-120 degree pot cold trap Introduction
Pot-type cold trap is a small ultra-low temperature freezing equipment, which is suitable for various purposes such as vacuum coating cold trap, biochemical petroleum experiment, low temperature liquid bath, gas capture, and drug freeze-drying.
The principle and application of cryogenic cold trap
A cold trap is a trap that traps gas by condensation on a cooled surface. It is a device placed between the vacuum container and the pump to absorb gas or trap oil vapor.
A device that uses physical or chemical methods to reduce the partial pressure of harmful components in a gas and vapor mixture is called a trap (or trap).
overview
Rapid evacuation of the process chamber, with water vapor efficiency, is a key requirement for maximum efficiency in thin film coating.
Fast “cool down” shortens cycle time
Efficient water vapor pumping (cooling power)
quick defrost
Ultra-low temperature cold trap machine introduction:
The ultra-low temperature cold trap machine adopts a single compressor and a natural cascade refrigeration system. The multi-component mixed working medium realizes cascade between the high boiling point component and the low boiling point component through the method of natural separation and multi-stage cascade, and achieves Take the purpose of ultra-low temperature.
Application principle:
In the high vacuum environment where the oil diffusion pump is used, there is a certain amount of residual gas, more than 80% of which are water vapor, oil vapor and other high boiling point steam, but its ability to remove residual gas is low, the time is long, and the remaining The gas is also the source of pollution of the workpiece, which affects the output and quality of the product. The cryogenic trap pump is the best choice to solve the problem.
The working principle of the water vapor capture pump: place a refrigeration coil that can reach below -130°C in the vacuum chamber or the pump port of the oil diffusion pump, and quickly capture the residual gas in the vacuum system through the low-temperature condensation effect on its surface . Thereby greatly shortening the vacuuming time (can shorten the pumping time by 60-90%), and obtain a clean vacuum environment (the vacuum degree can be increased by half an order of magnitude, reaching 10-8Torr, 10ˉ5Pa).
1. Water vapor trap:
Its refrigeration coil is often installed between the high valve and the vacuum chamber or in the vacuum chamber, the upper and lower chambers of the winding coating, etc. It is suitable for occasions where the outgassing of the coated material such as plastic low-temperature coating and coil coating is large. The coil needs to have a heating and defrosting device, so that the coil returns to normal temperature before opening the door each time, so as to prevent the low-temperature coil from absorbing a large amount of water vapor from the atmosphere and frosting, which will affect the next vacuuming.
2. Cryogenic cold trap:
Put it at the pump port of the oil diffusion pump, below the high valve. Its main function is to prevent the oil from returning to the oil diffusion pump, and at the same time, it can speed up the pumping speed and increase the vacuum degree. Since the system is in a vacuum state, no defrosting device is required.
The two can be installed separately or at the same time as required.
Main performance characteristics:
1. Rapid adsorption of water and oil vapor can shorten the pumping time by 60-90%
2. Increase the production capacity of your existing vacuum system by 20% to 100%
3. Improve the quality of the coating, improve the adhesion of the film and the ability of multi-layer coating
4. Rapid cooling, cooling to -120°C within 3 minutes, down to -150°C
5. 2 minutes of hot air defrosting, rapid return to temperature, 5 minutes to cool down
6. One device can design two load outputs
7. Imported compressor, environmentally friendly mixed refrigerant
8. With two load inlet and outlet temperature display, local temperature display
9. When the standby temperature is reached, there will be an indicator light to indicate that it can start cooling
10. Compressor discharge is too high, pressure is too high protection
Ultra-low temperature cold trap, vacuum cold trap, liquid nitrogen cold trap, cryogenic cold trap.
Ultra-low temperature equipment such as cryogenic liquid baths. Products are widely used in scientific research institutes, universities, aviation, biopharmaceuticals, electronics, metal processing and other industries.
-135 degrees ultra-low temperature pan cold trap
Cold trap processing is a cooling device used to collect substances within a certain melting point range. Put a U-shaped tube in the refrigerant, when the gas passes through the U-shaped tube, the substance with a high melting point becomes a liquid, and the substance with a low melting point The material passes through the U-shaped tube to play the role of separation.
The -135°C pan-type cold trap is a small ultra-low temperature freezing equipment, which is suitable for various purposes such as Parylene vacuum coated cold trap, biochemical petroleum experiment, low temperature solution, gas puff collection, drug freeze-drying, etc. The size of the cold trap and the refrigeration method can be Individually customized according to user needs.
Capture the water vapor and harmful gases discharged from the vacuum drying box or decompression concentration device, improve the efficiency of the vacuum system, greatly reduce the steam intake of the vacuum pump, and prolong the service life of the vacuum pump.
The temperature of the cold trap is digitally displayed, which is convenient for determining the start-up time of the vacuum pump and prevents the moisture in the piping from being pumped into the pump.
The cold trap tank is made of 304 stainless steel, which can be used for water-based and ethanol-based experiments. After being equipped with a glass condenser, it can be used for acid-based and organic solvent-based experiments.
Application field
Vacuum coating, surface treatment, optoelectronics, aerospace, quartz crystal, solar collector tubes, scientific research institutes, biopharmaceuticals, chemical industry, electronics industry.
Post time: Apr-14-2023