Human Immunodeficiency Virus, commonly known as HIV, is a virus that affects the immune system by destroying white blood cells known as CD4 cells. These cells are responsible for fighting disease.
Servovalve, Hydraulic-Description. A hydraulic servovalve is a servo (see Servo, Hydraulic â Description) with a device (either flapper nozzle or jet pipe) used to position the servo. The term electrohydraulic servovalve is often used because servovalves are controlled through an electrical signal.
Diaphragm valves (or membrane valves) consists of a valve body with two or more ports, a diaphragm, and a weir or saddle or seat upon which the diaphragm closes the valve. The valve is constructed from either plastic or metal. Originally, the diaphragm valve was developed for use in industrial applications.