Features of the Screw Compressor

Rotary screw compressor is a positive displacement machine that operates without the need for suction or discharge valve. There is the ability to automatically reduce the suction volume internally while reducing part load power consumption. Screw Compressor Manufacturers In India offer a much wider operating range and lower maintenance costs than conventional rotating compressors. Machines are very small and make less vibration levels than piston machines.

Reduction in Maintenance

Only the moving parts are male and female rotor in a screw compressor. There are no valves, pistons, piston rings or connecting rods that require routine maintenance. With the elimination of piston, rings and valves, annual maintenance costs decrease. Operating the screws for many years without any significant maintenance or repair is not uncommon. When comparing the screw compressors and mutual machines, it is important to consider the cost of maintenance in the overall project cost.

Turn Down

Screw Compressor Manufacturers In India turn on capacities up to 90% of full load with very good part load power requirements. This turn down capacity is within the machine and the external driver is independent of the speed or gas recycle control. This makes the machine an attractive choice for areas where the flow rate and operating conditions are not stable.

Capacity control can be controlled by hand or by automating the exact system's exact demands. The need for discharging external suction pressure control, suction recycle or automatic driver speed control greatly reduces by controlling the flow rate or volume of gas through the machine. These are the most common means of automatic ability control on reciprocal machines because internal capacity control is more complex to do automatically and therefore very rarely is used.

Using an external by-pass valve or suction pressure control valve consumes more power compared to reducing the flow rate of the gas within the machine. The ability to adjust the capacity within the Screw Compressor Manufacturers In India is comparable to the length of the stroke and separation of the suction on a rotating machine. However, the screw may automatically vary the capacity, where the reciprocal machine typically uses the amount of the variable which is manually adjusted, while the machine is shut down and the depressurized. Turn down capability using variable volume pockets is less than using slide valve in the screw compressor.

High Compression Ratio

Screw compressors can work with around 2 to 20 ratios of compression on the same platform while maintaining high volatile efficiency. These capacities are obtained in the machine by injecting large amounts of lubricating oil during the compression process. The oil is usually injected at the estimated rate of 100 HP per 10-20 USGPM in the machine, which makes the page 5 process significantly lower the discharge temperature of the gas. Oil is discharged with process gas and will then be removed from the gas stream.

Reciprocating machines can work under very high pressure compared to screw machines, but usually per-stage compression are limited to approximately 4 percent. Multi-staging and inter-cooling machines are essential to prevent bad volumetric efficiency, rod loading and excessive discharge temperature. In those applications where the system compression ratio is more than four, multi-stage retrofitting machines will provide better adiabatic ability, or power requirements than single-stage Screw Compressor Manufacturers In India. In this case, the user should weigh the power of the compressor to rotate the benefits of the screw machine to save electricity.

Accommodates Wide Operating Range

The screw compressor machine can work on a very wide range, with little or no changes required for the machine. It is very well suited for natural gas industry where flow rates and operating conditions often change. Over time, due to the pressure of reservoir pressure, the compressors face the rod loading or discharge temperature range and require expensive retrofits. It is necessary to change the cylinders, change the cooler sections and re-staging the machine.

Small Package Size

Rotary screws provide high capacity with minimal installation space compared to mutual machines. Based on a full speed design of 3,600 rpm, a large screw machine can provide 80 MMSCFD gas based on 100 psig suction pressure. The physical size of the compressor is very small compared to a comparable mutual machine, which requires many cylinders to move the same amount of gas.

Lower Vibration

With only two major moving parts in a circular motion, the screws make very little vibration levels compared to the reciprocal machines. With less vibration levels, Screw Compressor Manufacturers In India do not require the same type of foundation, which is in the form of rotating machines, which can result in lower installation costs.

In general, Screw Compressor Manufacturers In India are considered to provide a lot of reliability, resulting in less maintenance costs and less time compared to reciprocal machines.