API butterfly valve is according to the current standard APl 609 design and manufacture a kind of high performance butterfly valve. Using three-dimensional eccentric oblique cone valve seat seal, butterfly plate sealing adopts new type metal embedded put on the butterfly plate and valve seat.Using disc rotating pressure tight seal,so the sealing surface friction small,closed with functions of closed more and more tightly,sealing performance and reliable,soopen to ensure sealing completely out of contact,to ensure the sealing surface is not damaged. 815w, 830w, 860w series of butterfly valve of the main structure characteristics of wafer and flange three eccentric structure, and 815I, 830I series butterfly valve around the main structure characteristics of the valve body with lugs design into a single flange with screw hole structure.
◆Characteristics 1.Appearance of simple structure,small volume light weight,low cost,wide application range; 2,The butterfly valve structure ruled out other types had not seal of faults,and at high temperature can normal use,overcome when used under the condition of high temperature easy leaking defects due to thermal expansion; 3.The butterfly valve in accordance with the requirements of working medium,choose different sealing surface material,to ensure the sealing surface wear resistance,corrosion resistance,scouring long service life.
◆Use API butterfly valve is widely used in metallurgy,electric power,petroleum,chemical,food,medicine,city building water and drainage industry,such as in the line for open/close or adjusting medium flow.
