Which are the real advantages and the disadvantages of the valves with metal seals? Would they be fallacies?
The pros are high speed and long life, the cons are sticking after sitting idle and increased air loss.
Metal sealed solution valve are ideal for quick response times and 24/7 usage, also there life expectancy is greatly increased, although dissadvantages are you need very clean air and a regulated temp range for optimum use. Even by leaving the valves over a weekend without use could enable the valves to “stick”, my opinion now would be to use a standard sealed valve, unless your requirements are for high speed and high usage.