German Wanner pump Wanner model Wanner price

Wanner pumps are also known as positive displacement devices. Like a piston in a cylinder, when one gear tooth enters the fluid space of another, the liquid and the tooth cannot occupy the same space simultaneously because liquids are incompressible. Thus, the liquid is mechanically squeezed out. Due to the continuous meshing of the gears, this phenomenon occurs continuously, providing a continuous discharge volume at the pump outlet. The discharged volume is the same for each revolution of the pump. As the drive shaft rotates continuously, the pump discharges fluid without interruption. The pump flow rate is directly related to the pump speed.

Wanner pump structural features

1) Simple structure and low cost; 2) Low operational requirements and wide application; 3) The end covers and the spaces between the gear teeth form many fixed sealed working chambers, so it can only be used as a positive displacement pump. The gears adopt the advanced double-circular-arc sine curve tooth profile technology from the nineteen-nineties. Compared with involute gears, its most prominent advantage is that there is no relative sliding on the tooth flank during meshing, resulting in no wear on the tooth surface, smooth operation, no fluid trapping, low noise, long service life, and high efficiency. This pump breaks away from the constraints of traditional design, bringing gear pumps into a new realm in terms of design, production, and use. The pump is equipped with a differential pressure safety valve for overload protection. The full return pressure of the safety valve is 1.5 times the rated discharge pressure of the pump. It can also be adjusted according to actual needs within the allowable discharge pressure range. However, this safety valve cannot be used as a pressure reducing valve for long-term operation; a pressure reducing valve can be installed separately if needed. The shaft end seal of the pump is designed in two forms: one is mechanical seal, and the other is packing seal, which can be determined based on specific operating conditions and user requirements.

Wanner pump features

1) High pumping speed over a wide pressure range. 2) The rotor has good geometric symmetry, resulting in low vibration and smooth operation. There are clearances between the rotors and between the rotor and the housing, so no lubrication is required. Friction losses are small, which greatly reduces the drive power, allowing for higher speeds. 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, insensitive to dust and water vapor in the extracted gas. 5) Low compression ratio, poor pumping effect for hydrogen. 6) The rotor surface is a complex curved cylindrical surface, making processing and inspection difficult.

Wanner pump precautions for use

1) Whether the vibration generated by the vacuum pump during operation affects the process and the environment. If the process does not allow it, choose a non-vibrating pump or take anti-vibration measures. 2) Understand the composition of the extracted gas, including whether it contains condensable vapors, particulate dust, or corrosive components. When selecting a vacuum pump, you need to know the gas composition and choose the appropriate pump for the extracted gas. If the gas contains vapors, particles, or corrosive gases, consider installing auxiliary equipment such as condensers and dust collectors on the pump inlet pipeline. 3) The vacuum pump should be able to remove all the gas generated in 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 provide 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 fore pump, so they all need to be used in combination. 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, to 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). In such a wide pressure range, the pumping speed of the pump changes with pressure (see the pump performance curve for detailed changes). Its stable operating pressure range is 760~60mmHg. Therefore, the pump's operating point 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 of 10mmHg, the ultimate vacuum of the selected vacuum pump should be at least 2mmHg, and preferably 1mmHg. Typically, the ultimate vacuum of the selected pump should be half an order of magnitude to one order of magnitude higher than the working vacuum of the vacuum equipment.

Weidou Intelligent Technology specializes in selling German Wanner centrifugal pumps, Wanner gear pumps, Wanner diaphragm pumps, Wanner centrifugal pumps, Wanner piston pumps, Wanner vacuum pumps, Wanner screw pumps, Wanner submersible pumps, Wanner peristaltic pumps, Wanner lubrication pumps, Wanner vane pumps, Wanner metering pumps, Wanner hand pumps, Wanner drum pumps, Wanner lobe pumps, Wanner booster pumps, Wanner liquid pumps, Wanner air pumps. Original imports from Germany. Welcome customers to inquire and order.