Resolve the long-action valve stem seals for external leakage problem

Internal and external leaks are endangering safety elements. Other automatic control valve stem extends usually by electric, pneumatic, hydraulic actuators control spool rotation or movement. This should resolve the long-action valve stem seals for  mcb circuit breaker  problem; only the electromagnetic force solenoid valve is used to seal the electric magnetic isolation valve core inside the casing to complete, there is no dynamic seal, so easy to block leakage must . Electric valve torque control difficult, prone to internal leakage, and even pull off the stem head;  air circuit breaker  valve structure type is easy to control internal leakage, until reduced to zero. Therefore, the use of special safety solenoid valve, in particular for corrosive, toxic or high temperature media.