Several kinds of vacuum system is commonly used in vacuum furnace
Vacuum system vacuum heat treatment furnace of the vacuum system of the three basic requirements:
1) quickly will the vacuum pump vacuum heat treatment furnace to the specified requirements.
2) can be processed in time artifacts and components of various gas release in the furnace, and because of the vacuum leak gas into the furnace.
3) vacuum unit covers an area of small, safe and reliable running, easy operation.
The composition of the vacuum system
Vacuum furnace the vacuum system vacuum heat treatment furnace is usually obtained by vacuum equipment (vacuum pump unit), control of vacuum components and measuring vacuum components.
1) pump unit. According to the size of the furnace pressure and swept volume, selecting different high in low vacuum pump, vacuum pump, vacuum pump and ultra-high vacuum pump.
2) vacuum components or elements. In a vacuum furnace and vacuum pump unit is equipped with a variety of vacuum components or true word elements, such as pipe, sealing ring, flange, corrugated pipe, cold trap, filters and valves, etc.
3) vacuum measurement system, such as vacuum gauge, vacuum gauge and other vacuum measuring instrument. 4) the vacuum leak detection equipment, vacuum control instruments, pneumatic device, etc.
Variety of vacuum furnace, to the requirements of vacuum system is different. In terms of vacuum degree, low vacuum, vacuum and high vacuum system. Here are several commonly used vacuum system.
1. The low vacuum system
Low vacuum system is suitable for 2 ~ 1333 pa range of vacuum degree in vacuum heat treatment furnace, such as drainage of low vacuum in pit type furnace. Most is given priority to with rotating mechanical pump oil seal type pump.
2. The vacuum system
Applicable to the vacuum degree in vacuum system in 3 X10 ~ ~ 1.333 Pa range of vacuum heat treatment furnace. Vacuum system of the most widely used in the vacuum heat treatment furnace, it usually consists of two stage vacuum pump unit. Primary pump with rotating mechanical pump or valve type mechanical pump, main pump with mechanical pump, roots pump) or oil booster pump
3. The high vacuum system
High vacuum system is suitable for vacuum degree in 6.6 X 10 ~ ~ 6.6 X 10. Pa range of vacuum heat treatment furnace, such as vacuum annealing furnace, vacuum brazing furnace, usually composed of 3 vacuum pump unit, the main pumps usually USES oil diffusion pump, pump, primary pump is mostly adopted rotating mechanical pump or valve type mechanical pump.