Flow control valve

Abstract

The valve includes the body part and the elastic piston part with bias pressure being added to. The body part has a hole defining the fluid flow channel. The piston part installed in the said channelcan be moved to the body part relatively in order to respond to the difference of fluid pressure across the valve. The piston part defines the annular theittling orifice between the piston part and the hole. The part of the channel possesses a non-homogeneous profile. Thus, the size of the annular orifice is dependent on the related position between the piston part and the body part.

Description

technical field [0001] The present invention relates to a flow control valve that delivers a substantially constant flow of fluid regardless of the pressure differential across the valve. Background technique [0002] For convenience, the invention will be described with particular reference to valves in recirculating hot water radiators for central heating systems, but it should be understood that its use is not limited thereto, and in fact it is generally used extensively in in the fluid system. [0003] In large central heating systems such as in multi-storey office buildings, calibration valves are often used in practice to balance the distribution of fluids. A mains loop keeps hot water pumped from a boiler, usually located in the basement, to the top floor and cycled back and forth. In each level, a secondary duct loop is directly connected to the main loop and feeds a series of radiators connected between the supply and return ducts of the secondary loop. You can a...

AI Technical Summary

Problems solved by technology

[0006] There are several problems with this structure: First, for low and very low flows, the Reynolds number is the Reynolds number in laminar or transition state flow which is variable due to the profile of the adjacent flow , and thus will lack reproducibility

The mechanism of the valve is complex and requires complex manufacturing methods

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