Materials of Construction (MOC)
| Component | Material Specification |
|---|---|
| Body & Bonnet | Cast Steel (ASTM A216 Gr. WCB/WCC) |
| Stem / Spindle | SS 410 / SS 304 |
| Seat / Trim | 13% Cr. SS / Stellite 6 Overlay |
Technical Specifications
| Parameter | Specification / Standard |
|---|---|
| Manufacturing / Design Standard | API 600 / BS 1414 / ASME B16.34 |
| Testing Standard | API 598 / EN 12266-1 |
| Pressure Rating | Class 150 / Class 300 / Class 600 |
Features & Benefits
Mechanical Seal Independent of Pressure
Cam-driven disc expansion provides positive seal regardless of line pressure, ensuring tight shutoff even at zero or negative differential.
True Double Block and Bleed
Two independent seating surfaces with body cavity bleed valve provide true DBB isolation for safe online maintenance and valve proving.
Gate Retracts Before Movement
Discs retract from seats before gate translation, eliminating sliding contact and reducing seat wear by 80% compared to sliding gate designs.
Low Seat Wear
Minimal contact movement and Stellite hard facing extend seat life to 10,000+ cycles even in abrasive or coking service.
Position Indicator
Rising stem with clear OPEN/CLOSED marking and optional limit switches for remote position confirmation.