Product Description
Introduction:
Sanwei's triple-eccentric butterfly valve features an advanced three-offset geometry that completely eliminates rubbing contact between sealing surfaces. The unique conical sealing design with a metal seat ensures zero leakage (Class VI per ANSI/FCI 70-2) while requiring 50% less operating torque than conventional designs.
Standard:
| Structural formation |
Single eccentric structure,Double eccentric structure,Three eccentric structure,Variable eccentric structure |
| Design reference |
GB |
API |
| Driving manner |
Hand-operated,worm wheel&worm screw pneumatic operated,Electric-driving |
| Design standard |
GB/T12238 |
API 609,MSS.SP-68 |
| Face to face |
GB/T 12221 |
ASME B16.10,API609,MSS.SP-68 |
| Flanged ends |
JB/T 79,JB/T 82,GB/T9115 |
ASME B16.5,ASME B16.47 |
| Test&inspection |
JB/T 9092 |
API598 |
Application:
Butterfly valves are suitable for flow regulation. Due to the large pressure loss of the butterfly valve in the pipeline, the firmness of the butterfly plate to withstand the pressure of the pipeline medium when closed should also be considered. In addition, the limitations of the operating temperature to which the elastomeric seat material can be subjected at high temperatures must also be taken into account. The structural length and overall height of the butterfly valve are small, the opening and closing speed is fast, and it has good fluid control characteristics, and the structural principle of the butterfly valve is most suitable for making large-diameter valves. When a butterfly valve is required to be used to control the flow rate, it is important to select the correct size and type of butterfly valve so that it can work properly and effectively.
In general, in throttling, regulation control and slurry media, short structural length and fast opening and closing speed (1/4 revolution) are required. Low pressure cut-off (small pressure difference), butterfly valve is recommended.
Butterfly valves can be used when there is a small amount of leakage into the atmosphere and abrasive medium in the case of double-position adjustment, necked ground channel, low noise, cavitation and gasification, a small amount of leakage to the atmosphere, and abrasive medium.
When the butterfly valve is used under special working conditions, such as throttling adjustment, or strict sealing, or severe wear, low temperature (cryogenic) and other working conditions, it is necessary to use a special butterfly valve with metal seal with adjustment device.
Butterfly valves are suitable for fresh water, sewage, seawater, salt water, steam, natural gas, food, medicine, oil and various acids and alkalis and other pipelines that require complete sealing, zero gas test leakage, high life requirements, and working temperature of -10 degrees ~ 150 degrees.
The soft-seal eccentric butterfly valve is suitable for two-way opening and closing and adjustment of ventilation and dust removal pipelines, and is widely used in gas pipelines and waterways in metallurgy, light industry, electric power, and petrochemical systems.
Metal-to-metal wire sealed double eccentric butterfly valve is suitable for urban heating, gas supply, water supply and other gas, oil, acid and alkali pipelines, as a regulating and throttling device.
In addition to being used as a program control valve for large-scale pressure swing adsorption (PSA) gas separation devices, metal-to-metal sealed triple eccentric butterfly valves can also be widely used in petroleum, petrochemical, chemical, metallurgy, electric power and other fields, and are a good alternative to gate valves and globe valves.
Product Parameters
Parameter
| Size |
DN15 - DN2000 (1/2″ - 80″) |
| Pressure |
PN10 - PN25 (Class 150 - Class 300) |
| Temperature |
-40°C to +200°C |
| Material |
Carbon Steel, Stainless Steel, Alloy Steel, etc. |
| Media |
Water, Oil, Gas, Steam, Corrosive Media, etc. |
| Operation |
Handwheel, Gear, Electric, Pneumatic |
Detailed Photos
Audited Supplier 
){kind=link}