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
Surge Anticipation Before Wave Arrives
High-sensitivity pilot detects the initial pressure drop at pump stop and opens valve before the returning surge wave reaches the valve.
Self-Acting No External Power
Operates entirely on pipeline pressure dynamics; no electricity, compressed air, or control panels required.
Slow Closing Prevents Secondary Surge
Adjustable needle valve on pilot exhaust provides slow, controlled closing to prevent secondary water hammer.
High Flow Capacity
Full-port plug and streamlined body provide high discharge capacity to rapidly absorb surge energy and prevent pressure spike.
Field-Adjustable Setpoint
Pilot spring is easily adjustable in field to match actual pipeline operating pressure and surge characteristics.