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
Pressure Seal Bonnet
Bonnet seal gasket is compressed by internal line pressure -- the higher the pressure, the tighter the seal. Eliminates leak paths common in bolted bonnet designs at high pressure.
Wedge or Parallel Slide Options
Flexible wedge for general service; parallel slide for thermal cycling and steam service where thermal binding is a concern.
Stellite Seat Overlay
Stellite 6 hard-facing on seat rings resists erosion, galling, and wear at high temperature and high velocity.
Backseat Design
Stem backseat allows packing replacement while the valve is under pressure, improving maintenance safety.
Anti-Blowout Stem
Stem is retained by the pressure seal bonnet geometry and cannot be ejected under pressure.
Live-Loaded Packing
Graphite braided packing with live-loading disc springs maintains seal compression during thermal cycling.