DL..A, DL..K · Edition 02.22
EN-3
3.1 Installation position
➔
Installation in the vertical or horizontal position, or
sometimes upside down, preferably with vertical
diaphragm. If installed in a vertical position, the
switching point p
S
will correspond to the scale
value SK set on the hand wheel. If installed in an-
other position, the switching point p
S
will change
and no longer correspond to the set scale value SK.
Switching point p
S
must be checked.
p
s
= SK
SK + 0,18 mbar
[+ 0,071 "WC]
SK - 0,18 mbar
[- 0,071 "WC]
DL 3K, DL 3A
DL 1,5A
DL 5 – 150A, DL 5 – 150K
z. B. SK = -0,5:
p
s
= -0,5 + 0,18
p
s
= -0,32 mbar
3.2 Installing the DL
The following screw specifications apply when using
a (1 mm thick) mounting plate and self-tapping
screws for plastic:
Hole dia./depth
screw dia./
length
DL..A..
Ø 2.7 x 8 mm
Ø 3.5 x 8 mm
DL..A..
Ø 3.5 x 8 mm
Ø 4 x 8 mm
DL 3K
Ø 2.7 x 8 mm
Ø 3 x 8 mm
DL 3K
Ø 3.5 x 8 mm
Ø 4 x 8 mm
DL 5–150K
Ø 3 x 16 mm
Ø 3.5 x 16 mm
49,5 (1.9")
44,5 (1.7")
ø 2,7 x 8
(0.11" x 0.3")
ø 3,5 x 8
(0.14" x 0.3")
ø 6,1 (ø 0.24")
DL..A: Rp ¼
(DL..AT: ¼" NPT)
DL 1,5A, DL 3A, DL 3K
49,5 (1.9")
44,5 (1.7
")
ø 2,7 x 8
(ø 0.11" x 0.3")
ø 3,5 x 8
(ø 0.14" x 0.3")
DL..A: Rp ¼
(DL..AT: ¼" NPT)
DL 5–150A
9,5 (0.4
")
9,5 (0.4
")
15,5 (0.6
")
45 (1.8
")
54,5 (2.1")
6 (0.2")
ø 3 x 16
(ø 0.11" x 0.6)
64 (2.5")
DL 5–150K
3.3 Connecting the pressure line
➔
DL..A: upon delivery, port 2 is closed off by a rub-
ber cap.
DL 1,5A, DL 3A
1 = Rp
1
/
4
(+), (
1
/
4
" NPT (+))
2 = ø 4,75 x 1 mm (+)
3 = ø 4,75 x 1 mm (-)
(4 = Rp
1
/
8
(-),
1
/
8
" NPT (-))
1
(4)
2 3
➔
Positive pressure: port 1 or 2
➔
Negative pressure: port 3
➔
Special version DL 3A–3Z: port 4
DL 5–150A
1 = Rp
1
/
4
(+), (
1
/
4
" NPT (+))
2 = ø 4,75 x 1 mm (+)
3 = ø 4,75 x 1 mm (-)
(4 = Rp
1
/
8
(-),
1
/
8
" NPT (-))
1
Test
2
3(4)
➔
Positive pressure: port 1 or 2
➔
Negative pressure: port 3; after unscrewing port 3,
also port 4
DL 3K
2 = ø 4,75 x 1 mm (+)
3 = ø 4,75 x 1 mm (-)
2 3
➔
Positive pressure: port 2
➔
Negative pressure: port 3
