valco fittings
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Filters
tech tip
Should you use a
filter with a frit or
one with a screen?
Screens have much
higher flow capacity
(Cv), but frits are the best
choice for maximum
filtration or if your
application requires
Hastelloy C or titanium.
However, since they are
thicker than screens,
frits allow more mixing,
and the downside of
their superior filtration
is that they clog more
often than screens.
Note! The difference
in thickness also
means that frits and
screens cannot be used
interchangeably in
the same fitting body:
A frit must always be
replaced with a frit.
A screen must
always be replaced
with a screen.
Replacement
screens . . . . page 53
Reducing filter with a removable screen
1/8" to 1/16"
(ZRUFR21)
1/8" to 1/16"
internal reducer
to hold screen in position
1/8" fitting
removable screen
cone
in liner
liner
cone in
filter body
F
ilters with a removable screen
T
hese filters come with a removable 2µ screen. The standard screen can be
replaced with any screen of the proper diameter,
but not by a frit
. These filters are
suitable for streams with frequent contamination, since the filtering element is
easily changed. Standard material is Type 316 series stainless.
P
atent Numbers 4,281,679 and 4,173,363
Standard
Bulkhead
Description
Bore Prod No
Price Prod No
Price
1/32" to 1/32"
0.25 mm ZUFR.5
ZBUFR.5
1/16" to 1/32"
0.25 mm ZRUFR1.5
ZBRUFR1.5
1/16" to 1/16"
0.25 mm ZUFR1C
ZBUFR1C
0.50 mm ZUFR1
ZBUFR1
1/8" to 1/16"
0.75 mm ZRUFR21
ZBRUFR21
1/8" to 1/8"
2.00 mm ZUFR2
ZBUFR2
1/4" to 1/16"
1.00 mm ZRUFR41
ZBRUFR41
1/4" to 1/8"
2.00 mm ZRUFR42
ZBRUFR42
0.25 mm = .010"
0.50 mm = .020"
0.75 mm = .030"
1.0 mm = .040"
1.5 mm = .060"
2.0 mm = .080"
4.6 mm = .180"
6.0 mm = .236"
6.4 mm = .253"
7.0 mm = .275"
10.0 mm = .400"
27.0 mm = 1.08"
1/32" = 0.8 mm
1/16" = 1.6 mm
1/8" = 3.2 mm
1/4" = 6.4 mm
3/8" = 9.5 mm
1/2" = 12.7 mm
5/16" = .312" = 7.9 mm
3/8" = .375" = 9.5 mm
7/16" = .437" = 11.1 mm
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