The ZIQI GBTB Series Centrifugal Air Compressor represents the pinnacle of oil-free compressed air technology. Unlike rotary screw compressors, centrifugal compressors use high-speed rotating impellers to accelerate gas through a diffuser, converting kinetic energy into pressure. The air system and oil lubrication system are completely independent — fundamentally guaranteeing 100% oil-free compressed air output.
ZIQI's centrifugal range features aviation-grade TC4 Titanium Alloy impellers with 3D backward-curved design, integrally milled for maximum aerodynamic performance. Combined with an AGMA 13 aviation-grade gear set, five-petal tilting pad bearings, and non-contact labyrinth seals, the GBTB delivers industry-leading efficiency with a design life exceeding 20 years.
The full ZIQI centrifugal compressor and fan range passed TÜV oil-free certification in March 2017. The GBTB series is the trusted choice for textile, pharmaceutical, food & beverage, glass, electronics, petrochemical, air separation, PET blow molding, and biological fermentation applications requiring absolutely oil-free compressed air.
The two pillars of ZIQI centrifugal performance
Every detail engineered for reliability and efficiency
Horizontally split design for easy disassembly and maintenance. Made of high-performance nodular cast iron with anti-corrosion surface treatment for long service life.
American Gear Manufacturers Association aviation-grade standard. High-precision manufacturing ensures perfect gear meshing, full interchangeability, and minimal mechanical loss.
Five-petal tilting pad design with detachable pads ensures smooth rotor operation under varying loads and temperatures. Easy maintenance, reduced service costs.
Electric IGV precisely adjusts intake angle for optimized airflow. Saves up to 9% energy at partial loads. No external air source needed — fully electric control.
Water-in-tube, gas-in-shell design with surface coating treatment. Removable core for easy cleaning, corrosion-resistant, handles complex working conditions.
Maintenance-free, all-steel double diaphragm coupling. No backlash, no lubrication needed. High temperature resistance, strong deviation compensation, lightweight.
Transmits axial thrust directly from pinion to bull gear, greatly reducing meshing forces. Increases gear life, reduces mechanical loss, enhances overall drivetrain efficiency.
Advanced PLC with touch screen interface. Features anti-surge protection, constant pressure control, remote monitoring, and comprehensive alarm management.
SUS304 stainless steel oil pipelines (one-piece, no welds). Main + auxiliary oil pumps with redundant protection. Oil mist system prevents oxidation. High-strength carbon steel oil tank.
Tell us your flow rate, pressure, and industry — our engineers will recommend the optimal GBTB model.
Request Quote → WhatsApp UsZIQI GBTB centrifugal vs oil-free screw compressors
| Feature | ZIQI GBTB Centrifugal | Oil-Free Screw Compressor |
|---|---|---|
| Oil-Free Method | Air & oil systems fully independent | PTFE coating or water lubrication |
| Max Flow Rate | Up to 350 m³/min | Typically ≤ 80 m³/min |
| Design Life | 20+ Years | 10–15 Years |
| Moving Parts | Fewer — lower failure rate | More rotors, bearings, seals |
| Maintenance | No oil changes in air path | Regular element replacement |
| Partial Load Efficiency | IGV saves up to 9% energy | VSD or load/unload |
| Certification | TÜV Oil-Free + ISO Class 0 | ISO Class 0 (varies by brand) |
| Heat Recovery | Available — process water heating | Limited |
Complete GBTB centrifugal compressor range from the selection manual
| Model | Pressure (bar) | Flow Rate (m³/min) | Motor Power (kW) | Dimensions L×W×H (mm) | Weight (kg) |
|---|---|---|---|---|---|
| GBTB-120A | 4.0 – 9.0 | 20 – 43 | 110 – 240 | 3000 × 1850 × 2450 | 4,000 |
| GBTB-140A | 1.5 – 4.0 | 40 – 85 | 140 – 280 | 2800 × 1800 × 1800 | 4,200 |
| GBTB-250A | 4.0 – 9.0 | 45 – 90 | 250 – 500 | 3100 × 2000 × 2450 | 6,500 |
| GBTB-220A | 2.0 – 12.0 | 40 – 98 | 220 – 500 | 3300 × 2000 × 2450 | 8,500 |
| GBTB-300A | 2.0 – 25.0 | 80 – 210 | 300 – 1,200 | 4300 × 2100 × 2700 | 10,000 |
| GBTB-1050A | 2.0 – 25.0 | 220 – 350 | 1,050 – 2,000 | 4500 × 2250 × 2770 | 16,500 |
| Model | Pressure (MPaG) | Flow (m³/h) | Motor Power (kW) | Dimensions L×W×H (mm) | Weight (kg) |
|---|---|---|---|---|---|
| GBTB-15000A | 0.3 – 1.6 | 12,000 – 120,000 | ≤ 15,000 | 7000–12000 × 4000–5100 × 4500–5000 | 46,000 – 63,000 |
| Model | Inlet Pressure (MPaG) | Exhaust Pressure (MPaG) | Flow (m³/min) | Motor Power (kW) | Dimensions L×W×H (mm) | Weight (kg) |
|---|---|---|---|---|---|---|
| GBTBH-7500A | 0.3 – 1.0 | 1.6 – 5.0 | 12,000 – 73,200 | ≤ 7,500 | 6000–10000 × 4500–6000 × 3000–4500 | 28,000 – 60,000 |
* Standard Design Life: > 20 Years. Customized voltage, frequency, and gas media available upon request. Specifications may vary depending on operating conditions.
Our centrifugal compressor engineers provide free technical selection support. Custom configurations available for special pressures, gases, and site conditions.
Get Free Technical Consultation →Trusted across industries requiring absolute oil-free compressed air
| Model | Pressure Range (bar) |
Flow Range (m³/min) |
Motor Power (kW) |
Weight (kg) |
Dimensions (mm) (L × W × H) |
|---|---|---|---|---|---|
| GBTB-120A | 4 - 9 | 20 - 43 | 110 - 240 | 4000 | 3000 × 1850 × 2450 |
| GBTB-140A | 1.5 - 4 | 40 - 85 | 140 - 280 | 4200 | 2800 × 1800 × 1800 |
| GBTB-250A | 4 - 9 | 45 - 90 | 250 - 500 | 6500 | 3100 × 2000 × 2450 |
| GBTB-220A | 2 - 12 | 40 - 98 | 220 - 500 | 8500 | 3300 × 2000 × 2450 |
| GBTB-300A | 2 - 25 | 80 - 210 | 300 - 1200 | 10000 | 4300 × 2100 × 2700 |
| GBTB-1050A | 2 - 25 | 220 - 350 | 1050 - 2000 | 16500 | 4500 × 2250 × 2770 |
* Note: Custom configurations available for specific industrial requirements.
