Sanitary butterfly valve

Abstract

The invention relates to the technical field of valves, discloses a butterfly valve, and particularly provides a sanitary butterfly valve. The sanitary butterfly valve comprises a flange connected to a pipeline. The flange is provided with connecting holes. A valve seat is arranged on the connecting holes. A valve element which is capable of rotating in the valve seat through hinge shafts and can be sealed with the valve seat is arranged in the valve seat. The section of the valve seat is in a circle shape. An annular boss is arranged on the inner face of the valve seat. A valve bush capable of being matched with the valve element is further arranged in the valve seat. The sanitary butterfly valve has the advantages that the annular boss is arranged on the inner face of the valve seat, the valve bush capable of being matched with the valve element is further arranged in the valve seat, and thus the better sealing function can be achieved; the overall structure is more compact through matching of the valve bush and the boss, and meanwhile mounting and dismounting are convenient; the effect that connection of first sealing bodies and second connecting end faces can still achieve the good sealing function after long-time use can be achieved; and meanwhile, the quality of water can be prevented from being affected under any condition through a material adopted by the valve bush.

Description

technical field [0001] The invention relates to the technical field of valves, and refers to a butterfly valve, especially a sanitary butterfly valve. Background technique [0002] A valve is a device used to control the direction, pressure, and flow of a fluid in a fluid system. It is a device that allows the medium (liquid, gas, powder) in the piping and equipment to flow or stop and can control its flow. [0003] The valve is a control component in the pipeline fluid delivery system. It is used to change the passage section and the flow direction of the medium, and has the functions of diversion, cut-off, throttling, check, diversion or overflow relief. Valves used for fluid control range from the simplest shut-off valve to various valves used in extremely complex automatic control systems. Valves for industrial pipelines. It can be used to control the flow of various types of fluids such as water, steam, oil, gas, mud, various corrosive media, liquid metals and radioac...

AI Technical Summary

Problems solved by technology

However, there are corresponding restrictions. For example, in a butterfly valve, if the temperature is too high, it will easily cause some parts to be decomposed, resulting in unqualified water quality in the valve, especially in the sealing link of the valve. After more sealing rings are used, it is easy to The sealing effect is not good and water leaks; after long-term use, the performance of the seal decreases, the disassembly and assembly are cumbersome, and the cost is high. The sealing ring itself decomposes toxic substances in the water when it works at high temperature

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