Materials of Construction (MOC)
| Component | Material Specification |
|---|---|
| Body & Bonnet | Stainless Steel (ASTM A351 Gr. CF8/CF8M) |
| Stem / Spindle | SS 304 / SS 316 |
| Seat / Trim | PTFE / RPTFE / Integral |
Technical Specifications
| Parameter | Specification / Standard |
|---|---|
| Manufacturing / Design Standard | ASME B16.34 / API 603 / API 6D |
| Testing Standard | API 598 / EN 12266-1 |
| Pressure Rating | Class 150 to Class 600 / PN16 / PN40 |
Technical Specifications
| Parameter | Specification / Standard |
|---|---|
| Manufacturing / Design Standard | ASME B16.34 / API 603 / API 6D |
| Testing Standard | API 598 / EN 12266-1 |
| Pressure Rating | Class 150 to Class 600 / PN16 / PN40 |
Features & Benefits
Zero Fugitive Emissions
Metallic bellows provides absolute stem seal, eliminating packing leakage to atmosphere.
Extended Bonnet
Positions bellows and handwheel in ambient zone, preventing frost damage and operator injury.
Steam Jacket Option
Half-pipe jacket welded around body maintains fluid temperature, preventing crystallisation or polymerisation in standby.
Secondary Gland Packing
Graphite packing below bellows acts as emergency backup in the unlikely event of bellows rupture.
Long Cycle Life
Multi-ply hydroformed bellows tested to 50,000 full-stroke cycles without fatigue failure.