1, the valve is fully rubber-lined butterfly valve structure. This design allows the valve only two parts in contact with the fluid, that is, the valve plate and lining. Thanks to the rubber boot (self-made by KSB® AMRI), the valve body is completely isolated from the fluid. At the same time, due to the special design (spherical contact between the valve plate and the lining), the valve shaft will not come into contact with the fluid. Thanks to this spherical design, the valve plate and the liner can be permanently in spherical contact rather than simple line contact, thus providing a good turn-off effect. At the same time, the design of the rubberized lining structure and its position in the valve body also help to maintain this property permanently. 2, Butterfly opening and closing flexible, no jam, beating, butterfly valve and valve body fully synthetic rubber liner seal, butterfly valve and valve seat closed when closed, and even the butterfly plate in the closing angle of ± 2 to 4 degrees (relative Disc closed angle of 0 degrees), the valve to maintain 100% zero leakage, and disc and seat seal (rubber lining) friction between the small. Normal use, the synthetic rubber lining to ensure good sealing performance under the premise, can withstand 100,000 times the opening and closing operations, thick rubber lining life of up to 18 years on average. 3, the valve for the delivery pipe, valve shaft made of ANSI420 stainless steel. The valve shaft adopts the integral two-shaft structure, that is, the valve shaft is connected with the valve plate by the built-in group key, the valve shaft and the butterfly plate are not connected by pins or bolts, and no screws and nuts are provided, so that the external fluid can be prevented from passing through the screws Or nut into the valve plate. Completely disc and valve linings are the only components in contact with the fluid, the other components are completely dry, so as to eliminate the possibility of electrochemical corrosion of the valve shaft and disc. Valve opening and closing makes smooth and steady. Valve shaft and drive connection platform in line with ISO5211 standards. 4, all the valve shaft seal, by lining the valve shaft at the ball into a spherical shape so that it is processed into a spherical disc with the precise shape, so as to achieve 100% of the shaft does not leak. No need to replace packing or packing, completely maintenance free. All valves are used inside the bearings self-lubricating plain bearings, carbon steel with a full lining of PTFE material. 5, the valve plate material: valves and parts of the material, fully meet the owners of the best needs of the food industry. The butterfly plate made of stainless steel, the overall casting. Valve plate coated with a thickness of 70μ epoxy powder coating. (Depending on the delivery medium, other suitable valve plate materials are available.) Machined into a spherical shape to reduce fluid resistance and improve valve opening. The spherical valve plate fits precisely with the thick rubber lining so that the upstream / Downstream seal up to 100% sealed. Sealing level: ANSI bubble six. 6, the valve body are made of ductile iron. Valves can be connected with either standard flanges and the downstream end can be disassembled. The seal between all valves and the pipe flange is completely sealed by a raised rubber lining at both ends without gasket. For the KSB-AMRI butterfly valve, its connection to the pipe flange (connected at its pressure value Ps) complies with the following standards: - PN6, 10, 16, - AS2129 Table D and E - ANSI B 16-1 125 and B16-5 stage 150, - BS10 Tables D and E - MSS SP44 stage 150, - JIS B 2210-5K, 10K, 16K - AWWA C 207 stages B, D and E. 7, all the castings are cast in France, using the world's most advanced foundry casting valve body and valve plate, compact, smooth surface, without any casting defects. 8, the body lining using KSB-AMRI special formula to enhance the shape of rubber, the material for the health EPDM (through the US FDA certification). The liner has the advantages of low coefficient of friction and high corrosion resistance. The rubber lining also serves as a gasket between the valve and the flange. Liner lip thicker, mainly because the lip is too thin in the valve and the flange when the folder is more vulnerable to damage.