Knowledge about flow regulation of fluorine-lined globe valve!

by:Lianke Valve     2022-08-29
Knowledge about flow regulation of fluorine-lined globe valve! The fluorine-lined globe valve is a very widely used valve, and its advantages are closely related to its popularity. The fluorine-lined globe valve has small friction between the sealing surfaces during the opening and closing process, is more durable, has a small opening height, is easy to manufacture, and is convenient to maintain. It is not only suitable for medium and low pressure, but also suitable for high pressure. Its closing principle is that relying on the pressure of the valve stem, the sealing surface of the valve disc and the sealing surface of the valve seat are closely fitted to prevent the flow of the medium. Fluorine-lined globe valves are generally suitable for conveying liquid and gaseous media under various pressure and temperature conditions within the specified standard range, but are not suitable for conveying liquids containing solid precipitation or precipitation crystals. Check valves can be used in most media process systems. Various forms of fluorine-lined globe valves have been developed to meet various uses in petrochemical, electric power, metallurgy, urban construction, chemical and other sectors. The sealing surface is not easy to be worn and scratched, and the sealing performance is good. When the fluorine-lined globe valve is opened and closed, there is no relative sliding between the disc and the sealing surface of the valve body, so the wear and abrasion are not serious, the sealing performance is good, and the service life is long. The sealing surface area is small and the structure is relatively simple. The man-hours required to manufacture the sealing surface and the precious materials required for the sealing ring are less than those of the gate valve. When opening and closing, the valve disc travel is small, so the height of the fluorine-lined globe valve is smaller than that of the gate valve, but the structural length is longer than that of the gate valve. The opening and closing torque is large, the opening and closing is laborious, and the opening and closing time is long. The fluid resistance is large, because the medium channel in the valve body is tortuous, the fluid resistance is large, and the power consumption is large. Not suitable for media with particles, high viscosity and easy coking. Poor adjustment performance. The flow direction of the medium of the fluorine-lined globe valve, when the nominal pressure PN≤16MPa, generally adopts the downstream flow, and the medium flows upward from the bottom of the valve disc; when the nominal pressure PN≥20MPa, generally adopts the countercurrent flow, and the medium flows downward from the top of the valve disc. to increase seal performance. When in use, the medium of the fluorine-lined globe valve can only flow in one direction and cannot change the flow direction. It is suitable for various concentrations of aqua regia, sulfuric acid, hydrochloric acid, hydrofluoric acid and various organic acids, strong acids and strong oxidants at -50℃~150℃. FEP is also suitable for various concentrations of strong alkali organic solvents and other corrosive It is used on pipelines of gas and liquid medium.
Many of us have heard about valve application and seen some of these units in operation in types of industrial valves, types of industrial valves and types of industrial valves spaces.
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