A bonnet is a protective cover component in steam generator pressure relief valves that houses internal mechanisms and provides structural integrity.
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Leakage Class | ANSI/FCI 70-2 Class IV or better | |
| Surface Finish | Ra 3.2 μm or better | |
| Connection Type | Flanged, threaded, or welded | |
| Pressure Rating | ASME Class 150-2500 | |
| Design Standards | ASME B16.34 | |
| Temperature Range | -20°C to 425°C |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is used in the following industrial products
Safety valve assembly for industrial steam generators that prevents overpressure conditions.
This pressure relief valve assembly is a safety component designed for installation on metal tanks, reservoirs, and pressure vessels.
The main structural housing of a control valve that contains and supports the internal flow control components.
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The bonnet serves as a protective housing that contains internal valve components, maintains pressure integrity, and provides structural support while allowing for adjustment of the relief pressure setting.
Generally not recommended due to differences in design, dimensions, and pressure ratings. Bonnets are typically designed as integral components of specific valve models and should only be replaced with OEM-approved parts.
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