The best manual valves for on off service are those that allow flow to move straight through the body, with a full-area closure element that presents little or no pressure drop. Usually if a manual ...

Manual valve actuators do not require an outside power source to move a valve to a desired position. Instead, they use a handwheel, chainwheel, lever, or declutchable mechanism to drive a series of ...

The system consists of a small, battery-powered valve monitoring device (VMD) that is installed on existing or new valve actuators using a NAMUR interface, or on manual valves with an ISO 5211 ...