Actuation of the valve closure functions to open and close the de-header valve.

The pump includes an inlet valve driver circuit operable for opening and closing the inlet valve, and an outlet valve driver circuit operable for opening and closing the outlet valve.

Movement of the sleeve allows closure of the valve.

The deluge valve switch is electrically connected to the deluge valve to open and close the deluge valve.

A unique valve mechanism for opening and closing inlet (38) outlet (42), and purge (40) valves in a regenerative incinerator (20) is disclosed.

A torsion spring (14) can close the valve when the field is removed.

A solenoid actuator (70) applies an adjustable force to a movable valve element (44) for closing the outlet valve (26) and opening the inlet valve (24).

Additionally, a valve and an actuator may be provided for opening and closing the valve in response to a controller.

How do I shut off the main water valve to the house?

If the collated codes agree with each other, the solenoid valve can be controlled to open or close the valve.

There is provided a valve comprising a housing (1) and a valve member (2) moveable within the housing (1) to open and close the valve.

The valve actuator assembly is configured to open and close the valve in response to a command signal from a controller.

A drilling parameter such as fluid flow rate is used to actuate the valve, with an increase in flow rate above being effective to open the valve, and a decrease in flow rate tending to close the valve.

The movement of the sliding blind (122) serves to open and close the de-header valve (12), wherein in a closed position, the de-header valve (12) is prepared to receive the resid byproduct feed from the refinery process used to manufacture coke (4).

Two separate control circuits (10, 22) are used for opening and closing the valve.