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Double Eccentric Flanged Butterfly Valve - China Suppliers & Factory | Rubber Sealing DN100-DN3000
⚙️ Features
✔Bubble-tight shut-off at full pressure rating
✔Double eccentric design optimizes the seal of the seat retaining ring allowing the disc to seal tightly while retaining the seat in position against high pressure and flow
✔Standardized actuator flange for easy operator interchangeability
✔Top bushing absorbs side thrust loads
✔Hub seal provided by preloaded contact between flatted seat surface and disc hub area for positive sealing at all disc positions
✔Specially engineered seat sealing system adds to longer service life and lower operating torque
✔Molded-in O-rings provides flange sealing and eliminates need for gaskets
✔Universal Mounting Flange — The cast-in actuator flange is universally designed in accordance with ISO 5211 standard dimensions. The mounting flange can accommodate all types of operators such as: gear operators, electric actuators, and pneumatic actuators.
✔Compared with the midline butterfly valve, the double eccentric butterfly valve is more resistant to high pressure, longer life, and good stability KEY ADVANTAGE
🔩 Materials Of Main Parts
| ITEM | PART NAME | MATERIAL |
|---|---|---|
| 1 | Body Material | Ductile iron / CF8 / CF8M / CF3M / WCB |
| 2 | Seat Material | EPDM / NBR / Buna / Viton, Etc. |
| 3 | Stem Material | SS420 / SS410 / SS416 / SS316 / SS304 / Duplex Stainless Steel, Etc. |
| 4 | Disc Material | Ductile Iron Epoxy / CF8 / CF8M / CF3M / Duplex SS / Al-Bronze, Etc. |
| 5 | Gear Box | Ductile Iron / Aluminum |
| 6 | Bushing | PTFE / Bronze |
| 7 | O Ring | NBR / EPDM / VITON |
📋 Valve Standard
| Category | Details |
|---|---|
| Type | Double Eccentric Flanged |
| Face to Face | BS5155, EN558-1 Series 13 & Series 14, ISO5752 Series 13 & Series 14 |
| Flange Drilling | EN1092 PN10 / PN16 / JIS10K / ANSI150 / SANS |
| Mounting Flange | ISO5211 |
| Pressure Rating | PN10 / PN16 / PN25 / 150PSI / 200PSI / Class 150 |
| Application | HVAC, Water Supply & Sewage, Food & Beverage, Chemical/Petrochemical Processing, Power and Utilities, Paper and Pulp, Marine |
📐 Dimensions (mm)
🔍 More Details
❓ Frequently Asked Questions
Q What is a double eccentric (double offset) butterfly valve?
A double eccentric butterfly valve features two offset points in its shaft design — one offset from the disc centerline and one from the pipe bore centerline. This design reduces friction during operation, provides bubble-tight shut-off, and significantly extends service life compared to concentric butterfly valves.
Q What pressure ratings are available for this butterfly valve?
This double eccentric butterfly valve is available in pressure ratings of PN10, PN16, PN25, 150PSI, 200PSI, and Class 150, making it suitable for a wide range of industrial and commercial applications.
Q What body and disc materials are available?
The valve body is available in Ductile Iron, CF8, CF8M, CF3M, and WCB. Disc materials include Ductile Iron Epoxy, CF8, CF8M, CF3M, Duplex Stainless Steel, and Al-Bronze, allowing customization for various media and service conditions.
Q Is this valve compatible with electric and pneumatic actuators?
Yes. The cast-in universal mounting flange is designed in accordance with ISO 5211 standard dimensions, allowing the valve to accommodate all types of operators including gear operators, electric actuators, and pneumatic actuators.
Q What industries and applications is this valve suitable for?
This double eccentric butterfly valve is widely used in HVAC systems, water supply and sewage treatment, food and beverage processing, chemical and petrochemical industries, power generation and utilities, paper and pulp manufacturing, and marine applications.
Q What flange drilling standards does this valve support?
The valve supports multiple international flange drilling standards including EN1092 PN10/PN16, JIS10K, ANSI150, and SANS, ensuring compatibility with global piping systems. Face-to-face dimensions conform to BS5155, EN558-1, and ISO5752 Series 13 and Series 14.