DIN F5 PN16 NRS Gate Valve Resilient Seated Reliable Performance DIN Standard 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 PN16 NRS Gate Valve Resilient Seated (Model 1027) is a robust, long-pattern gate valve engineered for reliable isolation service in water distribution, treatment, and industrial fluid systems. Built to DIN 3352 F5 — the long face-to-face variant — and featuring a fully encapsulated EPDM resilient wedge, non-rising stem (NRS), and GGG50 ductile iron construction with 100% fusion bonded epoxy coating, this valve delivers zero-leakage shutoff, dependable operation, and extended service life across the DN50 to DN300 size range. Manufactured by Shandong Huaze Valve Co., Ltd. with over 25 years of specialized valve production expertise, every unit is individually tested to EN 1074-1/-2 standards.

The DIN F5 (long pattern) designation is a key differentiator. Compared to the F4 short pattern, the longer face-to-face body provides additional internal space for the gate travel, a more gradual flow transition through the valve, and increased structural rigidity — characteristics valued in larger-diameter installations, high-pressure systems, and applications where pipe stress absorption at the valve connection is desirable. The F5 pattern is widely specified across continental Europe, the Middle East, and markets following DIN/EN standards for waterworks and industrial valves.

Key Features

DIN F5 Long Pattern — Robustness by Design

The DIN 3202 F5 long face-to-face pattern provides a longer body casting with several engineering advantages: a more gradual internal flow transition reduces turbulence and cavitation risk at the valve inlet; the extended body length offers better stress distribution from connected pipework, reducing flange loading; and the additional internal volume accommodates full gate travel with generous clearances. For sizes DN200 and above, the F5 pattern delivers measurable improvements in flow characteristics and mechanical stability compared to the short F4 pattern. Flanges are drilled to EN 1092-2 PN10/PN16 for full interchangeability.

Resilient EPDM Seat — Zero Leakage Shutoff

The ductile iron wedge core is fully vulcanized within a seamless EPDM elastomer envelope — a monobloc construction that eliminates the delamination risk of bonded-on rubber facings. This full-encapsulation design delivers a bubble-tight, bidirectional seal at the full 18 bar seat test pressure. The EPDM compound is WRAS-compatible for potable water service, maintains its elasticity across the 0-52 degree C operating range, and provides excellent resistance to aging, compression set, and chemical disinfectants commonly used in water treatment. For water utilities focused on reducing non-revenue water losses and achieving absolute isolation integrity, the resilient seat is the definitive solution.

NRS — Compact Height, Protected Mechanism

The Non-Rising Stem design encloses the stainless steel stem (SS420/SS431) and bronze stem nut within the valve body, where they remain permanently lubricated and shielded from external contamination. Despite the longer F5 body, the NRS configuration ensures the valve's overall height remains fixed — no stem extension during operation. This is particularly advantageous in below-ground installations where even with the longer body length, the valve chamber dimensions can be optimized for the NRS profile. The precision-rolled trapezoidal threads and self-lubricating bronze nut deliver smooth, low-torque operation that remains consistent over decades of service.

Reliable Performance — Engineered Consistency

Reliability in the Model 1027 is not a claim — it is the product of deliberate engineering decisions at every stage: GGG50 ductile iron for strength and toughness; 100% FBE coating for corrosion immunity; EPDM full-encapsulation wedge for consistent sealing; stainless steel stem for rust-free operation; bronze stem nut for low-friction durability; and 100% individual testing for quality verification. This systematic approach to reliability engineering has made the Model 1027 a trusted choice for water authorities and industrial operators who cannot afford unplanned valve failures or unscheduled maintenance interventions.

Complete Corrosion Protection System

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 pinhole-free coverage. Combined with the inherently corrosion-resistant GGG50 ductile iron substrate and stainless steel internal components, this coating system creates a maintenance-free corrosion barrier that protects the valve through decades of buried service, aggressive soil conditions, and treated water exposure.

Full Bore — Maximum Flow Efficiency

The smooth, unobstructed full-bore waterway — combined with the F5 long pattern's gradual internal flow transition — delivers minimal pressure drop and turbulence across the valve. The clean bore profile prevents sediment accumulation and is fully compatible with pipeline cleaning and inspection pigs. Lower head loss means lower pumping costs over the system lifecycle, making the Model 1027 an energy-efficient choice for continuous-duty isolation applications.

DIN F4 vs F5 — Understanding Face-to-Face Patterns

Technical Specifications

Typical Applications

• Municipal Water Distribution — Trunk Mains & Zone Isolation (Long Pattern Standard)
• Water Treatment Plants — Process & Finished Water Isolation
• Water Pumping Stations — Suction & Discharge Headers
• Wastewater Treatment — Clean Water & Effluent Lines
• Above-Ground Valve Stations & Manifolds
• Irrigation Distribution Networks — Main Line Isolation
• Fire Protection Water Supply — Fire Main & Hydrant Feeds
• Industrial Cooling Water — Power Plants & Process Industries
• Building Services — Commercial HVAC & Plumbing Riser Isolation

Quality Assurance

• Shell Hydrostatic Test — 24 bar, 60-second 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 — F5 face-to-face length, flange dimensions, stem alignment, handwheel fit
• Operational Torque Test — Full open-close-open cycle within specified torque limits
• Material Certification — EN 10204 Type 3.1 certificates available for all pressure-containing components

Ordering Information

About Shandong Huaze Valve Co., Ltd.

Established in 1998, Shandong Huaze Valve is an ISO 9001 certified specialist manufacturer with over 25 years of continuous valve production. Our 100-200 skilled employees produce a comprehensive range including Gate Valves (DIN 3352 F4/F5, 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, quality consistency, and competitive pricing that water utilities, EPC contractors, and distributors in over 30 countries depend on. Located in Qingdao with direct port access, we ensure efficient global logistics for projects of any scale.