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:DN40--DN600

Product Overview

The Resilient Seat DIN Standard Gate Valve PN16 OS&Y DIN3352 F4 (Model 1004M) is a premium ductile iron gate valve engineered for municipal water distribution, wastewater treatment, irrigation, and industrial fluid isolation. Manufactured by Shandong Huaze Valve Co., Ltd. — a specialized valve producer with over 25 years of experience since 1998 — this valve is designed in strict compliance with DIN 3352 F4 and tested per EN 1074-1/-2 standards.

The OS&Y (Outside Screw & Yoke) design keeps stem threads outside the pressure boundary — accessible for lubrication, protected from the fluid medium, and providing clear visual open/closed indication from a distance. The full-bore waterway ensures minimum head loss, no sediment accumulation, and full compatibility with pipeline cleaning pigs.

The entire valve body and bonnet are cast from GGG50 ductile iron (EN-GJS-500-7), offering roughly double the tensile strength and significantly better impact resistance than conventional gray cast iron — critical for buried service and high-cycle municipal duty.

Key Features

Ductile Iron Body & Bonnet (GGG50)

High-strength ductile iron construction (500 MPa UTS / 320 MPa yield) withstands water hammer surges, ground loads, and handling stresses that would fracture gray iron. Extends service life by 2-3x in demanding buried installations.

100% Fusion Bonded Epoxy Coating

Every internal and external surface receives electrostatically applied, oven-cured FBE coating at minimum 250 μm DFT. Spark-tested at 3 kV for pinhole-free coverage. This provides an impermeable corrosion barrier in aggressive soils and treated water — far superior to conventional liquid epoxy paint.

Full-Encapsulation EPDM Wedge

The ductile iron wedge core is fully vulcanized within a seamless EPDM elastomer envelope. Unlike bonded rubber facings that risk delamination, this monobloc design guarantees zero leakage at the seat — cycle after cycle — at full rated test pressure (18 bar) in both directions. EPDM compound is WRAS-compatible for potable water applications.

OS&Y Rising Stem — Visible Safety

Rolled stainless steel SS420/SS431 stem with trapezoidal threads sits entirely outside the pressure envelope. Operators can see gate position at a glance. In-situ lubrication and packing adjustment are possible without shutdown or depressurization — a major maintenance advantage.

Full Bore, Low Head Loss

Smooth, unobstructed flow path with waterway ID matching pipe ID — negligible pressure drop, no sediment pocketing, and full piggability for pipeline maintenance. Lower pumping energy costs across the entire system lifecycle.

Designed for Maintenance

Top-entry bonnet with EPDM gasket allows full disassembly for wedge and seat inspection. Bronze stem nut provides low-friction self-lubrication. Gland packing is adjustable and replaceable under pressure. Every component is serviceable — designed for a 30+ year operating life.

Materials of Construction

Size Range & Connection

Typical Applications

• Municipal Water Distribution Networks
• Potable Water Trunk Mains
• Wastewater & Sewage Treatment Plants
• Sewage Pumping Stations
• Agricultural Irrigation Networks
• HVAC Chilled & Cooling Water Systems
• Fire Hydrant & Sprinkler Supply Mains
• Power Plant Cooling Water Loops
• Oil & Gas Terminal Utility Water Lines
• Mining Dewatering & Process Water Systems

Quality Assurance — 100% Individual Testing

Every single valve undergoes the following tests before release — no batch sampling:

• Shell Hydrostatic Test — 24 bar (1.5 x PN), 60-second hold, zero leakage permitted
• Seat Tightness Test — 18 bar (1.1 x PN), bidirectional, EN 1074-2 Rate A
• FBE Coating Inspection — DFT gauge (min 250 um) + 3 kV holiday spark test, 100% coverage
• Dimensional Verification — Face-to-face, flange OD/PCD/bolt-hole, stem straightness
• Operational Torque Test — Open-Close-Open cycle at or below EN 1074 maximum torque
• Material Certification — EN 10204 3.1 certificates available upon request

Ordering Information

About Shandong Huaze Valve Co., Ltd.

Established in 1998, Shandong Huaze Valve is a specialized manufacturer of industrial and municipal valves with 100-200 skilled employees and an annual production capacity of 300 containers. Our product portfolio spans Gate Valves (DIN, BS 5163, SANS 664, Custom), Check Valves, Air Valves, Globe Valves, Flap Valves, Fire Hydrants, and Strainers — providing a single-source solution for complete valve procurement. ISO 9001 certified, with an annual turnover of USD 5-6 million, we are a financially stable, long-term manufacturing partner you can trust.