Product Overview
The Resilient Seated Flanged Gate Valve provides full-bore shut-off for potable water, wastewater, and municipal networks. Its elastomer-encapsulated wedge seals against the precision-cast body, delivering a bubble-tight, zero-leakage isolation under full operating pressure.
Built with integrated end flanges, the valve ensures robust alignment and structural stability in pipeline networks. The smooth flow path prevents debris build-up and minimizes head loss. Custom flange standards, pressure classes, rubber seats, and protective epoxy coatings can be configured to exact tender requirements.
Key Features of Resilient Seated Flanged Gate Valve
Zero-Leakage Elastomeric Wedge
Encapsulated EPDM or NBR wedge ensures high-resilience sealing and compression recovery under continuous pressure.
Standardized Flanged Connection
Flanged ends conform to EN 1092-2, BS 4504, ANSI B16.1, and JIS B2239 for seamless integration.
High-Strength Ductile Iron Body
Ductile iron construction (QT450-10 / GJS-400-15) offers high tensile strength and pressure containment.
Corrosion-Resistant Stainless Steel Stem
Precision-machined stainless steel stem (SS304/316/420) prevents pitting and ensures smooth operation.
Full-Bore Unobstructed Passage
Fully retractable wedge leaves an unobstructed waterway, lowering friction loss and allowing line pigging.
Fusion-Bonded Epoxy Coating
Internal and external FBE coating protects against corrosion, rust, and fluid contamination.
How Does a Resilient Seated Flanged Gate Valve Work?
The valve controls fluid flow by moving an elastomer-encapsulated wedge perpendicular to the stream via a threaded stem.
Valve Open
The wedge retracts completely into the bonnet, leaving an open waterway for maximum flow and low head loss.
Valve Partially Open
The wedge rests inside the flow path. Gate valves are designed strictly for isolation; continuous operation in a throttling position should be avoided.
Valve Closed
The stem drives the elastomeric wedge into the bottom seat, compressing the rubber to create a complete downstream seal.
Technical Specifications
|
Item |
Specification / Parameter |
|
Product |
Resilient Seated Flanged Gate Valve |
|
Nominal Size |
DN40 to DN1200 (1.5 inch to 48 inch) |
|
Pressure Rating |
PN10 / PN16 / PN25 / Class 150 |
|
Flange Standard |
EN 1092-2, BS 4504, ANSI B16.1, JIS B2239 |
|
Face-to-Face |
EN 558 Series 14 (DIN 3202 F4) / Series 15 (DIN 3202 F5) / BS 5163 |
|
Body & Bonnet |
Ductile Iron (QT450-10 / EN-GJS-400-15) |
|
Wedge Material |
Ductile Iron + EPDM or NBR |
|
Stem Material |
Stainless Steel (AISI 420 / 304 / 316) |
|
Operation |
Handwheel, Square Cap, Gearbox, Electric/Pneumatic Actuator |
|
Protective Coating |
Fusion-Bonded Epoxy Powder, Min. 250 microns |
|
Suitable Media |
Potable Water, Raw Water, Sewage, Neutral Liquids |
|
Testing Standard |
EN 12266-1 / ISO 5208 / API 598 |
|
Documentation |
MTC (EN 10204 3.1), Hydrostatic Test Report, Approval Drawings |
Available Configurations
Nominal Sizes
DN40 through DN1200 for trunk lines and mains.
Pressure Classes
PN10, PN16, PN25, and Class 150.
Flange Standards
EN/DIN, BS, ANSI, and JIS drilling patterns.
Sealing Elastomers
EPDM (potable water compliant) and NBR (raw water and sewage).
Operating Drives
Operating Drives: Handwheel, buried stem cap, gear operator, or automatic actuators.
Epoxy Coating
Standard FBE coating starting at 250 microns with optional extended thickness.
Industries and Applications
Municipal Potable Water Systems
Delivers leak-free shut-off across citywide water mains and distribution networks.
Wastewater Treatment Plants
Provides secure isolation on influent, effluent, and sludge transfer lines.
Water Treatment Facilities
Ensures corrosion resistance across raw water intake, filtration, and pumping units.
Agricultural & Landscaping Irrigation
Offers durable section isolation in main irrigation loops and supply lines.
Industrial Utility Networks
Serves as an isolation solution for industrial cooling systems and utility water lines.
EPC Infrastructure Projects
Meets international engineering specifications for civil, municipal, and regional pipeline tenders.
Quality Control and Inspection
Strict quality protocols are maintained across casting, machining, assembly, and testing.
Material Verification
Chemical composition and mechanical properties verified with EN 10204 3.1 test reports.
01
Dimensional Inspection
Critical dimensions and flange drilling verified against approved drawings.
02
Pressure Testing
100 percent shell hydrostatic and seat tightness testing per ISO 5208 prior to dispatch.
03
Coating Inspection
Thickness testing and holiday pinhole inspection ensure complete coverage.
04
Project Documentation
Standard packages include MTC 3.1, Hydrostatic Test Reports, and Certificates of Origin.
05
Customization and Project Support
Engineering customization and private-label support are available for technical bid specifications.
• Custom face-to-face dimensions and flange drilling.
• Upgraded stem materials, bronze nuts, and stainless steel wedges.
• ISO 5211 top flanges for direct actuator mounting.
• Extension stems and street boxes for buried installation.
• Customized body markings, metal nameplates, and export packaging.
FAQ
Q: What is a resilient seated flanged gate valve?
A: It is an isolation valve using an elastomer-coated wedge to seal against a smooth interior body, featuring flanged ends for pipeline connection.
Q: How does it differ from a metal-seated gate valve?
A: Resilient seated valves use a flexible rubber wedge (EPDM/NBR) to achieve zero leakage without a bottom body pocket, preventing sediment accumulation.
Q: What media can this valve handle?
A: It is suitable for drinking water, raw water, treated wastewater, and non-corrosive industrial fluids within rated temperature limits.
Q: How do I select between EPDM and NBR wedge seals?
A: EPDM is ideal for potable water and clean systems, whereas NBR is recommended for raw sewage or water containing trace oils.
Q: Which flange standards are available?
A: Flanges can be drilled to EN 1092-2, BS 4504, ANSI B16.1, JIS B2239, or AWWA standards upon request.
Q: Can the valve be operated automatically?
A: Yes, valves can be configured with ISO 5211 mounting flanges for electric, pneumatic, or hydraulic actuators.
Q: What quality documentation is provided?
A: Orders include Material Test Certificates (EN 10204 3.1), Hydrostatic Test Reports, Dimensional Reports, and Certificates of Origin.
Q: What details are required for a quotation?
A: Please provide size, pressure rating, flange standard, medium, temperature, actuation preference, and required quantity.
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