The vacuum pump is a rotary variable-capacity vacuum pump. It must be equipped with a foreline pump. It can be used in a wide pressure range. The pumping speed is not sensitive to dust and water vapor in the extracted gas. It is widely used in metallurgy and chemical industry. , food, electronic coating and other industries.
Vacuum pump features
(1) A large pumping speed over a wide pressure range;
(2) The rotor has good geometric symmetry, so the vibration is small and the operation is stable. There is a gap between the rotor and between the rotor and the casing, no lubrication, and the friction loss is small, which can greatly reduce the driving power , thereby achieving a higher rotational speed;
(3) There is no need to seal and lubricate the oil in the pump cavity of the vacuum pump, which can reduce the pollution of the vacuum system by the oil vapor;
(4) There is no compression in the pump cavity of the vacuum pump, and there is no exhaust valve. The structure is simple and compact, and is insensitive to dust and water vapor in the pumped gas;
(5) The compression is relatively low, and the effect on hydrogen gas pumping is poor;
(6) The surface of the rotor is a curved cylinder with a complicated shape, which is difficult to process and inspect.
Vacuum pump classification
According to its working principle, it is basically divided into two types: gas delivery pump and gas capture pump. Gas transfer pump comprising: a liquid ring vacuum pump (water ring vacuum pump) 2, 3 reciprocating pumps, rotary vane vacuum pump 4, fixed type pumps 5, 6 slide valve vacuum pump, a trochoid pump 7, the dry vacuum pump 8, 9 Roots vacuum pump, the vacuum pump 10 molecules, molecular drag pump 11, the composite vacuum pump 12, the water jet pump 13, the gas jet pumps 14, steam jet pump 15, a diffusion pump or the like. Gas trap pumps include: adsorption pumps and cryopumps, etc.
The following is a brief introduction to two common vacuum pumps:
Rotary vane vacuum pump
( Model 2XZ Sliding Vane Rotary Vacuum Pump )
The utility model has the advantages of compact structure, small volume, light weight, low noise and small vibration. Therefore, it is suitable for use as a foreline pump for diffusion pumps, and is more suitable for precision instrumentation and laboratory use. For example: mass spectrometry instruments, refrigerator lines, vacuum freeze dryers, etc.
Roots vacuum pump
( Model ZJH Roots Vacuum Pump )
It is a rotary variable displacement vacuum pump that must have a foreline pump to be used in a wide range of pressures. The pumping speed is not sensitive to dust and water vapor in the extracted gas. It is widely used in metallurgy, chemical industry, Food, electronic coating and other industries. It is mainly used for the main pump of the vacuum unit and cannot be used alone. Need to use the foreline pump to assist. Such as: water ring vacuum pump, slide valve vacuum pump, vertical oil-free vacuum pump, molecular vacuum pump.
Transparent Roller Shutter Door
Material: polycarbonate (PC bulletproof plastic)
Using aluminum profiles for door connection piece, two-layer structure , special design ,embedded into the door sheet. Simple and elegant, strong resistance to stress.
The base is made of aluminum alloy, special design, corrosion-resistant simple and aesthetic.
Mute track is made of aluminum alloy, dual-slot design, the mute material can be embedded into the slot, and creating a quiet environment.
Control system : 24V DC , mute operation, safe and reliable , durable and long life . In the case of obstacles ,doors rebound or stop automatically stop during opening and closing process.
Door opening and closing process, lighting and delaying three minutes automatically ; users can switch to manual option when power failure, uninterruptible power supply . Please contact with our technical department for particular requirements.
Transparent Roller Shutter Door,Transparent Curtain Roller Shutter Door,Commercial Transparent Roller Shutter Door,Polycarbonate Transparent Roller Shutter Door
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.highspeedshutterdoor.com