ZKL Self-cleaning Air Filter for Air Compressor and Gas Turbine Inlet
Introduction:Dust-laden intake air will cause abrasion, fouling and corrosion of air power equipment and shorten service life significantly. The ZKL self-cleaning air filter is a high-performance inlet filtration unit, cooperating with Dust Collector Filter and Air compressor filter to deliver stable clean air for compressors, blowers and gas turbines. It is widely used in steel mills, oxygen stations and chemical plants for large air intake purification.
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Product Introduction
Our ZKL series self-cleaning air filter is optimized for the strict inlet air requirements of air compressors, industrial gas turbines and blast furnace blowers. Matched with Dust Collector Filter, Air compressor filter and other supporting filter elements, it forms a complete air intake purification system. Dust in intake air will wear impellers, break rotor dynamic balance and trigger rust and corrosion of power equipment. This self-cleaning air filter solves these risks effectively, with three automatic cleaning modes: timing, differential pressure and manual. It can run reliably under 100% relative humidity, features large filtration area, low flow resistance and long service life of filter cartridges. Non-standard customization is available for special working conditions.
Working Principle
The filtration process:
Dust-containing air is sucked by the air compressor, passing through the primary coarse filter box first and then the high-efficiency filter cartridge. Dust particles are captured on the cartridge surface through gravity, inertia, diffusion and contact interception. Clean air flows through the sealing ring, venturi tube, clean air chamber and air collecting port, then enters the air compressor.
The self-cleaning process:
When dust accumulates and the pressure difference rises above the set threshold (600 Pa), the PLC controller triggers pulse back-blowing in sequence. The pulse solenoid valve releases compressed air through the blow nozzle to blast dust off one filter cartridge. Other filter cartridges keep working during the cleaning cycle, so the whole system runs continuously without shutdown. The back-blowing duration is only 0.1–0.2 seconds.
Standard Configuration
Primary coarse filter box
High-efficiency filter cartridges
Sealing gaskets
Venturi tubes
Clean air pipe and air collecting port
Negative pressure probe, differential pressure controller and alarm
Pulse solenoid valves and blow nozzles
PLC programmable controller and control instrument
Compressed air pipeline and power supply assembly
Key Advantages
Optional dust collecting box and dust screen at the bottom, water washing design available to avoid secondary pollution.
Three self-cleaning modes: timing, differential pressure and manual control.
Single-cartridge independent back-blowing; other filter cartridges keep working during cleaning.
Stable operation under 100% relative humidity.
Large filtration area, low flow resistance, LCD display for pressure drop monitoring.
Long filter service life, replacement cycle reaches about 2 years under normal environment.
High automation, imported core components, unattended operation supported.
Low back-blow air consumption: 0.1~0.3 m³/min, working pressure 0.4~0.6 MPa.
Light weight, only 1/3 ~ 1/2 of baghouse filters with same air flow rate.
Modular stacked design, no complicated piping, fast and convenient installation.
Custom non-standard design available for special technical requirements.
Application Scope
Air compressor stations for all industries, suitable for small compressors in multiple-units combination and one-to-one matching for large capacity compressors.
Raw air compressors for oxygen generation plants.
Blast furnace blowers in steel plants.
Gas turbines of all capacities.
Long-running diesel engines.
Air supply system for chemical fiber and textile industry.
Central air conditioning systems requiring low dust content.
Auxiliary supporting equipment for chemical liquid pollution prevention.
Technical Parameters
| Item | LFZK 225 | LFZK 300 | LFZK 380 | LFZK 500 | LFZK 625 | LFZK 900 | LFZK 1000 | LFZK 1250 | LFZK 1500 | LFZK 2100 | LFZK 2500 | LFZK 3000 | LFZK 4400 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air flow (m³/min) | 225 | 300 | 380 | 500 | 625 | 910 | 1000 | 1250 | 1500 | 2100 | 2500 | 3000 | 4400 |
| Structure | Single layer | Single layer | Single layer | Single layer | Single layer | Single layer | Single layer | Single layer | Single layer | Single layer | Single layer | Single layer | Single layer |
| Initial pressure loss | ≤150 Pa | ≤150 Pa | ≤150 Pa | ≤150 Pa | ≤150 Pa | ≤150 Pa | ≤150 Pa | ≤150 Pa | ≤150 Pa | ≤150 Pa | ≤150 Pa | ≤150 Pa | ≤150 Pa |
| Filtration efficiency | ≥99.96%@1μm, ≥99.99%@2μm, 100%@3μm | ||||||||||||
| Power | 100W | 100W | 100W | 100W | 100W | 100W | 100W | 100W | 100W | 150W | 150W | 150W | 150W |
| Power supply | AC 220V | ||||||||||||
| Back-blow air consumption | 0.1 m³/min | 0.1 m³/min | 0.1 m³/min | 0.1 m³/min | 0.1 m³/min | 0.1 m³/min | 0.1 m³/min | 0.1 m³/min | 0.1 m³/min | 0.2 m³/min | 0.2 m³/min | 0.2 m³/min | 0.2 m³/min |
| Back-blow pressure | 0.4–0.6 MPa | ||||||||||||
| Weight (t) | 1.6 | 1.9 | 2.0 | 2.4 | 2.8 | 3.2 | 3.7 | 4.2 | 4.7 | 7.0 | 8.5 | 12 | - |
Installation & Maintenance
Install on solid foundation, keep air duct sealing to avoid air leakage.
Check the pressure drop display regularly; replace filter cartridges once the pressure loss exceeds the rated range.
Inspect the pulse solenoid valves and compressed air pipeline periodically to guarantee stable back-blowing performance.
Match with Dust Collector Filter and Air compressor filter as pre-treatment protection, extending the service life of the main filter cartridge.
Follow fan stand ratio 1.8~2.0 or consult our engineers for accurate model selection.
FAQs
Q1: What is the core advantage of self-cleaning air filter compared with bag filters?
A: It is much lighter, occupies less space, supports online automatic back-blowing and does not need shutdown for cleaning.
Q2: Can this filter work continuously for 24 hours?
A: Yes, independent back-blow design ensures other filter cartridges keep filtering during cleaning, suitable for non-stop running equipment such as gas turbines and blast furnace blowers.
Q3: What’s the maximum working humidity?
A: It can operate normally under 100% relative humidity, suitable for humid and dusty industrial sites.
Q4: Can I customize the air flow capacity?
A: Yes, we can produce non-standard LFZK series filters according to the required air intake volume.
Q5: Do we need pre-filter for this self-cleaning air filter?
A: Recommended. Dust Collector Filter and Air compressor filter can protect the main filter cartridge and reduce the dust load.
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