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Three eccentric multi-level hard seal butterfly valve
Date：2017-04-10
Type：Marine spare parts
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This series of products adopt tri-eccentric inclined-tapering seals that feature low wear during opening and closing, small frictional torque and flexible operation. In addition, as the rotating radius of the tapering butterfly plates is larger than the rotating radius of the seal pair contacts, the tapering butterfly plates will become tighter and tighter upon closing, can realize self locking and prevent butterfly plate over-position.
Butterfly plate seal rings of the valves are overlapped soft and hard metal sheets which have characteristics of both flexible seals and soft and hard multi-layer seals, with sound sealing performance even in corrosive or high temperature conditions.
The structure of three-eccentric metal sealing butterfly valve is shown in the figure
Usually the double-eccentric of butterfly valve likes b (deviating from the pipeline center) and c (deviating from the center line of the sealing face), whose main purpose is to reduce the 15°stroke of the friction between the valve seat and the seal element.Huatong valve with a unique eccentric β (tilt cone) added, which not only overcomes all frictions between the sealing pieces in the opening and closing of the valve element and valve seat so as to increase the service life, but it can also adjust its specific sealing pressure by the changes of plus torque, making it more reliable and free from failure.
Standard Material Specifications
| Suitable temperature | ≤ 120℃ | ≤ 425℃ | ≤ 550℃ | ≤ 550℃ |
| Suitable medinm | Water,Steam,Oil | Weak corrosive media | Corrosive media | |
| Material | ||||
| Body | Code：Q | Code：C | Code：P | Code：R |
| Ductile castiron QT500-7 | Cast steel WCB | Stainless steel CF8 | Stainless steel CF8M | |
| Disc | Ductile castiron QT500-7 | Cast steel WCB | Stainless steel CF8 | Stainless steel CF8M |
| Ringl | Disc ringl：（1Cr13）Seat ringl：Cr13 | Disc ringl：（304；316）Seat ringl：STL | ||
| Shaft | Stainless steel 2Cr13 | Stainless steel 304 | Stainless steel 316 | |
| Packing | Gentle graphite | Gentle graphite； PTFE | ||
Who are we?
SEAFLUID was established in May 2016, the company is located in one of the four ports, economic center of Zhejiang province - Ningbo, the company more than with the domestic and foreign manufacturing, sales, trade platform to maintain good relations of cooperation, to provide customers with a comprehensive spare parts purchasing and custom. Company products are widely used in Marine, industrial, water conservancy and other fields, the product sells in distant markets domestic and foreign, get the consistent high praise in the industry.
Company to customer first business philosophy, in line with service fast, convenient, quality reliable and accurate principle, provide customers with a full range of spare parts purchasing custom architecture.
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