2024年3月16日发(作者：琴依波)
Filter
Clogging Indicators
1.1 gENErAL
HYDAC clogging indicators are
designed to show visually and/or
electrically when a filter element must
be changed or cleaned. Operational
safety of a system and efficient
utilisation of a filter element can only
be guaranteed if clogging indicators
are used.
Depending on the type of filter,
vacuum, return line or differential
pressure clogging indicators are used.
1.2 SEALS
NBR (= Perbunan) or V (= Viton)
1.3 INSTALLATION
Some users install filters without
clogging indicators and prefer instead
to replace or clean the elements
according to a specified time schedule
or according to a set number of
operating hours. However this involves
some risk.
Fitting a clogging indicator has two
main advantages:
z The operator no longer has to estimate
when the element is clogged
z The unnecessary costs of changing
the element too early are avoided
All standard filters can be fitted with
a clogging indicator at any time, by
simply screwing it in.
1. TECHNICAL
SPECIFICATIONS
1.4 CONSTruCTION
return line indicators
These are used for return line and
suction filters.
In return line filters they react to the
increasing static pressure before the
filter element, caused by increasing
contamination; in suction filters to the
decreasing pressure after the filter
element.
1.5 SPECIAL INDICATOrS
Mobile indicators
These indicators have been developed
for special applications and are fitted
with AMP, Deutsch and Junior Power
Timer plugs.
ATEX indicators
These indicators are used in
potentially explosive locations and
are subject to the ATEX Equipment
Directive 94/9/EC and the ATEX
Operator Directive 1999/92/EC.
uL indicators
Indicators which are exported to
the USA often require classification
according to the UL standards in force.
The UL symbol is found on many
products, particularly in the field of
electrotechnology.
82
84
86
88
E
7
.
0
5
0
.
1
2
/
0
2
.
0
8
Differential pressure indicators
These are used for all inline filters
and react to the increasing pressure
differential caused by increasing
contamination of the filter element.
1.6 TAbLE OF CONTENTS
Simple mounting of the differential
Contents
clogging indicator: G ½" cavity
(according to HYDAC works standard
Quick selection table
HN 28-22)
by indicator type
Quick selection table
The differential pressure indicator, type
by filter type
V02, must be fitted separately inline.
Standard indicators
Vacuum
Return line
Differential pressure
Indicator for
Condition Monitoring
Mobile indicators
Return line
Differential pressure
ATEX indicators
Return line
Differential pressure
uL indicators
Differential pressure
contaminated
Model code standard
side
Adaptors
DESINA specification
clean side
Page
50
51
52
55
69
72
77
77
79
80
49
2. QuICk SELECTION TAbLES FOr CLOggINg INDICATOrS
2.1 by INDICATOr TyPE
Please select the type of indicator you require from the table.
Type
VisualB
BM
E
ES
K
R
UBM
UE
V
C
D
F
LE
LZ
UF
VE
VZ
GC
GW
CD
CJ
FD
B
C
C
D
Vacuum
indicator
Return line
indicator
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
Differential pressure
indicator
z
z
Electrical
Electronic
Mobile
z
z
z
z
z
z
ATEX
UL approval
(=CRUUS)
50
E
7
.
0
5
0
.
1
2
/
0
2
.
0
8
2024年3月16日发(作者：琴依波)
Filter
Clogging Indicators
1.1 gENErAL
HYDAC clogging indicators are
designed to show visually and/or
electrically when a filter element must
be changed or cleaned. Operational
safety of a system and efficient
utilisation of a filter element can only
be guaranteed if clogging indicators
are used.
Depending on the type of filter,
vacuum, return line or differential
pressure clogging indicators are used.
1.2 SEALS
NBR (= Perbunan) or V (= Viton)
1.3 INSTALLATION
Some users install filters without
clogging indicators and prefer instead
to replace or clean the elements
according to a specified time schedule
or according to a set number of
operating hours. However this involves
some risk.
Fitting a clogging indicator has two
main advantages:
z The operator no longer has to estimate
when the element is clogged
z The unnecessary costs of changing
the element too early are avoided
All standard filters can be fitted with
a clogging indicator at any time, by
simply screwing it in.
1. TECHNICAL
SPECIFICATIONS
1.4 CONSTruCTION
return line indicators
These are used for return line and
suction filters.
In return line filters they react to the
increasing static pressure before the
filter element, caused by increasing
contamination; in suction filters to the
decreasing pressure after the filter
element.
1.5 SPECIAL INDICATOrS
Mobile indicators
These indicators have been developed
for special applications and are fitted
with AMP, Deutsch and Junior Power
Timer plugs.
ATEX indicators
These indicators are used in
potentially explosive locations and
are subject to the ATEX Equipment
Directive 94/9/EC and the ATEX
Operator Directive 1999/92/EC.
uL indicators
Indicators which are exported to
the USA often require classification
according to the UL standards in force.
The UL symbol is found on many
products, particularly in the field of
electrotechnology.
82
84
86
88
E
7
.
0
5
0
.
1
2
/
0
2
.
0
8
Differential pressure indicators
These are used for all inline filters
and react to the increasing pressure
differential caused by increasing
contamination of the filter element.
1.6 TAbLE OF CONTENTS
Simple mounting of the differential
Contents
clogging indicator: G ½" cavity
(according to HYDAC works standard
Quick selection table
HN 28-22)
by indicator type
Quick selection table
The differential pressure indicator, type
by filter type
V02, must be fitted separately inline.
Standard indicators
Vacuum
Return line
Differential pressure
Indicator for
Condition Monitoring
Mobile indicators
Return line
Differential pressure
ATEX indicators
Return line
Differential pressure
uL indicators
Differential pressure
contaminated
Model code standard
side
Adaptors
DESINA specification
clean side
Page
50
51
52
55
69
72
77
77
79
80
49
2. QuICk SELECTION TAbLES FOr CLOggINg INDICATOrS
2.1 by INDICATOr TyPE
Please select the type of indicator you require from the table.
Type
VisualB
BM
E
ES
K
R
UBM
UE
V
C
D
F
LE
LZ
UF
VE
VZ
GC
GW
CD
CJ
FD
B
C
C
D
Vacuum
indicator
Return line
indicator
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
Differential pressure
indicator
z
z
Electrical
Electronic
Mobile
z
z
z
z
z
z
ATEX
UL approval
(=CRUUS)
50
E
7
.
0
5
0
.
1
2
/
0
2
.
0
8