BS NRS Rubber Seated Gate Valve c/w Key Operator

Jenis Injap

Resilient Seated Gate Valve

Stem Type

Non-Rising Stem (NRS) 

End Connection

Flanged, Raised Face (RF) / Flat Face (FF)

Saiz Nominal

DN50 – DN600 (2″ – 24″) 

Penilaian Tekanan

PN10 / PN16 / PN25 

Bahan Badan

Ductile Iron / Cast Iron 

Operasi

Handwheel / T-Key / Bevel Gear 

Service Medium

Water / Oil / Gas / General Purpose

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)

Badan

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

Batang

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

Besi mulur

With direction indicator (open/close)

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)

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)

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)