Performing maintenance
Breather maintenance
The breather is a float-controlled valve whose job it is, once installed, to vent
any air or other gases in continuous operation, which have collected to a
maximum level in liquid-filled containers or pipes or aerate the system when
the fluid level is dropping.
This function is automatic - without any additional electrical / pneumatic
power.
Depending on the level of liquid, a float opens or closes a valve for venting or
de-aerating either directly or with a lever ratio.
The self-actuating function of the pipe fitting requires maintenance for perfect
functioning. Plan and carry out maintenance work at regular intervals.
NOTICE
Faulty breather
The filter area of the filter elements is not being used to its full potential.
►
The breather has functional parts which need to remain in smooth
operation. Make sure that parts touched by the fluid do not become
clogged by deposits or dirt (at the float in particular).
►
Adhere to the maintenance intervals.
The breather is not a shut-off device which guarantees a sealed
end of the valve.
In closed position as per DIN EN 60534-4 and/or ANSI FCI 70-2
it can identify a leakage rate that corresponds to leak classes III
or V:
-
Leakage class III (metallically sealing poppet) = 0.1% K
vs
value
-
Leakage class V (soft-sealing poppet) = 1.8 x 10
-5
x Δp x seat
diameter [l/h]
OLSW
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2017-11-09
Summary of Contents for OLSW
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