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China Double Eccentric Butterfly Valve Suppliers - SS304 Sealing, D342X Series, Size DN200-DN3000 Factory
| Valve Type: | Eccentric butterfly valve | Structure: | Eccentric |
| Standard: | EN593 | Workmanship: | Investment casting |
| Sealing direction: | Bidirectional | Sealing grade: | Zero leakage |
| Temperature: | -20°C < T < 120°C | Operation: | Handle/Lever |
Characteristics
The eccentric butterfly valve adopting a double eccentric structure design, it has the functions of intercepting, connecting, and regulating flow, which can meet the diverse needs of urban water supply and drainage, building fire protection, metallurgical hydropower and other system pipelines. Its sealing surface is welded with stainless steel material, combined with a dual sealing ring structure, which effectively solves the problem of shaft hole leakage while improving corrosion resistance. The product achieves or exceeds the national standard level in performance indicators through the application of flow field simulation and stress measurement technology.
Advantages
The axis of the valve stem deviates from the center of the sealing surface and the center of the pipeline, causing the butterfly plate to quickly detach or come into contact with the valve seat during the opening and closing process, greatly reducing friction. Significantly reduce the wear of the sealing surface, extend the service life of the valve seat and butterfly plate, especially suitable for frequent operation occasions.
The eccentric structure utilizes the principle of mechanical torque to generate stronger sealing pressure during closure, ensuring a tight seal. It can achieve bidirectional sealing (partially designed), with a leakage level of up to ANSI Class VI (zero leakage), suitable for demanding working conditions.
The eccentric structure allows the use of metal sealing rings (such as stainless steel, hard alloy) instead of traditional rubber soft seals, which can withstand higher temperatures and pressures (commonly up to 200 °C or higher, PN16-PN40 or higher). Can be used for complex media such as steam, gas, corrosive fluids, granular slurries, etc.
Packing
Standard export wooden case packaging
Application Scenarios
The double eccentric butterfly valves are suitable for room temperature clean water, cooling water, circulating water systems, as well as municipal water supply, building pipelines, fire protection pipelines, etc. They are generally suitable for applications with pressure levels of PN1.0-PN1.6MPa.
Frequently Asked Questions
Q1: What are the main benefits of a double eccentric butterfly valve structure?
A1: The double eccentric design allows the disc to detach quickly from the seal during opening, reducing friction, lowering operating torque, and significantly extending the service life of both the seat and disc.
Q2: What standard does this eccentric butterfly valve comply with?
A2: This eccentric butterfly valve is designed and manufactured in accordance with the EN593 standard.
Q3: Can this valve achieve bidirectional zero leakage?
A3: Yes, this valve features bidirectional sealing capability and is designed to achieve zero leakage, meeting demanding industrial sealing standards.
Q4: What is the operating temperature range for this valve?
A4: The valve operates efficiently within a temperature range of -20°C < T < 120°C, making it suitable for room temperature and moderate temperature media.
Q5: What media and systems are best suited for this valve?
A5: It is ideal for clean water, cooling water, circulating water, municipal water supply, building pipelines, and fire protection systems with working pressures of PN1.0-PN1.6MPa.
Q6: What workmanship and materials are used for the sealing?
A6: The valve body is made using investment casting workmanship. The sealing surface is welded with stainless steel and combined with a dual sealing ring structure to prevent shaft hole leakage and optimize corrosion resistance.