Spirax Sarco VB14 and VB21 Vacuum Breakers

Spirax Sarco Spirax Sarco VB14 and VB21 are both small general purpose vacuum breaking valves for use primarily in condensate vapor (steam) and liquid systems. Both are available with EN 10204 2.2 certificates for body and bonnet. The sizes and piping connections are ½" BSP or NPT for system connections and 1/8" BSP or NPT for inlet connections and must be mounted in the vertical position with the system connections at the bottom. For safety information, installation and maintenance details, refer to the Installation and Maintenance Guide (IM-P019-05) supplied with the product.

Spirax Sarco Spirax Sarco VB14 Vacuum Breaker

Scope of work

• Valve body design conditions: PN16
• Maximum permissible PMA pressure: 16 bar g @180°C
• Maximum permissible TMA temperature: 260°C@7 barg
• Minimum permissible temperature: -196°C
• PMO maximum saturated steam pressure: 14 bar g
• TMO maximum operating temperature: 260°C@7 barg
• Minimum operating temperature: 0°C
• Note: For lower operating temperatures, please consult Spirax Sarco.
• Maximum design cold hydraulic test pressure: 24 bar g

Weight (approximate)

• Caliber ½": 0.35 kg

material (that sth is made of)

engine displacement (volume of air fuel mixture drawn in during one cycle)

The Δp required to open the breaking vacuum valve is 4.6 mmHg.

Ordering Instructions

1-Spirax Sarco ½" VB14 Breaking Vacuum Valve, BSP threaded connection.

Spirax Sarco Spirax Sarco VB21 Vacuum Breaker

Scope of work

• Valve body design conditions: PN25
• Maximum permissible PMA pressure: 25 bar g 120°C
• Maximum permissible TMA temperature: 400°C@ 13 bar g
• Minimum permissible temperature: -48°C
• PMO maximum saturated steam pressure: 21 bar g
• Maximum TMO operating temperature: 400°C@ 13 bar g
• Minimum operating temperature: 0°C
• Note: For lower operating temperatures, please consult Spirax Sarco.
• Maximum design cold hydraulic test pressure: 38 bar g

Weight (approximate)

• Caliber ½": 0.33 kg

material (that sth is made of)

engine displacement (volume of air fuel mixture drawn in during one cycle)

The Δp required to open the breaking vacuum valve is 4.6 mmHg.

Ordering Instructions

Example: 1 - Spirax Sarco ½" VB21 broken vacuum valve, BSP threaded connection.