Bellows gate valve

design standards

Design and manufacturing: API 602, BS 5352, MSS SP-117, ASME B16.34

Structural length: Socket welded connections and threaded connections as specified by manufacturer

Butt welded connections and flanged connections: in accordance with ASME B16.10

End size: The socket weld end size shall comply with ASME B16.11

Butt weld end size: in accordance with ASME B16.25

Threaded end size: in accordance with ASME B1.20.1

Flange end size: in accordance with ASME B16.5

Structural characteristics: BB. OS & Y/WB. OS & Y

material Materials: in accordance with ANSI/ASME regulations

Inspection and test: according to API 598, API 602

structural characteristics

● Adopt double-layer bellows structure, the valve structure is reasonable and more compact; the installation height of the double bellows gate valve designed and manufactured by our company is 28% to 45.4% lower than similar products;

● Adopt a double-layered bellows structure, the valve reduces the force on the bellows during the opening and closing process, and the force is more uniform, extending its service life;

● Adopt double-layer bellows for more reliable sealing. The valve is leak tested through helium to achieve zero leakage. It is especially used in pipelines with flammable, explosive and highly toxic media, making it environmentally friendly and safe;

● Adopt a double sealing surface wedge sealing structure, which makes the sealing more reliable. For example, under certain working conditions, the sealing surface on one side is damaged, and the sealing surface on the other side is still sealed, ensuring the function of the valve and having a longer service life;

● Adopt a straight-through structure and optimize the flow channel design, with small media flow resistance and large flow coefficient, making it more energy-saving;

● Multi-layer seals such as packing, double bellows and valve stem are used to achieve true zero leakage.

Main Parts & Materials

Body WCB

Valve seat: A105 + D577

Gate: WCB +507 MO

Valve cover: WCB

Valve stem: 1CR13

Filler: flexible graphite

Stem nut: aluminum bronze

Note: Assist customers in selecting specific materials based on their specific media

application scenarios

The multi-layer sealing structure achieves zero external leakage, low torque, maintenance-free, small flow resistance, strong circulation capacity, and good flow characteristics. It is suitable for high temperature, high pressure, and low temperature (cryogenic) power under various conditions. Petrochemical industry, refining, offshore oil, chemical industry and other industries, especially suitable for flammable, explosive, highly toxic and other occasions; It is used as an opening and closing device on pipelines of water, steam, flue gas, oil or mist, powder, particulate and other media. It is especially suitable for opening and closing, cleaning and flushing pipelines in oil transportation and catalytic fission systems in the petrochemical industry. At present, our company's valves have been widely used in various fields such as chemical, petrochemical, petroleum, papermaking, mining, electricity, liquefied gas, food, pharmaceuticals, water supply and drainage, municipal administration, mechanical equipment supporting, electronics industry, urban construction and other fields. Gate valves are generally only suitable for fully opened and fully closed occasions, and cannot be used for adjustment or throttling