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OEM 30kW Water Lubricated Oil Free VSD Screw Air Compressor 380V 400V 415V Industrial Air Compressor Suppliers, Factory
Product Description
Introduction
The EOWV-30A/W is a 30kW oil-free (oil-less) rotary screw air compressor designed to deliver 100% oil-free compressed air for industries where air purity is critical. With three selectable pressure levels (0.8 / 1.0 / 1.25 MPa) and a maximum flow of 5.20 m³/min, it provides reliable, contaminant-free air without the use of lubricating oil in the compression chamber. Built with advanced water-injected or dry-running screw technology (factory-configurable), an intelligent PLC control system, and a choice of air or water cooling, this model is the ideal solution for applications that demand Class 0 oil-free air according to ISO 8573-1 standards.
Advantages
| Advantage Dimension | Description |
|---|---|
| 100% Oil-Free Air | Compression chamber operates without any oil lubrication – eliminates oil carry-over, ensuring absolutely pure air for sensitive production processes. |
| Class 0 Certification | Meets ISO 8573-1 Class 0 requirements – suitable for food, beverage, pharmaceutical, and electronics industries with zero contamination risk. |
| Multi-Pressure Flexibility | Three preset pressure levels (0.8 / 1.0 / 1.25 MPa) selectable via the control panel, adapting to different end-user equipment needs. |
| Energy Efficient | Optimised rotor profile and precision clearances reduce internal leakage, delivering high volumetric efficiency without the parasitic losses of oil circulation systems. |
| Smart Control | 7-inch colour touchscreen with PLC-based controller, offering real-time monitoring of pressure, temperature, current, running hours, and fault diagnostics. RS485 port for remote monitoring. |
| Two Cooling Options | Air-cooled (A) – ideal for water-scarce sites; Water-cooled (W) – offers stable cooling for hot climates or existing cooling water circuits. |
| Low Maintenance | No oil filters, no oil separator elements, and no oil changes – significantly reduces consumable costs and service time compared to oil-injected compressors. |
| Compact Footprint | Occupies only approx. 1.78 m² (1550×1150 mm), suitable for space-constrained machine rooms. |
| Low Noise | Operating noise level approx. 72±3 dB(A) with standard acoustic enclosure. |
Technical Specifications
General Specifications
| Parameter | Specification |
|---|---|
| Model | EOWV-30A (Air-Cooled) / EOWV-30W (Water-Cooled) |
| Compression Type | Oil-Free (Oil-Less) Rotary Screw |
| Rated Power | 30 kW (approx. 40 HP) |
| Power Supply | 380V / 50Hz / 3Ph (other voltages available upon request) |
| Discharge Pressure / Free Air Delivery | 0.8 MPa → 5.20 m³/min 1.0 MPa → 4.20 m³/min 1.25 MPa → 3.18 m³/min |
| Drive Type | Direct drive via flexible coupling |
| Outlet Connection | 1-1/4" female thread (BSP or NPT optional) |
| Dimensions (L×W×H) | 1550 × 1150 × 1500 mm |
| Net Weight | 950 kg |
| Noise Level | 72±3 dB(A) measured at 1 m distance |
| Air Quality Standard | ISO 8573-1 Class 0 (oil-free) |
Operating Specifications
| Parameter | Specification |
|---|---|
| Discharge Temperature | ≤ Ambient +15°C (air-cooled) / ≤ Ambient +8°C (water-cooled) |
| Cooling Water Flow (W version) | Approx. 6–8 m³/h |
| Cooling Water ΔT (in/out) | Approx. 5–8°C |
| Motor Protection / Insulation Class | IP54 / Class F |
| Starting Method | Y-Δ star-delta starter (standard) / VFD soft start (optional) |
Cooling System Details
| Item | EOWV-30A (Air-Cooled) | EOWV-30W (Water-Cooled) |
|---|---|---|
| Cooler Type | Aluminium plate-fin | Shell-and-tube (copper / stainless steel tubes) |
| Cooling Fan Power | 0.37 kW | — |
| Suitable Ambient Temp. | 0–45°C | 0–50°C (with cooling tower) |
Application Industries
The EOWV-30A/W is specifically designed for industries where oil contamination is unacceptable. Typical applications include:
| Industry Sector | Typical Applications |
|---|---|
| Food & Beverage | Filling machines, packaging lines, bottle blowing, ingredient conveying, clean-in-place (CIP) systems |
| Pharmaceutical & Medical | Tablet pressing, blister packaging, fermentation aeration, cleanroom pneumatic controls, surgical instrument drying |
| Electronics & Semiconductors | SMT pick-and-place, PCB drilling spindle cooling, cleanroom air curtains, wafer handling |
| Chemical & Petrochemical | Process gas boosting, analytical instrumentation, reactor agitation, hazardous area pneumatic controls |
| Textile & Nonwoven | Air-jet weaving, spunlace hydro-entanglement, drying blow-off |
| Automotive Paint Shops | Paint spraying, powder coating, surface preparation – zero oil vapour to avoid paint defects |
| Laboratories & Research | Wind tunnels, material testing, analytical instruments, pilot plant air supply |
| Dental & Medical Equipment | Dental chair air supply, surgical tool drives, hospital central air systems |
| Precision Machining | Air bearings, high-speed spindles, laser cutting assist gas |
| Environmental Monitoring | Air sampling, emissions testing, calibration gas preparation |
FAQ
Q1
What does "oil-free" really mean? Is the compressor completely without oil?
A: Yes – the compression chamber contains no oil at all. Unlike oil-injected screw compressors that use oil for sealing, cooling, and lubrication inside the rotor housing, the EOWV-30A/W uses either water-injected or dry-running technology (depending on configuration). The only oil present is in the gearbox and bearings, which are completely sealed off from the air path. The delivered compressed air contains 0 ppm oil, meeting ISO 8573-1 Class 0.
Q2
How do I choose between air-cooled (A) and water-cooled (W)?
A:
- Choose air-cooled (A) if your site has no cooling water source, water quality is poor, or ambient summer temperature does not exceed 45°C.
- Choose water-cooled (W) if you already have a circulating cooling water system, the workshop is dusty, or temperatures often exceed 45°C – water cooling provides more stable discharge temperatures.
Q3
Is this compressor more expensive to maintain than an oil-injected one?
A: No – maintenance costs are generally lower. Since there are no oil filters, no oil separators, and no regular oil changes, consumable expenses are significantly reduced. However, water-injected versions may require periodic water filter changes and occasional descaling depending on water quality. Overall, total maintenance cost over 10,000 hours is typically 20–30% lower than oil-injected equivalents.
Q4
Can I use this compressor for breathing air applications?
A: Yes, but additional downstream purification (activated carbon filters, catalytic converters, and sterile filtration) is required to meet EN 12021 or Grade D breathing air standards. The EOWV-30A/W provides an excellent oil-free base, but CO, CO₂, moisture, and odour removal must be addressed with proper after-treatment.
Q5
The maximum flow is 5.20 m³/min at 0.8 MPa. Will it drop at higher pressures?
A: Yes – as with all positive displacement compressors, air delivery decreases as discharge pressure increases. At 1.0 MPa it delivers 4.20 m³/min, and at 1.25 MPa it delivers 3.18 m³/min. Choose your operating pressure based on the highest demand of your equipment to avoid oversizing or under-sizing.
Q6
Does this unit require special foundation or installation?
A: No – the compressor comes with an integrated steel base and built-in vibration isolators. A flat floor with a bearing capacity of ≥1000 kg/m² is sufficient. Allow at least 1 metre of clearance around the unit for ventilation and maintenance access.
