Materials of Construction (MOC)
| Component | Material Specification |
|---|---|
| Body & Bonnet | Ductile Iron (ASTM A536 / EN-GJS-400-15) |
| Stem / Spindle | SS 410 / SS 420 |
| Seat / Trim | EPDM / NBR / Bronze |
Technical Specifications
| Parameter | Specification / Standard |
|---|---|
| Manufacturing / Design Standard | EN 1171 / AWWA C509 / BS 5163 |
| Testing Standard | API 598 / EN 12266-1 |
| Pressure Rating | PN16 / PN25 |
Features & Benefits
Pressure Seal Bonnet
Graphite pressure seal ring tightens under line pressure, eliminating large bolting and reducing bonnet leakage risk at high temperature and pressure.
Flexible Wedge Auto-Aligns
Single-piece flexible wedge with centre slot auto-aligns to both seats under differential pressure for reliable shutoff even with seat irregularities.
Stellite Hard Facing
Wedge and seat overlay with Stellite 6 cobalt alloy resists steam cutting, erosion, and galling for extended service life.
Full Port Design
Body bore matches pipe inside diameter, allowing pipeline pigging and inspection tools to pass without obstruction.
IBR Certified
Design and material certified to Indian Boiler Regulations for installation in boilers and steam lines under IBR jurisdiction.