Description
Two-Column Two-Stage · Oil-Free · 0.56 – 1.60 MPa
LW Series Oil-Free Air Compressors
The LW series covers the broadest pressure and capacity band in the range — from compact 11 m³/min units to 65 m³/min high-volume machines — spanning discharge pressures of 0.56 MPa through 1.60 MPa. Available in 380 V, 380/6k, and 6k/10k V electrical configurations to match facility distribution architecture.
LW-42/7-A — 42 m³/min · 0.70 MPa · 240 (250) kW · 380/6k or 10k V
LW Series: Mid-Range Oil-Free Reciprocating Compressors for Continuous Industrial Air Supply
The LW series is the most versatile group in the Ever-Power oil-free compressor portfolio. With nineteen catalogued models between 11 m³/min and 65 m³/min — across four discharge-pressure brackets (0.56, 0.70, 0.75, 0.80, 1.00, and 1.60 MPa) — the LW range accommodates the precise flow-pressure combination demanded by most mid-scale industrial applications without over-specifying the drive motor or installing surplus compressor capacity.
All LW units employ a two-column, two-stage reciprocating design with oil-free cylinders. PTFE composite piston rings and guide elements operate without cylinder-bore lubrication, yielding ISO 8573-1 Class 0 air quality at the discharge flange. The crankshaft — forged from 42CrMo4 alloy steel per DIN EN 10083-3 — is supported by precision hydrodynamic journal bearings in a sealed, oil-lubricated crankcase that is structurally isolated from all gas-path components.
Electrical options span from 380 V (suitable for facilities with LV distribution) through 380 V / 6 kV dual-rated configurations up to dedicated 6 kV or 10 kV medium-voltage supply — making the LW series compatible with the majority of industrial power distribution systems encountered in the target export markets including Australia, the Netherlands, and the United Kingdom. All motors conform to IEC 60034-1 thermal class F insulation as a minimum.
Technical Design Features
Pressure Range Flexibility
LW models are catalogued at six distinct discharge-pressure levels (0.56, 0.70, 0.75, 0.80, 1.00, and 1.60 MPa), matching common pneumatic-circuit operating pressures without requiring pressure-reducing stations that add flow restriction and energy loss downstream.
Compact Footprint per kW
The LW-11/7-A delivers 11 m³/min at 65 kW from a frame measuring only 2340 × 910 × 2070 mm and 1.80 t — making it deployable in plant rooms where larger DW-series machines would require structural modifications. The LW-42/7-A scales proportionally: 240 kW in a 2890 × 1600 × 2190 mm envelope at 5.0 t.
Oil-Free Discharge — ISO 8573-1 Class 0
No cylinder lubricant enters the gas flow. The process-side bore is sealed by PTFE-composite rings with a verified oil carryover of ≤ 0.01 mg/m³ — meeting the most stringent purity class in the ISO 8573-1 standard, required by pharmaceutical GMP, food production, and electronics manufacturing environments.
Broad Electrical Compatibility
Single models such as the LW-48/8-A are rated 380 V / 6k V / 10k V, allowing the same compressor to be ordered against different site voltage conditions without mechanical modification. Dual-voltage nameplate ratings reduce procurement complexity for projects with multi-site deployment.
LW Series — Full Technical Specifications
| Model | Pattern | Capacity (m³/min) | Discharge Pressure (MPa) | Compressor Size L×W×H (mm) | Weight (t) | Power (kW) | Voltage (V) |
|---|---|---|---|---|---|---|---|
| LW-43.5/5.7-A | 二列二级 | 43.5 | 0.57 | 2890×1600×2198 | 5.00 | 240 (250) | 380/6k or 10k |
| LW-55/5.8-A | 二列二级 | 55 | 0.58 | 2920×1975×2560 | 6.50 | 315 | 380/6k or 10k |
| LW-40/6-A | 二列二级 | 40 | 0.60 | 2890×1600×2173 | 4.12 | 220 | 380/6k or 10k |
| LW-54/6-A | 二列二级 | 54 | 0.60 | 2920×1975×2560 | 6.50 | 315 | 380/6k or 10k |
| LW-60/6-A | 二列二级 | 60 | 0.60 | 3312×1900×2324 | 6.50 | 315 | 6k or 10k |
| LW-11/7-A | 二列二级 | 11 | 0.70 | 2340×910×2070 | 1.80 | 65 | 380 |
| LW-13/7-A | 二列二级 | 13 | 0.70 | 2632×1550×2380 | 3.00 | 90 | 380 |
| LW-15/7-A | 二列二级 | 15 | 0.70 | 2632×1550×2380 | 3.00 | 90 | 380 |
| LW-22/7-A | 二列二级 | 22 | 0.70 | 2632×1550×2330 | 3.00 | 132 | 380 |
| LW-26/7-A | 二列二级 | 26 | 0.70 | 2750×1550×2150 | 4.20 | 160 | 380 |
| LW-32/7-A | 二列二级 | 32 | 0.70 | 2890×1600×2173 | 4.12 | 200 | 380 |
| LW-36/7-A | 二列二级 | 36 | 0.70 | 2890×1600×2173 | 4.12 | 220 | 380/6k or 10k |
| LW-42/7-A | 二列二级 | 42 | 0.70 | 2890×1600×2190 | 5.00 | 240 (250) | 380/6k or 10k |
| LW-65/7-A | 二列二级 | 65 | 0.70 | 2612×4060×2860 | 6.50 | 400 | 6k or 10k |
| LW-45/7.5-A | 二列二级 | 45 | 0.75 | 2890×1600×2198 | 5.00 | 280 | 380/6k or 10k |
| LW-48/8-A | 二列二级 | 48 | 0.80 | 2630×1655×2235 | 6.50 | 280 | 380/6k or 10k |
| LW-50/8-A | 二列二级 | 50 | 0.80 | 2360×1685×2235 | 6.50 | 300 | 380/6k or 10k |
| LW-53/8-A | 二列二级 | 53 | 0.80 | 3312×1900×2324 | 6.50 | 350 | 380/6k or 10k |
| LW-55/8-A | 二列二级 | 55 | 0.80 | 2380×1500×2560 | 6.50 | 350 | 6k or 10k |
| LW-60/8-A | 二列二级 | 60 | 0.80 | 2380×1500×2560 | 6.50 | 350 | 6k or 10k |
| LW-10/10-A | 二列二级 | 10 | 1.00 | 2340×910×2070 | 1.80 | 75 | 380 |
| LW-22/10-A | 二列二级 | 22 | 1.00 | 2632×1550×2332 | 3.00 | 160 | 380 |
| LW-42/10-A | 二列二级 | 42 | 1.00 | 2380×1600×2560 | 6.00 | 315 | 380/6k or 10k |
| LW-9.6/12-A | 二列二级 | 9.6 | 1.20 | 2550×910×2013 | 1.80 | 75 | 380 |
| LW-25.7/12-A | 二列二级 | 25.7 | 1.20 | 2760×1600×2190 | 3.85 | 200 | 380 or 415 |
| LW-9/16-A | 二列二级 | 9 | 1.60 | 2550×910×2013 | 1.80 | 75 | 380 |
* LW-25.7/12-A is rated for 380 V or 415 V supply — suited to Australian and UK 415 V industrial distribution.
Typical Application Sectors
The LW series is selected for mid-volume process air applications that require verified Class 0 oil-free output across a broad range of operating pressures. Common deployment scenarios include:
Frequently Asked Questions
Is the LW-25.7/12-A compatible with 415 V Australian industrial supply?
Yes. The LW-25.7/12-A carries a dual nameplate rating of 380 V or 415 V, making it directly deployable on Australian AS/NZS 3000-compliant 415 V three-phase distribution without a transformer or voltage converter. Motor insulation is Class F per IEC 60034-1. Confirm the site’s prospective fault current rating against the motor starter documentation before final connection.
How does LW model selection differ from DW for a 40 – 55 m³/min requirement?
Both series overlap in the 40 – 55 m³/min band. LW-framed units (e.g. LW-42/7-A at 5.0 t, LW-48/8-A at 6.5 t) are lighter and dimensionally more compact than DW counterparts at equivalent flow, suited to installations with restricted floor loading or head clearance. DW models in the same band tend to carry heavier cast-iron frames designed for higher duty-cycle environments and medium-voltage-only electrical configurations.
What inlet filtration is required to achieve ISO 8573-1 Class 0 at the discharge?
The compressor’s PTFE piston rings deliver oil-free compression, but achieving Class 0 at the point of use also requires an inlet filter rated minimum F7 (EN 779 / ISO 16890 ePM1 ≥ 50%) to protect the valve seats from abrasive particulate, and an aftercooler with moisture separator to reduce water vapour load before downstream desiccant drying. The compressor’s discharge does not supply pre-dried air; a drying system sized to the duty flow is the end-user’s responsibility.
Request Technical Quotation — LW Series Oil-Free Compressors
Specify your target flow rate (m³/min), discharge pressure (MPa), and voltage class. Our team will confirm the closest model with dimensional drawings within 24 hours.
