Manual Cast Iron NBR Flanged Butterfly Valve For Water Supply And Drainage

Flanged Butterfly Valve Description

The flanged butterfly valve has the advantages of small structural length and overall height, fast opening and closing speed, low fluid resistance when fully opened, and sensitive flow control when opened to about 15~17 degrees. The structural principle of flange butterfly valve is most suitable for making large-diameter valves.
Under the following working conditions, butterfly valves are recommended:
1 Throttling, regulating and controlling the flow rate are required;
2 Mud media and media containing solid particles;
3 Where the valve structure length is required to be short;
4 Occasions requiring fast opening and closing speed;
5 Where the pressure difference is small.

Outline And Dimensions

Performance Specification Of Flanged Butterfly Valve

Storage and maintenance

1. When not in use, it should be placed in a dry and ventilated room, and both ends should be covered with dust covers to ensure that the inner cavity of the valve is clean.
2. When stored outdoors for safekeeping, it should be supported, not in contact with the ground, and covered with plastic film for protection.
3. When the valve stored for a long time is reused, check whether the packing fails, and add lubricating oil to each rotating part.
4. During use, the valve should be checked regularly to ensure its normal use, including tightening the valve packing gland nut regularly to compensate the valve stem wear.
5. The valve must be used and maintained within the specified service period, including replacement of gasket, packing, sealing ring, ball (as required) and other sealing pairs.
6. Keeping the working environment of the valve clean can prolong the service life of the valve.

Advantage Of Flanged Butterfly Valve

• Novel design, reasonable, unique structure, light weight, rapid opening and closing.
• Small operating torque, easy to operate, labor-saving dexterity.
• Can be installed in any position, easy maintenance.
• Seals can be replaced, sealing performance is reliable to achieve two-way seal zero leakage.
• Sealing materials, aging resistance, corrosion resistance, long service life and other characteristics.
• The design and manufacture of the rubber lined flange butterfly valve adopts GB12238 standard.

Yuanda Valve Group Co., Ltd., founded in 1994, is headquartered in Yincun, Longyao, Hebei, China, the hinterland of Bohai Economic Rim surrounding Beijing and Tianjin. With a registered capital of RMB 200 million, Yuanda currently has 8 subsidiaries, of which 6 are in China and 2 overseas. Among them, the core company, which covers an area of 540,000m2 and has more than 3500 employees, is the largest high,midium and low-pressure valve manufacturing base specializing in valve development, manufacturing, and sales in China.

Yuanda has obtained DNV·GL, ISO9001: 2015、ISO14001:2015、OHSAS18001:2007, API6D（6D-0759）, CE, KS, and EAC certifications. Its""trademark is evaluated as Famous Trademark of China and Famous Brand in Hebei Province, and the product series produced under"" is a trademark registered in Korea and products produced under this trademark enjoy a good reputation in both international and domestic markets. Yuanda has been named “Credit Management AA-Rating Enterprise” by the General Administration of Quality Supervision, Inspection and Quarantine and granted the title of “China Quality Trustworthy Enterprise” by China Entry and Exit Inspection and Quarantine Association. It is also a holder of Manufacture License of Special Equipment Level A and Casting Certificates Grades B, B1, and B2, and a member of China Valve Association council, a corporate member of China Foundry Association, and a provincial enterprise technology center in Hebei. Yuanda has been granted the power to carry out import and export operations on its own and is an approved supplier of PetroChina (CNPC) and Sinopec, Guodian, Huaneng, Huadian, Datang and China Power, and China Aluminum, CCESCC, Shougang, Wuhan Iron and Steel Company, and Hebei Iron and Steel Company.

Yuanda manufactures to standards including GB/JB(china), ANSI, API, AWWA, DIN, BS, JIS, EAC, NF and so on, and uses HT200, HT250, QT400, QT450, WCA, WCB, WCC, CF3, CF8, CF3M, CF8M, 1Cr5Mo, LCB, among others, to produce a great variety of valves including gate valves, globe valves, ball valves, butterfly valves, check valves, diaphragm valves, pressure-relief valves, plug valves, and traps, which are available in 12 main categories, 200 series and 4000 specs, totaling 120,000 tons a year. These products are widely used in all civil sectors covering petroleum, petrochemical, chemical, power generation, metallurgy, water system, pharmaceuticals, urban construction, and water supply and drainage.