EN 12334 Ductile Iron Swing Check Valves

Structural Design

At Metalsin, we supply EN 12334 ductile iron swing check valves (soft seated & metal seated) for waterworks industry. A swing check valve is an automatic valve that allows fluid to flow in one direction while preventing backflow. Its primary components include:

• Valve Body: The main housing that contains all internal components and is made from spheroidal graphite cast iron (ductile iron).
• Disc (Valve Flap): A movable component hinged to the valve body.
• Hinge Pin: The pivot point that allows the disc to swing open or closed.
• Seat: The surface against which the disc seals to prevent backflow.

In operation, when fluid flows in the intended direction, the pressure forces the disc to swing open, allowing flow through the valve. If the flow reverses, the disc swings back onto the seat, effectively sealing the valve and preventing backflow. This design is commonly used in water and wastewater applications due to its simplicity and effectiveness.

Applications in Waterworks

The photo & drawing of a typical ductile iron check valve made to EN 12334.

Ductile iron swing check valves designed & manufactured in accordance with EN 12334 are essential components in waterworks systems, effectively preventing backflow and ensuring unidirectional water flow. In water treatment plants, they safeguard the integrity of the treatment process by preventing treated water from flowing back into the raw water supply. In pumping stations, these valves protect pumps from reverse flow, which can cause damage and reduce efficiency, thereby maintaining optimal pump performance. Within distribution networks, swing check valves are installed at strategic points to prevent backflow into the water supply, safeguarding the system from contamination and ensuring consistent water quality. Their robust construction and reliable performance make them particularly suitable for various water distribution applications.

Technical Specifications

Flanged end connection according to EN 1092-2; Working pressure: PN 10/PN 16; Fusion bonded epoxy coating in accordance with AWWA C550; Pressure tested to EN 12266-1 with PN x 1.1 for seat test and PN x 1.5 for shell test. Working temperature: -10°C~120°C. Depending on the seat rings embedded onto the disc, the swing check valves can be classified as soft seated and metal seated.