EN 1074-1 & 1074-2 Water Supply Gate Valves | EN 1171 Ductile Iron Gate Valves

At Metalsin, we specialize in manufacturing water supply gate valves that meet the rigorous demands of EN 1074-1, EN 1074-2. They are usually ductile iron gate valves manufactured in accordance with EN 1171. These gate valves, either used above or below ground, are engineered for reliability in potable water systems, industrial pipelines, and municipal infrastructure. Available in resilient-seated (soft sealing) or metal-seated (hard sealing) configurations, these valves feature rising stem or non-rising stem designs to suit diverse operational needs. Built as full-bore valves for minimal flow resistance, they are compatible with flanged, socket, or spigot ends, ensuring seamless integration into existing systems.

EN 1074-1 & EN 1074-2

Ductile iron gate valves made in accordance with EN 1074-1 & EN 1074-2, non-rising stem, resilient seated (rubber encapsulated wedge), PN16 double flanged ends.

EN 1074-1 serves as the foundational standard for gate valves in water supply systems, ensuring they meet stringent safety, durability, and performance criteria. By mandating rigorous material selection (e.g., corrosion-resistant ductile iron), pressure-temperature compatibility (up to PN 25 and 230°C), and leak-tightness testing (at 1.5×PFA or PEA), it guarantees valves withstand operational stresses while safeguarding water quality. The standard enforces design integrity through structural calculations or hydrostatic tests, preventing failures under internal pressure or bending loads. Compliance with EN 1074-1 also aligns valves with EU hygiene and safety regulations, reducing risks of contamination, water loss, and infrastructure downtime. Ultimately, it establishes a universal benchmark for reliability, enabling interoperability across systems and fostering trust in municipal, industrial, and potable water networks.

Rubber-seated ductile iron gate valves, DN600 PN16, with rising stem, meeting requirements of EN 1074-1 & 1074-2.

EN 1074-2 is pivotal for gate valves as it defines specialized requirements for isolating valves in water supply systems, ensuring their reliability in fully opening or closing fluid flow. By mandating rigorous bending resistance tests (e.g., up to 33,000 Nm for DN 500 valves), the standard guarantees structural integrity under pipeline stresses, preventing deformation or leakage. It enforces strict seat tightness criteria, requiring leakage rates ≤ Rate A (resilient seats) or Rate B (metallic seats) under both high (1.1×PFA) and low (0.5 bar) differential pressures, which minimizes water loss and contamination risks. Additionally, endurance testing (250 cycles for manual valves, 2,500 cycles for actuated ones) validates long-term operational reliability, reducing maintenance costs. By complementing EN 1074-1’s general requirements with valve-specific protocols, EN 1074-2 ensures gate valves meet EU regulatory standards, optimize system efficiency, and safeguard potable water quality in municipal and industrial applications.

EN 1171 Ductile Iron Gate Valves

EN 1171 resilient-seated gate valves for water supply with socket ends and non-rising stem (NRS).

EN 1171-compliant ductile iron gate valves are engineered with EN-GJS spheroidal graphite cast iron (e.g., EN-GJS-400-18) for bodies and bonnets, ensuring exceptional strength, impact resistance, and corrosion durability in demanding waterworks applications. The standard defines two pressure rating systems: isobaric series (PN 6 to PN 25) for uniform pressure tolerance across all valve sizes, and isomorphic series (PS 10 bar at DN 40 to PS 1 bar at DN 1000), where allowable pressure decreases with increasing valve size to accommodate large-diameter pipelines. Dimensional compliance is ensured through EN 558 face-to-face measurements and EN 1092-2-aligned flanges, guaranteeing seamless integration with PN 10/16/25 piping systems. Rigorous testing protocols validate performance, including hydrostatic shell strength tests at 1.5×PN/PS (per EN 12266-1) to confirm leak-free operation under extreme pressure, and strength torque validation (Annex B) to verify handles and gearboxes withstand 2–5× the maximum operating torque (MOT), ensuring long-term reliability in manual or automated setups. These specifications collectively ensure EN 1171 valves meet EU regulatory standards while optimizing durability and interoperability in municipal and industrial water networks.

Resilient & Metal Seat | Rising & Non-Rising Stem

Resilient-seated gate valves, designed with elastomeric seals (e.g., EPDM, NBR), prioritize zero leakage (Rate A per EN 12266-1) and are ideal for potable water systems due to their ability to maintain hygiene and tight sealing even at low pressures (≤70°C). Their soft-sealing mechanism ensures minimal water loss and contamination risks, making them perfect for municipal networks and applications requiring strict water quality compliance. In contrast, metal-seated gate valves employ durable metal-to-metal components (e.g., brass) to withstand high temperatures (≤230°C), abrasive fluids, or steam, accepting slightly higher leakage rates (≤ Rate B) for enhanced longevity in industrial settings like chemical processing or thermal plants. While resilient seats excel in low-pressure, clean-water environments, metal seats thrive in harsh conditions, balancing operational demands between precision sealing and rugged durability to optimize reliability across diverse water supply infrastructures.

EN 1171 metal seated gate valves with NRS for waterworks, EN 1074 compliant, ductile iron body & bonnet, handwheel operated, flanged ends, epoxy coating.

EN 1171 ductile iron gate valves for water supply applications are available in rising stem and non-rising stem types. Rising stem gate valves feature a threaded stem that moves up and down as the valve opens and closes, providing a clear visual indication of valve position. These valves are ideal for above-ground installations where space is available, making them easier to inspect and maintain. In contrast, non-rising stem gate valves have a stem that rotates without moving vertically, with the threaded mechanism enclosed inside the valve body. This design is well-suited for underground or confined-space installations, such as buried pipelines or valve chambers, where space constraints prevent external stem movement. Both types are widely used in municipal water distribution, treatment plants, and large-scale industrial water systems, ensuring reliable shutoff and minimal pressure drop.