cemo,
plug valves seal off by the use of thick plug valve grease between the plug and seats. sense grease is the main seal, the valve is very dependable when greased before use.
i have some shafer actuators that i am repairing and i need help with model numbers. i can't read the serial numbers due to sand blasting, painting, and just lack of tag. i have a manual hydraulic pump on one that has two shafts for the pump with a selector for witchever shaft u would want to...
