国产精品片一区二区三区_99麻豆久久久国产免费福利精品_久久露脸国产精品_国产成人精品a_久久久久国产精品熟女影院_成人黄色国产

D973H/Y Electric wafer flange hard seal butterfly valve product description

D973H/Y Electric wafer flange hard seal butterfly valve product features

1, the butterfly valve structure is simple, compact, light weight, easy to install and disassemble, easy maintenance; 
2, the butterfly valve with stainless steel "U" ring, with a certain flexibility in both high temperature and low temperature, All have excellent sealing; 
3, the three-dimensional eccentricity of the butterfly valve, after rigorous calculations, "U" type ring and disc almost no friction, long service life 
4, The sealing surface of the plate is cladded with cobalt-based cemented carbide, and the sealing surface is resistant to abrasion and long service life. 
5, The butterfly valve has a unique structure and the "switch" can be completed by only rotating the valve stem by 90 °. Operation flexibility, convenience, effort, not affected by the level of media pressure, sealing performance and reliable; 
6, high temperature, low temperature, corrosion resistance.

D973H/Y Electric wafer flange hard seal butterfly valve main shape and connection dimensions