The normally closed valve is open whenever the normally open valve is closed.

block system with signals normally at clear

The on-off valve (58) is normally open.

The PTCCG is normally opened when not in use.

A similar normally opened valve (104) is also disclosed.

This can be either normally open or normally closed.

(4) relay outputs (normally open or normally closed)

The normally open solenoid valve (4) and the normally closed solenoid valve (5) are two synchronous solenoid valves that operate simultaneously.

The solenoid valve (14) is normally open, i.e. it is normally kept in the first operating position.

The casing (20) is normally open between the two spirals (21, 31).

Functioning: 2/2 way pneumatically operated, Double effect, Normally closed, Normally open

Function: 2/2 and 3/2 Way Normally Closed and Normally Open.

The normally open blade (55) is ultrasonically welded onto a normally open terminal (69) to form a normally open contact assembly (71).

A bias force urges the pin into a normally open position.

A normally open secondary valve (56) is movable to a closed position.