This series of metal hard seal butterfly valve is a kind of high performance butterfly valve developed by our company with advanced design technology. Its main characteristics are two - way sealing zero leakage, small opening and closing torque, long service life. The valve installation, operation and maintenance is very convenient, meet the demand of working condition to a great extent, the valve drive can be a variety of configuration: electric, pneumatic, worm gear, etc., and now this series of products have been petroleum, chemical industry, power plants, refineries, city heating pipe network and water supply and drainage system in the industry such as pipeline system is widely used for opening and closing and adjusting device. The main material of this product is WCB, CF8, CF8M, etc. The valve seat sealing surface is made of SiTili hard alloy or stainless steel, and the butterfly plate sealing surface is made of stainless steel/graphite (or rubber asbestos plate) laminated structure. It is used for operating temperature below 350-650℃, and the medium is water, gas, vapor, oil, acid, alkali and granular fluid, etc. The company has established the effective quality assurance system and the necessary physical and chemical inspection, nondestructive testing, pressure testing and other equipment according to the ISO9001 standard, the design, manufacturing technical force is strong, can meet the various special needs of users, such as special materials, special uses (adjustment, steam cleaning, etc.) for users.

1. The design and manufacturing standards are in accordance with JB / T 8527
2. The structure length shall be in accordance with GB / T 12221
3. Flange end dimensions shall be in accordance with GB / T 9113 and JB / T 79
4. The inspection and test of valves shall be in accordance with JB / T 9092
5. Main materials: WCB, CF8, CF8M, CF3, cf3m, wc6, C5, etc