Basic Info.
Structure
Rotary Vacuum Pump
Exhauster Method
Positive Displacement Pump
Product Description
The performance specification of the rotary piston vacuum pump: the geometric pumping speed is 150 liters/second, and the ultimate pressure is 1 Pa (8x10-3 Torr). Suitable for vacuum smelting, vacuum drying, vacuum coating, vacuum impregnation and other vacuum operations. The slide valve vacuum pump can be used alone or used as the backing pump of other vacuum pumps, but it is not suitable for pumping from one container to another container as a transfer pump. Additional devices should be installed when extracting gases with high oxygen content, explosive, corrosive to ferrous metals, chemical reaction to vacuum oil, water, dust, etc. This type of pump can be used alone or as a backing pump for high vacuum pumps such as diffusion pump, oil booster pump, Roots pump, etc. Compared with rotary vane vacuum pump, H-type spool valve pump is more durable and has a long service life. long. The pump is widely used in vacuum coating, vacuum heat treatment, vacuum sintering, molecular distillation, and aviation simulation tests.
1. Optimized design of counterweight, less vibration and low noise.
2. The bearing seal chamber is supplied with oil separately and is separated from the pump chamber, which prevents impurities from entering the bearing and premature damage to the seal.
3. According to user requirements, auxiliary oil tank can be attached to achieve the function of cooling vacuum oil to separate impurities.Product Photos:Working Principle: The slide valve vacuum pump is equipped with a gas ballast mechanism, which is characterized by accelerating the extraction of steam without polluting the oil. If the spool valve vacuum pump only removes permanent gas, the gas does not liquefy due to the increase in pressure, it does not matter the deterioration of the pump oil, but if it is used for vacuum drying or removing moist air, there will be not only permanent gas in the gas There is also water vapor. If this part of the water vapor is extracted by a pump without a gas ballast valve, the vapor will be liquefied and dissolved in the oil, and the vacuum properties of the oil will deteriorate, thus reducing the pumping speed and vacuum degree of the slide valve vacuum pump. . Now the compression process of water vapor is further elaborated as follows:
1. The water vapor removed by the pump should be compressed in the compression chamber until the exhaust valve is opened. If the temperature in the slide valve vacuum pump is assumed to be 60 °C, the saturated vapor pressure of water at this temperature is 20000 Pa (149 Pa). .4 Torr), once the water vapor in the compression process reaches the above pressure, it begins to condense into water, but the exhaust valve cannot be pushed open at 20,000 Pa (149.4 Torr), because the exhaust valve of the slide valve vacuum pump is open to the atmosphere There is also the pressure of the exhaust valve spring (the exhaust valve spring is calculated according to 1.2 kgf/cm2), that is, the internal pressure of the slide valve vacuum pump pump chamber must be compressed to 120,000 Pa to (900 Torr) or more before the air valve can be pushed open. After the steam is compressed, it is all condensed into water during the compression period and mixed into the oil.
2. In order to meet the requirements of removing humid air without contaminating the oil with water vapor, the slide valve vacuum pump is equipped with a gas ballast mechanism. The pressure of the mixed gas is the sum of the air partial pressure and the water vapor pressure. When the vapor partial pressure has not reached the saturated vapor pressure at the pump temperature, the mixed gas pressure exceeds the exhaust valve pressure and opens the gas valve, so that the steam has no time to slip. The valve vacuum pump is liquefied in the pump chamber and discharged out of the pump.
3. Another purpose of the gas ballast valve of the slide valve vacuum pump can be used to restore the ultimate pressure of the vacuum pump. Sometimes we use it to remove general air, which contains less condensable gas, and the general gas ballast valve is closed, but after a long time, the oil quality is gradually polluted by a small amount of condensable gas in the air. For a pump without a gas ballast mechanism, the original limit pressure of the pump can only be restored by replacing the new oil or heating the pump oil to evaporate the liquefied steam. The limit pressure of the vacuum pump can be restored after the ballast valve runs for 1 to 2 hours.
4. The operation of the gas ballast valve of the slide valve vacuum pump is very convenient. When the gas ballast valve needs to be used, the handwheel of the gas ballast valve can be opened, and the opening of the handwheel can be adjusted. vice versa. So how much the handwheel is opened depends on the vacuum degree required by the user. Generally speaking, when the handwheel is fully opened, the vacuum degree is 13 Pa (10-1 Torr). If the user does not need aeration, the gas ballast valve can be closed.Structure Diagram:Product performance and parameters: Pumping rate - intake pressure curve
Product Application: This pump can be widely used in vacuum coating, vacuum drying, vacuum degassing, vacuum impregnation, vacuum brazing, vacuum heat treatment, vacuum concentration in various occasions such as coating, electrical, electronics, smelting, chemical industry, ceramics, aviation, laboratory and so on. , vacuum reaction, high-altitude simulation test and other vacuum operations. It can be used alone or as a backing pump for high vacuum pumps such as Roots pumps and oil dispersing pumps.Product Features: 1. Small vibration: The pump adopts a double-cylinder structure, so the balance performance is good and the vibration is small.
2. Low power consumption: The pump has a reasonable design and structure, so it is more energy-saving. It operates under extreme vacuum, with low power consumption and low operating costs.
3. Simple operation: easy to refuel and drain, easy adjustment of belt tension, and labor-saving replacement.
4. Easy maintenance: as long as the fuel tank cover is removed, the oil pool can be cleaned and the exhaust valve plate can be replaced without removing the exhaust pipe and the fuel tank, which can be done easily by one person.
5. Safe operation: The pump adopts a closed metal protective cover, which has high safety. When the pump is not in use, all the accumulated water in the water jacket can be drained, which can reduce the erosion of water to the pump, and also avoid the water in the water jacket freezing and cracking the pump body after the pump is stopped in severe cold areas.
6. Reliable and durable work: each friction pair in the pump cavity is well lubricated, the bearing is separated from the pump cavity, and the pump shaft is equipped with a shaft sleeve at the shaft seal, so the main shaft will not be worn, and the shaft sleeve can be used once it is worn. U-turn to continue using. The pump adopts a vertical structure, and the belt tension is offset by the gravity of the pump pulley, so the bearing load is small and the service life is long. The main parts of the pump are reasonably designed, and the large oil tank structure is used to facilitate the separation and cooling of oil and gas, and has a large oil storage capacity, which has a good self-separation effect on the sundries contained in the oil. According to the working conditions, the pump also It can be equipped with a filter with filter screen plugging bypass automatically connected, and an oil flow display device, so this series of pumps can work reliably for a long time, have a long service life, and can run in harsh working environments.
7. Small size and light weight: The design of the pump is moderate in speed, compact and reasonable in structure, and the space utilization rate inside and outside the pump cavity is the highest. The appearance is simple, and the volume is significantly smaller than similar products.
Company Profile:
Address:
Xiaodian Industrial Park, Baita Town, Boshan District, Zibo City, Shandong Province
Business Type:
Trading Company
Business Range:
Industrial Equipment & Components
Company Introduction:
Shandong Zhongbeng Power Equipment Co., Ltd. is located in Zibo City, Shandong Province, which is known as the "pump capital" of China. The company takes the lead in science and technology, adheres to the management principles of "quality first, customer first and credit-based" since the establishment of the company and always do our best to satisfy potential needs of our customers. The products now have been exported to India, Pakistan, Russia, South Africa, Vietnam, Thailand and other countries.
Our products are widely used in petroleum, chemical industry, coal mine, metallurgy, electric power, food, medicine, paper making, textile, heating, refrigeration, urban water supply and drainage and other industries. The main products are: Vacuum pump, diesel engine pump set, diesel generator set, centrifugal pump, submersible sewage pump, chemical pump, corrosion-resistant pump and complete water supply equipment, etc. There are more than 20 series, with more than 1, 000 specifications for customers to choose from.
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