1, the fluid resistance is small, the sealing surface is brush and erosion of the medium is small. 2, less effort to open and close. 3, the medium flow is not limited, does not disturb the flow, does not reduce the pressure. 4, simple shape, short structure length, good manufacturing process, wide range of application.

The materials used are as follows:
Polytetrachloroethylene PTFE(F4) use medium: strong acid, strong base, strong oxidant, etc. Use temperature: -200~180 Features: excellent chemical stability, high heat resistance, cold resistance, low friction coefficient, is an excellent self-lubricating material, but the mechanical properties are low, poor fluidity, large thermal expansion. Polyvinylidene chloride PVDF(F2) Use medium: resistance to most chemicals and solvents, use temperature: -70~100 Characteristics: pull strength and compression strength is better than F4, bending resistance, weather resistance, radiation resistance. Light resistance and aging, the biggest special point is good toughness, easy to form. Polyolefin: PO Applicable media: various concentrations of acid, alkali and salt and some organic solvents. Use temperature: -58~80 Features: is currently the world's most ideal anti-corrosion material, has been widely used in rotary molding of large equipment and pipeline lining. Polyperfluoroethylene FEP (F46) Applicable media: any organic solvent or reagent, dilute or concentrated no machine acid, base, ketone, aromatic, chlorinated hydrocarbons, etc. Use temperature: -85~150 Characteristics: mechanical, electrical and chemical stability are basically the same as F4, but the outstanding advantage is high dynamic toughness, excellent weather resistance and radiation. Polytrifluoroethylene PCTEF (F3) Applicable media: various organic solvents, inorganic corrosive fluids (oxidizing acids) Use temperature: -195~120 Characteristics: heat resistance, electrical properties and chemical stability second only to F4, mechanical strength, creep properties, hardness than F4 better polypropylene: RPP applicable media: Aqueous solution of inorganic salts, dilute or concentrated solution of non-organic acids and bases. Use temperature: -14~80 Features: one of the lightest plastics, its yield, tensile and compressive strength, hardness are better than low pressure polyethylene, has a very outstanding rigidity, good heat resistance, easy to form, excellent. After modification, dynamic impact, fluidity, bending elasticity. PVC applicable media: water resistance, concentrated alkali, non-oxidizing acid, chain hydrocarbon, oil and ozone. Use temperature: 0-55 Features: high mechanical strength, excellent chemical stability and dielectric properties, oil resistance and aging resistance is also good, easy to fuse and bond, low price.
Fluorine-lined gate valves with fluorine-lined valves have the following advantages:
Light weight: the body is made of advanced ball black cast iron, the weight is reduced by about 20% to 30% compared with the traditional gate valve weight, easy installation and maintenance. Flat-bottom gate seat: The traditional gate valve is often after the water washing pipe because of foreign objects such as stones, wood blocks, cement, iron debris, debris and other sludge in the bottom groove of the valve, easy to cause the formation of water leakage phenomenon, elastic seat sealing gate valve bottom with the same flat bottom design of the pipe machine, not easy to cause debris deposition, so that the fluid is unimpeded. The whole package: the ram adopts high-quality rubber for the whole inner and outer rubber, and the first-class rubber vulcanization technology in Europe makes the vulcanized ram ensure the precise geometric size, and the rubber and the ductile cast ram are then reliable, not easy to fall off and have good elastic memory. Water precision casting valve body: The valve body is precision cast, and the precise geometry allows the valve body to be sealed without any finishing.