All-Stainless Steel Material
Product Overview
The Spirax Sarco VB14 Vacuum Breaker is a compact general-purpose valve primarily used in condensing steam and liquid systems for vacuum breaking operations, ensuring stable system performance. The product features a compact structural design and reliable performance, suitable for vacuum breaking requirements across various industrial applications.
Quality Certification
Body and bonnet can be supplied with EN10204 2.2 certificates, ensuring product quality meets relevant standards.
Technical Specifications
Design Parameters
| Design Parameter | Value |
|---|---|
| Body Design Rating | PN16 |
| Maximum Allowable Pressure (PMA) | 16 bar g @ 180°C |
| Maximum Allowable Temperature (TMA) | 260°C @ 7 bar g |
| Minimum Allowable Temperature | -196°C |
| Maximum Saturated Steam Pressure (PMO) | 14 bar g |
| Maximum Operating Temperature (TMO) | 260°C @ 7 bar g |
| Minimum Operating Temperature | 0°C |
| Cold Hydraulic Test Pressure | 24 bar g |
| Opening Differential Pressure (Δp) | 4.6 mmHg |
Low Temperature Applications
For applications below -196°C, please contact Spirax Sarco for technical support.
Connection Parameters
| Connection Point | Size | Connection Type |
|---|---|---|
| System Connection | ½" | BSP or NPT threaded |
| Air Inlet Connection | 1/8" | BSP or NPT threaded |
Pressure/Temperature Limits
Dimensions and Weight
| Size | Dimension A (mm) | Dimension B (A/F, mm) | Dimension C (mm) | Kv Value | Weight (kg) |
|---|---|---|---|---|---|
| ½" | 55 | 34 | 34 | 0.52 | 0.35 |
Capacities
Materials of Construction
| No. | Component | Material | Specification |
|---|---|---|---|
| 1 | Cap | Brass | CU ZN 39 PB2 |
| 2 | Disc | Stainless Steel | Z 100 CD 17 |
| 3 | Seat | Stainless Steel | Z15 CN 16 02 |
| 4 | Body | Brass | CU ZN 39 PB2 |
| 5 | Gasket | Stainless Steel | AISI 304 |
Installation Instructions
Installation Requirements
- The VB14 vacuum breaker must be installed in a vertical position with the system connection at the bottom.
- When used in steam systems, the vent valve must be installed at the highest point of the system to prevent the valve from being submerged in condensate.
For detailed installation procedures, please refer to the Installation and Maintenance Instructions (IM-P019-05) supplied with the product.
Ordering Information
Spirax Sarco ½" VB14 Vacuum Breaker with BSP threaded connection (other connection types available on request).
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