Flow valve
Flow valves are used in fluid technology ( hydraulics , pneumatics ) to regulate the volume flow of the fluid used ( hydraulic fluid , compressed air ). Other names are flow valve , throttle valve and flow control valve or volume control valve .
Simple flow valves
Due to the increased flow resistance, the volume flow changes depending on the pressure gradient available at the valve.
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Throttle valve | A constant line constriction, the diameter of which is much smaller than the length, is called a throttle valve . The flow rate and pressure drop depend on the viscosity . |
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Orifice valve | An orifice valve, on the other hand, has a line constriction, the diameter of which is much larger than the length. The flow rate and the pressure drop are largely independent of the viscosity. See orifice plate |
Simple flow control valves can also be designed to be adjustable; this is indicated in the symbols shown above by an additional slanted arrow.
Flow control valve
In contrast to a throttle valve, a flow control valve or volume control valve is equipped with pressure compensation . As a result, the set volume flow remains unchanged even if the pressure drop at the valve changes. In ventilation systems it is usually referred to as a volume flow controller or volume flow stabilizer.
Further variants of the flow control valve are the differential pressure volume flow controller and the 2-way flow control valve, in which a brief, unregulated increase occurs when the volume flow is switched on, the start-up jump .
See also
Individual evidence
- ↑ a b Gerhard Bauer: Oil hydraulics. Teubner, Stuttgart 1978, ISBN 3-519-10068-1 .