CPI Switch 2″ DN50

CPI switch suitable for use with a 2″ Gas Valve.

The Closed Position Indicator (CPI) switch is a mechanically activated micro-switch for monitoring the position of the gas valve.

The unit is a mechanically activated switch for monitoring the position of the valve plate. When the valve is closed, the plate contacts the valve seat. The switch rod is pushed, and the electric contact is switched in configuration 1-3. When the valve opens, the plate leaves the seat and frees the rod, so that the contact switches in configuration 1-2, under the action of a return spring. Norm EN 161 specifies that the switch must commute when the plate is within 1mm of its closed position, so the CPI is used to detect the closed status, not the completely open status.