Common faults of one-way valve
①The valve disc is broken;
②The medium flows back.
Causes of broken valve discs
The pressure of the medium before and after the check valve is close to balance and "sawing" with each other. The valve disc often slaps against the valve seat. Some brittle materials (such as cast iron, brass, etc.) ) will be broken into pieces.
The preventive method is to use a check valve with a valve disc made of tough material.
Causes of medium backflow
①The sealing surface is damaged;
②The inclusion of impurities. Repairing the sealing surface and cleaning impurities can prevent backflow.
Use and characteristics of double-swing check valve
The function of the swing check valve is to prevent the backflow of the medium in the pipeline. Check valves are automatic valves, and the opening and closing parts automatically open or close by the force of the flowing medium. Check valves are only used on pipelines with one-way flow of media to prevent backflow of media to prevent accidents. The American standard check valves produced by our company are designed and manufactured in accordance with ANSI B16.34 standards. Varieties include: swing check valve, lift check valve, lift vertical check valve;Class 150lB～900Lb;NPS 1"～28" working temperature -40～570℃;valve body materials include: WCB, WC1 , WC6, WC9, C5, CF3, CF8, CF3M, CF8M, etc. Swing check valve is suitable for media: water, steam, oil, nitric acid, strongly oxidizing media and urea, etc. Widely used in power stations, petroleum, chemical, pharmaceutical, food and other industries. It can be used directly with imported equipment. Wafer check valve is suitable for various pipelines with nominal pressure PN1.0MPa～42.0MPa, Class150～2500;nominal diameter DN12～1200mm, NPS1/2～48;working temperature -196～540℃, used to prevent Medium flow back. By choosing different materials, it can be used in various media such as water, steam, oil, nitric acid, acetic acid, strong oxidizing media and urea
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