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
External Pilot Control
Independent pilot valve provides precise pressure sensing and faster response than conventional direct-spring designs.
Soft-Seat Bubble-Tight Shutoff
PTFE/SS316 soft seat achieves Class VI zero-leakage sealing under normal operating conditions, minimising gas loss.
Top-Entry Bonnet Design
In-line maintenance capability -- seat, trim, and pilot can be serviced without removing the valve from the pipeline.
Factory-Set & Sealed
Each valve is individually tested, set, and mechanically sealed at the factory to the purchaser's exact set pressure and blowdown requirements.
Full API 526/527 Compliance
Designed, manufactured, and tested in accordance with API 526 flanged steel pressure relief valves and API 527 seat tightness standards.