Double-Disc Gate Valve Assembly
Product Overview
FAC Regular Double-Disc Gate Valves are designed in accordance with API 6D standards. They are characterized by two spring-loaded discs that automatically adapt to body seat alignment, ensuring a tight shut-off under pressure. This design makes them ideal for services where tightness and reliability are critical.
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Technical Specifications
| General Construction | API 6D |
| Face to Face Dimensions | API 6D |
| Inspection & Testing | API 6D |
| Material Construction | As per ASTM A |
| Carbon Steel | WCB |
| Stainless Steel | CF 8M / CF 8 |
| Class | 150 to 1500 |
| Size | 2” to 24” |
| Flanged Ends | ANSI B 16.5 |
| Butt Weld End | ANSI B 16.25 |
Application & Function
Gate valves are primarily used for stop valves fully opened or fully closed. They are not normally considered for throttling purposes, but more for slurries, viscous fluids, etc.
Gate valves are characterized by a traveling wedge, which is moved with the operation of the stem nut. The wedge travels perpendicular to the direction of the flow. They usually have a minimum pressure drop when fully open, provide tight shut-off when fully closed, and remain relatively free of contamination buildup.
Design Features
This valve utilizes a double-disc wedge design where two spring-loaded discs automatically adapt to body seat alignment, ensuring a tight shut-off. This design is particularly suited for applications where body distortion due to line loads or thermal expansion might otherwise cause leakage in single-wedge designs.
- API 6D Compliance
- Tight Shut-off
- Automatic Seat Alignment
- Low Pressure Drop
Construction & Materials
Constructed from high-quality carbon steel (WCB) or stainless steel (CF 8/CF 8M), these valves are designed to withstand demanding service conditions. The simplified design offers ease of maintenance and long service life.
Standard Configuration
End Connections & Accessories
Standard production covers valves with:
- Flange ends with Raised Face (RF), Flat Face (FF) or Ring Type Joint (RTJ) that conform to ANSI B16.5.
- Butt-welding ends (BW) that conform to ANSI B16.25.
- Other special end connections are supplied according to customer’s requirements.
Accessories Include: Gear operators, actuators, bypasses, locking devices, chainwheels, extended stems and bonnets for cryogenic service and many others are available to meet the customers requirements.
For 1,500 # and 2,500 # and special material details will be provided on request.