Fluorine lined valves have strong vitality

With the rapid development of modern industry, fluorine lined valves and various pipeline accessories have been rapidly applied and promoted in various fields such as petroleum, printing and dyeing, and chemical industry, demonstrating strong vitality. As a project in engineering, it has attracted great attention and favor from various engineering design and construction units, and is a sunrise product with market potential. The fluorine lined valve has dual functions of switch and flow regulation, which can easily open and close the gas circuit without affecting the flow rate, ensuring the repeatability of the flow rate. Start slowly, reducing the impact of instantaneous pipeline pressure on the instrument. By adding a damper, the service life of the needle valve is greatly improved. Fluorine lined valves are specifically designed to control corrosive or highly corrosive media. The inner surface of the valve body is covered with various fluoroplastics for selection, suitable for different working temperatures and fluid pipelines. They have the characteristics of high strength and good corrosion resistance. Fluorine lined valves are expensive and operate in harsh working environments. They are either toxic and harmful chemicals, or highly corrosive to various acids, alkalis, or organic solvents. Improper use will result in significant economic losses and serious consequences. Proper use and maintenance of valves can extend the service life of fluorine lined valves, prevent various accidents, and ensure the normal operation of pipelines.

Fluorine lined valves, also known as fluorine plastic lined corrosion-resistant valves, are made by placing polytetrafluoroethylene resin (or processed profiles) on the inner wall of steel or iron valve pressure parts (the same method is applicable to the inner lining of various pressure vessels and pipeline accessories) or the outer surface of valve internal parts using its special performance in resisting strong corrosive media to make various types of valves and pressure vessels. Fluorine lined valves use lining technology for all areas within the valve body that can be reached by the medium. The lining material is generally made of fluoroplastics such as FEP (F46) and PCTFE (F3), which can be used in pipelines with various concentrations of sulfuric acid, hydrochloric acid, hydrofluoric acid, aqua regia, and various organic acids, strong acids, strong oxidants, and other corrosive media. However, fluorine lined valves are limited by temperature (only suitable for media between -50 ℃ and 150 ℃). Valves that can be lined with fluoroplastics include fluorine lined butterfly valves, fluorine lined ball valves, fluorine lined globe valves, fluorine lined diaphragm valves, fluorine lined gate valves, fluorine lined plug valves, etc.

Physical structure analysis of fluorine lined check valves

The function of a fluorine lined check valve (also known as a check valve) is to only allow the medium to flow in one direction and prevent flow in that direction. Usually, this type of fluorine lined valve operates automatically, and under the pressure of fluid flowing in one direction, the valve disc opens; When the fluid flows in the opposite direction, the valve seat is cut off by the fluid pressure and the self weight of the valve disc, which acts on the valve seat. Among them, butterfly check valves with internal threads belong to this type of valve, which includes swing check valves and lift check valves. The swing check valve has a hinge mechanism and a valve disc that is like a door, freely leaning against the inclined valve seat surface. In order to ensure that the valve disc can reach the appropriate position on the valve seat surface every time, the valve disc is designed in a hinge mechanism, so that the valve disc has sufficient swing space and makes contact with the valve seat. The valve disc can be made entirely of metal, or it can be embedded with leather, rubber, or synthetic covering on the metal, depending on the performance requirements. When the swing check valve is fully open, the fluid pressure is almost unobstructed, so the pressure drop through the valve is relatively small. The disc seat of the lift check valve is located on the sealing surface of the valve seat on the valve body. Except for the valve disc, which can be freely raised and lowered, the rest of the valve is like a globe valve. Fluid pressure lifts the valve disc from the sealing surface of the valve seat, and the medium reflux causes the valve disc to fall back onto the valve seat, cutting off flow. According to the usage conditions, the valve disc can be an all metal structure, or it can be in the form of a rubber pad or rubber ring embedded on the valve disc holder. Like globe valves, the passage of fluid through lift check valves is also narrow, so the pressure drop through lift check valves is greater than that of swing check valves, and the flow rate of swing check valves is limited very little.