IBExU: pending drc4612a0600h_08 - 2/3
2.3
D
IMENSIONS
D
C
–
4
–
1/2
"
BSP
FLUSH MEMBRANE
D
E
–
4
–
1”
BSP
FLUSH MEMBRANE
DH
–
4
–
DJ
–
4
–
WITH COOLING ELEMENT
D
V
–
4
–
V
ARIVENT
DN40/50
T
RANSMITTER WITH
PLK-501-2
~33
Ø34,5
Ø26,5
33
SW 27
~6
0
15
18
1/2" BSP
SW 44
22
19
1" BS P
Ø50
~6
0
~33
33
Ø34 ,5
Ø26 ,5
Ø26,5
~3
2
4848
33
33
Ø34,5
Ø26,5
17
Ø64
Ø71
Ø84
~33
33
50
D
D
–
4
–
3/4" BSP
FLUSH MEMBRANE
D
F
–
4
–
1 1/2" BSP
FLUSH MEMBRANE
3. INSTALLATION
Due to its small size and weight NIPRESS D-400 can be directly installed on
tanks, pipes, machines, etc. without mounting device.
To provide chance for replacement of the instrument during operation the use
of closing armature is recommended. A simple ball valve will be suitable for
lower pressures and for higher pressures (above 6 bar) a three-way blow-off
needle-valve can be suggested.
For measuring hydrostatic pressure for level the unit should be thread in a
stub at the tank wall possibly near to the bottom.
Using longer impulse tube its proper sloping for the necessary deaerating and
emptying has to be ensured.
Measuring low pressures in systems with substantial height difference
between the transmitter and place of measurement the hydrostatic pressure
of the medium in the impulse pipe should be taken into consideration. In the
case of outside installation, the unit is supposed to be protected against rain
or splash water.
3.1 INSTALLATION REGULATION
Depending on the medium measured, the medium may cause hazard to the
installer, therefore you should be wearing suitable protective clothing, gloves,
and goggles.
For mounting and dismantling SW27 or SW44 open-end wrench should be
used. Take care for the vulnerable flush face diaphragm.
The cylindrical housing of the transmitter should not be gripped
and tightened with pipe wrench!
The plug-in electric connector can be unplugged after releasing and removing
its fastening screw. The connection insert can be pushed out by a screw
driver from the direction of the screw.
Pushing electric cable through the cable gland it can be connected to the
relevant points of the connector. Make sure that the cable gland and sealing
plate of the connector will be tight.
For the sake of noise suppression, the transmitter should be grounded. If the
grounding of the appliance with the pressure transmitter is appropriate no
further action will be needed. If not, the grounding should be performed.
Installation steps:
The specified tightening torques must not be exceeded!
Tightening torques
:
1/4” BSP: max. 5 Nm; 1/2” BSP max. 10 Nm; 3/4” BSP: max. 15 Nm; 1” BSP:
max. 20 Nm; 1 1/2" BSP: max. 25 Nm.
Mounting steps for connections according to DIN 3852:
Do not use any additional sealing material such as teflon tape! Check the o-
ring is undamaged, it has a flawless and clean surface and seated in the
designated groove. Screw the device into the corresponding thread by hand,
and tighten the parts with a suitable torque wrench.
Mounting steps for dairy pipe connections (DIN11851):
Check the o-ring is undamaged, it has a flawless and clean surface and
seated in the designated groove.
Centre the dairy pipe connection in the counterpart. Screw the cup nut onto
the mounting part, then tighten it using a suitable wrench.
Mounting steps for Clamp and Varivent
£
connections:
Choose a suitable seal for the measured medium and pressure. Place the
seal onto the corresponding mounting part. Centre the clamp connection or
Varivent
£
connection above the counterpart with seal, then fasten the device
with a suitable fastening element (e. g. half-ring or retractable ring clamp)
according to the supplier’s instructions.
3.2 CONDITIONS OF SAFE OPERATION
Before device turn on, make sure the installation is complete, and there are
no visible defects. The device may only be used within the limitations
specified in the technical specifications.
The device connector must be installed in such a way that the IP20 level of
protection is always remain.
Ex ia certified transmitters can only be operated in qualified, certified and
approved galvanically isolated intrinsically safe Ex ia circuits complying with
the technical data and the device’s explosion protection marking.
The metal housing of the device must be connected to the EP network.
D
AIRY PIPE
DIN
11851
T
RI
-C
LAMP
10
ØA
ØB
51
33
33
Ø34
Ø26,5
5
ØA
ØB
50
33
33
Ø34
Ø26,5
T
YPE
D
O–
4
–
D
P–
4
–
D
R–
4
–
D
T–
4
–
D
L–
4
–
D
M–
4
–
D
N–
4
–
D
IMENSIONS
DN 25
DN 40
DN 50
3/4"
1"
1 1/2"
2"
A
[mm]
23 32 45 14 23 32 45
B
[mm]
44 56 68.5 25 50.5 50.5 64
P
N
[bar]
0.25
40
0.25
40
0.25
25
4
8
0.25
16
16
16