DIN GG25 Stainless Steel Seat PN16 Bellows Sealed Flanged Globe Valve

Introduction

Bellows stop valve, also known as bellows seal stop valve, forms a metal barrier between fluid medium and atmosphere through automatic roll welding to ensure the design of zero leakage of valve stem. Bellows structure is adopted inside the bellows stop valve, and the lower end of the stainless steel bellows is welded on the valve stem to prevent the process fluid from etching the valve stem. The other end is placed between the valve body and the valve cover to form a static seal. Double sealing design is adopted. If the bellows fails, the valve rod packing will also avoid leakage. The bellows is welded to the valve rod to maintain stable operation performance and avoid valve rod vibration caused by valve plug vibration. It is most suitable for pipelines with steam, flammable, explosive, heat transfer oil, high purity, toxic and other media. Features of bellows stop valve: 1. Reasonable product structure, reliable sealing performance and beautiful appearance; 2. The sealing surface is overlaid with Co based cemented carbide, with good wear resistance, corrosion resistance, friction resistance and long service life; 3. The valve rod is subject to quenching and tempering and surface nitriding treatment, with good corrosion and friction resistance; 4. Right angle German standard bellows stop valve has double sealing and more reliable performance; 5. Valve rod lifting position indication, more intuitive; 6. Part material, flange and butt welding number and size can be reasonably selected according to actual working conditions or user requirements to meet various engineering needs

Bellows

In the field of aseptic process industry, "the competition between bellows valve and diaphragm valve" has a long history. For a long time, diaphragm valve has occupied the advantages of simple structure, low price and convenient cleaning and disinfection.

Core components

The key component of Vesta bellows valve is the stop bellows made of tfm1705 PTFE. In addition to resisting the corrosion of various chemical media, tfm1705 material can also be used

Characteristics of bellows stop valve:

1. Double sealing design (bellows + packing) if the bellows fails, the valve stem packing will also avoid leakage and comply with international sealing standards

2. No fluid loss, reduce energy loss and improve plant equipment safety

3. Long service life, reduce maintenance times and reduce operating costs

4. The rugged bellows seal design ensures zero leakage of the valve stem and provides maintenance free conditions

5. PTFE soft sealing material is used for gas medium valve seat to improve the sealing performance of the valve

6. The valve seat with high temperature resistance ≤ 425 ℃ adopts conical hard seal. Achieve air tightness and zero leakage

Main parts and materials

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.