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DIN F5 Socket Ends Resilient Seat Gate Valve PN16 NRS High Performance
| MOQ: | 1 Set |
| Standard Packaging: | Wooden Case |
| Delivery Period: | Two Months |
| Supply Capacity: | 300 Containers / Year |
DIN F5 Resilient Seat Gate Valve
,Socket Ends Resilient Seat Gate Valve
,Socket Ends industrial gate valve
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
Size:DN50--DN300
Product Overview
The DIN F5 Socket Ends Resilient Seat Gate Valve PN16 NRS (Model 1028) is a high-performance, push-fit isolation valve engineered specifically for direct burial in ductile iron water main networks. Unlike conventional flanged gate valves that require flange adaptors, gaskets, bolts, and corrosion-prone bolted joints, the Model 1028 features integral socket ends that accept standard ductile iron pipe spigots directly — dramatically simplifying installation, eliminating bolted flange maintenance, and reducing the valve station footprint. Combined with the DIN F5 long-pattern body, resilient EPDM zero-leakage wedge, NRS mechanism, and 100% FBE coating, this valve delivers reliable, maintenance-free isolation for water distribution networks from DN50 through DN300.
Manufactured by Shandong Huaze Valve Co., Ltd. with over 25 years of specialized valve production expertise, every Model 1028 is individually hydrostatically tested to EN 1074-1/-2 standards. The socket-end configuration aligns with standard ductile iron pipe systems using push-fit (Tyton-type) or mechanical gland joints — the dominant connection method for buried water mains worldwide.
Why Socket Ends? — Rethinking the Valve Connection
Faster Installation
Push the pipe spigot into the socket — done. No flange alignment, no gasket positioning, no bolt torque sequence, no bolt tightening verification. Socket-end valves typically install 3-5x faster than flanged equivalents, reducing crew time and trench open duration.
No Bolted Joints = No Corrosion
Flanged joints in buried service are a leading cause of external corrosion — bolts rust, gaskets degrade, flanges pit. Socket-end push-fit joints eliminate all these failure modes: no bolts, no exposed fasteners, no flange face corrosion under the gasket. The interface is fully protected by the pipe's own external coating and the socket's FBE lining.
Angular Deflection Capability
Push-fit socket joints accommodate up to 3-5 degrees of angular deflection per joint — absorbing minor ground settlement, pipe misalignment, and thermal expansion without transferring stress to the valve body. Rigid flanged connections cannot offer this flexibility, making socket ends the superior choice for buried service in variable soil conditions.
Key Features
Socket Ends — Purpose-Built for Buried Water Mains
The integral socket ends are machined to accept standard ductile iron pipe spigots per EN 545 / ISO 2531 dimensions. Compatible with both push-fit (Tyton-type) gasketed joints and mechanical gland-type restrained joints, the sockets provide a flexible, watertight connection without the complexity of flange adaptors. The socket interior is FBE-coated to the same 250 um standard as the valve body, ensuring the pipe-to-valve interface remains corrosion-protected throughout its service life. For projects specifying restrained joints, the socket design accommodates standard gland and bolt sets without modification.
DIN F5 Long Pattern — Robust Body Geometry
The DIN 3202 F5 (EN 558-1 Series 15) long face-to-face pattern provides an extended body length that delivers several practical advantages in buried installations: a more gradual internal flow path reducing turbulence and local head loss; enhanced structural rigidity to absorb and distribute pipe stress loads; and sufficient body length to accommodate socket depths without compromising internal gate travel clearance. The longer body also provides a larger external surface area for soil friction in buried installations, helping to resist thrust forces where unrestrained push-fit joints are used.
Resilient EPDM Seat — Zero Leakage for Zero NRW
The ductile iron wedge core is fully encapsulated in a seamless, vulcanized EPDM elastomer envelope — a monobloc construction that eliminates the delamination risk of bonded rubber facings. This delivers a bubble-tight bidirectional seal at 18 bar seat test pressure, cycle after cycle. For water utilities targeting non-revenue water (NRW) reduction, the zero-leakage resilient seat at every isolation point directly contributes to measurable water loss savings. The EPDM compound is WRAS-compatible for potable water duty and maintains its elastic recovery across the full 0-52 degree C operating range.
NRS — Compact, Buried-Ready Design
The Non-Rising Stem mechanism encloses the stainless steel SS420/SS431 stem and bronze stem nut entirely within the valve body. The stem maintains a fixed height during operation — no upward travel, no exposed threads, no external moving parts. In a buried installation, this means the valve and its surrounding valve box or surface box occupy a predictable, constant volume. The internal stem threads are continuously lubricated by the line fluid and completely shielded from soil, groundwater, and backfill material — ensuring smooth, low-torque operation even after decades underground without maintenance.
High Performance Ductile Iron Construction
The GGG50 ductile iron (EN-GJS-500-7) body and bonnet provide 500 MPa tensile strength with minimum 7% elongation — double the structural capability of gray cast iron. This material choice is particularly important for socket-end valves in buried service, where the valve body must absorb ground settlement forces, traffic loading transferred through the soil, and occasional water hammer surges — all without the brittle fracture risk that makes gray iron unsuitable for critical buried infrastructure.
100% FBE Coating — Buried-Ready Corrosion Protection
Fusion bonded epoxy applied to all internal and external surfaces — including the socket interior — at minimum 250 um DFT, individually spark-tested at 3 kV. In buried service, where the valve is surrounded by potentially aggressive soil for its entire life, this comprehensive coating is not optional — it is essential. The FBE's chemical bond to the metal substrate prevents underfilm corrosion migration, and the total-coverage philosophy (no uncoated surfaces anywhere) eliminates the weak points that external-only coatings create.
Socket Ends vs Flanged Ends — Application Guide
| Consideration | Socket Ends (Model 1028) | Flanged Ends |
| Pipe Compatibility | Ductile iron spigot (DI pipes) | Flanged pipes or flange adaptors |
| Installation Speed | Fast — push-fit, no bolting | Moderate — requires bolt tightening |
| Joint Flexibility | 3-5° angular deflection | Rigid — zero deflection |
| External Corrosion Risk | Low — no bolts to corrode | Higher — bolts & flange faces at risk |
| Best Application | Direct-burial DI water mains | Above-ground stations & chambers |
| Valve Replacement | Requires cutting pipe or dismantling joint | Unbolt and remove |
Technical Specifications
| Parameter | Specification |
| Design Standard | DIN 3352 F5 (Resilient-Seated Gate Valve, Long Pattern) |
| Face-to-Face | EN 558-1 Series 15 / DIN 3202 F5 |
| End Connection | Socket Ends — Push-Fit for DI Pipe Spigots (EN 545 / ISO 2531) |
| Test Standard | EN 1074-1 / EN 1074-2 |
| Nominal Pressure | PN16 (16 bar / 232 psi) |
| Shell Test | 24 bar (1.5 x PN) |
| Seat Test | 18 bar (1.1 x PN) — Zero Leakage, Bidirectional |
| Body & Bonnet | Ductile Iron EN-GJS-500-7 (GGG50) |
| Wedge | Ductile Iron Core + Full EPDM Encapsulation |
| Stem | Stainless Steel SS420/SS431, Rolled Threads |
| Stem Nut | High-Strength Bronze |
| Stem Type | NRS — Non-Rising Stem |
| Corrosion Protection | 100% FBE, min 250 um DFT, Internal + External + Socket Interior |
| Joint Type | Push-Fit (Tyton-type) and/or Mechanical Gland Restrained Joint |
| Size Range | DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300 |
| Operation | Handwheel; Gearbox for DN200 and Above |
| Media / Temperature | Water, Neutral Oil / 0-52 deg C |
Typical Applications
- Buried Ductile Iron Water Distribution Mains — Direct In-Line Installation
- Municipal Potable Water Networks — Zone & District Isolation Valves
- Water Transmission Pipelines — Rural & Cross-Country Routes
- Irrigation & Agricultural Water Supply — Buried Main Lines
- Fire Hydrant Branch Connections — In-Line Isolation
- Water Pumping Stations — Buried Suction & Discharge Headers
- Reservoir & Tank Connections — Buried Inlet/Outlet Pipework
- Industrial Water Supply — Buried Ring Mains
Quality Assurance
- Shell Hydrostatic Test — 24 bar, 60-second hold, zero leakage
- Seat Tightness Test — 18 bar, bidirectional, EN 1074-2 Rate A
- FBE Coating Inspection — DFT min 250 um + 3 kV spark test, 100% incl. socket interior
- Socket Dimensional Check — Socket bore diameter, depth, and taper verified for DI spigot compatibility
- Operational Torque Test — Full cycle within specified limits
- Material Certification — EN 10204 3.1 certificates available on request
Ordering Information
| Item | Details |
| Model Number | 1028 |
| End Connection | Socket Ends (Push-Fit for DI Pipe) |
| Minimum Order Quantity | 1 Set — Sample and trial orders welcome |
| Packaging | Export-grade plywood cases; socket bores protected with end caps |
| Delivery Time | Approximately 2 months |
| Supply Capacity | 300 Containers / Year |
| Port of Loading | Qingdao, China |
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. Our 100-200 skilled employees produce a comprehensive range: Gate Valves (DIN 3352 F4/F5 — Flanged & Socket Ends, BS 5163, SANS 664, Custom), Check Valves, Air Valves, Globe Valves, Flap Valves, Fire Hydrants, and Strainers. With 300 containers annual capacity and USD 5-6 million turnover, we deliver manufacturing scale with quality consistency — serving water utilities, EPC contractors, and distributors in over 30 countries with competitive pricing, engineering support, and on-time delivery from our Qingdao facility.
