The OVAL NP145B valve open-shut indicator is a mechanical position feedback device for marine and industrial pipeline valves. It synchronously drives the dial pointer via gear linkage to visually display the valve OPEN/SHUT status, and integrates micro switches to transmit remote position signals to control panels through the 4-pin electrical connector. With a cast iron anti-corrosion housing and transparent protective cover, it is widely used on ship piping systems for valve status monitoring.
