Compact NRS Rubber Seated Gate Valve c/w Hand Wheel Operator
Compact NRS Rubber Seated Gate Valve c/w Hand Wheel Operator - Image 2

Compact NRS Rubber Seated Gate Valve c/w Hand Wheel Operator

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Description

TECHNICAL DATA SHEET

British Standard Resilient Seated Non-Rising Stem Gate Valve

(英标暗杆橡胶闸阀)

Project: _______________
Tag No.: _______________
Date: _______________

1. BASIC VALVE INFORMATION

Item Specification
Valve Type Resilient Seated Gate Valve
Stem Type Non-Rising Stem (NRS) –暗杆
End Connection Flanged, Raised Face (RF) / Flat Face (FF)
Nominal Size DN50 – DN600 (2″ – 24″) [Specify: ______]
Pressure Rating PN10 / PN16 / PN25 [Specify: ______]
Body Material Ductile Iron / Cast Iron [Specify: ______]
Operation Handwheel / T-Key / Bevel Gear [Specify: ______]
Service Medium Water / Oil / Gas / General Purpose

2. APPLICABLE CODES & STANDARDS

Standard Description
BS 5163-1 / BS 5163-2 Specification for resilient-seated gate valves for waterworks purposes
BS 5150 Specification for cast iron gate valves (flanged and spindle operated)
EN 558-1 Face-to-face dimensions for metal valves for use in flanged pipe systems (PN designated)
BS EN 1092-2 Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, Part 2: Cast iron flanges
BS 4504 Circular flanges for pipes, valves and fittings (PN designated)
BS 10 Specification for flanges and bolting for pipes, valves and fittings (Tables D/E)
BS 6755 / ISO 5208 Testing of valves – Pressure test requirements
ISO 7259 Predominantly key-operated cast iron gate valves for underground use
WRAS / ACS Potable water approval (if required)

3. MATERIALS OF CONSTRUCTION

Component Material Standard / Remarks
Body Ductile Iron (GGG50) / Cast Iron (GG25) EN-GJS-400 / EN-GJL-250
Bonnet / Cover Ductile Iron / Cast Iron Same as body
Gate / Wedge Ductile Iron + Fully Encapsulated EPDM/NBR 100% rubber covered, fusion bonded
Stem Stainless Steel (AISI 304 / 316)
Brass / Bronze (Optional)		 2Cr13 / SS304 / SS316
Stem Nut Brass / Bronze / Ductile Iron High strength, wear resistant
Seat (Body) Integral / EPDM bonded Rubber molded to body or gate
O-Rings / Seals EPDM / NBR / Viton 3 O-rings on stem for blowout proof sealing
Bolting / Nuts Stainless Steel / Zinc Plated Carbon Steel A2 / A4 Stainless Steel (for corrosion resistance)
Gasket (Bonnet) O-Ring type / Spiral Wound Self-sealing design, pressure energized
Coating Epoxy Coating (FBE) Internal & external, RAL 5012 (blue) / RAL 5005, certified for potable water
Handwheel Ductile Iron With direction indicator (open/close)

4. DESIGN & PERFORMANCE CHARACTERISTICS

Parameter Specification
Pressure Class PN10 / PN16 / PN25 (as specified)
Working Pressure 10 bar / 16 bar / 25 bar
Shell Test Pressure 1.5 x Rated Pressure (e.g., PN16 → 24 bar)
Seat Test Pressure 1.1 x Rated Pressure (e.g., PN16 → 17.6 bar)
Low Pressure Seat Test 5–6 bar – Zero leakage
Design Temperature Range -10°C to +80°C (standard EPDM)
-20°C to +120°C (special compounds)
Leakage Rate Zero leakage (Rate A per ISO 5208 / BS 6755)
Flow Characteristic Full bore, linear (on-off service only)
Operation Torque Low torque design (≤80% of standard requirement)
Stem Sealing 3 O-rings + Wiper ring – blowout proof, no external leakage
Direction of Closing Clockwise to close (handwheel)
Position Indication Visual indicator on stem / handwheel (open/close)

5. DIMENSIONS & CONNECTIONS

Item Dimension (mm / inch)
Flange Standard BS EN 1092-2 / BS 4504 / BS 10 Table D/E
Flange Drilling PN10 / PN16 / PN25 drilling (as per EN 1092-2)
Face-to-Face Length EN 558-1 Series 14 (Basic Series 14 for resilient seated gate valves)
Example: DN80 → 203 mm, DN100 → 229 mm, DN150 → 267 mm
Flange Face Raised Face (RF) or Flat Face (FF)
Overall Height Per BS 5163 / Manufacturer standard
Stem Diameter Per BS 5163 Table 4 (minimum requirements)
Handwheel Diameter As per torque requirements
Weight Approx. _____ kg (depending on size)

6. TESTING & INSPECTION

Test Standard / Requirement
Shell Test BS 6755 / ISO 5208 – 1.5 x PN – No visible leakage
Seat Test (High Pressure) 1.1 x PN – Zero leakage
Seat Test (Low Pressure) 5–6 bar – Zero leakage
Stem Seal Test Visual inspection during operation
Coating Test Holiday detection, thickness measurement (250–300 microns)
Material Certification EN 10204 3.1 / 2.2 (if required)
WRAS / ACS Approval For potable water applications (optional)

7. SPECIAL REQUIREMENTS & REMARKS

  1. 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.

  2. 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.

  3. Anti-Corrosion Coating

    • Fusion Bonded Epoxy (FBE) coating inside and out.

    • Certified for potable water (WRAS / ACS / KTW).

    • Color: Blue (RAL 5012) / Black / Custom.

  4. Blowout-Proof Stem

    • Stem retained by shoulder inside body.

    • Triple O-ring sealing – no external leakage.

  5. Zero Leakage Performance

    • Resilient seat design ensures tight shut-off even with debris.

    • Self-cleaning wedge action.

  6. Optional Accessories

    • T-Key operation (for buried service).

    • Extension spindle for deep burial.

    • Position indicator / opening limiter.

    • Gearbox for larger sizes.

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