Overview:
Double Eccentric Flange Butterfly Valve adopts eccentric structure for valve plate and sealing ring, which has the features of compact structure, small volume, light weight, reliable sealing, long service life, etc. It is equipped with two functions of regulating and cutting off. Widely used with gold, chemical, electric power, textile, food, medicine, paper and other industrial sectors and municipal engineering, waterworks and other pipelines for tap water, sewage, oil liquids or air, gas, natural gas, water vapour and other media to cut off or pressure, flow control. This series of products are divided into PTFE type valve seat seal and PTFE + metal seal ring valve seat seal structure, sealing leakage level zero leakage; flow characteristics for the approximate equal percentage.
Nominal diameter:
1-1/2"-48"(DN40-DN1200) |
Nominal pressure:
150LB-600LB(PN6-PN100) |
Applicable media: fresh water, sea water, air, chemicals and corrosive media |
| Applicable temperature:-50ºC-200ºC(Ultra-low temperature can be customised) |
Valve body material: carbon steel, stainless steel |
Operation mode: handle, worm gear |
Design and Manufacturing Standards:
GB/T12238/API 609/EN 593/ISO 10631 |
Structure length standard: GB/T 12221/API 609/ASME B16.10/EN 558/ISO 5752 |
Connection flange standard: GB/T 9113/ASME B16.5/ASME B16.47/EN 1092/ISO 7005 |
Features:
1. High-performance regulating cut-off type. That can be used as a control valve, but also can be used as a cut-off valve.
2. Excellent gas and liquid isolation function and flow regulation characteristics.
3. The valve seat opening and closing friction is small, no stagnation, long service life.
4. Easy to replace and adjust the sealing performance of the sealing ring.
5. Low operating torque and reliable torque shut-off.
6. According to the customer's demand, it can be designed into fireproof structure.
| Part Name |
Material |
| Bottom cover screws |
8.8/B7/B8/B8M |
| Bottom cover |
A105/304/316/2205 |
| Gaskets |
304+plumbago/316+plumbago/PTFE |
| Retaining ring |
1035/304/316/2205 |
| Lower bushing |
SF-1/SF-1S/C95200 |
| Body |
WCB/CF8/CF8M/4A |
| Pin |
410/304/316/F51 |
| Butterfly plate |
WCB/CF8/CF8M/4A |
| Seals |
PTFE/RPTFE/PEEK/XTREME |
| See-saw |
A105/304/316/2205 |
| Pressure plate screw |
8.8/B7/B8/B8M |
| Spool |
410/304/316/F51 |
| Upper bushing |
SF-1/SF-1S/C95200 |
| Packing material |
flexible graphite/PTFE/caoutchouc |
| Packing Gland |
WCB/CF8/CF8M/4A |
| Gland studs |
8.8/B7/B8/B8M |
| Gland Nuts |
8.8/B7/B8/B8M |
| Bracket Nut |
8/2H/8M |
| Bracket |
WCB/CF8/CF8M |
Structure:
1. Because of the double eccentric structure, the valve in the process of opening, the butterfly plate gradually detached from the valve seat, reducing the friction between the sealing surface, thus prolonging the service life. The valve seat adopts lip structure design, and the material is made of PTFE, RPTFE or ultra-high molecular weight polyethylene, no matter what the direction of fluid is, the valve seat can always be restored to the original position after deformation, so as to ensure the sealing.
2. Anti-static: Because the valve seat is made of PTFE and other non-metallic materials, the butterfly plate and the valve seat will generate static electricity in the process of opening and closing, and the accumulation of static electricity will generate a potential safety hazard. The limit sleeve structure is adopted to transfer the static electricity on the butterfly plate to the valve body through the limit sleeve, and at the same time, the anti-static bolts are set on the valve body in contact with the ground, so as to achieve the purpose of eliminating the accumulation of static electricity.
We are a company with 20 years of production and sales experience.
We mainly provide safe and reliable API ,JIS ,DIN Standard ball valve, gate valves, globe valves, check valves, fitting flange etc. for pipeline fluids.
We are a company with 20 years of production and sales experience. We mainly provide safe and reliable API, JIS, DIN Standard ball valve, gate valves, globe valves, check valves, fitting flange etc. for pipeline fluids.
Have API6D, CE, ISO certificate.
Our group total have about 300 employees. It is a integrated high-tech enterprise which includes casting and production, export safety process service.
· Casting room: 8 casting line, 20,000 square. 2,000 Ton / Year
· Workshop: 40,000 square meters, 270,000 Valves / Year( Including The automatic production line for flange ball valves 5,000 square, 500 PCS / Day )
· Stock : 30 Millon RMB SS valve
Our main customers are distributors and wholesalers at all levels. The main materials are WCB, CF8, CF8M, CF3, CF3M, Duplex, Brass, cast iron, pressure from 150LB to 2,500LB. PN16 - PN160, 10K, 20K, Caliber 1/2″-40", connection method RF, RTJ, FF, BW, etc.
Mainly we export to Brazil, Chile, Ecuador Vietnam, Turkey, Russian, Ukraine, Peru, Mexico, Romania, Czech Republic and other countries.
Company purpose: To provide reliable, efficient and flexible service, adhere to high quality, low price, fast delivery, professional quality control and good after-sales service attitude! Our goal is to become a reliable supplier of products in the petroleum industry.
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