Application principle: There is a certain amount of residual gas in the high-vacuum environment where the oil diffusion pump is used. More than 80% of the residual gas is water vapor, oil vapor and other high-boiling vapors. But all the residual gas is also the source of the workpiece, which will affect the quantity and quality of the product. Cryogenic pump is a good choice to solve such problems.
The working principle of cryogenic pump: place a cooling coil that can be below -120 ℃ in a vacuum chamber or oil diffusion pump port to capture rapaidly the residual gas vacuum system through the surface of the low-temperature condensation effect. So that it reduce evacuation time (60-90% reduction in evacuation time) and geta clean vacuum environment (up to a half-order vacuum, 10-8 Torr, 10-5 Pa).
The main performance characteristics
1, It can absorb vapor of water and oil quickly, so that it can reduce evacuation time 60-90%;
2, It can improve coating quality and making coating not fall off and pure color;
3,Cooling rapidly. It can cool to -120 ℃ or even -150 ℃ within 1 minute;
4,hot gas can defrost within 30 seconds,then return to warm and cooling within 2 minutes;
5, There is touch screen and PLC which makes a perfect automation control;
6, Dual-way load can be designed;
7,mixed of imported compressors and green environment mixed refrigerant;
8, with two load inlet and outlet temperature display and device temperature display;
9, defrost temperature can be freely set;
10, with water temperature and exhaust temperature display;
11, With water shortage and high temperature alarm;
12, Self protection when compressor exhaust and pressures is too high;
13, It can be free conversion between local and remote control;
14, With RS485 computer data interface, the computer can read temperature data and its control.
| ETH-135-20A | ETH-135-32A | ETH-135-32AX | ETH-135-50A | ETH-135-50AX | |
| Compressor | Bitzer | Bitzer | Bitzer | Bitzer | Bitzer |
| Compressor power（HP） | 10 | 12 | 12 | 15 | 15 |
| Maximum power（kW） | 11.7 | 14.1 | 14.1 | 18.1 | 18.1 |
| Working current（A） | 21 | 24 | 24 | 31 | 31 |
| Rated current voltage | 380V，50Hz， three phase and four wire | ||||
| Working temperature（℃） | -100～-150 | ||||
| Evacuation(L/s) | 149000 | 238400 | 238400 | 372500 | 280000 |
| Maximum cooling capacity（W）
(-100℃) |
2100 | 2800 | 2800 | 3800 | 3800 |
| Length of refrigerating pipe | 20m，Φ16mm | 32m，Φ16mm | double lines
16m，Φ10mm |
50m，Φ16mm | double lines
14m，Φ16mm |
| Suface area of refrigerating pipe
（m²） |
1 | 1.6 | 1 | 2.5 | 1.5 |
| Cooling mode | Water cooled，temperature18℃~30℃，The water pressure2bar~4bar | ||||
| The cold water flow
（t/h） |
1.8 | 2.5 | 2.5 | 3.2 | 3.2 |
| Cold water interface size
（mm） |
16 | 16 | 16 | 19 | 19 |
| Pre-refrigerating time
（min） |
30 | ||||
| cooling downtime（min） | ≤3 | ≤4 | ≤4 | ≤5 | ≤5 |
| Defrosting time
（min） |
≤3 | ≤3 | ≤3 | ≤4 | ≤4 |
| Re-cooling downtime（min） | ≤3 | ≤3 | ≤3 | ≤3 | ≤3 |
| Apply oil diffusion pump diameter
（mm） |
≤800 | ≤900 | ≤600 | ≤1000or 2×600 | ≤800 |
| Apply cavity diameter
（mm） |
≤1300 | ≤1500 | ≤1000 | ≤1800 | ≤1500 |
| Need power cold water machine
（HP） |
7 | 8 | 8 | 10 | 10 |
| Weight | 480kg | 550kg | 550kg | 580kg | 580kg |
If possible, kindly suggest please your working industry/process, working pressure, working medium, etc. Given detailed request helps to gain better-matched customized solution. Thanks for your patience.
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