, compact 2-row frame suitable for existing cylinder filling rooms, and ISO 9001 certified manufacturing quality at a competitive capital cost with direct factory spare parts support covering all four stage valve and ring sets as a complete annual maintenance kit.
EVER POWER is a national second-level enterprise and a provincial advanced enterprise. Xinlan Company currently has over 350 employees, total assets of 300 million RMB, and more than 600 sets of various production and processing equipment. The company has specialized production plants including a foundry, machining plant, pressure vessel plant, and assembly plant, as well as functional departments such as a compressor research institute, sales department, marketing department, customer service office, finance department, manufacturing department, supply department, process equipment department, and general office.
EVER POWER produces nearly a thousand varieties of compressors, which are now widely used in industries such as petrochemicals, air separation and cryogenics, energy conservation and environmental protection, coal mining, food fermentation, and glass building materials. Its products enjoy a high reputation domestically and are exported to many countries.
EVER POWER focuses on the design and manufacturing of reciprocating compressors and Class I, II, and III pressure vessels. Its compressor products are currently divided into two main categories: reciprocating and screw compressors. The reciprocating compressors currently include numerous series such as M, H, D, L, P, and Z. Our products cover a single-unit pressure range of 0.1~600 Nm³/min; a pressure range of 0.1~32.0 MPa; a piston force of 1.5~50T; and a drive power of 5.5~5000 KW. Compressible media include: air, gas, oxygen, carbon dioxide, carbon monoxide, natural gas, methane, coke oven (blast furnace) gas, coalbed methane, biogas, acetylene, chloromethane, vinyl chloride, mixed gases, liquefied petroleum gas, petroleum-associated gases, and various flammable and explosive raw material gases. Our company aims to become one of the largest and most comprehensive manufacturers of large and medium-sized reciprocating process compressors in China.
EVER POWER offers customized compressor system solutions for different scales, based on the design concepts of equipment integration, energy-saving operation, intelligent control, and convenient maintenance. Integrated skid-mounted power systems can be provided according to customer needs, with optional soft start, PLC control, frequency converter systems, and remote and wireless monitoring systems. We can provide designs for special working conditions and environments such as outdoor, low temperature, high altitude, and marine environments, as well as supporting power designs such as electric motors, internal combustion engines, and steam turbines.
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