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.
Clutch Packs and Band Servos. The transmission valve body uses the hydraulic fluid to engage a band servo or clutch pack to shift to the necessary gear. A clutch pack consists of discs that are coupled to the side of the engine, and rotate when the engine is running.alves. Valves controlled by the transmission valve body serve a variety of functions. Shift valves, such as the 2-3 shift valve, are responsible for shifting the gear up one level.