The TVH-R20GNPM161 is a TopWorx valve position switchbox with a 316 stainless steel base and lid. It is rated intrinsically safe.
Position sensing is by two SPDT reed switch modules. The switchbox has a standard 90° visual indicator showing green for open and red for closed, a NAMUR 316 stainless steel shaft, two ½" NPT conduit entries and silicone O-rings.
It is fitted with one 24VDC pilot (fail open/closed) and a 316 stainless steel spool valve rated 1.0 Cv with 1/4" NPT ports.