How to control special oil pipelines
How to control the oil special pipe? Let's briefly understand: Valves are used to open and close mechanical devices that may regulate the flow of media in a pipe. There are many types of valves and there are many ways to classify them. If it is distinguished by use, it can be divided into cut-off valve, check valve, dispatch valve, etc.; if it is divided by pressure, it can be divided into vacuum valve (working pressure is less than standard atmospheric pressure), low pressure valve (PN≤1.6MPa), medium pressure valve (PN) =2.5-6.4MPa) and high pressure valve (PN=10-80MPa). If the driving method can be divided into manual valve, power driven valve and automatic valve, there are still classification methods according to the difference of temperature or raw materials. The gate valve is equal to the valve base and the valve plate. The valve plate moves vertically up and down with the valve stem through the hand wheel, thereby cutting or dredging the pipeline, and at the same time...