The D971X electric butterfly valve is categorized in many ways according to different standards, such as by the method of drive.
Electric Butterfly Valve
(2) Pneumatic butterfly valve
(3) Liquid-Driven Butterfly Valve
(4) Manual Butterfly Valve
By structural form:
Center Sealed Butterfly Valve
(2) Single Eccentric Seal Butterfly Valve
(3) Double Eccentric Seal Butterfly Valve
(4) Triple Eccentric Seal Butterfly Valve
Sealing surface material options:
(1) Soft-seated butterfly valve.
1) The sealing pair is composed of non-metallic soft materials against non-metallic soft materials.
2) The sealing pair is composed of metal hard material paired with non-metal soft material.
(2) Metal Hard Seated Butterfly Valve. The sealing pair is composed of metal hard materials against metal hard materials.
By sealing type:
(1) Forced-seal butterfly valve.
1) Elastic Sealing Butterfly Valve: The sealing pressure is generated by the valve plate squeezing the valve seat when the valve is closed, due to the elasticity of the seat or the valve plate.
2) External Torque Sealed Butterfly Valve: The sealing pressure is generated by the torque applied to the valve shaft.
(2) Pressure-sealed butterfly valve: The sealing pressure is generated by pressurizing the sealing elements on the valve seat or valve plate.
(3) Automatic Sealed Butterfly Valve: The sealing pressure ratio is automatically generated by the medium pressure.
By working pressure:
(1) Vacuum Butterfly Valve. Butterfly valve with operating pressure below atmospheric pressure.
(2) Low-pressure butterfly valve. Butterfly valves with nominal pressure PN less than 1.6 MPa.
(3) Medium Pressure Butterfly Valve. Butterfly valves with nominal pressure PN ranging from 2.5 to 6.4 MPa.
(4) High-pressure butterfly valves. Butterfly valves with nominal pressure PN ranging from 10.0 to 80.0 MPa.
(5) Supercritical High-Pressure Butterfly Valve. Butterfly valves with nominal pressure PN greater than 100 MPa.
By working temperature:
High-temperature. Butterfly valves with a temperature of t>450°C.
(2) Medium Temperature Butterfly Valve. Valves with temperatures ranging from 120°C to <450°C.
(3) Room Temperature Butterfly Valve. Butterfly valve with a temperature range of -40°C < t < 120°C.
(4) Low-Temperature Butterfly Valve. Valves for temperatures between -100°C and -40°C.
(5) Temperature Butterfly Valve. Butterfly valves for temperatures up to 100°C.
By connection method:
Butterfly Valve with Clamp Connections
The butterfly plate of the clamp-type butterfly valve is installed in the diameter direction of the pipeline. The valve is in the fully open position.
The butterfly valve features a simple structure, compact size, and light weight. There are two sealing types: elastic sealing and metal sealing. For the elastic sealing valves, the sealing rings can be embedded in the valve body or attached around the butterfly plate.
2. Flanged Butterfly Valve
Flanged butterfly valves feature a vertical plate structure, with the valve stem equipped with an integral metal hard-seated valve seal.
The flexible graphite plate and stainless steel plate composite structure is mounted on the valve body, with the butterfly plate sealing surface surfacing with stainless steel. The soft-seated valve's sealing ring is made of rubber and is mounted on the butterfly plate.
3. Lug butterfly valve
Welded Butterfly Valve
Welded butterfly valves are a non-sealed type of butterfly valve, widely used on pipelines with medium temperatures ≤300℃ and nominal pressure of 0.1Mpa in the production processes of building materials, metallurgy, mining, and electricity industries, for connecting, opening, closing, or regulating the medium flow.
Electric Actuated Butterfly Valves are a type within the categories of electric valves and electric control valves. The main connection methods include flanged and wafer-style, serving as important actuating units in industrial automation control. Two key points for the installation of electric actuated butterfly valves: the installation position, height, and direction of the inlet and outlet must comply with design requirements. Pay attention to ensure that the flow direction of the medium aligns with the arrow direction marked on the valve body, and the connections should be secure and tight.