15KW 20 HP 80 CFM Rotary Screw Air Compressor For Sale

This 20 hp screw compressor is twin screw type. The power is 15KW. And air flow of 15 kw air compressor is 80 cfm @7bar. The available air pressure is 6 bar, 7 bar, 8bar, 10 bar, 12 bar, 13 bar and 16 bar. The type is a stationary compressor. Performance is low noise. 20 hp rotary screw air compressor has many applications. For example, we usually use it for pneumatic tools, textile, sandblasting and spray painting, etc.

Kind note: we also customize 20 hp screw air compressor with other voltages, such as 220V/240V/415V/440V/460V and 60HZ.

(1) The energy-saving effect of permanent magnet VSD air compressor is obvious

Compared with the power frequency air compressor, it can generally save energy by 10%~35%. Of course, how much energy saving depends on two aspects. That is, the working conditions and the setting of the parameters of inverter. The biggest factor is the working condition of industrial air compressor. When the customer’s actual air consumption fluctuates greatly, then the energy saving effect will be better. The direct data is the ratio of the no-load time to the total working time.

(2) The maintenance cost of screw air compressor with vfd is lower

The soft start of the air compressor reduces electrical shock to the motor components. The starting current is small. Therefore, it extends the lifetime of the motor. At the same time, it also reduces the mechanical impact on the equipment. Correspondingly, it improves the service life of motor bearings, main engine bearings and gearboxes.

In addition, the energy-saving controller keeps the air compressor in a loading state most time. It reduces the action number of both solenoid valves and pneumatic components. Therefore, the failure rate without these accessories become lower. Moreover, the reverse filtration time of the inlet filter is greatly reduced. It extends the filter lifetime of 20 hp screw compressor.

(3) PM VSD air compressor also reduces noise

When the exhaust air volume decreases, the speed of compressor motor slows down. So the noise is much less than when running at full speed. The unloading run time becomes less. Venting noise is also reduced.

(4) Exhaust air volume adjustment range is wider

Permanent magnet motors can maintain extremely high motor efficiency at low speeds. At the same time, it allows the max speed to exceed the upper limit of the rated speed. Therefore, the adjustment range of exhaust volume can reach 15%-115% of the rated flow. So the application of 15 kw air compressor will be more flexible.

(5) Higher transmission efficiency

Belt drive efficiency is typically 0.94 – 0.96. Our 7.5 hp 5.5 kw screw compressor is belt drive type. In addition, the direct drive efficiency is above 0.99. This 20 hp rotary screw air compressor is direct drive type. And the permanent magnet motor does not have any mechanical friction loss and transmission loss. The transmission efficiency is 1.

Regular maintenance can effectively reduce or avoid failures. So it can reduce the maintenance cost of 15 kw air compressor. At the same time, it can avoid affecting the product quality. If the oil content in the exhaust air is unqualified, it will cause products to be scrapped. In addition, it is also good for energy saving and consumption reduction. Bad operation of industrial air compressor often increases friction and energy consumption. Eventually, it will affect the energy-saving effect of the screw air compressor.

(1) Air compressor air filter maintenance

It can filter out dust and other dirt in the air. The best time for maintenance is once a week. The specific method is as follows: Firstly, take out the air filter of 20 hp screw compressor. Then use a certain amount of compressed air to blow the inside out. Clean up the dirt on the surface of the part. Finally, wipe it clean with a clean cloth.

(2) Industrial air compressor oil filter maintenance

For new 15 kw air compressor, replace oil filter after use more than 500 hours. After that, we can change it every 2000 hours or so.

(3) Compressed air oil separator maintenance

The best replacement time is around 3,000 hours. But in the case of relatively bad conditions, it is necessary to shorten the replacement time. At the same time, we need to take the oil separator out in due course for cleaning.

(4) Screw compressor lubrication oil maintenance

The quality of lubricating oil directly determines the performance of the oil-injected screw compressor. Good oil can make the machine run normally and efficiently. And for new industrial compressor, it is best to replace the oil after 500 hours of use. After that, we can replace it after every 2,000 hours.

(5) 20 HP rotary screw air compressor air cooler maintenance

The cooler can cool down and dissipate heat. After long use, the 15 kw air compressor will become hot. If there is a problem with the cooler, the screw compressor will collapse. In addition, the air cooler has a special structure. This makes it prone to dust accumulation. So it is necessary to regularly clean the dust.

Q1: How many CFM is a 20 hp screw air compressor?

A1: Different pressures, different air flows. If the pressure is 8 bar, the air flow of 15 kw air compressor is 2.2m³/min. That is, the air flow is 77 cfm. And if the pressure is 7 bar, the air flow is 2.5m³/min (≈80 cfm).

Q2: What’s the average lifespan of a rotary screw air compressor?

A2: Under normal circumstances, it is no problem to use it for 10 years. Of course we have to do a good job of daily maintenance.

Q3: What’s the delivery time of your 20 hp rotary screw air compressor?

A3: Different voltages and configurations, different delivery time. If 380V/50HZ 15 kw air compressor, our delivery time is 15~20 days. But if special custom screw compressor, the delivery time is about 35~40 days. For example, many customers need 220V/415V/440V/460V and 60HZ air compressor. The lead time is be longer than 380V/50HZ screw compressor.