Sampling valve with fluoroplastic lining

Abstract

The invention discloses a sampling valve with a fluoroplastic lining, and relates to the technical field of valve bodies. The sampling valve with the fluoroplastic lining comprises a sampling bottle,a polytetrafluoroethylene adapter, a fluorine-lined lower cover and a fluorine-lined valve body, wherein the polytetrafluoroethylene adapter is connected into the sampling bottle through a thread; thefluorine-lined lower cover is arranged at the top of the polytetrafluoroethylene adapter; the fluorine-lined valve body is hermetically connected to the two sides of the fluorine-lined lower cover through a flange separately; and a fluorine-lined valve element and a stainless steel upper cover are arranged at the middle part of the top end of the fluorine-lined valve body through a flange sealingsurface. According to the sampling valve with the fluoroplastic lining, through the arrangement for the polytetrafluoroethylene adapter, connection between a branch and a sampling bottle is facilitated; an exhaust thread hole is formed in the side surface of the polytetrafluoroethylene adapter, and timely waste gas collection adopting a manner of connecting a flexible pipe is facilitated, so thatthe personal safety of operating personnel is guaranteed; and the lining of the sampling valve is made from fluoroplastic, resistant to the corrosion of highly hazardous mediums of strong acid, strong base and the like for a long time, and capable of avoiding the pollution of stainless steel to the mediums due to intergranular corrosion.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a fluoroplastic-lined sampling valve. Background technique [0002] In the field of domestic chemical equipment, the current sampling method for high-risk media on pipelines is mainly to control sampling by adding a corrosion-resistant shut-off valve to the pipeline branch. If there is a hidden danger, the process pipeline of this section will be stopped, and then the shut-off valve of the branch circuit will be opened, and a section of material will be connected with a larger special container, then the valve will be closed, and a small amount of sample will be extracted with a small container bottle. [0003] There are many cost and safety problems in this pipeline sampling process: first, if the process pipeline is shut down, the production efficiency will be reduced and the production cost will be increased; second, there will be residual liquid inside after the branch cut-off...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a fluoroplastic-lined sampling valve, which has the advantages of controlling the flow rate, corrosion resistance and aging resistance during the sampling process, and solves the problem of the existing sampling valve in the sampling process. General problems

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