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Technical data
NAMUR sensor (Specified for EX zones)
Fig. 30
Specification
Nominal voltage (Ri ~ 1 kΩ)
Power consumption - active surface uncovered
Power consumption - active surface covered
Rated switching distance
Cable colour
blue
brown
Visual display
10.11 HA4 safety relief valve
Pressure stage *
Opening pressure **
* Marking on the indicating scale without valve housing
** back pressure generated by the pump when the pressure side is blocked ± 3 bar
10.12 Filling volumes
Tab. 13: Hydro HA4 / HP4
Required oil volume, approx.
Type
Simplex:
Double head:
56
1
Seal
1
2
Top part
2
3
Separating diaphragm
3
3a Spring seat
3a
4
Plate
5
Body
6
Spring
4
5 ... 25 V DC, in accordance with NAMUR and/or DIN 60947-5-6, poten‐
5
tial-free design.
6
Install the sensor in accordance with the chapter "Instal‐
lation, electrical". Refer to its documentation.
The sensor is of type NJ1.5-8GM-N.
P_HY_0015_SW
For stainless steel dosing heads. Manometer with red / green areas.
Opening pressure at the respective pressure stages:
7 bar
10 bar
8 bar
14 bar
Value
8 V DC
> 3 mA
< 1 mA
1.5 mm
Polarity
-
+
16 bar
25 bar
25 bar
36 bar
5.8 l
6.8 l
40 bar
50 bar
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