SPIRAX SARCO
VB21
Vacuum breakers & diffusers
Support condensate-system operation with vacuum-breaking or discharge-diffusion functions. Select the specific device for its intended duty.
Nominal size½ in system / ⅛ in air
Body materialStainless steel
ConnectionScrewed
Confirm availability
Stock, configuration, country of origin and delivery date are confirmed in our quotation.
Technical overview
| Brand | Spirax Sarco |
|---|---|
| Model / series | VB21 |
| Product family | Vacuum breakers & diffusers |
| Nominal size | ½ in system / ⅛ in air |
| Body material | Stainless steel |
| Connection | Screwed |
| Design rating / limits | BSP / NPT |
| Reference | IM-P019-05 |
¹ Availability varies by model, size and regional configuration. ² Larger sizes have separate documentation.
Series overview only. Pressure and temperature limits are interdependent. Match the complete model, connection and trim to the current manufacturer datasheet before ordering.
Technical documents
VB14 AND VB21-IM-P019-05-ENEnglish PDFRead the document revision and configuration notes before selecting.
Manufacturer sourceSelection checklist
VB21 is the stainless-steel version. Use the VB21 section of the English installation document; do not apply VB14 limits.
Provide the full model or a clear nameplate, operating conditions, end connections, quantity and required delivery date.
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