Product Overview
The Ductile Iron Swing Check Valve is designed to automatically prevent reverse flow in water supply, wastewater treatment, irrigation, HVAC, fire protection, and general industrial piping systems.
During normal forward flow, the fluid pressure lifts the disc and allows the medium to pass through the valve. When the flow stops or begins to reverse, the disc automatically returns to the closed position, helping protect pumps, pipelines, and other system equipment from backflow.
The ductile iron body provides good mechanical strength and durability, while the flanged construction ensures secure connection to the pipeline. This valve operates automatically according to the direction of flow and does not require an external actuator.
Product Advantages
● Reliable Non-Return Function: Automatically responds to changes in flow direction.
● Good Mechanical Strength: Ductile iron construction offers greater strength and impact resistance than conventional grey cast iron.
● Low Pressure Loss: The swing-type flow path reduces resistance when the valve is fully open.
● No External Power Required: Self-acting operation simplifies system configuration.
● Convenient Maintenance: The bolted cover allows access to internal components.
● Wide Application Range: Suitable for water and other compatible liquid-service systems.
● Cost-Effective Construction: Provides a practical balance between performance, durability, and cost.
Size Range
● NPS 2″–24″
(DN50–DN600)
Pressure Rating
● PN10 / PN16
Other sizes and pressure ratings can be discussed with the factory according to project requirements.
Standards
● Design and Performance: EN 1074-3
● Inspection and Testing: EN 12266-1
● Flange Connection: EN 1092-2
● Face-to-Face Dimensions: EN 558
● Optional Standards: BS, DIN, or other applicable standards upon request
EN 1074-3 is applicable to check valves used in water-supply systems. Special materials, dimensions, coatings, and technical requirements can be discussed with the factory.
Industry Applications
● Water supply and distribution systems
● Wastewater treatment systems
● Pump outlet pipelines
● HVAC and chilled-water systems
● Fire protection water systems
● Agricultural irrigation systems
● Water treatment plants
● General industrial water pipelines
The suitability of the valve for seawater, drinking water, chemicals, oil, sewage containing solids, or high-temperature media should be confirmed according to the body coating, disc, seat, shaft, working pressure, and operating temperature.
Tianjin Dingliu valve Industry Co., Ltd. is a high-tech enterprise specializing in the valve and automation industry.
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