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H44 American standard swing check valve refers to the valve that automatically opens and closes the disc depending on the flow of the medium itself, and is used to prevent the medium from flowing back. It is also called check valve, one-way valve, reverse flow valve, and back pressure valve. The function of this type of valve is to only allow the medium to flow in one direction, and to prevent the flow of the direction. Usually this kind of valve works automatically. Under the action of the fluid pressure flowing in one direction, the valve flap opens; when the fluid flows in the opposite direction, the fluid pressure and the self-coincidence of the valve flap act on the valve seat, thereby cutting off the flow.
H44 American standard swing check valve is suitable for pipelines in various working conditions such as petroleum, chemical, hydraulic, and thermal power stations to cut off or connect to the medium. Applicable media are: water, oil, steam, etc.
Structural features
The product is designed and manufactured in accordance with API 6D design standards, with reasonable structure, reliable sealing and beautiful appearance.
The sealing surface of the valve disc and the valve seat is made of stellite cobalt-based hard alloy surfacing welding, which is wear-resistant, high temperature resistant, good scratch resistance and long service life.
Various piping flange standards and flange sealing surface types can be used to meet various engineering needs and user requirements.
The valve body has a complete variety of materials, and the packing and gasket are reasonably selected according to actual working conditions or user requirements, which can be suitable for various pressure, temperature and medium working conditions.
The disc rotates around the pin outside the valve seat to reduce the violent impact when closing.
The pin shaft and the valve clack are connected with a built-in pin shaft structure, which reduces external leakage points and is more reliable in use.
Reference Standard
Design and manufacturing: API 6D
Structure length: ANSI B 16.10
Flange standard: ANSI B 16.5a
Butt welding end size: ANSI B 16.25
Pressure inspection: API 6D or API 598
American standard swing check valve is also called one-way valve or check valve, its function is to prevent the medium in the pipeline from flowing back. The valve whose opening and closing parts are opened or closed by the flow and force of the medium to prevent the medium from flowing back is called a check valve. Check valves belong to the category of automatic valves, which are mainly used in pipelines where the medium flows in one direction, and only allow the medium to flow in one direction to prevent accidents. This type of valve should generally be installed horizontally in the pipeline.
American standard swing check valve is suitable for nominal pressure PN1.0MPa~42.0MPa, Class150-2500; nominal diameter DN15~1200mm, NPS1/2~48; working temperature -196~540℃ on various pipelines. To prevent the medium from flowing back. Through the selection of different materials (WCB, CF8(M), CF3(M), 1Gr5Mo, 15CrMo1V, it can be applied to water, steam, oil, nitric acid, acetic acid, strong oxidizing media and urea and other media. Mainly used for Petroleum, chemical, pharmaceutical, fertilizer, power and other pipelines.
