Economy Pattern Rubber Seated NRS Gate Valve
Description
Technical Data Sheet
British Standard Resilient Seated Gate Valve (Non-Rising Stem) with Compact Body
1. Product Overview
Product Name: British Standard Resilient Seated Gate Valve (Non-Rising Stem)
Body Type: Compact Body / Short Pattern
Model Series: Z45X / 616 / BS5163 Series
Operation: Manual (Handwheel or Square Nut)
Connection: Flanged Ends
Application: Designed for isolating or connecting media flow in pipelines. Suitable for water, sewage, oil, and non-corrosive fluids. The non-rising stem design is ideal for installations with limited space, such as valve pits or underground chambers.
2. Design & Compliance Standards
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Design & Manufacture: BS 5163 / BS 5150
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Face-to-Face Dimension: BS 5163 Short Series / EN 558-1 (Series 14 for PN10/16)
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Flange Drilling Standard: BS 4504 / EN 1092-2 (PN10/PN16)
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Inspection & Testing: BS 6755 / EN 12266-1
3. Basic Technical Specifications
| Parameter | Specification |
|---|---|
| Nominal Diameter | DN50 ~ DN600 (2″ ~ 24″) |
| Nominal Pressure | PN10 / PN16 |
| Shell Test Pressure | 1.5 × PN (e.g., PN16 = 24 bar / 2.4 MPa) |
| Seal Test Pressure | 1.1 × PN (e.g., PN16 = 17.6 bar / 1.76 MPa) |
| Operating Temperature | 0°C ~ 80°C (Depending on media and rubber material) |
| Suitable Media | Potable water, raw water, sewage, seawater, oils, and mildly corrosive fluids |
| Operation Type | Handwheel or Square Cap (for T-wrench operation) |
4. Main Component Materials
| Component | Material |
|---|---|
| Body | Ductile Iron (GGG50 / EN-GJS-500-7) |
| Bonnet | Ductile Iron (GGG50 / EN-GJS-500-7) |
| Wedge / Gate | Ductile Iron, Fully Encased in Rubber (EPDM / NBR) |
| Stem | Stainless Steel (2Cr13 / AISI 420 / AISI 304) |
| Stem Nut | High-Strength Brass (CuZn40Pb2) / Bronze |
| Seals / O-Rings | NBR (Nitrile) or EPDM (Ethylene Propylene Diene Monomer) |
| Bolts / Nuts | Carbon Steel Zinc Plated / Stainless Steel |
| Handwheel | Ductile Iron / Malleable Iron |
| Coating | Internal & External Fusion Bonded Epoxy Coating per DIN 3476. Min Thickness: 250μm (Color: Blue RAL 5017 or as specified). |
5. Dimension Table (Compact Body – PN16)
Note: Due to variations in “compact” designs among manufacturers, the following are reference dimensions based on BS5160 short pattern. Verification with the specific manufacturer’s datasheet is recommended.
| DN (mm) | Length L (mm) | Flange Dia. D (mm) | Bolt Circle Dia. D1 (mm) | Bolt Holes (Quantity – Dia.) |
|---|---|---|---|---|
| 50 | 178 | 160 | 125 | 4-Φ18 |
| 65 | 190 | 180 | 145 | 4-Φ18 |
| 80 | 203 | 195 | 160 | 8-Φ18 |
| 100 | 229 | 215 | 180 | 8-Φ18 |
| 150 | 267 | 280 | 240 | 8-Φ22 |
| 200 | 292 | 335 | 295 | 8-Φ22 (PN10) / 12-Φ22 (PN16) |
| 250 | 330 | 405 | 355 | 12-Φ26 |
| 300 | 356 | 455 | 410 | 12-Φ26 |
6. Product Features & Benefits
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Compact & Lightweight: The short face-to-face dimensions reduce installation space, weight, and support requirements compared to traditional long-pattern valves.
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Bubble-Tight Shut-Off: The wedge is fully encapsulated with precision-molded rubber, ensuring excellent sealing performance and bidirectional zero-leakage shut-off.
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Corrosion Resistance: The ductile iron body is protected inside and out with a fusion-bonded epoxy coating, preventing corrosion and protecting water quality.
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Easy Operation: Low-friction surfaces on the wedge and a wear-resistant stem nut reduce operating torque, ensuring smooth opening and closing.
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Self-Cleaning Design: The valve features a smooth, full bore without recesses at the bottom, preventing sediment accumulation and damage to the seal.
7. Selection & Application Notes
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Temperature Range: EPDM is suitable for water and mild acids up to 80°C. NBR is better suited for oil applications but has a lower temperature resistance.
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Installation: Suitable for horizontal or vertical installation. Ensure sufficient space above the valve for stem travel and operation.
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Flow Characteristic: Designed for ON/OFF service only. Do not use as a throttling or control valve to avoid damaging the sealing surface.
