... aluminum alloy(or cast iron, cast steel)valve body, valve core, valve stem, splint, pull rod and or so ... clockwise, valve stem drive the splint and compress valve core to close valve, conversely, open the valve.So, ... tools; Install and Maintain:1,Our Pinch Valve’s measurement is Accord with Machinery industry standard ... just to remove the valve to replace a new valve core, the valve can use for a long ...