Selection of molecular sieve programmable control valves
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Process conditions: Shut-down pressure difference: 5.5 MPA. Temperature: Room temperature to -50 degrees Celsius. Leakage classification: CLASS V. I tried 2 services, and the results were only mediocre. For three-eccentric butterfly valves, what are some good products from manufacturers, including domestic ones? It’s best if it has been used in a similar place.
I wonder if LZ has used TYCO? If not, you can give it a try
TYCO is good in itself; I’ve used it elsewhere. Are there any records of TYCO’s performance under similar conditions? It will need to be changed in the future after all, as it’s quite expensive, and it would be troublesome if it still doesn’t work well.
We have previously used ORBIT valves in molecular sieve dehydration projects, but the temperature we used was over 200 degrees; I’m not sure about lower temperatures. You can take a look – their advantage is that they can be switched on and off frequently
Using a butterfly valve for this programmable valve does not yield good results; when I discussed it with customers, they no longer chose butterfly valves! I’m not sure what the difference is between this and the one used in pressure swing adsorption
There is a batch of valves; some are large in size, some require adjustment, and the leakage tolerance needs to be at level 5-6. Taking factors such as the overall cost into account, butterfly valves were chosen. A few small valves have chosen GLOBE; it is also used for programmable control of molecular sieves. A large temperature difference between normal operation and regeneration is a characteristic. What are the new methods available these days? Please introduce them.
Can’t we use a ball valve? Hartman’s could be considered!
This post was last edited by fs1976 on 2011-4-4 at 12:21. The ORBIT valve used in the molecular sieve dehydration system operates at a regeneration temperature of over 270 degrees; the adsorption pressure is 6–10 Mpa, while the regeneration and cold blow pressures are 2.5–3.5 Mpa. The cold blow temperature ranges from 30 to 40 degrees. When throttling and reducing pressure, the temperature behind the valve is around -6 to -7 degrees, with limits reaching as low as -30 to -40 degrees, yet the valve still functions properly. The ORBIT valve is characterized by its ability to handle large pressure differences and frequent switching