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.
Safety Valve â is the term used to describe relief device on a compressible filled vessel. For such a valve the opening is sudden. When the set pressure of the valve is reached, the valve opens almost fully. The difference is generally in capacity and setpoint.