55-900kw Anti-Corrosion Oil-Free Screw Compressor

When upgrading production lines in harsh chemical zones, importing from professional China 55-900kw Anti-Corrosion Oil-Free Screw Compressor suppliers like DECHUAN provides the necessary durability. Every moisture-exposed component is constructed from premium stainless steel or treated with specialized protective coatings to eliminate structural corrosion.

Rust and Chemical Failures in Aggressive Environments

Standard air compressors installed in chemical plants or coastal manufacturing zones quickly suffer from pitted rotors, rusted cooling tubes, and electrical short circuits caused by ambient moisture and corrosive gases. This leads to frequent air leaks, drop-offs in volumetric efficiency, and expensive cooler failures.

The compressor provides robust environmental protection:

• Premium Stainless Steel Tube Bundles: Marine-grade stainless steel resists pitting and chemical stress corrosion cracking over long operating cycles.

• TEFC IP55 Sealed Electricals: Completely blocks dust, salty sea air, and chemical vapors from reaching sensitive motor windings or electrical connections.

• Advanced Inert Rotor Coating: A high-bonding protective layer prevents rotor oxidation, keeping the compression chamber clean and maintaining precise tolerances.

Material Science & Corrosive Environment Engineering

Industrial air systems operating in chemical processing zones or coastal facilities face constant exposure to airborne acids, salt spray, and corrosive moisture. A standard air unit will quickly suffer from rust and pitting, leading to air leaks and rotor lockups. This specialized 55-900kw Anti-Corrosion Oil-Free Screw Compressor is built to endure:

• Full Stainless Steel Coolers & Separation Units: All internal heat exchangers and labyrinth water separators are built from high-grade stainless steel, completely eliminating rust flake contamination.

• Advanced Rotor Layer Protection: The dual screw rotors feature a proprietary molecularly-bonded coating that resists chemical breakdown from ambient industrial gases.

• Sealed IP55 Electrical Cabinet: The entire control enclosure and variable frequency drive are fully sealed against acidic gases and salty maritime air, protecting critical electronics.

Key Technical Specifications

• Corrosion Resistance Level: Marine and heavy industrial chemical grade

• Power Range Selection: 55kW to 900kW heavy-duty designs

• Air Volume Delivery: 4.2 to 148.5 m³/min continuous output

• Cooler Construction: Robotic-welded stainless steel with expanded star-fin surface areas

ZR/ZT 55-90 (FF) STD

ZR/ZT 75-90 VSD (FF) STD

Performance reference conditions for the unit were measured according to Annex C, 4th edition (2009) of ISO 1217:

· Relative humidity: 0%

· Absolute inlet pressure: 1 bar

· Inlet temperature: 20°C Discharge rate (FAD) was measured at the following operating pressures:

Constant speed type:

·  -7.5 bar type: 7 bar

· -8.6 bar type: 7 bar

· -10 bar type: 9 bar

VSD type:

· -8.6 bar type: 7 bar

· -10.4 bar type: 9 bar

· (2) Class A weighted emission sound pressure level of the workstation (LpWSAd). Measured according to ISO 2151:2004 (using 150 9614/2 sound intensity scanning method). The newly added correction factor is a completely uncertain value (KpAd), conforming to the test code.

· (3) Weight is for reference only; the actual weight supplied shall prevail.

ZR/ZT 110-160 (FF) STD

ZR/ZT 110-160 VSD (FF) STD

According to ISO 1217 Annex C, 4th Edition (2009), the unit performance reference conditions are as follows:

· Relative humidity: 0%

· Absolute inlet pressure: 1 bar

· Inlet temperature: 20°C

Displacement FAD is measured at the following operating pressures:

Constant speed models:

-7.5 bar models: 7 bar

-8.6 bar models: 7 bar

-10 bar models: 9 bar

VSD models:

-8.6 bar models: 7 bar

-10.4 bar models: 9 bar

(2) Class A weighted emission sound pressure level of the workstation (LpWSAd). Measured according to ISO 2151:2004 (ISO 9614/2 sound intensity scanning method). The newly added correction factor KpAd is uncertain, complying with test code.

(3) V1=380V, V2=400V.

(4) Weight is for reference only; actual weight shall prevail.

ZR/ZT 200-275 (FF)

 ZR/ZT 250-315 VSD (FF)

-Relativehumidity:0%

-Absolute inlet pressure: 1bar

-Inlet temperature:20°℃

Discharge rate (FAD) was measured at the following operating pressures

Constant speed type:

-7.5 bar type: 7 bar

-8.6 bar type: 7 bar

-10 bar type: 9 bar

VSDtype:

-8.6 bar type: 7 bar

-10.4 bar type: 9 bar

(2) Class A weighted emission sound pressure level of the workstation (LpWSAd).

Measured according to ISO 2151:2004(using 150 9614/2(sound intensity scanning method).

The newly added correction factor is a completely uncertain value (KpAd), conforming to the test code.

(3) Weight is for reference only; the actual weight supplied shall prevail.

ZR 300-750

ZR 355-900VSD

Performance reference conditions for the unit were measured according to Annex C, 4th edition (2009) of ISO 1217:

· Relative humidity: 0%

· Absolute inlet pressure: 1 bar

· Inlet temperature: 20°C Discharge rate (FAD) was measured at the following operating pressures:

Constant speed type:

·  -7.5 bar type: 7 bar

· -8.6 bar type: 7 bar

· -10 bar type: 9 bar

VSD type:

· -8.6 bar type: 7 bar

· -10.4 bar type: 9 bar

· (2) Class A weighted emission sound pressure level of the workstation (LpWSAd). Measured according to ISO 2151:2004 (using 150 9614/2 sound intensity scanning method). The newly added correction factor is a completely uncertain value (KpAd), conforming to the test code.

· (3) Weight is for reference only; the actual weight supplied shall prevail.

ZR 200X-400X

ZR/ZT 75-160 VSD+ FF

Performance reference conditions for the unit were measured according to Annex C, 4th edition (2009) of ISO 1217:

· Relative humidity: 0%

· Absolute inlet pressure: 1 bar

· Inlet temperature: 20°C Discharge rate (FAD) was measured at the following operating pressures:

Constant speed type:

·  -7.5 bar type: 7 bar

· -8.6 bar type: 7 bar

· -10 bar type: 9 bar

VSD type:

· -8.6 bar type: 7 bar

· -10.4 bar type: 9 bar

· (2) Class A weighted emission sound pressure level of the workstation (LpWSAd). Measured according to ISO 2151:2004 (using 150 9614/2 sound intensity scanning method). The newly added correction factor is a completely uncertain value (KpAd), conforming to the test code.

· (3) Weight is for reference only; the actual weight supplied shall prevail.

International Shipping & Protective Packaging Flow

• Marine-Grade Desiccant Placement: High-capacity moisture-absorbing packs are placed inside the core chassis to prevent condensation during ocean transit.

• Vapor Corrosion Inhibitor (VCI) Shrink Wrap: The entire 55-900kw Anti-Corrosion Oil-Free Screw Compressor is tightly wrapped in specialized VCI protective film to block salty sea air.

• Fumigated Wooden Crate Reinforcement: Bolted onto thick steel skids and encased in fully enclosed wooden crates to ensure damage-free delivery.

Industrial Durability FAQ

Q: Can the compressor handle outdoor installations near coastal regions?

A: Yes. The combination of the heavy-duty weatherized enclosure, IP55-rated electrical systems, and stainless steel internals allows the unit to operate reliably in exposed, high-humidity coastal settings.

Q: How does the labyrinth-designed water separator resist corrosion over time?

A: The entire moisture separator body is manufactured from heavy-gauge stainless steel. It features no moving parts or delicate internal meshes that can clog or corrode when exposed to acidic atmospheric condensates.

Q: How does the rotor coating protect against acidic air drawn through the intake?

A: Our advanced coating is applied via high-temperature molecular bonding, creating a non-porous chemical barrier. Acidic vapors drawn into the 55-900kw Anti-Corrosion Oil-Free Screw Compressor slip past the smooth surfaces without bonding or degrading the underlying metal.