Over the last sixty years, Kaishan has steadily grown to become a signi?cant and diversi?ed engineering company developing high value machinery for industries worldwide. With modern, specialized manufacturing facilities positioned in seven strategic locations, Kaishan’s group of thirty-two subsidiary companies produce over 1,00,000 rotary screw and 2,50,000 reciprocating compressors annually. Kaishan is the world’s third largest manufacturer of Compressed air equipment, mining and drilling equipment and supports industries in more than 60 countries including USA, Australia, Germany, Japan, Korea, Russia, Africa and throughout Latin America.

Kaishan’s global strategy of combining highly skilled engineering with highly efficient manufacturing allows us to provide performance proven and reliable equipment at a signi?cant cost savings to our customers. Additionally, Kaishan’s manufacturing processes are 85% vertically integrated ensuring full control of the material supply chain. This approach enables to supply high quality components at a lower cost and maintain agility to respond rapidly to changing market demands.

Integral to the design and manufacture of our products is outstanding energy efficiency. Kaishan’s fundamental belief in environmental sustainability drives us to produce products that maximize energy efficiency and help to preserve precious energy resources. Single and two-stage compressors that produce more compressed air per unit of power input as well as expanders that utilize waste heat to produce electricity are just two of the fundamental products in our sustainable approach.

Throughout our manufacturing processes, unused waste materials are recycled at every stage to maximize the use of raw materials. This approach translates to lower initial costs and lower operating costs for our customers and a smaller environmental footprint that helps us all. Kaishan’s committment to environmental responsibility ensures that we will continue to develop technologies and manufacturing solutions that provide industry with "Good and Green" products of exceptional value - now and well into the future.

Compressed Air is the Fourth Largest Utility for an Industry after Electricity, Gas and Water. Very few people understand the cost associated with compressed air production. Compressed air is the most expensive form of energy used in an industry.

Consider a compressor of 500 cfm and 100 psi (g). This will use a 100 HP / 75 kW motor. Running for 24 hrs a day, 365 days a year, with a 70% load factor, it would consume approximately 600000 units annually. At Rs 7 per kWh, it would cost 42 lakhs a year. That is 3-4 times the cost of the compressor itself.

a) Large rotor size

b) Lower inter-lobe leakage losses

Pressure differences between two neighbouring working chambers is small due to a greater number of lobes. This reduces inter-lobe leakage losses. Hence leakage to delivery ratio decreases as the number of rotor lobes increases.

c) Large wrap angle & discharge port

A greater number of lobes combined with a larger wrap angle ensures multiple rotor contact. This reduces vibrations and thus minimizes noise. Larger discharge ports decrease the discharge velocity and therefore reduce the discharge pressure losses, thereby increasing the compressor’s overall efficiency.

The new range of PMV compressors integrate the highest quality and most effective components into a compact unit to provide maximum output with minimum energy usage. These highly advanced air compressors provide world class efficiency and performance and yet they are heavy duty units developed to ensure superior durability and reliability. Precision engineering utilising latest technologies has achieved energy standards exceeding international expectations.  

Developed by Kaishan Engineers, these revolutionary rotary screw air compressors bring together an integrated systematic optimisation of the compressor unit; an advanced permanent-magnet motor and Kaishan SKY technology to achieve outstanding energy efficiency. This unique integrated combination, all the way down to 15 kW, is a game changer in compressed air industry offering unsurpassed efficiency.  

Rare earth material technology gives higher possible rotating speeds, wider operating parameters and increased energy efficiency to the permanent-magnet synchronised motors. Within their wide operating speed range the Permanent Magnet Variable Frequency rotary screw air compressors are able to maintain extremely high motor efficiency compared to those using conventional drive motors.

Kaishans Permanent Magnet Variable Frequency Rotary Screw Air Compressors operate at peak efficiency even with 80% reduction in air output. It also offers far greater integrated control precision through an advanced PID control algorithm that helps generate highly stable supply pressure.

The fully enclosed oil-cooled Permanent Magnet motor generates very little heat, resulting in longer life. No cooling fan means significantly lower noise and less fan drag compared to conventional motors. The motor is heat resistant upto 18 C and cannot be magnetised. With no external electrical excitation, the motor maintains a power factor close to unity. The precision speed adjustment capability (1/30,000) greatly reduces Ordinary mains frequency screw compressor discharge fluctuations of these new age air compressors.

Motor angular position sensors are not required, simplifying the system and improving both stability and reliability. Torque can be compensated at any angle within 360° to achieve perfect torque control and the utilisation of bus voltage is greater than 93%, which is much greater than conventional inverters.

• Complete control of air output to meet operating demand.
• Lower energy input for required air generation.
• Excessive part load energy consumption is significantly reduced.
• Gradual increase in motor speed eliminates starting spikes and cost penalties.
• A steady system pressure is maintained, lowering system stress and overall air demand. Reduced artificial demand due to lower operating pressures.
• Reduced maintenance time and cost.
• Significantly lower noise levels