Expanding Gate Valves | Mechanical Seal API 6D Gate Valves | FOURVED

The expanding gate valve design represents advanced engineering for reliable pipeline isolation. Unlike conventional gate valves that rely on line pressure for sealing, the expanding gate valve features a two-piece assembly (gate and segment) that mechanically expands against the seats when in closed position.

This mechanical expansion provides positive sealing in both high-pressure and vacuum conditions, making these valves particularly suitable for applications where reliable low-pressure sealing is critical. The expanding action also helps clear debris from the seat area during operation.

The through conduit design provides full-bore flow passage for pigging operations with minimal pressure drop. Floating seats offer bidirectional sealing capability, while the protected seat design extends service life in abrasive services.

Applications:

• Pipeline block valves

• Low-pressure sealing applications

• Vacuum service

• Storage tank isolation

• Pump suction/discharge

• Pipeline scraper bypass

• Critical isolation points

Key Features:

• Mechanical expansion sealing

• Independent of line pressure

• Seals in high and low pressure

• API 6D compliant

• Full bore piggable design

• Bidirectional capability

• Debris-clearing action

Enhanced Specifications: