DIN3352 F4 Resilient Seat Gate Valve PN16 NRS Ductile Iron Material

Valves Tested according EN1074-1,-2

Working Pressure:16kg/cm²
Shell Test Pressure:24kg/cm²
Seat Test Pressure:18kg/cm²

Media:Water,Neutral Oil
Working Temperature:0-52°C
100％ Fusion Bonded Epoxy Coating for Inner and Outside Surface

Flange Drilled According to EN1092 PN10,PN16
Size:DN50--DN600

Product Overview

The DIN 3352 F4 Resilient Seat Gate Valve PN16 NRS (Model 1001) is a premium ductile iron gate valve that combines the compact DIN 3352 F4 short-pattern body design with advanced resilient-seat EPDM sealing technology and a space-saving non-rising stem (NRS) mechanism. Engineered for zero-leakage isolation in water supply, treatment, and industrial fluid systems, this valve delivers bubble-tight bidirectional shutoff, exceptional corrosion protection, and decades of low-maintenance service from DN40 through DN600. Manufactured by Shandong Huaze Valve Co., Ltd. — an ISO 9001 certified specialist with over 25 years of valve production — every Model 1001 is individually tested to EN 1074-1/-2 standards.

The Model 1001 represents the resilient-seat configuration within the DIN F4 gate valve family — offering zero-leakage shutoff that metallic seats cannot match. The fully vulcanized EPDM wedge encapsulation creates a monobloc sealing element that eliminates the delamination risk of bonded rubber facings. This, combined with GGG50 ductile iron's structural strength and the 100% FBE coating's corrosion immunity, makes the Model 1001 the definitive choice for water utilities prioritizing non-revenue water reduction and maintenance-free operation.

Key Features

Resilient EPDM Seat — Zero Leakage, Guaranteed

The ductile iron wedge core is completely enveloped in a seamless, vulcanized EPDM elastomer — not surface-bonded, but fully encapsulated. This monobloc construction provides a bubble-tight bidirectional seal at the full 18 bar seat test pressure, cycle after cycle. The EPDM compound is WRAS-compatible for potable water, resists aging and compression set over decades of service, and maintains its elastic recovery properties across the full 0-52 degree C operating range. For water utilities focused on eliminating non-revenue water losses at every isolation point, this zero-leakage capability delivers measurable financial and operational returns.

Ductile Iron Material — The Foundation of Reliability

The entire body and bonnet are cast from GGG50 ductile iron (EN-GJS-500-7) — a material that delivers approximately 500 MPa ultimate tensile strength with minimum 7% elongation. This represents roughly double the structural capability of conventional gray cast iron, with dramatically superior impact resistance and crack propagation resistance. In real-world terms: the valve body absorbs water hammer surges without fracture, withstands ground settlement loads in buried installations, survives handling impacts during transport and installation, and maintains dimensional stability under sustained PN16 pressure loading for decades. Ductile iron is not a cost-saving alternative — it is a performance upgrade that directly extends valve service life.

DIN 3352 F4 — Proven Short-Pattern Design

The DIN 3202 F4 (EN 558-1 Series 14) short face-to-face pattern provides the optimal balance of compact installation length and full flow performance. This is the most widely specified gate valve face-to-face dimension in European and international waterworks projects. Flanges are drilled to EN 1092-2 PN10/PN16 dual-rated pattern, ensuring compatibility with both pressure classes and simplifying inventory management for projects with mixed PN requirements. The short pattern reduces valve station footprint — a meaningful cost advantage in urban installations where space is at a premium.

NRS — Compact Height, Protected Internals

The Non-Rising Stem mechanism keeps the stainless steel SS420/SS431 stem and bronze stem nut entirely within the valve body cavity. The stem height remains fixed during operation — no upward extension. The internal thread mechanism is continuously lubricated by the line fluid and completely shielded from external dirt, grit, moisture, and physical damage. This translates into: (1) smaller valve chamber dimensions and lower civil costs; (2) no exposed stem to clean, grease, or protect; (3) consistent low-torque operation maintained over thousands of cycles; and (4) no risk of stem thread damage during backfilling or construction activities.

100% FBE Coating — Total Corrosion Immunity

Every internal and external surface receives electrostatically applied, oven-cured fusion bonded epoxy at minimum 250 um DFT, individually spark-tested at 3 kV for guaranteed pinhole-free coverage. Unlike liquid epoxy paints that thin at corners and edges, the FBE powder process ensures uniform thickness across all surface geometries. Combined with the inherently corrosion-resistant GGG50 ductile iron substrate and stainless steel internal components, this creates a maintenance-free corrosion protection system engineered for the full service life of the valve — in aggressive soils, treated water, coastal atmospheres, and industrial environments.

Full Bore — Energy-Efficient Flow

The smooth, unobstructed full-bore waterway minimizes turbulence and pressure drop across the valve. Clean bore profile prevents sediment accumulation and is fully compatible with pipeline cleaning pigs. Over a pumping system's 30+ year lifecycle, the cumulative energy savings from low-head-loss isolation valves represent a significant contribution to operational cost reduction — an often-overlooked benefit that rewards specification of full-bore gate valves.

Technical Specifications

Ductile Iron vs Gray Cast Iron — Material Matters

Typical Applications

• Municipal Potable Water Distribution — Trunk Mains & Zone Isolation
• Water Treatment Plants — Finished Water & Process Isolation
• Water Pumping Stations — Suction & Discharge Headers
• Wastewater Treatment — Clean Water & Effluent Lines
• Irrigation & Agricultural Water Supply Networks
• Fire Protection Water Supply — Fire Main & Hydrant Isolation
• Industrial Cooling Water — Power Plants, Refineries, Manufacturing
• Building Services — HVAC, Plumbing Riser, & Fire Standpipe Isolation
• Reservoir & Storage Tank — Inlet, Outlet, & Drain Valves

Quality Assurance

• Shell Hydrostatic Test — 24 bar, 60-second minimum hold, zero leakage from pressure boundary
• Seat Tightness Test — 18 bar, bidirectional, EN 1074-2 Rate A (zero visible leakage)
• FBE Coating Inspection — DFT verification (min 250 um) + 3 kV holiday spark test, 100% coverage
• Dimensional Verification — Face-to-face per EN 558-1 Series 14, flange dimensions, stem alignment
• Operational Torque Test — Full open-close-open cycle within specified limits
• Material Certification — EN 10204 Type 3.1 certificates available on request

Ordering Information

About Shandong Huaze Valve Co., Ltd.

Established in 1998, Shandong Huaze Valve is an ISO 9001 certified manufacturer with over 25 years of specialized valve production serving the global water and industrial markets. Our 100-200 skilled employees produce a comprehensive range of valves — Gate Valves (DIN 3352 F4/F5, EN 558 Series 14/15, BS 5163, SANS 664, Custom), Check Valves, Air Valves, Globe Valves, Flap Valves, Fire Hydrants, and Strainers — all from a single quality-controlled facility. With an annual output of 300 containers and turnover of USD 5-6 million, we deliver the manufacturing capacity, consistent quality, competitive pricing, and on-time delivery that water utilities, EPC contractors, and valve distributors in over 30 countries rely on. Our Qingdao location, adjacent to one of the world's busiest container ports, ensures efficient, cost-effective global logistics.