CI Check Valve

Cast iron check valve is a one-way flow control valve with cast iron as the valve body material. It has the characteristics of low cost and strong corrosion resistance and is widely used in medium and low pressure pipeline systems.

Structural characteristics

Material characteristics: The valve body is made of HT200/HT250 gray cast iron, suitable for non-corrosive media such as clean water and steam with a temperature of ≤250℃;

Sealing design: The surface of the valve disc can be coated with rubber or copper alloy (such as H44T-10 model), and the sealing level reaches ANSI Class VI;

Compactness: Wafer type or flange connection, 30%~40% lighter than cast steel material, suitable for DN50~DN1600 diameter pipelines.

 

ci check valve

 

Selection and installation specifications
‌Key points for selection‌
‌Working condition matching‌: For low-pressure clean water (≤1.6MPa), the swing type is preferred; pump stations prone to water hammer need to be equipped with micro-resistance slow closing type; ‌Seal upgrade‌: For medium containing particles (particle diameter ≤3mm), it is recommended to use copper core valve disc or rubber-coated valve disc (such as Ling Yuxun T-16 model. ‌
Installation requirements‌

The valve body needs to be installed horizontally (except for lifting type), and the flow direction arrow is consistent with the direction of the medium; ‌Large-diameter valves (DN≥300) require independent support frames to prevent pipeline stress from causing valve disc displacement. ‌Maintenance and troubleshooting ‌‌Periodic inspection‌: Check valve disc wear (scratch depth ≤0.1mm) and hinge pin lubrication status every 6 months; ‌Cleaning requirements‌: For working conditions with high impurity content, disassemble and clean the valve cavity every quarter to avoid particles blocking the movement of the valve disc.

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