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The Jiangsu Evergrande magnetic flap level gauges use materials such as 304, 316L, and F46 lining for the valves, depending on the type of medium being measured, thereby enhancing the valves’ corrosion resistance； To accommodate different pressure and temperature conditions, ball valves or needle valves are generally chosen based on the characteristics of each valve: for conditions where the pressure is less than 1.6 MPa and the temperature is below 100°C, stainless steel ball valves are used ； In conditions where the pressure is greater than 1.6 MPa and the temperature exceeds 100°C, stainless steel needle valves are used to enhance compressive strength and sealing performance. For magnetic flap level gauges with PTFE linings, stainless steel ball valves equipped with linings are used to enhance their corrosion resistance. Advantages of ball valve, magnetic flap level gauge, and drain valve: The working principle of a ball valve is to rotate the valve stem in order to open or close the valve. Ball valves are easy to operate, compact in size, and can be manufactured in large diameters. They offer reliable sealing, a simple structure, and are easy to maintain. The sealing surface and the ball surface remain in a closed state, making them resistant to erosion by the medium flowing through them; as a result, they are widely used in various industries. Ball valves and plug valves belong to the same type of valve; the only difference is that their closing element is a sphere, which rotates around the axis of the valve body to enable opening and closing. Ball valves are primarily used in pipelines to shut off flow, distribute it, and change the direction of the fluid flow. Ball valves are a new type of valve that has been widely used in recent years, and they offer the following advantages: ① They have the lowest flow resistance (actually 0) ； ②It does not get stuck during operation (without lubricant), allowing it to be reliably used in corrosive media and low-boiling-point liquids ； ③Complete sealing can be achieved over a wide range of pressures and temperatures ； ④Fast opening and closing can be achieved; the opening and closing time for certain structures is as low as 0.05–0.1 seconds, ensuring their suitability for use in automated systems on test benches. When the valve is opened and closed quickly, the operation is smooth with no shocks ； ⑤The spherical closure element can automatically position itself at the boundary position ； ⑥The working medium is reliably sealed on both sides ； ⑦When in the fully open and fully closed positions, the sealing surfaces of the ball and the valve seat are separated from the medium, so the medium flowing through the valve at high speed does not cause erosion of these sealing surfaces ； ⑧With its compact design and low weight, it can be considered the most suitable valve structure for low-temperature medium systems ； ⑨The valve body is symmetrical; especially in the case of welded valve bodies, it can effectively withstand the stresses applied from the pipes ； ⑩The closing element can withstand the high pressure difference during closing ； ⑾Ball valves with fully welded valve bodies can be buried directly underground, preventing the internal components of the valve from being corroded; their maximum service life can reach 30 years, making them the ideal valves for oil and gas pipelines. Advantages of the needle valve as the drain valve for magnetic flap level gauges: The needle valve is an important component of the instrument’s measurement pipeline system; its function is to open or close the pipeline passage. Pin valves have advantages such as easy installation and removal, secure connections, good fire and explosion resistance, high pressure tolerance, and excellent sealing performance, making them important components in power plants, refineries, and chemical processing facilities. It is a valve that represents an advanced connection method in power plants, refineries, chemical processing units, and instrument measurement pipelines. Pin valves have good sealing performance and a long service life; even if the sealing surfaces are damaged, it is only necessary to replace the wear-prone parts to continue using them. When installing the needle valve, the flow direction of the medium should be consistent with the arrow direction on the valve body. Manual stop valves and ball valves can be installed at any position in the pipeline. A needle valve is a type of valve that allows for precise adjustment and has a wide range of applications. Compared to instrument needle valves, it serves as an important component in instrument measurement pipeline systems; the main types are globe valves and ball valves, whose function is to open or close the flow path in the pipeline. The function of any valve is to stop the flow of fluid. Depending on the type of valve core, they can be classified as globe valves, gate valves, plug valves, ball valves, disc valves, needle valves, and so on. The valve core of a needle valve is a very sharp cone that inserts into the valve seat like a needle, which is where it gets its name. Needle valves can withstand higher pressures than other types of valves and have excellent sealing properties; therefore, they are typically used for sealing gas or liquid media with low flow rates but high pressures. Needle valves work best when used in conjunction with pressure gauges. Generally, needle valves come with threaded connections. For more information, please visit the company’s official website at http://www.yb1518.com/. Please retain this link when reproducing the content! http://www.yb1518.com/uploadfiles/image/2010-11//201011191011384084.jpg