German PRESSOL pump PRESSOL model PRESSOL price

PRESSOL pump refers to a device or equipment that uses mechanical, physical, chemical, or physicochemical methods to evacuate gas from a container to achieve vacuum. In simple terms, a vacuum pump is a device that improves, generates, and maintains vacuum in a closed space using various methods. According to the working principle, vacuum pumps can be basically divided into two types: gas capture pumps and gas transfer pumps. They are widely used in metallurgy, chemical industry, food, electronic coating, and other industries.

PRESSOL pump system structure

The arrangement structure of the vacuum pump body determines the overall structure of the pump. For vertical structures, the inlet and outlet ports are arranged horizontally, making assembly and pipeline connection convenient. However, the center of gravity of the pump is higher, resulting in poor stability during high-speed operation, so this type is mostly used for small pumps. For horizontal pumps, the inlet is at the top and the outlet is at the bottom. Sometimes, to facilitate the installation and connection of vacuum system pipelines, the outlet can be connected horizontally, meaning the inlet and outlet directions are perpendicular to each other. In this case, the outlet can open to the left or right; except for the end connected to the exhaust pipe, the other end is blocked or connected to a bypass valve. This pump structure has a low center of gravity and good stability during high-speed operation. Generally, large and medium-sized pumps adopt this structure. The two rotor shafts of the pump are installed perpendicular to the horizontal plane. This structure allows easy control of assembly clearance, convenient rotor assembly, and a small footprint for the pump. However, the pump's center of gravity is higher, gear disassembly and assembly are inconvenient, and the lubrication mechanism is relatively complex.

PRESSOL pump features

1) Large pumping speed over a wide pressure range. 2) The rotor has good geometric symmetry, resulting in low vibration and smooth operation. There are gaps between the rotors and between the rotor and the housing, so no lubrication is required, friction loss is small, driving power can be greatly reduced, and higher rotational speeds can be achieved. 3) No oil sealing or lubrication is required in the pump chamber, reducing oil vapor contamination of the vacuum system. 4) No compression in the pump chamber, no exhaust valve. Simple and compact structure, not sensitive to dust and water vapor in the evacuated gas. 5) Low compression ratio, poor pumping effect for hydrogen. 6) The rotor surface is a complex curved cylindrical shape, making processing and inspection difficult.

PRESSOL pump usage precautions

1) Whether the vibration generated by the vacuum pump during operation affects the process and environment. If the process does not allow it, choose a non-vibrating pump or take anti-vibration measures. 2) Understand the composition of the evacuated gas, whether it contains condensable vapors, particulate dust, or corrosive substances. When selecting a vacuum pump, it is necessary to know the gas composition and select the appropriate pump for the evacuated gas. If the gas contains vapors, particles, or corrosive gases, consider installing auxiliary equipment such as condensers and dust collectors on the inlet pipeline of the pump. 3) The vacuum pump should be able to remove all gas generated during the vacuum equipment process under its operating pressure. 4) Correctly combine vacuum pumps. Since vacuum pumps have selective pumping, sometimes one type of pump cannot meet the pumping requirements, and several pumps need to be combined to complement each other. For example, titanium sublimation pumps have a high pumping speed for hydrogen but cannot pump helium, while triode sputter ion pumps (or diode asymmetric cathode sputter ion pumps) have a certain pumping speed for argon. Combining the two will result in a better vacuum degree for the vacuum device. In addition, some vacuum pumps cannot operate at atmospheric pressure and require pre-vacuum; some vacuum pumps have an outlet pressure lower than atmospheric pressure and require a forepump, so pumps need to be combined. 5) Requirements for oil contamination in vacuum equipment. If the equipment strictly requires oil-free operation, various oil-free pumps should be selected, such as water ring pumps, molecular sieve adsorption pumps, sputter ion pumps, and cryogenic pumps. If the requirements are not strict, oil-sealed pumps can be chosen, along with some anti-oil contamination measures such as adding cold traps, baffles, and oil traps, which can also meet clean vacuum requirements. 6) Correctly select the operating point of the vacuum pump. Each pump has a certain operating pressure range. For example, the operating pressure range of the 2BV series water ring vacuum pump is 760mmHg~25mmHg (absolute pressure). Within this wide pressure range, the pumping speed of the pump changes with pressure (refer to the pump performance curve for detailed changes). Its stable operating pressure range is 760~60mmHg. Therefore, the operating point of the pump should be selected within this range, and it should not operate long-term under 25~30mmHg. 7) The impact of oil vapor discharged from the vacuum pump on the environment. If the environment does not allow pollution, select an oil-free vacuum pump or discharge the oil vapor outdoors. 8) The operating pressure of the vacuum pump should meet the ultimate vacuum and operating pressure requirements of the vacuum equipment. For example, if a vacuum drying process requires a working vacuum degree of 10mmHg, the ultimate vacuum degree of the selected vacuum pump should be at least 2mmHg, and preferably reach 1mmHg. Typically, the ultimate vacuum degree of the selected pump should be half to one order of magnitude higher than the working vacuum degree of the vacuum equipment.

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