What makes pilot-operated safety valves special?
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Why are such safety valves used in the circulating hydrogen desulfurization tower?
Advantages: Good sealing performance, suitable for environments with high back pressure. The disadvantage is its complex structure, with more sealing points than conventional safety valves.
Generally, pilot-operated safety valves are used at the top of high-pressure separators.
When the pressure of the working medium is too high, the pressure acting on the valve disc becomes excessive; it is difficult to handle this situation relying solely on springs or other loading mechanisms. The use of a non-direct-acting pilot safety valve allows for overcoming conditions such as high pressure and large diameters.