Introduction of PTFE: in corrosion resistance materials, PTFE has incomparable excellent properties, in addition to molten alkali metals, element fluorine and aromatic hydrocarbons, in various concentrations of hydrochloric acid, sulfuric acid, nitric acid, royal water, organic acid, strong oxide, thick, dilute acid, alkali alternating and a variety of organic solvents, PTFE lining in the valve wall, to overcome the low PTFE material strength, and solve the valve main material corrosion resistance and high cost. In addition, PTFE in addition to the excellent chemical stability, its antifouling, anti-viscosity, static friction coefficient value is very small and similar, reduce friction lubrication performance is good, as a valve open, closed sealing vice, to reduce friction between the sealing surface, reduce the valve operation torque, improve the product service life, its use scope can also be extended to the food, pharmaceutical industry.
Characteristic of PTFE Lined Valve: PFA PTFE Lined Valve products include PFA PTFE Lined Diaphragm Valve, PFA PTFE Lined Check Valve, PFA PTFE Lined Ball Valve, etc., its manufacturing technology includes the formulation of the adhesive and its production process. Adhesive can make the lining glue and pipe wall have a strong affinity, with good resistance resistance and anti-scale performance, long service life and other advantages. Make the valve both metal strength, and corrosion resistance characteristics.
Installation matters: 1. During installation, pay attention should be paid to check whether the valve mark (such as valve type, nominal diameter, pressure grade, material, etc.) complies with the use requirements, and whether the flow direction mark on the shell is consistent with the pipe flow direction.
2. When installation, try to install it horizontally, so that the valve stem is facing up. Prevent the valve skew to install the valve in the natural state, prevent the valve from producing large installation stress due to pipe and support, and the installation lifting shall not be used by the hand wheel for valve lifting.
3. During installation, if the pipe flange sealing surface connected with the fluorinated plastic lining sealing surface at both ends of the valve is metal, the fluorinated plastic sealing gasket shall be added.
4. If the pipe has enough strength to withstand the weight and operating torque of the valve, the valve may not be supported; otherwise, special support points shall be set up for the fluorine lining valve.
5. After installation, the valve shall be in the full open position during the pressure test of the system or pipeline.