The D643H pneumatic sealing butterfly valve pictures with solenoid valve, FRL air source treatment, limit switches, positioners and other aerodynamic components. Our company has developed D643H pneumatic manual butterfly valves, compact, 90 ° rotary switch easy, reliable sealing and long service life, is widely used in water plants, power plants, steel mills, paper, chemicals, food supply and drainage systems, as the regulation and end use. Second, pneumatic manual dual-use butterfly Category 1, according to the structure in the form of classification (1) center sealing butterfly valve (2) Coal single eccentric seal valve (3) double eccentric sealing butterfly valve (4) three eccentric valve seal stamp 2, according to the sealing surface material Category (1) soft sealing butterfly valve. 1) Sealing of soft materials from non-metallic soft nonmetallic materials. 2) Sealing materials from non-metallic rigid metal soft material. (2) metal seal butterfly. Sealing materials from metal to metal hard rigid material. 3, according to the seal in the form of classification (1) mandatory sealing butterfly valve 1) elastic sealing butterfly valve. Sealing pressure when the valve is closed by the valve plate squeeze resilient seat, seat or valve plate to produce 2) external torque sealing butterfly valve. Sealing pressure from external torque generated in the valve shaft (2) pressurized sealing butterfly valve. Sealing pressure from the valve seat or valve plate sealing element pressurized bomb parts produced (3) self-sealing valve. Sealing pressure is automatically generated by the media pressure. Third, the pneumatic valve manual dual-use basis Options Model: D643H diameter: 50 ~ 1200mm Pressure: 0.6MPa ~ 1.6MPa Material: steel, cast iron, stainless steel four, pneumatic manual dual-use product features a butterfly valve, this valve adopts three eccentric structure, have more and more tightly sealed off function, a reliable sealing performance. 2, sealing materials made of stainless steel + asbestos sheet, long service life. 3, stainless steel + asbestos sheet gasket can be located on the body, it can be located in butterfly board, applicable to the different characteristics of the medium, for users to choose. 4, the disc using frame structure, high strength, flow area, flow resistance. 5, the overall paint, can effectively prevent corrosion and replace the seal as long as the seat material, can be used in different media. 6, the valve has a two-way sealing function, when you install from media flow control, are not affected by spatial location can be installed in any direction. 7. The valve structure unique, flexible operation, effort, and convenient. Product Photos: Pneumatic steel butterfly attachment options: Depending on the requirements of the control and select the following accessories: back to the hearing: Also known as limit switches, remote switch signal feedback (optional explosion). Solenoid valve: double acting election two five-pass, two-way single-action selection (optional explosion). FRL: can air regulator, filter, lubricate the cylinder. Hand wheel: turn the hand wheel mechanism can be achieved manually open and close the valve. Electrical locator: 4 ~ 20mA input signal, valve adjustment. Order: This product is factory direct products. For (can be customized), when ordering the special configuration of the detailed description of the following parameters: (example: valve type, drive type, connection type, structure type, nominal pressure, nominal diameter the input signal, the sealing surface material, body material, suitable temperature, whether with attachments) Contact Inquiry ----> determine the price ----> Fax contract ----> contract ----> down payment ----> delivery of products ----> settle payment