Pipeline ancillaries Vacuum breakers
10
Capacity D p required to open vacuum breaker 4.6 mm Hg (0.2 in Hg)
∆p (in Hg)
1 1.2 1.6 2
4
8
12 16 20
6.4
4.2
2.1 1.9 1.7 1.5 1.3 1.1
D p (mm Hg)
Dimensions/weights (approximate) in mm (inches) and kg (lbs)
B
Size
A
B (A/F) 30 (1.18)
C
Kv Weight
A
52 (2)
34 (1.34)
0.33 (0.73)
½"
0.52
C
10.12 75
Safety information, installation and maintenance For full details see the Installation and Maintenance Instructions (IM-P095-02) supplied with the product. Installation note The VBS21 vacuum breaker must be installed in a vertical position with the system connection at the bottom. On steam systems, the vacuum breaker should be installed at the highest point in the system where it will not be flooded with condensate.
How to order Example: 1 off Spirax Sarco VBS21 vacuum breaker having ½ " screwed BSP connections.
TI-P095-01 CMGT Issue 1
Page 3 of 3
VBS21 and VBS21 Food+ Vacuum Breaker
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