TECHNICAL DATA SHEET
British Standard Resilient Seated Non-Rising Stem Gate Valve
- BASIC VALVE INFORMATION
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Item
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Specification
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Valve Type
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Resilient Seated Gate Valve
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Stem Type
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Non-Rising Stem (NRS)
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End Connection
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Flanged, Raised Face (RF) / Flat Face (FF)
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Nominal Size
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DN50 – DN600 (2″ – 24″)
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Pressure Rating
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PN10 / PN16 / PN25
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Body Material
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Ductile Iron / Cast Iron
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Operation
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Handwheel / T-Key / Bevel Gear
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Service Medium
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Water / Oil / Gas / General Purpose
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- APPLICABLE CODES & STANDARDS
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Standard
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Description
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BS 5163-1 / BS 5163-2
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Specification for resilient-seated gate valves for waterworks purposes
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BS 5150
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Specification for cast iron gate valves (flanged and spindle operated)
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EN 558-1
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Face-to-face dimensions for metal valves for use in flanged pipe systems (PN designated)
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BS EN 1092-2
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Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, Part 2: Cast iron flanges
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BS 4504
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Circular flanges for pipes, valves and fittings (PN designated)
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BS 10
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Specification for flanges and bolting for pipes, valves and fittings (Tables D/E)
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BS 6755 / ISO 5208
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Testing of valves – Pressure test requirements
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ISO 7259
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Predominantly key-operated cast iron gate valves for underground use
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WRAS / ACS
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Potable water approval (if required)
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- MATERIALS OF CONSTRUCTION
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Component
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Material
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Standard / Remarks
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|
Body
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Ductile Iron (GGG50) / Cast Iron (GG25)
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EN-GJS-400 / EN-GJL-250
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Bonnet / Cover
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Ductile Iron / Cast Iron
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Same as body
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Gate / Wedge
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Ductile Iron + Fully Encapsulated EPDM/NBR
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100% rubber covered, fusion bonded
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Stem
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Stainless Steel (AISI 304 / 316)
Brass / Bronze (Optional)
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2Cr13 / SS304 / SS316
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Stem Nut
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Brass / Bronze / Ductile Iron
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High strength, wear resistant
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Seat (Body)
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Integral / EPDM bonded
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Rubber molded to body or gate
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O-Rings / Seals
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EPDM / NBR / Viton
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3 O-rings on stem for blowout proof sealing
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Bolting / Nuts
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Stainless Steel / Zinc Plated Carbon Steel
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A2 / A4 Stainless Steel (for corrosion resistance)
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Gasket (Bonnet)
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O-Ring type / Spiral Wound
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Self-sealing design, pressure energized
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Coating
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Epoxy Coating (FBE)
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Internal & external, RAL 5012 (blue) / RAL 5005, certified for potable water
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Handwheel
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Ductile Iron
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With direction indicator (open/close)
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- DESIGN & PERFORMANCE CHARACTERISTICS
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Parameter
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Specification
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Pressure Class
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PN10 / PN16 / PN25 (as specified)
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Working Pressure
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10 bar / 16 bar / 25 bar
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Shell Test Pressure
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1.5 x Rated Pressure (e.g., PN16 → 24 bar)
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Seat Test Pressure
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1.1 x Rated Pressure (e.g., PN16 → 17.6 bar)
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Low Pressure Seat Test
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5–6 bar – Zero leakage
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Design Temperature Range
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-10°C to +80°C (standard EPDM)
-20°C to +120°C (special compounds)
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Leakage Rate
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Zero leakage (Rate A per ISO 5208 / BS 6755)
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Flow Characteristic
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Full bore, linear (on-off service only)
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Operation Torque
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Low torque design (≤80% of standard requirement)
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Stem Sealing
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3 O-rings + Wiper ring – blowout proof, no external leakage
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Direction of Closing
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Clockwise to close (handwheel)
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Position Indication
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Visual indicator on stem / handwheel (open/close)
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- DIMENSIONS & CONNECTIONS
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Item
|
Dimension (mm / inch)
|
|
Flange Standard
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BS EN 1092-2 / BS 4504 / BS 10 Table D/E
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Flange Drilling
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PN10 / PN16 / PN25 drilling (as per EN 1092-2)
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Face-to-Face Length
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EN 558-1 Series 14 (Basic Series 14 for resilient seated gate valves)
Example: DN80 → 203 mm, DN100 → 229 mm, DN150 → 267 mm
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Flange Face
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Raised Face (RF) or Flat Face (FF)
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Overall Height
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Per BS 5163 / Manufacturer standard
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Stem Diameter
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Per BS 5163 Table 4 (minimum requirements)
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Handwheel Diameter
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As per torque requirements
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Weight
|
Approx. _____ kg (depending on size)
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- TESTING & INSPECTION
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Test
|
Standard / Requirement
|
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Shell Test
|
BS 6755 / ISO 5208 – 1.5 x PN – No visible leakage
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Seat Test (High Pressure)
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1.1 x PN – Zero leakage
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Seat Test (Low Pressure)
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5–6 bar – Zero leakage
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Stem Seal Test
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Visual inspection during operation
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Coating Test
|
Holiday detection, thickness measurement (250–300 microns)
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Material Certification
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EN 10204 3.1 / 2.2 (if required)
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WRAS / ACS Approval
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For potable water applications (optional)
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- SPECIAL REQUIREMENTS & REMARKS
- Resilient Seated Design
- Gate is fully encapsulated with EPDM/NBR rubber using injection molding process .
- No exposed metal on gate – ensures 100% bubble-tight shut-off.
- Rubber bonded to ductile iron – no delamination, long service life.
- Non-Rising Stem (NRS)
- Stem does not rise when valve opens/closes.
- Suitable for buried service or limited space installations.
- Stem threads isolated from line media.
- Anti-Corrosion Coating
- Fusion Bonded Epoxy (FBE) coating inside and out.
- Certified for potable water (WRAS / ACS / KTW).
- Color: Blue (RAL 5012) / Black / Custom.
- Blowout-Proof Stem
- Stem retained by shoulder inside body.
- Triple O-ring sealing – no external leakage.
- Zero Leakage Performance
- Resilient seat design ensures tight shut-off even with debris.
- Self-cleaning wedge action.
- Optional Accessories
- T-Key operation (for buried service).
- Extension spindle for deep burial.
- Position indicator / opening limiter.
- Gearbox for larger sizes.
GUATANTEE:
SAVVY VALVES is committed to delivering exceptional product quality and worry-free after-sales service. Our valves are guaranteed to provide a minimum service life of 12 months, during which we will supply all necessary spare parts and detailed maintenance instructions free of charge. Within the warranty period, if any non-human-induced damage occurs, we will replace components at no cost and provide professional technical support. After the warranty expires, customers only need to pay for the cost of spare parts, while still benefiting from discounted maintenance services. Our goal is to help clients reduce operational costs and enhance production efficiency through reliable quality and comprehensive after-sales support. Whether for technical inquiries or maintenance needs, our expert team will respond promptly to ensure your valve system maintains optimal performance at all times.
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