Double Expanding Gate Valves
Precision-Engineered Valves for Zero Leakage
Through Conduit Double Expanding Gate Valves feature a two-piece gate that expands outward during operation, creating a double barrier on both upstream and downstream seats. The friction-free design minimizes seat and gate wear, ensuring bi-directional tight shutoff and zero leakage. These valves are widely used in Oil & Gas pipeline systems and comply fully with API 6D standards. Double block and bleed functionality is included as standard, making them suitable for critical service applications.
| Category | Specifications |
|---|---|
| Body Material | LTCS / CS (CRA weld overlay option), Stainless Steel, Duplex, Super Duplex, MONEL, Nickel Alloys |
| Seals | Metal seated with hard-facing on gate and seats |
| Design Standards | API 6D, ASME B16.34, ISO 14313, API 6FA, NACE MR0175 |
| Size Range | DN50 (2”) – DN1400 (56”) |
| Connection Type | Flanged RF/RTJ, Clamped Hubs, Butt Weld End |
| Pressure Class | ANSI 150# – 2500# |
| Operation / Actuation | Gear and handwheel, Electric Multi-Turn, Linear Pneumatic actuator |
| Temperature Range | -46°C to 121°C |
Bi-directional tight shutoff
Piggable-compliant design
Zero-leakage performance
Corrosion-resistant construction
Extended seat and gate service life
Suitable for both low and high pressure systems
Reduced downtime due to high reliability
Low operating torque
Pipeline Transmission
Oil & Gas Offshore Platforms
Separation Stations
Refineries
Natural Gas Systems
High-Temperature Service
Pig Traps & Dirty Service
Corrosive Media Handling
Gas Compression Systems