LEAK-FREE RISING STEM VALVE WITH BALL SCREW ACTUATOR

摘要

A rising stem valve with a magnetic actuator having an outer and an inner magnet assembly that are magnetically coupled to each other so that the inner and outer magnet assemblies rotate together and a ball screw that is connected to the rising stem valve and that converts rotary to reciprocal motion. The inner magnetic cartridge assembly and valve body comprise a sealed lower section that is completely sealed to the outside environment.