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
Automatic Start-Up Air Venting
Bimetallic element is wide open when cold, allowing rapid purging of large air volumes during boiler and steam system start-up.
Calibrated Temperature Closing
Factory-calibrated bimetallic stack closes valve at a precise temperature below steam saturation, minimising steam loss while ensuring complete air removal.
Self-Acting No Power Required
Operates entirely on thermal expansion of the bimetallic element; no electricity, compressed air, or external control required.
Renewable Trim
Replaceable valve plug and seat ring allow restoration of shutoff performance without replacing the complete valve.
High Air Discharge Capacity
Large vent orifice and low cracking pressure provide rapid air discharge to reduce boiler start-up time and steam line warm-up duration.