11kw screw compressor is a kind of small air compressors. And this 15 hp rotary screw air compressor is fixed speed type. Of course, if you want the variable speed type, we also produce it. Our 15 hp industrial compressor has reliable quality. The hanbell airend warranty time is two years. Besides, the air output is stable. 11kw air compressor has many applications. For example, we usually use it for auto repairing, sandblasting, spray painting, etc.

The air flow of a 15 HP air compressor is 58 cfm @7bar. So if want the 50 cfm screw compressor, you can choose this one. In addition, this industrial air compressor is without dryer. And if 15 hp rotary screw air compressor with dryer, pls visit this product.

(1) The leading efficient screw airend

This 11kw screw compressor uses the Hanbell screw airend. It has high efficiency and low speed. The rotors adopt the third generation tooth shape. So it has the advantages of low noise, energy saving, stability and high reliability.

(2) Reliable and efficient motor

This 15 hp rotary screw air compressor uses a low speed special motor. It has high stability. There is approximately 5% efficiency improvement over comparable products. The motor does not require current excitation. Moreover, the motor has a temperature protection function. The permissible overload current is high. Protection class is IP54. So effectively protects the motor. Increases its service life.

(3) The 11kw screw compressor is with intelligent control system

The air compressor is with an intelligent microcomputer control system. Guaranteed fully automatic intelligent operation. It can monitor the exhaust pressure, temperature and other field data. So, the operator can adjust the 15 hp industrial compressor quickly and easily.

(4) Reliable heat dissipation and cooling system

Our 15 hp rotary screw air compressor uses a low-speed fan. Long life span. And it uses large fan surface design. Effectively enhances the cooling effect of the fan. The cooler and fan can be disassembled independently. And there is a 20% cooling margin.

(5) Our 11kw screw compressor uses high quality filters

The air filter has a high capacity for dust and dirt. The flow resistance is low. It can filter out tiny particles in the compressed air. Dust removal effect can reach 99.5%.

Oil filter uses high density filter media. The surface is treated with nano-plating. Besides, the pore size of filter element is uniform. It has low resistance and high interception capacity. Filtration precision is also high. So it can effectively remove impurities in the lubricating oil.

In addition, the separator core adopts an advanced three-stage oil-air separation design. The oil content is kept below 3ppm. Thus ensure high quality compressed air output.

This 11kw 15 hp rotary screw air compressor is fixed speed type. What’s the its difference with PM VSD screw air compressor? Must a variable frequency air compressor be more energy efficient than an power frequency air compressor?

(1) Their working principles are different

The former uses a star-delta method to start at 5-8 times the rated current. It has high impact on the grid. Tends to cause grid instability.

The latter start by means of a PID regulator inside the frequency inverter. So it can start smoothly.

(2) The VSD air compressor is usually more energy-saving

The former has a higher no-load rate. Because of idling, it wastes more energy. Besides, it takes longer to stop. But VSD air compressors can eliminate idling. It can increase efficiency by an average of 10%. So it can avoid no-load energy waste.

In actual production, our air requirements are constantly changing. For fixed speed air compressor, it only meet this change by frequent loading /unloading. If the customer requires a pressure of 6 bar, the compressor will be set to load at 6.5 bar. At 7.5 bar, it will unload. So it will run continuously between 6.5 and 7.5 bar. The average pressure is 7 bar. That is, it’s 1 bar over. Therefore naturally results in more energy waste.

But for VSD air compressor, it does not need set the loading and unloading pressures. And it can stabilize the pressure within ±0.1 bar. This means that the pressure is basically stable at 6.5 bar. Or even lower. So it significantly reduces the operating pressure of the system. Finally realizes lower energy consumption.

(3) At full load, fixed speed type is more energy efficient than VSD type air compressor

There are limits to the specific power of a screw air compressor’s first-class energy efficiency standard. For example, 22kw/7bar screw compressor: Power frequency air compressor is 6.5. And VSD air compressor is 6.9,. There is 6.15% difference between the two. For 11kw 15 hp/7bar rotary screw air compressor: Fixed speed air compressor is 6.8. And variable speed air compressor is 7.5. There is 10.29% difference between the two.

We measure the specific power values. For the former,calculate it at 100% of the full load. And for latter, calculate it at 100%, 70% and 40% of the full load. In addition, the weighting factors are 25%, 50% and 25% respectively.

Assume that the air compressor is operating at full load. The latter compressor also has to bear the power consumption of the inverter (5-8%). The former airend can choose 100% of the load as the optimum number of revolutions. But the VSD airend is different. For the sake of the load 70% weighting factor, it is possible to choose 70% of the load. Therefore, if run at full load, the former is more energy efficient than the latter.

Q1: How many CFM is a 11KW 15 HP rotary screw air compressor?

A1: If 15 hp industrial compressor pressure is 7bar, the air flow is 58 cfm. If pressure is 8bar, the air flow is about 52 cfm. And air capacity is 45 cfm at 10bar. The air flow is 38 cfm @12bar.