D743H/Y hydraulic hard seal butterfly valve is a new type of multi-level metal hard seal butterfly valve with strong applicability, which adopts the combination of hydraulic actuator and flanged hard seal three partial core butterfly valve, precise J-shaped elastic sealing ring and three eccentric multi-level metal hard seal structure, and is widely used in industrial pipelines with medium temperature ≤ 425℃ such as gold, electric power, petrochemical industry, as well as drainage and municipal construction, for regulating flow and carrying off fluid. It is widely used in the industrial pipelines of gold industry, electric power, petrochemical industry, water supply and drainage, and municipal construction, etc., for regulating the flow and carrying off the fluid. The valve adopts three eccentric structure, the valve seat and disc sealing surface are made of different hardness and stainless steel, has good corrosion resistance, long service life, the valve military mail two-way sealing function, the product conforms to the national GB/T13927-92 valve pressure test standards. Hydraulic butterfly valve hydraulic actuator as a power source, through the bidirectional gear pump output pressure oil, through the control of the oil circuit integration block sent to the cylinder, to realize the piston reciprocating motion, while through the crank rotation of the valve shaft, the valve plate for the 90-degree range of rotation, to regulate the flow rate of the purpose. Widely used in metallurgy, mining, electric power, building materials, medicine, chemical industry and other industries in the production process, the flow of media in the pipeline can be remote control or on-site control.

Product features: bi-directional zero leakage, reliable sealing, can be used in high vacuum systems; self-tightening seal, ultra-low torque, open and close quickly and labor-saving; simple structure, small size, easy maintenance, easy to install; long service life, suitable for frequent switching and durability; with extended precision composite bearings and stem anti-punch-out safety design.