Large Bore Resilient Seated Gate Valve
In demanding industrial applications where reliability, durability, and a tight seal are paramount, the Large Bore Resilient Seated Gate Valve stands as an essential component. Engineered for superior performance in water distribution, wastewater treatment, irrigation systems, and general industrial services, this valve type offers exceptional bubble-tight shut-off and minimal maintenance requirements. Its resilient, or elastomeric, seat provides a flexible sealing surface against the gate, ensuring a leak-proof closure even in the presence of minor solids or debris. For applications requiring robust performance in large-diameter pipelines, our Large Size Soft Seat Gate Valve represents a top-tier solution, combining heavy-duty construction with the operational simplicity of a gate valve design. Key advantages include full bore flow for minimal pressure drop, bidirectional sealing capability, and ease of operation, making it a cost-effective and long-lasting choice for critical infrastructure projects.
The design and construction of the Large Bore Resilient Seated Gate Valve prioritize longevity and field reliability. The valve body is typically constructed from high-grade ductile iron, coated internally and externally with advanced epoxy or fusion-bonded epoxy (FBE) for superior corrosion resistance, making it suitable for both buried and above-ground installations. The internal wedge gate, often made from ductile iron with an epoxy coating, features a precision-machined profile that mates perfectly with the resilient seat. This seat is manufactured from premium-grade elastomers like EPDM or NBR, selected for their excellent resistance to water, abrasion, and a wide range of chemicals. The stem is generally made from stainless steel to prevent corrosion and ensure smooth, reliable operation over thousands of cycles. Operation can be via a handwheel, gear operator, or actuation (electric, pneumatic, or hydraulic), providing flexibility for manual or automated control systems. The standard face-to-face dimensions adhere to recognized standards like AWWA C509 or EN 1074-1, ensuring easy integration into existing pipeline networks.
Key Product Parameters
- Size Range: DN300 to DN1200 (12" to 48")
- Pressure Rating: PN10 / PN16 (AWWA C509 Class 150B)
- Body Material: Ductile Iron (GGG-50), Epoxy Coated
- Seat Material: EPDM (Standard), NBR, or other elastomers upon request
- Gate Material: Ductile Iron, Epoxy Coated
- Stem Material: Stainless Steel (AISI 304 or 316)
- End Connection: Flanged (EN 1092-2, ANSI B16.1, AS 4087)
- Operation: Handwheel, Gear Operator, or Actuator
- Standards: AWWA C509, EN 1074-1, ISO 5208 Leakage Rate 'A'
- Temperature Range: -10°C to +70°C (depending on seat material)
| Nominal Diameter (DN) | Face-to-Face Length (mm) AWWA C509 | Approx. Weight (kg) with Handwheel | Max. Working Pressure (bar) |
|---|---|---|---|
| 300 | 660 | 290 | 16 |
| 400 | 787 | 480 | 16 |
| 500 | 914 | 720 | 16 |
| 600 | 991 | 1100 | 16 |
| 800 | 1295 | 2200 | 10 |
| 1000 | 1575 | 3500 | 10 |
Material Specifications & Options
| Component | Standard Material / Coating | Alternative Options |
|---|---|---|
| Body & Bonnet | Ductile Iron, Epoxy Coated | Cast Iron, Full Stainless Steel |
| Resilient Seat | EPDM (for potable water) | NBR, Viton, Hypalon |
| Gate (Disc) | Ductile Iron, Epoxy Coated | Stainless Steel Coated, Bronze |
| Stem | Stainless Steel AISI 304 | Stainless Steel AISI 316, Coated Carbon Steel |
| Bolting & Nuts | Hot-Dip Galvanized Steel | Stainless Steel |
| Internal Coating | Epoxy Powder | FBE, PU, or as per client spec |
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