Non-Rising Stem Rubber-Seated Gate Valve
Description
Technical Datasheet
| Parameter | Specification |
|---|---|
| 1. Valve Type | Non-Rising Stem (NRS) Resilient Wedge Gate Valve |
| 2. Design Standard | AWWA C509, ISO 5208, BS EN 1074-1 |
| 3. Size Range | DN50 to DN600 (2″ to 24″) |
| 4. Pressure Rating | PN10/PN16 (150 psi / 230 psi) • Test Pressure: 1.5×PN (Shell), 1.1×PN (Seat) |
| 5. Temperature Range | -10°C to +80°C (Standard EPDM) -30°C to +130°C (Optional FKM) |
| 6. Flow Design | Full Port (100% Bore) ∙ Low Turbulence ∙ Cv: DN150 ≈ 2000 |
| 7. Body Material | Ductile Iron (EN-GJS-500-7/GGG50) ∙ Epoxy Coated (RAL 5017) |
| 8. Wedge/Gate | Ductile Iron + Full EPDM Encapsulation (3mm min. thickness) |
| 9. Stem | AISI 316 Stainless Steel ∙ Threaded ∙ Non-Rising Design |
| 10. Seat Seal | EPDM Rubber ∙ Bubble-Tight Shutoff (ISO 5208 Rate A) |
| 11. Stem Seal | EPDM O-Rings + Gland Packing (Adjustable) |
| 12. Bonnet | Bolted Ductile Iron ∙ EPDM Gasket |
| 13. Operation | • Handwheel (Fixed/Tamper-Proof) • Gear Operator (DN≥300) • Actuator Mounting Pad (ISO 5211) |
| 14. End Connections | • Flanged (EN 1092-1, AWWA C207) • Mechanical Joint (AWWA C111) • Grooved (AWWA C606) |
🔧 Key Features
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Space-Saving Design: Stem does not rise – suitable for confined spaces.
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Corrosion Resistance: Full rubber encapsulation isolates metal from fluid.
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Zero Leakage: Double-sealed stem (O-ring + packing) and resilient seat.
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Low Torque Operation: EPDM wedge reduces friction vs. metal seats.
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Bidirectional Sealing: Equal performance in both flow directions.
