EN 1092-2 Flange Drilling for EN 1171 Gate Valves

At Metalsin, we specialize in manufacturing EN 1171-compliant ductile iron gate valves designed for demanding water supply and wastewater treatment systems. Our resilient seated, non-rising stem gate valves are engineered for reliability and longevity, featuring flanged ends meticulously aligned with EN 1092-2 drilling dimensions. This adherence ensures seamless compatibility with pipelines and fittings in water infrastructure projects designed to European standards. By conforming to EN 1092-2 standards, our valves guarantee precise bolt-hole spacing, diameter, and pitch circle alignment—critical for leak-free connections and uniform load distribution under high-pressure conditions. For engineers and project planners, this standardization simplifies installation, reduces maintenance risks, and ensures interoperability with existing systems, making Metalsin valves a trusted choice for modern waterworks seeking compliance, durability, and operational efficiency.

A resilient-seated ductile iron gate valve made to EN 1171, EN 1074-compliant, flanged drilling according to EN 1092-2 24″ PN16, bevel gear operated, with bypass device, supplied to Indonesia.

Both the body and bonnet are typically made from spheroidal graphite cast iron (ductile iron) EN 1563 EN-GJS-450-10. The nominal sizes of these EN 1171 gate valves range from DN 40 to DN 1000. PN 10 and PN 16 are the most widely utilized pressure designations for waterworks applications. The flanged ends, drilled in accordance with EN 1092-2, are integrally cast on both sides of the valve body. Under EN 1092-2, flanged ends with a raised face (RF) feature a slightly elevated sealing surface around the bore. This raised profile—typically 3-5 mm in height—ensures tighter gasket compression when bolted to mating flanges, enhancing leak-proof performance in pressurized water and wastewater systems. The standardized RF design in EN 1092-2 guarantees uniform contact pressure across the sealing area, making it ideal for resilient-seated gate valves where reliable long-term sealing is critical.

PN 10 & PN 16 Flange Drilling Dimensions

EN 1092-2 flange drilling dimensions for ductile iron gate valves. D: outside diameter of flange; d: diameter of raised face; B: nominal bore size; D1: diameter of bolt circle; c: flange thickness; t: height of raised face; n: number of bolt holes; L: diameter of bolt hole. Applicable to both PN 10 and PN 16.