The D343H worm multi-level hard sealing butterfly valve - Product overview butterfly valve because of its compact structure, small size, light weight, easy operation, reliable performance, and maintenance is simple and widely used in thermal pipelines, boiler auxiliary systems, petrochemical and metallurgical industries used to cut or adjust a variety of corrosive and non-corrosive media. Its products at the center line, a single eccentric, double eccentric and eccentric structure. Metal seal butterfly valve an eccentric structure, it is the extension and development of high pressure to areas of generic soft seal butterfly valve, butterfly valve of the original features, it also has anti-aging, engage irradiation, durable, long life, high temperature pressure characteristics of wide application. 
 The D343H worm multi-level hard sealing butterfly valve - Features metal sealing elastic butterfly valve along with the rapid development of science and technology in the world today, its small size, light weight, flexible operation, easy installation, simple structure, erosion resistance, high temperature, etc. The unique charm of attractive style show in the world. Double high elasticity of the metal sealing butterfly valve with its rigorous design, exquisite appearance fashion, full of contemporary and unique acclaimed, its prominent features are as follows: 
 1, rigid full, reliable sealing: In order to eliminate the sensitivity of metal sealing butterfly valve body deformation to increase body rigidity of the valve higher than the national standard valve body, minimum wall thickness of the enterprise design standards and body reinforcement ribs inside and outside to make reasonable arrangement to make it rigid full, thus ensuring the reliability of sealing. 
 Open easily, significantly reduced operating torque curve due to the improved eccentric disc seal tends to be more perfect circle, which would mean that the deformation of the seat more trace, seat the actual amount of deformation is much smaller than the metal elastic range. Thus widening the seat of elastic deformation of redundancy, even at high temperature will not exceed the elastic range of the materials used. 
 In addition, the disc along the pipeline axial move more trace, which will reduce the deformation of the stem along the flow axis Rao song to ensure the accuracy of the stem and the sleeve of the normal contact. Therefore, open easily, the operating torque is far less than other similar butterfly valve products. 
 3. High temperature and advanced welding technology, so that the butterfly valve can reach a broad temperature range, and thus meet the requirements under the conditions of the thermostat and low temperature conditions. 
 4, the use and the inner parts of high hardness materials tend to flow line of the exterior design so that the valve resistant to erosion and long life. 
 The D343H worm multi-level hard sealed butterfly valve - the implementation of the standard design and manufacturing structure length of the flange connection size pressure test GB122389-89 JBT8527-97 GB12221-89 GB/9115-2000, GB/T17241.6-1998 with GB/T13927-92 
 The D343H worm multi-level hard sealing butterfly valve - the main parameters of the valve body material ductile iron valve cover ductile iron valve stem 316L stainless steel pressure levels 1.0Mpa applicable conditions for the medium of water, steam, oil, air, acids, seawater Suitable temperature -40 ~ 200 ℃