Piston Type Pressure switch Type HED 1 Series 40 for Rexroth
To adjust the switching pressure, the name plate must first be removed and the locking screw loosened.The switching pressure is set by rotating the adjustment screw. Finally, the adjustment screw must be secured by the locking screw and the name plate refitted.
Product features
◉ Sandwich plate design
Hydro-electric pressure switches type HED 1 are piston pressure switches.
Type HED 1 pressure switches have the task of switching on or off an electrical circuit dependent on pressure.The live electrical terminals are covered by an isolating strip.
◉ Adjustment of the switching pressure
To adjust the switching pressure, the name plate must first be removed and the locking screw loosened.The switching pressure is set by rotating the adjustment screw. Finally, the adjustment screw must be secured by the locking screw and the name plate refitted.
Technical data
(for applications outside these parameters, please consult us!)
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Pressure fluid |
Mineral oil or Phosphate ester |
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temperature range（°C） |
-30 to +80 |
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Viscosity range（mm²/s） |
10 to 800 |
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Switching accuracy (repeatability) |
＜ ±to 2 % of set pressure |
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Switching frequency |
HED1KA40B/ |
up to 300 cycles/min |
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HED10A40B/. |
up to 50 cycles/min（briefly also 100 cycles/min ） |
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Pressure at drain port（MPa） |
up to 2 |
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Settable ranges for HED 1 KA 40B/. |
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Pressure rating |
Max. operating pressure briefly |
Recovering pressure |
Action pressure |
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min. |
max. |
min. |
max. |
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10 |
60 |
0.3 |
9.2 |
0.6 |
10 |
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35 |
60 |
0.6 |
32.5 |
1.0 |
35 |
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50 |
60 |
1.0 |
46.5 |
2.0 |
50 |
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Settable ranges for HED10A40B/. |
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Pressure rating |
Max. operating pressure briefly |
Recovering pressure |
Action pressure |
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min. |
max. |
min. |
max. |
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5 |
8 |
0.2 |
4.5 |
0.35 |
5 |
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10 |
35 |
0.3 |
8.2 |
0.8 |
10 |
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35 |
35 |
0.6 |
29.5 |
2.0 |
35 |
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Electrical connection |
cable gland |
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Contact loading |
AC voltage |
460V, 15A |
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DC voltage |
40V, 1.0A / 125V, 0.4A / 250V, 0.2A |
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Insulation to DIN 40 050 |
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Weight（kg） |
1.2 |
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Notice |
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The fluid must be filtered. Minimum filter fineness is 20 μm. |
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The tank must be sealing up and an air filter must be installed on air entrance. |
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Products without subplate when leaving factory, if need them, please ordering specially. |
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Valve fixing screws must be high intensity level (class 10.9). Please select and use them according to the parameter listed in the sample book. |
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Roughness of surface linked with the valve is required to Ra 0.8 μm. |
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Surface finish of mating piece is required to 0.01/100mm. |
Switching pressure difference
Switching pressure difference - pressure switches with or without drain port
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