HYDRAU-FLO
®
Description
Document Number:
Revision: 0
CONTROLLED DOCUMENT
Copyright © 2015, Weir Minerals Australia Ltd. All rights reserved.
Page 3-14
Issue Date: 23 February 2015
3.3.3 Hydrau-Flo
®
Anti-Surge Breathers
NOTICE
The Hydrau-Flo
®
anti-surge breather with filter option is used in the same applications as the
original anti-surge breather but provides the benefits of filtered air to prevent fuel contamination.
Table 3-3: Anti-Surge Breathers
Anti-Surge
Breathers (ASB)
Description:
Reference Image:
Standard ASB
HF1008Z0002
1000 Lpm
264 USgpm
(2” NPT Male
Valve Mounting)
The standard anti-surge breather has the
same functions as float control valves
including rollover protection and fuel anti-
surge.
ASB with Filter
Option
HF1008Z0010
1000 Lpm
264 USgpm
(2” NPT Male
Valve Mounting)
The anti-surge breather with filter option has
the same functions as the float control valves
including the rollover protection. It also
provides
filtered
air
to
precent
fuel
contamination. This unit is capable of
environmental filtering up to 3 microns.
In the normal vertical position, the weight of the vent float compresses the spring and the porting to the atmosphere is
un-obstructed. As the assembly starts to tilt, the effective weight of the vent float against the spring decreases and the
spring starts to raise the float and closes off the vent porting well before the diesel fuel reaches the open vent porting.
As the assembly continues to tilt, the weight of the diesel fuel too holds the float to be closed against the vent port. The
positive sealing provided with an O-ring ensures no leakage whatsoever.
Figure 3-3: Roll Over Protection
