2. It has no connecting rod and bolt, reliable operation and long service life. Can be installed in multiple stations, not affected by the flow direction of the medium.
First, the use:
Electric hard seal butterfly valve is a kind of unsealed butterfly valve, which is widely used in pipelines with medium temperature ≤300℃ and nominal pressure of 0. 1Mpa in the production process of building materials, metallurgy, mining and electric power, and plays the role of connecting, opening and closing or adjusting medium quality.
Second, the structural characteristics:
This butterfly valve is designed and manufactured by welding the midline plate and the short structural steel plate. It is compact in structure, light in weight, convenient to install, small in flow resistance, large in circulation, unaffected by high-temperature expansion and convenient to operate. There are no connecting rods and bolts in the machine body, which is reliable in operation and long in service life. Can be installed in multiple stations, not affected by the flow direction of the medium.
Third, the working principle:
The butterfly valve is driven by the motor to drive the actuator, so that the disc can rotate freely within 90 degrees to achieve the purpose of opening and closing or adjusting the medium flow.
As a kind of components used to realize the opening and closing of pipeline system and flow control, fluorine-lined butterfly valves and rubber-lined butterfly valves have been widely used in petroleum, chemical industry, metallurgy, hydropower and many other fields. In the known butterfly valve technology, the sealing form mostly adopts sealing structure, and the sealing material is rubber, PTFE and so on. Due to the limitation of structural characteristics, it is not suitable for industries such as high temperature resistance, high pressure resistance, corrosion resistance and wear resistance. At present, the more advanced butterfly valve is the triple eccentric metal hard seal butterfly valve. The valve body and the valve seat are connected parts, and the sealing surface of the valve seat is covered with heat-resistant and corrosion-resistant alloy materials. Compared with the traditional butterfly valve, this butterfly valve has the advantages of high temperature resistance, easy operation, no friction when opening and closing, compensation sealing with the increase of torque of transmission mechanism when closing, and improved sealing performance and service life of the butterfly valve. Nominal diameter DN (mm) 50 ~ 2000 Nominal pressure PN(MPa) 0.05 0.25 0.6 Test pressure strength test 0.075 0.375 0.9 Sealing test ≤ 1.5% leakage is suitable for medium gas, dusty gas and flue gas. Suitable for pneumatic and electric temperature transmission.