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BOSCH REXROTH
R928038781
Clogging Indicators

Clogging Indicators

$185.33

BOSCH REXROTH

MATERIAL:  R928038781

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.

01

02

03

04

05

WO-D01

Design

01

Maintenance indicator, mech./visual, pressure differential, port M20x1.5

WO-D01

Switching pressure

02

max. operating pressure
160 bar

max. operating pressure
450 bar

0.8 bar

0,8

1.5 bar

1,5

2.2 bar

2,2

5.0 bar

5,0

8.0 bar

8,0

Seal

03

NBR

M

FKM

V

Maximum operating pressure

04

Switching pressure 1.2 bar, 450 bar

450

Switching pressure 5 bar, 450 bar

450

Supplementary information

05

Without

without information

Type / version

WO-D01-0,8-M-160 WO-D01-0,8-V-160 WO-D01-1,5-M-160 WO-D01-1,5-V-160 WO-D01-2,2-M-160 WO-D01-2,2-V-160 WO-D01-2,2-M-450 WO-D01-2,2-V-450 WO-D01-5,0-M-450 WO-D01-5,0-V-450 WO-D01-8,0-M-450 WO-D01-8,0-V-450

Type of pressure measurement

Pressure differential

Operating pressure

max.

pmax

bar

160 450

Switching pressure

bar

0.8 1.5 2.2 5 8

Switching pressure tolerance

bar

± 0.15 ± 0.2 ± 0.3 ± 0.5 ± 0.8

Operating temperature range

°C

-30 … +100

Material

Aluminium Brass

Material

Seals

NBR FKM NBR FKM NBR FKM NBR FKM NBR FKM NBR FKM

Tightening torque

max.

MA max

Nm

50

For applications outside these parameters, please consult us!

Pressure differential indicator with mounted switching element M12x1

Dimensions in mm

technical illustration-R928038781-Clogging Indicators

1

Mechanical optical maintenance indicator; max. tightening torque MA max = 50 Nm

2

Switching element with locking ring for electrical maintenance indicator (rotatable 360°); M12x1, 4-pole round plug-in connection

4

Housing with three LEDs: 24 V =green: Stand-by
yellow: Switching point 75 %
red: Switching point 100 %

5

Optical indicator with memory function

6

16x1 DIN 471 locking ring, Material no. R900003923

7

Name plate

Pressure differential indicator with mounted switching element EN-175301-803

Dimensions in mm

technical illustration-R928038781-Clogging Indicators

1

Mechanical optical maintenance indicator; max. tightening torque MA max = 50 Nm

3

Switching element with locking ring for electrical maintenance indicator (rotatable 360°); EN 175301-803 rectangular plug-in connection

5

Optical indicator with memory function

6

16x1 DIN 471 locking ring, Material no. R900003923

7

Name plate

Notes:

Presentation contains mechanical optical maintenance indicator (1) and electronic switching element (2) (3).

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

technical illustration-R928038781-Clogging Indicators

Use

Gas

Dust

Device group and category according to directive 94/9/EC

Type of protection

max.

max.

max.

Surface temperature

max.

°C

Inner capacity

Ci

Inner inductivity

Li

Dust accumulation

max.

mm

Standard for explosion protection