PRESSURE SWITCH HED 8 OH-2X/50K14KW
Manufacturer: Bosch Rexroth
Material #: R901107394
Model : HED 8 OH-2X/50K14KW
***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth HED 8 OH-2X/50K14KW (R901107394) is a high-precision hydraulic pressure switch designed for monitoring and controlling pressure in hydraulic systems. This piston-type pressure switch features a micro switch with both normally closed (NC) and normally open (NO) contact functions, allowing for the potential-free switching of currents ranging from milliamps to 2.5 amps. Its small hysteresis and high repetition accuracy of less than 1% of the set pressure point ensure reliable operation.
The device has a robust flange connection conforming to ISO standards, making it suitable for various mounting configurations including subplate mounting, pipeline installation, or as a vertical stacking element with sandwich plates. It offers multiple adjustment types such as spindle with or without protective cap, spindle with scale, lockable rotary knob with scale, and comes without a mating connector. The electrical connection is facilitated through a large cubic connector with an M12 x 1 connector according to DIN EN standards.
Rated for a maximum operating pressure of 315 bar, the HED 8 series includes several models with varying pressure ratings from 50 to 315 bar to accommodate different application requirements. The unit's NBR seals are compatible with hydraulic fluids HL, HLP, HLPD, HVLP, and HVLPD. For safety and global application, it carries CE marking in accordance to the Low Voltage Directive of the EU and is also CCC-certified and UL recognized.
This particular model is part of component series X which indicates its advanced design features aimed at enhancing performance and reliability. It's ideal for applications that demand precise control over hydraulic system pressures while ensuring protection against overpressure situations or sudden pressure drops that could lead to mechanical damage.
$611.00 USD
Availability: Backordered
Ships from US
Qty:
Delivered as early as November 19, 2026
$641.55 USD
Availability: Backordered
Ships from CA
Qty:
Delivered as early as November 19, 2026
This product is eligible for factory repair.
50 bar, micro switch with NC contact/NO contact function, device connector DIN EN 175301-803 (large cubic connector)
Potential-free switching of currents from 1 mA to 2.0 A. Small hysteresis, depending on the set switching point. High repetition accuracy < 1% of the set pressure
Unpacked Weight: 0.68 kg
For subplate mounting/pipeline installation For flange connection according to ISO 16873 As vertical stacking element in connection with sandwich plates according to ISO 4401 5 pressure ratings 4 adjustment types:– Spindle with/without protective cap– Spindle with scale, with/without protective cap– Rotary knob with scale– Lockable rotary knob with scale Electrical connection– with valve plug-in connector design A (large cubic connector)– with M12 x 1 connector Micro switch with NC/NO contact function Potential-free switching of currents from 1 mA to 2 A UL approval for pressure ranges up to 350 bar
The hydro-electric pressure switch type HED 8 is a piston type pressure switch. It basically comprises of housing (1), installation kit with piston (2), compression spring (3), adjustment element (4) and micro switch (5).
If the pressure to be monitored is below the set value, the micro switch (5) is operated. The pressure to be monitored is applied via the nozzle (7) at the piston (2). The piston (2) is supported by the spring plate (6) and acts against the continuously adjustable force of the compression spring (3). The spring plate (6) transmits the movement of the piston (2) onto the micro switch (5) and releases the latter when the set pressure is reached. This switches the electric circuit on or off, depending on the circuit set-up. The mechanical positive stop of the spring plate (6) protects the micro switch (5) in case of a sudden pressure drop from mechanical destruction and, in case of overpressure, prevents solid compression of the compression spring (3).
Notices:
In order to increase the life cycle, the pressure switch should be mounted with low vibrations and protected from hydraulic pressure surges.
Type HED 8 OH-2X/…K14
Type HED 8 OH-2X/…K14S
Type HED 8 OP-2X/…K14A
Type HED 8 OP-2X/…K14AS
Type HED 8 OA-2X/…K14KW
Type HED 8 OA-2X/…K14KS
Switching pressure differential (measured with HLP46, ϑOil = 40 ±5 °C)
Pressure rating 50 bar
Pressure rating 100 bar
Pressure rating 200 bar
Pressure rating 350 bar
Pressure rating 630 bar
Notices:
The switching pressure differential may increase within the course of the life cycle due to the deterioration of the oil quality and the number of load cycles.
|
"K14" without indicator light |
"K14" with indicator light |
"K35" |
|
|
|
|
Switching function Terminals 1-2: In case of pressure increase, contact opens Terminals 1-3: In case of pressure increase, contact closes |
Switching function Terminals 1-2: In case of pressure increase, contact opens Terminals 1-4: In case of pressure increase, contact closes |
|
Notice:
For general information on safety, installation or commissioning, see operating instructions.
Type HED 8 …K14
Dimensions in mm
|
1 |
Adjustment type "KW" |
|
2 |
Adjustment type "KS" |
|
3 |
Adjustment type "–" |
|
4 |
Adjustment type "S" |
|
5 |
Adjustment type "A" |
|
6 |
Adjustment type "AS" |
|
7 |
Seal ring |
|
8 |
Space required to remove the key |
|
9 |
Space required to remove the mating connector |
|
10 |
Hexagon SW27 (with adjustment type "KS") |
|
11 |
Internal hexagon SW10 |
|
12 |
Mating connector without circuitry for connection "K14” (separate order) |
|
13 |
Mating connector with circuitry for connection "K14” (separate order) |
|
17 |
Valve mounting screws (separate order) for type HED 8 OH… 2 hexagon socket head cap screws, metric ISO 4762 - M5 x 55 - 10.9-flZn-240h-L Friction coefficient μtotal = 0.09 to 0.14, Tightening torque MA = 6+0.5 Nm, Material no. R913000261
|
|
18 |
Maximum diameter of the connection bore of the counterpart (type HED 8 OH…) |
|
19 |
Maximum diameter of the connection bore of the counterpart (type HED 8 OP…) |
|
20 |
Valve mounting screws (separate order) for type HED 8 OA… and …OP… 2 hexagon socket head cap screws, metric ISO 4762 - M5 x 50 - 10.9-flZn-240h-L Friction coefficient μtotal = 0.09 to 0.14, Tightening torque MA = 7+0.5 Nm, Material no. R913000064 |
Type HED 8 …K35
Dimensions in mm
|
1 |
Adjustment type "KW" |
|
2 |
Adjustment type "KS" |
|
3 |
Adjustment type "–" |
|
4 |
Adjustment type "S" |
|
5 |
Adjustment type "A" |
|
6 |
Adjustment type "AS" |
|
7 |
Seal ring |
|
8 |
Space required to remove the key |
|
9 |
Space required to remove the mating connector |
|
10 |
Hexagon SW27 (with adjustment type "KS") |
|
11 |
Internal hexagon SW10 |
|
14 |
Mating connector for connection "K35" (separate order) |
|
15 |
Mating connector suitable for "K35", angled (separate order) |
|
16 |
Mating connector for connection "K35", with cable (separate order) |
|
17 |
Valve mounting screws (separate order) for type HED 8 OH… 2 hexagon socket head cap screws, metric ISO 4762 - M5 x 55 - 10.9-flZn-240h-L Friction coefficient μtotal = 0.09 to 0.14, Tightening torque MA = 6+0.5 Nm, Material no. R913000261
|
|
18 |
Maximum diameter of the connection bore of the counterpart (type HED 8 OH…) |
|
19 |
Maximum diameter of the connection bore of the counterpart (type HED 8 OP…) |
|
20 |
Valve mounting screws (separate order) for type HED 8 OA… and …OP… 2 hexagon socket head cap screws, metric ISO 4762 - M5 x 50 - 10.9-flZn-240h-L Friction coefficient μtotal = 0.09 to 0.14, Tightening torque MA = 7+0.5 Nm, Material no. R913000064 |
Type HED 8 OH… in vertical stacking NG6
|
1 |
Pressure switch HED 8 OH… for use in stacking assemblies (can be assembled staggered by 4 x 90°) |
|
2 |
Sandwich plate type HSZ 06A... for use of the pressure switch as stacking element |
|
3 |
Space required to remove the key |
|
4 |
Space required to remove the mating connector |
|
Mating connector |
H1 |
H2 |
H3 |
|
Port “K14”, without circuitry |
87 |
65 |
15 |
|
Port “K14”, with circuitry |
92 |
70 |
15 |
|
Port “K35”, angled |
92 |
70 |
10 |
|
Port “K35”, straight |
111 |
89 |
10 |
Type HED 8 OH… in vertical stacking NG10
|
1 |
Pressure switch HED 8 OH… for use in stacking assemblies (can be assembled staggered by 4 x 90°) |
|
2 |
Sandwich plate type HSZ 10A... for use of the pressure switch as stacking element |
|
3 |
Space required to remove the key |
|
4 |
Space required to remove the mating connector |
|
Mating connector |
H1 |
H2 |
H3 |
|
Port “K14”, without circuitry |
100 |
65 |
15 |
|
Port “K14”, with circuitry |
105 |
70 |
15 |
|
Port “K35”, angled |
105 |
70 |
10 |
|
Port “K35”, straight |
124 |
89 |
10 |
Mating connectors for mechanical pressure switches with connector “K14”, without circuitry, standard
4P Z14
Mating connectors for mechanical pressure switches with connector “K14”, without circuitry, standard
4P Z14
For mechanical pressure switches with connector “K14”, according to EN 175301-803 and ISO 4400, 3-pole + PE, “large cubic connector”Data sheet
Spare parts & repair
Mating connectors for mechanical pressure switches with connector “K14”, with indicator lights at connections 2 and 3
4P Z15L
Mating connectors for mechanical pressure switches with connector “K14”, with indicator lights at connections 2 and 3
4P Z15L
For mechanical pressure switches with connector “K14”, according to EN 175301-803 and ISO 4400, 3-pole + PE, “large cubic connector”Data sheet
Spare parts & repair
Mating connectors for sensors and valves with connector “K24”, “K35” and “K72”, M12 x 1
4P Z24
Mating connectors for sensors and valves with connector “K24”, “K35” and “K72”, M12 x 1
4P Z24
For sensors and valves with connector “K24”, “K35” and “K72” Mating connectors M12, 4-pole, line cross-section 0.75 mm2Data sheet
Spare parts & repair
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