Installing a screw air compressor is not just about placing the machine and turning it on — proper installation directly impacts performance, efficiency, and service life. To achieve safe, stable, and energy-efficient operation, three key factors must be considered: environment & foundation, piping & system design, and commissioning & protection.

1. Environment & Foundation

Proper site selection determines the lifespan of your compressor. An ideal compressor room must be dry, well-ventilated, and dust-free.

• Space layout
  Maintain at least 1.5m clearance between the compressor and walls, and 2m between multiple units. A ceiling clearance of ≥4m ensures smooth airflow for cooling.

  • If the ambient temperature exceeds 40℃, install industrial exhaust fans or air conditioning.

  • If the temperature drops below 0℃, use electric heating to prevent pipeline freezing.

• Contamination control
  Keep the compressor away from dusty workshops or pickling areas. The air inlet should be raised 2m above the roof and equipped with a triple-stage pre-filter (coarse filter precision ≤50μm). In chemical environments, use stainless steel piping for corrosion resistance.

• Foundation requirements
  A reinforced concrete base should withstand 2× the maximum loaded weight of the compressor, with a leveling tolerance of ≤2mm/m.

  • Screw compressors should be mounted on anti-vibration rubber pads (≥10mm thick).

  • Reciprocating compressors require spring shock absorbers, secured with foundation bolts (e.g., M16 bolts tightened to 80–100 N·m).

• Vibration control
  After installation, use a 0.02mm/m precision level gauge to check horizontal alignment. Longitudinal and transverse deviation should not exceed 0.5mm/m, and elevation differences between multiple units should be within ±3mm to avoid pipeline stress.

2. Piping & System Design

The layout of the piping system directly affects air pressure stability and energy efficiency.

• Air intake piping
  Keep it short, straight, and smooth. The pipe diameter should be larger than the compressor inlet (e.g., for DN50, use DN65). Minimize bends (prefer 45° elbows) and maintain a pressure drop of ≤0.01 MPa.

• Air discharge piping
  Slope towards the air receiver at a ratio of 1:100 to prevent condensate backflow.

  • Flange joints: use high-pressure rubber-asbestos gaskets (≥1.6 MPa).

  • Threaded joints: wrap with PTFE tape (3–5 clockwise turns).

• Post-treatment equipment sequence (must not be changed):
  Air compressor → Aftercooler → Moisture separator → Air receiver → Dryer → Precision filter.
  Maintain ≥1.2m spacing between equipment. The dryer should be installed horizontally, while precision filters must be vertical with the arrow aligned to airflow. The drain port must be higher than downstream piping.

• Electrical safety

  • Power supply fluctuation: ≤±10%.

  • Cable selection: rated current ×1.5 (e.g., 75kW motor requires 35mm² copper cable).

  • Grounding: adopt TN-S system, resistance ≤4Ω. Do not share with lightning protection grounding.

  • Control cables: shielded and routed separately from power cables (≥300mm apart). Sensors must be installed away from vibration sources (e.g., pressure sensors mounted ≥10m away on a stable pipe section).

3. Commissioning & Protection

Before startup, check the following five items:

1. Lubricating oil level: between ½–⅔ of the sight glass.

2. Belt tension: slack of 10–15mm.

3. Remove all pipeline blind plates, plugs, and desiccant bags.

4. Confirm cooling water valve status (for water-cooled units).

5. Ensure high-temperature parts (>80℃) are fitted with protective covers.

6. Install safety devices on the air receiver:

   • Safety valve (set at 1.1× working pressure)

   • Pressure gauge (accuracy: grade 1.6).

Trial operation:

• Run unloaded to confirm motor rotation.

• After 30 minutes, check vibration levels:

  • Screw compressor ≤6.3mm/s

  • Reciprocating compressor ≤11.2mm/s

• Under load, verify:

  • Discharge temperature: ≤100℃ (oil-injected screw)

  • Pressure fluctuation: ≤±0.02 MPa

  • Pipeline leaks: check with soap water.

Mandatory safety requirements:

• Protective fence ≥1.2m around the compressor.

• Rotating parts must have protective covers (mesh ≤50×50mm).

• Emergency stop button must be red mushroom-head type, mounted at 1.5–1.8m height, connected to an independent hardwired circuit.

Why Choose Chanun Screw Air Compressors?

Proper installation ensures performance, but the foundation of reliability comes from choosing the right equipment. At Chanun, our screw air compressors are engineered with:

• Robust design to handle demanding industrial conditions.

• Energy-saving VSD and permanent magnet motor technology.

• Advanced safety and monitoring systems.

Whether you need a new system or want to optimize an existing one, Chanun provides complete solutions — from installation guidance to after-sales service — ensuring stable, safe, and efficient compressed air for your production.