7.5 KW 10 HP 3 Phase Twin Rotary Screw Air Compressor

Our twin screw air compressor uses good spare parts. Firstly, the airend is the most famous China brand ~ Hanbell. The bearings are also SKF brand. The airend has two years warranty time. Secondly, the three air compressor filters also have high quality. The lubricant oil is Shell brand. In addition, it uses a special low-speed motor for air compressors. The efficiency is higher than similar products. It can ensure trouble-free operation.

Because of its simple structure and quality parts, it has excellent stability. A double screw air compressor is not prone to failure. Air production is sufficient. The capacity of a 10 hp 3 phase screw air compressor is 1.2m³/min.

This 7.5 kw screw air compressor uses the direct connection structure. So there is no loss and it has low maintenance costs. It is easy to disassemble, and significantly reduces downtime.

If no air consumption for a long time, the twin screw air compressor will automatically stop. When the air is restored, it will start again. Besides, it can display various faults. It can ensure the reliable operation of the air compressor to the greatest extent, and improve its service life.

Firstly, we can print your logo on the 10 hp 3 phase screw air compressor. Secondly, if you need special voltages, they are available. In addition, if you want to use other brand parts, we can also customize it.

① Air compressor power is different

Assume the airflow is the same ~ 3m³/min. The single screw compressor power is 5.6~6.2KW. But the power of the double screw air compressor is a bit bigger: 6.0~6.6KW.

② Noise and vibration

Single screw: no vibration (steel coins can stand upright and not fall down). The noise is 60-68dB. Twin screw compressor: the vibration is greater because the forces cannot be balanced. The noise is 68-88dB. For example, the noise of a 10 hp 3 phase screw air compressor is 68dB.

③ Bearing durability

Single screw compressor: radial and axial balance. Long bearing life. Rotor bearing 30,000 hours. Star wheel bearing 50,000 hours.

Twin screw type compressor has no balance at all. The load of the second rotor is extremely large. The bearing life is short, generally: 8000-18000 hours. It needs professional personnel to replace the bearings.

④ Temperature

The exhaust temperature of the single screw compressor is <90°C. Twin-screw temperature <110°C.

① Electricity fee (calculated at 3m³/min)

Single screw: 35.62508=33600KW/h.

Twin-screw air compressor: 36.52508=39000KW/h.

② Normal maintenance fee

Assume both run for 30 years. The twin-screw machine needs to change the screw 5 times. The cost is equivalent to 1.5 times that of buying a new airend.

The single screw only needs to change the star wheel 3 times. Besides, the price of the star wheel is quite low. The cost of this piece of single-screw is only about 10% of that of twin-screw. If it’s fixed speed drive 10 hp 3 phase screw air compressor, there are 4pcs or 6pcs bearings. AC airend has 4pcs bearings. And AB airend has 6pcs bearings.

③ Oil consumption

The single screw has a low operating temperature. So the oil itself is not demanding. Therefore the cost is low.

The twin screw air compressor runs at high temperatures. Therefore, the requirements for oil are high. Additionally, high temperatures carbonize the oil. Need to replace oil many times. So the cost is high.

④ Bearing life (equal SKF bearing)

The bearing of the single screw compressor is replaced every 30,000 to 50,000 hours.

The twin-screw compressor is changed every 8000-18000 hours.

The former: single-screw rotor drives two symmetrically distributed star wheels to rotate. Screw groove and the inner wall of the casing form a closed chamber. Bring the air to the required pressure.

The latter: the airend consists of intermeshing rotors. When working, one rotor rotates clockwise. The other turns counterclockwise. So it generates the compressed air during intermeshing.

Single-screw air compressor: the force balance is excellent. Screw bears radial and axial air forces. They can be automatically balanced. The star gear teeth bear the forces. So it requires that the star gear teeth have sufficient strength and rigidity.

Twin screw type air compressor: the screw rotor bears large radial and axial air forces. The air forces are unbalanced. However, it can improve axial force balance through structural design. There are no unbalanced inertial forces.

Former: it can use ordinary bearings for screws and a star wheel. Manufacturing costs are lower.

Later: the load on the two-screw rotor is relatively large. Therefore, it requires to use of high-precision bearings. Manufacturing costs are higher. For this 10 hp 3 phase screw air compressor, we can supply a good price. Different spare parts, different prices.

The former: it’s suitable for occasions with high exhaust pressure. It can also be made into a water-lubricated air compressor.

The latter: There are limitations in terms of rotor stiffness and bearing load. Therefore, it can only be suitable for the medium and low-pressure range. The exhaust pressure generally doesn’t exceed 1.6Mpa.