ETSVII Series Two-Stage Screw Air Compressor – 250kW Model for Chemical Industry Applications

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250kW Two-Stage Screw Air Compressor for Chemical Plants – High Efficiency & Heavy Duty

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ETSVII-250A Industrial Two-Stage Air Compressor – 55.0 m³/min, Chemical Factory Equipment

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Two-Stage Screw Air Compressor 250kW – Energy-Saving Solution for Chemical Manufacturing

Four Short Descriptions

1. 250kW two-stage screw compressor, 55.0 m³/min max flow, 0.7–1.3 MPa – for heavy industrial use.

2. Two-stage compression + inter-stage cooling – reduces energy loss, delivers higher efficiency than single-stage.

3. Built for 24/7 chemical plant operation – robust, reliable, low maintenance.

4. 3900×2100×2200 mm, 6700 kg – heavy-duty design with DN125 outlet for high-volume air delivery.

ETSVII-250A Two-Stage Screw Air Compressor – Complete Product Overview

Introduction

The ETSVII-250A is a 250kW two-stage screw air compressor designed for demanding industrial applications, particularly in chemical plants, manufacturing facilities, and heavy processing environments. With a maximum air delivery of 55.0 m³/min at 0.7 MPa and a wide pressure range from 0.7 to 1.3 MPa, this compressor delivers high-volume, stable compressed air for continuous 24/7 operations.

Unlike single-stage compressors that compress air in one step, the ETSVII-250A employs two-stage compression with inter-stage cooling, reducing the compression ratio per stage and significantly improving overall energy efficiency. The result is lower operating temperatures, reduced internal leakage, extended component life, and measurable energy savings compared to single-stage alternatives.

Advantages

Technical Specifications

ETSVII-250A General Specifications

ETSVII Series Full Specifications

Application

The ETSVII-250A two-stage screw compressor is specifically designed for industries requiring high-volume, high-pressure compressed air with superior energy efficiency.

FAQ

Q1: Why choose a two-stage compressor over a single-stage model?
A: Two-stage compressors compress air in two steps with cooling in between. This reduces the compression ratio per stage, lowers discharge temperatures, and improves volumetric efficiency. The result is 5–12% energy savings compared to single-stage compressors at the same pressure, along with extended component life and reduced maintenance costs.

Q2: What is the maximum pressure this compressor can deliver?
A: The ETSVII series can operate at pressures from 0.7 MPa to 1.3 MPa (approximately 7 to 13 bar). The ETSVII-250A delivers 55.0 m³/min at 0.7 MPa and 40.0 m³/min at 1.3 MPa.

Q3: Is this compressor suitable for chemical plant environments?
A: Yes. The ETSVII-250A is specifically designed for chemical plant applications, with robust construction for continuous heavy-duty operation. Chemical facilities require reliable compressed air for instrumentation, process control, pneumatic conveying, and reactor systems – all supported by this model.

Q4: What is the outlet connection size?
A: The ETSVII-250A features a DN125 (5") outlet connection. Models up to 75kW use Rp2", while larger models use DN65, DN80, DN100, or DN125 depending on capacity.

Q5: How much floor space is required?
A: The ETSVII-250A measures 3900×2100×2200 mm (L×W×H), with a weight of 6700 kg. Adequate clearance for ventilation and maintenance access should be allowed around the unit.

Q6: What type of cooling does the ETSVII-250A use?
A: The "A" designation in ETSVII-250A indicates air-cooled configuration. Air-cooled models are ideal for sites without access to cooling water or where water quality may cause scaling issues.

Q7: Can the compressor handle fluctuating air demand?
A: Yes, when equipped with optional VFD (variable frequency drive) technology, the compressor can adjust motor speed to match real-time demand, delivering 15–35% additional energy savings in applications with variable consumption.

Q8: What maintenance is required for a two-stage screw compressor?
A: Two-stage compressors generally require similar maintenance to single-stage units – regular oil changes, air filter replacements, and periodic inspection of rotors and bearings. The lower operating temperatures in two-stage designs can extend lubricant and component life, reducing overall maintenance costs.