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
Self-Acting No External Power
Direct-acting diaphragm senses downstream pressure and modulates valve without electricity, compressed air, or control panels.
Constant Downstream Pressure
Maintains set downstream pressure within ± 0.2 bar regardless of upstream pressure swings or changing flow demand.
Wide Flow Turndown
Stable control from 10% to 100% of rated flow without hunting or pressure oscillation in building and distribution systems.
Slow Opening Anti-Surge
Streamlined plug and guide bearings provide gradual opening to prevent pressure surge and water hammer during sudden demand changes.
EPDM Resilient Seat
SS316 plug with EPDM insert provides bubble-tight shutoff at zero flow for isolation during downstream maintenance.