Spring-loaded high security seals

The nitrogen line valve , the opening pressure is calibrated eight kilograms of concentrated frost normal valve of the valve and the connecting pipe , but the problem of frost formation valve slowly over time spread to the body , and ultimately the entire valve will frost valve without four kilograms low temperatures jumped , valves and piping leaks where the link is clear that replacement parts do not feel connected outlet , but still frost , the problem is that the safety valve accory indicative seals performance is poor , resulting in valve leakage , liquid nitrogen into the valve chamber , and even spring chamber , causing the entire body will be frosted surface temperature is too low , it is recommended to replace the valve and grinding the seat, ensure that the valve high security seals performance. And this needs to be done cryogenic valves cryogenic treatment , cryogenic experiments , if not do these words , the performance of the valve can not be guaranteed .