Materials of Construction (MOC)
| Component | Material Specification |
|---|---|
| Body & Bonnet | Cast Steel (ASTM A216 Gr. WCB/WCC) |
| Stem / Spindle | SS 410 / SS 304 |
| Seat / Trim | 13% Cr. SS / Stellite 6 Overlay |
Technical Specifications
| Parameter | Specification / Standard |
|---|---|
| Manufacturing / Design Standard | API 600 / BS 1414 / ASME B16.34 |
| Testing Standard | API 598 / EN 12266-1 |
| Pressure Rating | Class 150 / Class 300 / Class 600 |
Features & Benefits
Guided Piston Stability
Integral guide wings and body guide ribs maintain perfect axial alignment, preventing side loading, vibration, and seat damage.
Spring-Assisted Rapid Closure
Optional Inconel X-750 spring accelerates piston seating on flow reversal, minimising water hammer and backflow in compressor and pump discharge.
Low Cracking Pressure
Precision-lapped piston and seat provide cracking pressure as low as 0.1 bar, reducing pump energy and enabling low-flow start-up.
Horizontal Installation Optimised
Piston weight is supported by guide ribs, preventing sag and ensuring consistent seating in horizontal pipe runs.
Renewable Trim
Replaceable screwed seat ring and piston assembly allow in-line maintenance without removing valve from piping or disturbing welds.