Needle valves in design
Needle valve - used as a flow regulator steam, water, gases, liquids. Installed
on the pipelines, process equipment, analytical devices, reactors,
air-conditioning system vehicles. The main part of the valve is a plunger - the
bolt, which control the flow control working environment. During operation of
the valve needle can be changed from fully open to partially open and closed.
Depending on the purpose needle valves vary in design. Some technical
equipment requires smooth flow control, reliable fixation of intermediate
positions. In this case, the needle valve shut-off and regulating, with valve in
the form of a cone. Needle valves are used rosseliruyuschie as managed
regulatory and throttling elements and are mounted on supporting water and steam
pipes. On the lines of injection of cooling water using valves regulating
needle. By direction of the flow valves are
divided: Globe - leaving the body and the inlet stream of the working
environment is one direction. Corner - the direction of flow of the working
environment at the exit from the housing perpendicular to the direction of flow
at the entrance.
