Air compressor installation rules


The selection of the installation site is most ignored by the staff. Often after the compressor is purchased, it is randomly located and used immediately after piping. There is no prior planning at all. Little did they know that such a sloppy result would cause future compressor failure and maintenance difficulties and poor compressed air quality. Therefore, choosing a good installation location is a prerequisite for the correct use of air compressor systems.

   1. A wide and well-lit place is required to facilitate operation and maintenance.

   2. The relative humidity of the air should be low, less dust, clean and well ventilated.

  3. The ambient temperature must be lower than 40℃, because the higher the ambient temperature, the less the compressor output air volume.

   4. If the factory environment is poor and dusty, pre-filtering equipment must be installed.

   5. Access is reserved, and cranes can be installed if the conditions are met to facilitate maintenance.

   6. Reserve space for maintenance, and there must be at least 70 cm between the compressor and the wall.

   7. The compressor is at least one meter away from the headspace.

   2. Precautions for piping, foundation and cooling system

  1. Precautions for piping of air pipe

   (1) When piping the main pipeline, the pipeline must have an inclination of 1°~2° to facilitate the drainage of condensate in the pipeline.

   (2) The pressure drop of the piping should not exceed 5% of the compressor set pressure, so it is better to choose a larger pipe diameter when piping.

   (3) The branch pipeline must be connected from the top of the main pipeline to prevent the condensed water in the pipeline from flowing into the air-consuming equipment. The compressor air outlet pipeline should have a check valve.

   (4) If several compressors are installed in series, a ball valve or automatic drain valve must be installed at the end of the main line to facilitate the discharge of condensate.

   (5) The main pipe should not be arbitrarily reduced. If the pipe must be reduced or enlarged, a reducer must be used. Otherwise, mixed flow will occur at the joint, resulting in a large pressure loss and also affecting the service life of the pipe.

   (6) If there are purification buffer facilities such as air storage tank and dryer after the compressor, the ideal piping should be compressor + air storage tank + front filter + dryer + rear filter + fine filter. In this way, the gas storage tank can filter part of the condensed water, and the gas storage tank also has the function of reducing the gas exhaust temperature. The air with lower temperature and less water content enters the dryer again, which can reduce the load on the dryer or filter.

(7) If the air consumption of the system is very large and the time is short, and the instantaneous air consumption changes greatly, it is advisable to install an air storage tank as a buffer (its capacity should be greater than or equal to 20% of the maximum instantaneous air volume). Reducing the number of frequent loading or unloading of the compressor unit, and reducing the number of actions of the control element, is of great benefit to maintaining the operating reliability of the compressor. Under normal circumstances, a gas tank with a capacity of 20% of the displacement can be selected.

   (8) For compressed air with a system pressure below 1.5MPa, the flow velocity in the delivery pipe must be below 15m/sec to avoid excessive pressure drop.

   (9) Minimize the use of elbows and various valves in the pipeline to reduce pressure loss.

   (10) The ideal piping is that the main line surrounds the entire plant, so that compressed air can be obtained from both sides at any position. For example, when the gas consumption of a branch line suddenly increases, the pressure drop can be reduced. In addition, appropriate valves are arranged on the ring-shaped trunk line for maintenance and shut-off.

   2. Basics

   (1) The foundation should be built on a hard floor, and the foundation must be leveled before installation to avoid vibration and noise caused by the compressor.

   (2) If the compressor is installed upstairs, it must be equipped with anti-vibration treatment to prevent vibration from being transmitted downstairs or resonance, which poses a safety hazard to the compressor and the building itself.

   (3) The vibration generated by the screw compressor is very small, so no fixed foundation is required. However, the ground on which it is placed must be flat, and the underground cannot be soft soil. The bottom of the compressor is best covered with soft cushions or shock-proof cushions to prevent vibration and noise.

  3. Cooling system

   (1) When you choose an air-cooled compressor, consider its ventilation environment. Do not place the compressor near high-temperature equipment to prevent the compressor from inhaling high-temperature atmosphere and causing the exhaust temperature to become too high, which may affect the normal operation of the unit.

(2) When the use conditions restrict the compressor to be installed in a small confined space, extraction and exhaust equipment must be installed to facilitate air circulation, and the capacity of the exhaust and exhaust equipment must be greater than that of the compressor cooling fan The position of the suction inlet should be suitable for the hot exhaust outlet of the compressor.