BOSCH REXROTH
R928038771
Clogging Indicators
Clogging Indicators
BOSCH REXROTH
MATERIAL: R928038771
SUMMARY: Clogging Indicators
Due to extremely high demand, please call 888-651-5712 for availability
By default, the Rexroth filters are supplied with a mechanical/visual maintenance indicator (WO). The electronic switching element (WE) is available as accessory and compatible with all mechanical/visual maintenance indicators. The electronic switching element is attached to the visual maintenance indicator and fixed by means of a locking ring. The electronic maintenance indicator is not dependent on the nominal pressure of the filter.
The increasing back pressure and/or pressure differential pushes a piston (1) against a spring (2) upwards. The solenoid (3) mounted on the piston is moved together with the piston. The visual pin (4) may take two valid positions. If the position of the piston (1) with solenoid (3) is below the nominal pressure of the maintenance indicator, the visual pin remains in retracted “rest position”. Upon first exceedance of the nominal pressure, the position of the visual pin (5) is changed rapidly into the second possible “On condition” by repellence of the solenoid of the pin (5) to the solenoid of the piston (3). The pin will permanently remain in this extended position, even visible after machine switch-off (or pressure drop, cold start) (memory function). It has to be acknowledged.
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01 |
02 |
03 |
04 |
05 |
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WO-S01 |
‒ |
‒ |
‒ |
10 |
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Design |
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01 |
Maintenance indicator, mech./visual, back pressure, port M30x1.5 |
WO-S01 |
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Switching pressure |
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02 |
Aluminium |
Polyamide |
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0.8 bar |
• |
0,8 |
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1.5 bar |
• |
1,5 |
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2.2 bar |
• |
• |
2,2 |
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Seal |
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03 |
NBR |
M |
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FKM |
V |
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Maximum operating pressure |
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04 |
10 bar |
10 |
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Supplementary information |
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05 |
Without |
without information |
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Back pressure indicator made of plastic (only with S01-2.2) |
-PA |
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Type / version |
WO-S01-0,8-M-10 | WO-S01-0,8-V-10 | WO-S01-1,5-M-10 | WO-S01-1,5-V-10 | WO-S01-2,2-M-10 | WO-S01-2,2-V-10 | WO-S01-2,2-M-10-PA | WO-S01-2,2-V-10-PA | |||
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Type of pressure measurement |
Back pressure | ||||||||||
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Operating pressure |
max. |
pmax |
bar |
10 | |||||||
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Switching pressure |
bar |
0.8 | 1.5 | 2.2 | |||||||
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Switching pressure tolerance |
bar |
± 0.15 | ± 0.2 | ± 0.3 | ± 0.44 | ± 0.3 | |||||
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Operating temperature range |
°C |
-30 … +100 | |||||||||
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Material |
Aluminium | PA6.6 | |||||||||
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Material |
Seals |
NBR | FKM | NBR | FKM | NBR | FKM | NBR | FKM | ||
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Tightening torque |
max. |
MA max |
Nm |
50 | |||||||
For applications outside these parameters, please consult us!
Connection of the electronic switching elements
By default, the filter is equipped with mechanical/visual maintenance indicator WO (4). The electronic switching element (2) is attached to the mechanical/visual maintenance indicator (1) and fixed by means of a locking ring (6).
What must generally be observed with Rexroth filters:
– Components must always be assembled without tension stress.
– The filter housing must always be grounded.
When has the filter element to be replaced or cleaned?
– The filter element is to be exchanged after initial commissioning of the system.
– Upon start-up in cold condition, the red pushbutton of the visual maintenance indicator (4) may jump out and an electrical signal is output via the switching element. Only push the red pushbutton in again after the operating temperature has been reached. If it jumps out again immediately or if the electric signal has not gone out at operating temperature, the filter element must be exchanged or cleaned respectively.
– The filter element should be replaced or cleaned after max. 6 months.
Use in potentially explosive areas according to directive 94/9/EC (ATEX)
According to DIN EN 60079-11, the electronic maintenance indicators WE-1SP-M12x1 are simple, electronic operating equipment not having an own voltage source. This simple, electronic operating equipment may - according to DIN EN 60079-14 - in intrinsically safe electric circuits (EEx ib) be used in systems for device group II, category 2G (zone 1) and category 3G (zone 2) without marking and certification. The operating equipment is assigned to explosion group II B and temperature class T5.
When using Rexroth filters in potentially explosive areas, equipotential bonding has always to be ensured.
Possible circuit according to DIN EN 60079-14
