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Do you know the little knowledge of these oil-free scroll vacuum pumps?

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Do you know the little knowledge of these oil-free scroll vacuum pumps?

Date of release:2019-07-22 Author: Click:

First, the product use and scope of use of oil-free scroll vacuum pump


The oil-free scroll vacuum pump is a new generation of oil-free vacuum pump. It has a high compression ratio, stable pumping speed in a wide pressure range, and the performance has reached the international advanced level, replacing the similar products with high foreign prices. It will not pollute the vacuum chamber, nor will it cause environmental pollution around the pump body. It can also be continuously operated near atmospheric pressure. The operation is very simple, and the green vacuum is the first choice for energy saving and emission reduction. It is widely used in molecular pump connections, medical instruments, electronics, semiconductors, pharmaceuticals, vacuum packaging, solar energy, vacuum drying filtration, scientific research, analytical instruments, vacuum immobilization, gas degassing, vacuum forming, leak detection, accelerators, sputtering equipment, Recycling devices, etc.


The oil-free scroll vacuum pump is composed of two involute spiral curved disks, namely a fixed scroll and an orbiting scroll. The orbiting scroll is eccentrically mounted, and the fixed scroll and the orbiting scroll form a lunar cavity. As the orbiting scroll rotates, the moon-bud shaped cavity is continuously rotated inwardly and compressed, and finally discharged from the center to the air outlet. The orbiting scroll continuously operates, and the gas is continuously sucked and compressed from the air inlet, and is discharged from the air outlet to form a vacuum.

无油涡旋真空泵

Oil-free scroll vacuum pump features:

● No lubrication is required and no water cooling is required.

● There is no oil return and no oil injection.

● Low noise and low vibration.

●The fixed scroll does not touch and the energy consumption is low.

●The sealing material is super wear-resistant, reliable and durable.


Oil-free scroll vacuum pump composition and working principle:

The DSC series oil-free scroll vacuum pump consists of a pump head, a motor, and a base. The pump head contains moving and fixed scrolls, crankshaft seals, fans and pump casings. The scroll is composed of a circular plane and one or several involute scroll-shaped discs extending therefrom, and the fixed scroll and the orbiting scroll constitute a scroll to form an essential pump for the oil-free scroll vacuum pump. Gas structure. During the working process, the movable and fixed scrolls are not in contact with each other, and the crescent-shaped closed compression chamber whose volume is continuously reduced is formed by the relative movement, and the gas is sucked from the suction port and the exhaust port through the cycle of suction, compression and exhaust. Discharge, to achieve vacuum on the pumped cavity.


1, check the product

1) Check if the box is facing up and then open it.

2) Check if the model number is the one you ordered.

3) Check for damage. In case of damage, a claim should be filed with the carrier.

4) Remove the inlet clamp and the outlet clamp.

5) Check the packing list in the plastic bag of the product packaging, and whether the product name and quantity are fully packaged.


2, the working environment

1) There is a risk of electric shock. Install the pump in an area that is not exposed to wet conditions such as rain or steam. Moisture on the power connector may cause a short circuit and cause personal injury or electric shock.

2) There is a danger of explosion and fire. The installed area should not be exposed to explosive, flammable gases or other related hazards. Otherwise, the pump may cause an explosion or fire.

3) Operate at an ambient temperature of 5 ° C to 40 ° C. Operation outside this ambient temperature range may result in fire, damage, or malfunction.

4) Ensure proper ventilation. Install the unit in a well ventilated area. Because the scroll pump is poorly ventilated by air cooling, it may cause abnormal overheating, fire or malfunction.

5) Install the pump in the appropriate place. Install the area so that it is not exposed to dust or corrosive gases. Failure to install the pump in a suitable location may result in damage or malfunction. Install the pump so that it is not exposed to debris such as iron, gravel, abrasives or wood dust. Install the area so that the pump is not exposed to direct sunlight. Direct sunlight can cause high temperatures and malfunctions.


3, the installation of the pump

The pump is equipped with lifting eyebolts for transport. Lifting equipment with sufficient load carrying capacity should be used. Never stand under the suspended pump while the pump is being lifted. Install the pump on a firm, level surface (slope less than 5°). The installation is not stable and may cause a malfunction. If the ground is not stable, the pump should be fixed by: fixing it with a 10 x φ 8 mm hole on the pump foot.


4, electrical connection

Electrical connections must be made by a qualified electrician. Otherwise, electric shock or fire may occur. Disconnect the input mains before wiring the pump. Failure to do so may result in electric shock. The power supply and voltage should be checked before wiring. Three-phase motors are available in two voltages: 380V 50HZ; 440V 60HZ.


1. The inlet (flange) of the pump is KF40 and the outlet (flange) is KF25.

2. Generally, the pump inlet is directly connected to the vacuum chamber, but the premise is that it must be a clean gas.

3. If there are debris, water vapor, dust, etc., it is recommended to use the following diagram to connect.

4. Install the isolation valve between the vacuum chamber and the inlet of the pump to prevent debris from being pumped back into the vacuum chamber during start-up or shutdown.

5. We recommend the use of an automatic valve as an isolation valve that closes in the event of a power failure to prevent debris from being drawn back into the vacuum chamber from the inside of the pump.

6. Install an inflation valve between the isolation valve and the inlet of the pump. Open the inflation valve during system operation to remove dirt and water vapor from the pump.

7. Use a clean connecting tube between the vacuum chamber and the vacuum pump. We recommend using a hose between the inlet of the pump and the vacuum chamber so that the vibration of the pump does not propagate to the vacuum chamber.

8. Ensure that the exhaust pipe is not blocked during operation.

9. Ensure that the pump outlet pressure does not exceed atmospheric pressure.


1, start

1) Before starting the pump, check the condition of each connection interface, and seal it, otherwise it will affect the vacuum.

2) If you are pumping wet air or condensable steam, open the air inlet to clean it before starting the pump as described below.

3) After the pump is first started or left unused for a long time, it takes 6-8 hours for the pump to reach its ultimate pressure.

Close the inlet isolation valve, run the pump continuously for 6-8 hours, open the inflation valve 2-3 times per hour, and vent for 3-5 seconds each time. However, if the pump is stopped in the middle, moisture may enter the pump and the time required to reach the ultimate pressure will be prolonged.

4) When starting the pump and stopping the pump, close the isolation valve between the vacuum pump and the vacuum chamber. Otherwise, debris may be pumped back into the vacuum pump.

5) When restarting the pump that is already at the operating temperature, open the inflation valve for 3-5 seconds before starting the pump. Otherwise, the temperature of the pump may become unstable and cause a malfunction.


2, operation

Start the pump by following the steps below:

1) Close the isolation valve to prevent debris from being pumped back into the vacuum chamber from the vacuum pump. (Open the inflation valve, if this valve is installed).

2) Turn on the vacuum pump.

3) Open the isolation valve (close the inflation valve, if this valve is installed), and pump the vacuum chamber.


3, pumping

1) Continuous operation of the pump close to its ultimate pressure (for example, the foreline turbomolecular pump) may cause foreign matter or moisture to deposit in the pump and cause a malfunction.

2) When operating, close the isolation valve and open the inflation valve for 3-5 seconds, so that it is performed once a day to remove foreign matter from the pump.

3) Operating at specified humidity When pumping steam, the inlet gas temperature must be below 50 °C. When the steam humidity is above 50 °C, a condenser or cold trap is installed in the piping between the vacuum chamber and the pump to reduce the inlet steam temperature to below 50 °C. Steam with a suction temperature higher than 50 °C may cause a malfunction.


4, pumping steam

1) When pumping steam, open the air inlet. If steam is pumped while the port is closed, the condensed moisture will remain in the pump, which will cause a malfunction.

2) When the air intake is opened, the noise level and the limit pressure increase.


5, the purpose of air washing

1) The amount of tidal gas in the suction pump varies depending on the temperature and pressure in the vacuum chamber. Pumping moisture can cause moisture to condense in the pump. This residual moisture can degrade or fail the ultimate pressure performance of the pump.

2) When the vacuum chamber contains gas with a humidity greater than 60% RH, the air inlet must be turned on to operate the pump.

3) Open the air inlet and run the pump to remove moisture so that the pump can reach its ultimate pressure.


6, stop

1) After evacuating the steam, continue to operate for more than 1 hour with the air inlet open.

2) Immediately after the steam is exhausted, the air intake port is closed or the pump is stopped, and the condensed moisture will remain in the pump and cause a malfunction.

3) When stopping, in order to prevent debris from being pumped back into the vacuum chamber, close the isolation valve (open the inflation valve if this valve is installed).

4) Turn off the vacuum pump.

5) When the pump is stopped, the atmosphere is sucked back into the pump from the air inlet, and the pressure inside the pump becomes equal to the atmospheric pressure. In order to maintain the vacuum in the vacuum chamber and prevent debris from being sucked back into the vacuum chamber from the vacuum pump, the isolation valve to the vacuum chamber should be closed before the pump is stopped.


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