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© 05.2022
Straight screw
fitting
Inch, AF 19
12.1 BV breather valve
12.1.2 Application / Function
The breather valve is used as replacement for the costly and time-consuming laying of breather lines
and for securing the installation room against inadmissible escape of gas from diaphragm comparator compartments
of gas pressure regulators and safety shut-off valves.
In compliance with EN 12186:2014, the use of the BV guarantees that in case of a defect of the working diaphragm,
escape of gas from the breather connection of the gas pressure regulator or of the safety shut-off valve of more than 30
l/h is prevented.
12.1.1 Use
•
On SAV control devices
•
On regulators (pilots)
•
With low-dynamic regulation sections (one full stroke)
•
On the SRV (SL10)
Connection example R51
BV breather valve
Gas pressure regulator R51
12.1.3 Technical Data
• Type
BV
• Max. allowable pressure PS
25 bar
• Max. operating pressure p
max
25 bar
• Max. allowable flow rate
30 l/h
• Connection type
Male thread G
3/8“ or G 1/4“
• Temperature range class 2
-20 °C to +60 °C
(operating/ambient temperature)
12
appr
ox. 92.5
approx. 109
Ø 45
BV
AF 32
Straight screw fitting
G 1/4“, AF 19
Union nuts
AF19
G1/4“
or
G3/8“
Angled pipe
12 Accessories / Options