The valves use state of the art 8.5 kV rated, 150 mm diameter electrically triggered thyristors.

Solenoid valves may use metal seals or rubber seals, and may also have electrical interfaces to allow for easy control.

The valves are in-line and use straight 6-bolt valve covers.

This valve uses a design similar to that of the dam's base release works.

The valve uses a molecule called a rotaxane that can shuttle up and down along a molecular spine by means of a simple chemical reaction.

The "spool valve" ("spoolie") typically uses the bolt itself to hold air in a filling chamber.

Early variable valve timing systems used discrete (stepped adjustment).

This valve uses air pressure to quickly reset the trigger after a shot, thus enabling a faster rate of fire.

High power solid state transmitters also require complex combining and tuning networks, whereas a valve based transmitter would use a single relatively simple tuned network.

A thermostatic mixing valve uses a wax pellet to control the mixing of hot and cold water.