Rising Stem Elastic Seated Gate Valve
Rising Stem Elastic Seated Gate Valve: Engineered for Superior Sealing and Flow Control
For applications demanding absolute tightness and reliable operation, the Rising Stem Elastic Seated Gate Valve stands as the definitive solution. This advanced valve design marries the traditional strength of a gate mechanism with a modern, elastomeric seat to deliver exceptional performance in water supply, wastewater treatment, irrigation, and general industrial service. The key to its superior leak-proof performance lies in its resilient, replaceable seat, which forms a perfect seal against the wedge or gate, ensuring zero leakage in both directions. The rising stem design provides a clear visual indication of the valve's open or closed position, enhancing operational safety and control. This makes it an excellent choice over traditional metal-seated valves where sealing issues are common. When considering alternatives for specific pressure ratings or material compatibility, engineers often evaluate a Rising Stem Soft Sealing Gate Valve or a Lift Stem Resilient Seat Gate Valve, which share similar core principles of using an elastic sealing element for enhanced bubble-tight shutoff.
Core Design and Technical Specifications of the Rising Stem Elastic Seated Gate Valve
The operational excellence of the Rising Stem Elastic Seated Gate Valve is rooted in its precise engineering and high-quality material construction. The valve body is typically manufactured from robust ductile iron, often coated with epoxy for superior corrosion resistance, ensuring a long service life even in harsh environments. The heart of the valve is its elastomer-sealed wedge. During the closing operation, the wedge compresses the elastic seat, creating a uniform, pressure-assisted seal that becomes tighter as system pressure increases. This design inherently compensates for minor wear and seat compression set. The stem, which is threaded and rises outside the valve body when opened, is made from stainless steel to prevent corrosion and ensure smooth, low-torque operation through numerous cycles.
Key Product Parameters:
- Type: Non-rising stem / Outside Screw & Yoke (OS&Y) design available.
- Pressure Rating: Standard ratings of PN10/PN16 (Class 150). Higher pressure classes available upon request.
- Temperature Range: Suitable for media temperatures from -10°C to 120°C, depending on seat material.
- End Connections: Flanged ends per EN 1092-2, DIN, ANSI/ASME standards. Grooved or threaded ends are also options.
- Operation: Handwheel for manual operation. Can be fitted with electric, pneumatic, or hydraulic actuators for remote control.
- Seat Material: EPDM (for water), NBR (for oils), or VITON (for high temperatures/chemicals).
- Body Material: Ductile Iron (GGG40/50) with epoxy coating. Cast Iron, Carbon Steel, and Stainless Steel variants.
Detailed Technical Data Table
| Feature | Specification | Standard / Detail |
|---|---|---|
| Design Standard | EN 1171, ISO 5208 | Leakage Rate: Rate A (Bubble-tight) |
| Face-to-Face | EN 558-1 Series 14 | Compatible with most pipeline layouts |
| Flange Standard | EN 1092-2, PN10/16 | Raised face, RF finish |
| Test Standard | Shell Test: EN 12266-1 | Seat Test: 1.1 x PN (Air or Water) |
| Stem Seal | Multiple O-ring arrangement | Material: NBR/EPDM with anti-blowout design |
| Flow Characteristics | Full Bore Design | Minimal pressure drop, no cavitation in open position |
| Applications | Potable Water, Sewage, Industrial Water, Fire Protection Systems, Irrigation, General Service | |
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