Fail-sale valve

摘要

A fail-safe valve suitable for a sub-sea oil production module has a valve 1 fitting within a valve block of the module, an actuator 5 and a mechanical leaf spring 4 to move the valve to the fail-safe position in the event of any malfunction of the actuator. The use of a leaf spring gives the potential for producing a module with smaller overall dimensions than hitherto without sacrificing spring power. IMAGE