SGB DLR-P User manual

Overpressure leak detector
DLR-P
Z – 65.26-349
Documentation DLR - P
No.: 604 202
Issue:11/2009
SICHERUNGSGERÄTEBAU GMBH
Hofstraße 10
57076 Siegen

Overview – Design variant
OVERPRESSURE LEAK DETECTOR DLR.. - Ü-1 -
Overview of the design variants
The overpressure leak detectors of the DLR-series are available in different designs which are
described in detail by the suffix characters.
DLR-… …. PM “Manometer“, the leak detector is equipped
with a digital pressure display in the hous-
ing cover.
“Protected“ construction of the leak detector in a
weatherproof housing.
“Numerical value”, for the alarm pressure of the leak
detector in bar.
The alarm pressures range from 1 bar to 18 bar.
“G = gas(bottle)“, a pressure gas bottle is used for
pressure generation, normally nitrogen.
“P = Pump“, a pump integrated in the leak detector is
used for pressure generation.
”GS = gas (-bottle)”, a static pressure generator must
be brought to the site since the leak detector does not
have a pump or automatic feed mechanism.
“Pressure Leak detector Pipe”, the leak detector operates
with overpressures towards the atmosphere and is de-
signed for application on double-walled pipes.
11/09/2006 Your partner for Leak Detection Technology Sicherungsgerätebau GmbH, Siegen
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Content
1 Technical description for the overpressure leak detector DLR-P 13 pages
2 Drawings to the technical description 7 pages
3 Appendix to the technical description 4pages
3.1 Appendix TD
3.2 Appendix TF
3.3 Statement
4 Declaration of conformity 1 page
5 Measuremt and Drilling 2 pages
6 Working sheet AB-820 500 pneumatic connections 2 pages
7 Approval of the DIBT 5 pages
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Contents Page
1 Subject 2
2 Field of application 2
2.1 Requirements for interstitial spaces 2
2.2 Pipes 2
2.3 Fittings 2
2.4 Materials carried in the pipes / leak detection medium 2
3 Description of functions and operation 3
3.1 Switching values and pressure values 3
3.2 Normal operation 4
3.3 Functions in the event of a leak 4
3.4 Air drying / dry filter 4
3.5 Description of the display and control elements 5
4 Installation and assembly instructions 5
4.1 General notes 5
4.2 Personal safety equipment 6
4.3 Installation of the leak detector 6
4.4 Installation of the connecting lines (leak detector -> interstitial space) 6
4.5 Installation of the dry filter 7
4.6 Electrical connections 7
4.7 Example installation 7
5 Commissioning / repairs 7
6 Operating instructions 8
6.1 General notes 8
6.2 Maintenance 8
6.3 Intended use 9
6.4 Functional tests 9
6.5 Alarm / fault 12
7 Disassembly 12
8 Marking 12
9 Abbreviations 13
DIAGRAMS:
Location of the test cocks P – 078 000
Installation example 1 M1 – 078 000
Installation example 2 M2 – 078 000
Installation example 3 M3 – 078 000
Installation example 4 M4 – 078 000
Current flow diagram SL – 853 600
Test device P – 115 395
APPENDIX:
TD Technical data TD – 1
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1. Subject
Overpressure leak detector for double walled pipes, double walled fittings or a combination of
the above with air used as the leak detection medium.
DLR-P .. The dots are used in place of the alarm pressure. The alarm pressure may also be
followed by letters to describe the design variant of the leak detector in more detail.
2. Field of application
2.1. Requirements for interstitial spaces
•Verified pressure resistance of the interstitial spaces (see section 3.1)
•Verification of suitability of the interstitial space (for Germany: Allgemeine bauaufsichtliche
Zulassung (General Building Authority Approval), approval in individual cases).
•Tightness of the interstitial space (see section 6.4.7)
•The number of interstitial spaces to be monitored depends on the overall volume of the
interstitial space. According to EN 13160, this must not exceed 10m3. In order to make it
possible to verify the tightness of the interstitial space, we recommend that a value of 4 m3is
not exceeded.
The length of pipe which is to be monitored (per pipe branch) should not exceed 2500 m,
and it should comply with the approval requirements of the pipe.
2.2. Pipes
Double walled pipes (overground and underground) made of metal or plastic, designs
manufactured in the plant or on-site.
For Germany: More far reaching requirements for double walled pipes may result from TRbF 50,
the DIBt approval principles or EN 13160.
2.3. Fittings
Double walled fittings (overground and underground) made of metal or plastic, designs
manufactured in the plant or on-site.
For Germany: with Allgemeine bauaufsichtliche Zulassung (General Building Authority
Approval), provided this is not part of the approval of the pipeline.
2.4. Products conveyed in the pipes / leak detection medium
•Liquids which are hazardous to waters with a flash point > 55°C
•Liquids which are hazardous to waters with a flash point < 55°C
ONLY for double walled pipes / fittings with walls which are permeation-proof on the side of
the material being conveyed.
On pipes / fittings which are permanently filled with liquid, it must be ensured that the
equipment carrying the product (delivery pumps, ...) is suitable for zone 0, as air is forced
into the product in the event of a leak.
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•The product being conveyed must not react with the leak detection medium.
•The resistance of the pipes / fittings to the material being conveyed must be verified by third
parties (e.g. operator, manufacturer of the pipeline ...).
3. Description of functions and operation
The overpressure leak detector DLR-P monitors both walls of a pipe/fitting for leaks. The
monitoring pressure is high enough to ensure that leaks in the inner or outer wall are indicated
through a pressure loss.
In order to build up the pressure, air is sucked in from the outside by the integrated pump via a
dry filter and then pumped to the interstitial space(s).
The dry filter dries the outside air to a relative humidity of approximately 10%. The drying
process is necessary in order to eliminate any accumulation of moisture or condensation in the
interstitial space. Used dry filter cartridges should be regenerated or replaced.
3.1. Switching values and pressure values in bar
Type
DLR-P pDP
[bar] pAE_ON [bar] pPA_OFF
[bar] Switch position of the
dip switch PÜDV 11
[bar] pTEST
[bar]
1.1 < 0.1 > 1.1 < 1.45 1.6 ±0.07 ≥2.0
1.5 < 0.5 > 1.5 < 1.9 2.2 ±0.10 ≥2.5
2.0 < 1.0 > 2.0 < 2.4 2.7 ±0.10 ≥3.0
2.3 < 1.3 > 2.3 < 2.8 3.1 ±0.10 ≥3.5
2.5 < 1.5 > 2.5 < 2.9 3.2 ±0.10 ≥3.5
3.0 < 2.0 > 3.0 < 3.4 3.8 ±0.10 ≥4.2
_Special values agreed between SGB and
the customer.
pDP Max. delivery pressure in the inner pipe
pAE "Alarm ON" switching value – an alarm is triggered at the latest when this value is
reached.
pAA "Alarm OFF" switching value – the alarm is cancelled when this value is exceeded.
The switching value "Alarm OFF" is approximately 100 mbar higher than the switching
value "Alarm ON" (pAA = pAE + ~100 mbar)
1In the table, the opening pressure of the overpressure valve is indicated at which the volumetric flow of the pump is
stopped. The response pressure (initial opening) is lower.
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pPA "Pump OFF“ switching value (=setpoint pressure)
pPE "Pump ON" switching value
The switching value "Pump ON“ is around 100 mbar lower than the switching value
"Pump OFF" (pPE = pPA - ~100 mbar)
pÜDV1 Opening pressure of overpressure valve (on the interstitial space side)
The overpressure valves can be omitted if the test pressure of the interstitial space is ≥
3 bar (type 1.1 and 1.5) or ≥10 bar (type 2.0 to 3.0).
pTEST Minimum test pressure of the interstitial space
3.2. Normal operation
The leak detector is connected via the connecting line(s) to the interstitial space(s). The
overpressure generated by the pump is measured via a pressure sensor and regulated.
When the operating pressure (Pump OFF) is reached the pump is switched off. Due to leaks in
the leak detection system which are unavoidable, the pressure will start to slowly rise again.
When the switching pressure "Pump ON" is reached the pump is switched on and the system
builds operating pressure back up again.
During normal operation, the leak detector fluctuates between these two pressure values, with
short run-up times and longer standstill times which depend on the tightness and temperature
fluctuations of the overall plant.
3.3. Functions in the event of a leak
If a leak occurs on the inside wall or the outside wall then air will escape from the interstitial
space. The pressure will drop until the pump is switched on in order to restore operating
pressure. If the volumetric flow escaping through the leak is greater than the (limited) delivery
rate of the pump then the pressure in the system drops and the pump runs in continuous
operation.
Any increase in the size of the leak leads to a further pressure loss until eventually the alarm
pressure is reached. At this point the system will generate visual, audible and potential-free
alarm outputs.
3.4. Air drying / dry filter
The air supplied to the interstitial space is passed through a dry filter in the intake line. The dry
filter dries the air to a relative humidity of around 10% in order to prevent corrosion and
accumulation of condensation in the interstitial space.
The dry filter is designed to last for a year provided the equipment is used for its proper
intended use and no additional temperature fluctuations occur.
Initially the dry filter is an orange colour, but this fades to a colourless (or green) state when the
filter has been used up. Once the filter cartridge has been used up it should be replaced or
regenerated.
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3.5 Description of the display and control elements
3.5.1 Display element states (signal lamps) for type DL ..
Signal lamp Operating status Alarm status Alarm, audible alarm
signal acknowledged Device fault
OPERATION:
green ON ON ON ON
ALARM: red OFF ON FLASHING ON
3.5.2 Operating functions via pushbuttons
Switching off the acoustic alarm signal:
Briefly press the "Audible alarm" button once – the audible alarm signal is then switched off and
the LED flashes.
Pressing the button again will cause the audible signal to be switched on.
(This function is not available in normal operation or during malfunctions.)
Testing the visual and audible alarm signal
Press the "Audible alarm" button and keep it pressed (approx. 10 seconds) – the alarm signals
are triggered until the button is released again.
This test is only possible if the pressure in the system has exceeded the "Alarm OFF" pressure
level.
Testing the tightness of the monitored system
Press the "Audible alarm signal" button and keep it pressed until the "Alarm" signal lamp flashes
at high speed, then release the button. A value for the tightness is indicated through illumination
of the “Alarm” signal lamp. (see Appendix DP)
For this test the leak detector must have performed at least 1 automatic feed interval in normal
operation (i.e. without being filled by an assembly pump) in order to obtain a valid result.
4. Installation and assembly instructions
4.1. General notes
(1) Installation and assembly must only be performed by qualified companies2.
(2) The relevant accident prevention regulations of the Wasserhaushaltsgesetz (Water
Resources Act, WHG) must be complied with.
(3) Explosion protection requirements must be satisfied (where necessary), such as laws on
the basis of the European Directive 1999/92/EG and/or other applicable codes.
(4) A test valve should be provided at the leak detector opposite end of the pipe(s)/fitting(s).
(5) Before accessing control shafts, measure the vapour-air mixture and the O2-level.
2In Germany: Companies who have the status of a “qualified company” in the sense of §19I of the
Wasserhaushaltsgesetz (Water Resources Act, WHG) 19l, who are qualified to carry out installations of
leak detection systems and can demonstrate proof of expertise and knowledge in relation to fire safety
and explosion protection.
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4.2. Personal safety equipment
The parts listed here apply in particular to safety when working on plants which may pose an
potentially risk of explosion.
If work is carried out in industries in which it must be assumed that an explosive atmosphere is
present then the following items of equipment are required as an absolute minimum:
•Suitable clothing (risk of a build-up of electrostatic charge)
•Suitable tools (compliant with EN 1127)
•A suitable gas warning device which is calibrated for the existing vapour-air mixture (work
should only be performed at a concentration of 50% below the lower explosion limit)3
•Measuring device for determining the oxygen content of the air (Ex / O meter)
4.3. Installation of the leak detector
(1) Generally in a wall-mounted installation with wall plugs and screws.
(2) In a dry room, or out in the open in a suitable housing.
(3) NOT in areas with a potentially risk of explosion.
(4) The distance between the leak detector and the interstitial space should be kept as short
as possible (refer also to the next section).
4.4. Installation of the connecting lines (leak detector -> interstitial space)
(1) Metal (generally copper) or plastic tubes with a pressure resistance corresponding to at
least the test pressure of the interstitial space – also applies to fittings and unions.
(Observe the temperature range, particularly when using plastic materials.)
(2) Clear width at least 6 mm.
(3) 50 m should not be significantly exceeded – but if so: use a tube with a greater clear width
with corresponding bridging pieces.
(4) The full cross-section must be retained. Pinching and kinking4are not permitted.
(5) Metal or plastic tubes underground, or plastic tubes routed overground should be routed
inside a conduit.
(6) The conduit should be sealed gas-tight.
(7) The pressure and measuring lines can be combined together underneath the leak detector
via pulsation damper 107 (see installation examples).
(8) Avoid any build-up of electrostatic charge (e.g. when drawing in lines).
(9) For details of the connection technology to be used refer to Work Sheet AB-820 500 (see
Information).
3Other %-specifications may result from works-specific or German Land-specific regulations.
4If required, commercially available shaped sections should be used for plastic tubes (pre-defined
bending radii)
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4.5. Installation of the dry filter
(1) Preferably close to the leak detector.
(2) Vertical with the intake opening facing down, using the enclosed installation materials.
(3) The dry filter and in the intake connection port of the leak detector should be connected via
a PVC hose (or similar).
4.6. Electrical connections
(1) Power supply: in accordance with the imprint on the type plate.
(2) Hard wired, i.e. no plug-in or switchable connections.
(3) The regulations of the electricity supply companies must be satisfied5.
(4) Terminal assignment: (see also SL-853 600)
1 / 2 Mains connection
3 / 4 Assigned (to the internal pump)
5 / 6 External signal (in the event of an alarm, mains voltage is present here - it is
switched off by pressing the "Audible alarm" button).
11 / 12 Potential-free contacts (open in the event of an alarm and in the event of a power
loss)
4.7. Example installation
Example installations are shown in the Appendix.
5. Commissioning / repairs
(1) Note the requirements in section 4.
(2) If a leak detector is taken into operation on a pipe (fitting) which is already in operation,
then special protection measures need to be put in place (e.g. checking that the leak
detector and/or the interstitial space is free of gas). Further measures may depend upon
the local conditions and should be assessed by qualified personnel.
(3) Once the pneumatic connections have been made, make the electrical connections.
(4) Check that the signal lamps for "Operation" and "Alarm" light up and that the audible alarm
signal sounds, if necessary switch off the alarm.
(5) Connect the three-way cock 21 in the position "III", connect a gauge. (Drawing: P-078 000)
(6) The leak detection system should be supplied with the operating pressure according to the
table on page 3. (Use of an assembly pump, with sufficiently dimensioned dry filter or a
nitrogen pressure cylinder).
5In Germany: compliance is also required with the VDE regulations.
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(7) Build-up of pressure with the assembly pump or the pressure cylinder (observe the
pressure settings) - can be performed directly via the pressure line or via the three-way
cock 20 (position IV).
Note: If no pressure is built up with the assembly pump (or pressure gas canister)
connected, then the leak should be located and rectified (if required check that the delivery
rate of the assembly pump and the settings of the pressure reducer are correct).
(8) Once the operating pressure of the leak detector has been reached (pressure generation
inside the leak detector switches off), reconnect the high-pressure line and/or set both
cocks to "I", remove the pressure measuring instrument.
(9) Functional test according to section 6.4.1.
6. Operating instructions
6.1. General notes
(1) It can be assumed that the system will work correctly without any problems if the leak
detection system is installed correctly without leaks.
(2) If the pump comes on frequently or runs continuously then this indicates that leaks are
present which will require attention within due course.
(3) If an alarm is triggered locate and rectify the cause quickly.
(4) Explosion protection requirements must be satisfied (where necessary), such as laws on
the basis of the European Directive 1999/92/EG and/or other applicable codes.
(5) Disconnect the power supply to the leak detector whenever performing servicing work on it.
(6) The signal lamp "Operation" goes out if there is a break in the current supply. Alarm signals
are sent out via the potential-free relay contacts (if used).
After the interruption in the current supply, the green signal lamp comes back on and the
alarm signal which is output via the potential-free contacts is cancelled (unless the
pressure has dropped below the alarm pressure while the current supply was interrupted.)
(7) The filter cartridge should be replaced or regenerated when it changes colour from orange
to having no colour (or green, depending on the type of drying material).
6.2. Maintenance
6.2.1 Performed by the operator
(1) The dry filter should be checked at regular intervals6. The filter cartridge should be
replaced or regenerated when it changes colour from orange to having no colour (or
green).
6A gap of at least 2 months is recommended.
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6.2.2 Maintenance work and functional tests performed by qualified persons7.
(1) Testing once a year for functional and operational reliability and safety.
(2) Test scope according to section 6.4.
(3) It should also be checked that the conditions in sections 4, 5 and 6.2 are satisfied.
6.3. Intended use
•For double walled pipes/fittings
•Vapour-air mixtures which may potentially arise due to
– the liquid being conveyed,
– the liquid being conveyed in conjunction with air/air moisture or condensate
– the liquid being conveyed in conjunction with the materials used
must be classifiable in temperature classes T1 to T3 and in explosion group II A or II B.
For this type of liquid, the wall on the side of the product beeing conveyed must be
resistant to permeation.
•The feed pressure (in the inner pipe) must be at least 1 bar lower than the minimum alarm
pressure.
•The system must be earthed in accordance with applicable regulations8
•Tightness of the leak detection system should be ensured according to section 6.4.7.
•The leak detection unit must be installed outside the potentially explosive-area.
•Conduits for connecting lines must be sealed gas-tight.
•The leak detector should be (electrically) connected in a way which cannot be switched off.
6.4. Functional tests
Testing of the functional and operational safety and reliability should be performed
•at every commissioning
•in accordance with the intervals laid out in section 6.29
•whenever a fault is rectified.
6.4.1 Test scope
(1) If necessary the work to be performed should be discussed with the person who is
responsible on-site.
(2) Observe the safety information on handling the products beeing conveyed.
(3) Replacement or regeneration of the filter cartridge.
7In Germany: by a trained specialist with expertise in the maintenance and servicing of leak detection
devices, or under the responsibility of a trained and qualified individual in accordance with the applicable
regulations.
8In Germany: e.g. EN 1127, regulations of the EVUs
9In Germany: legal regulations of the Länder also need to be satisfied (e.g. VAwS).
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(4) Check the test valve at the end of the interstitial space away from the leak detector for
tightness and check that it is free of dirt – clean as required.
(5) Test for free passage of air through the interstitial space (section 6.4.2)
(6) Test the switching values with a testing device (section 6.4.3). Alternatively: test the
switching values without a testing device (section 6.4.3)
(7) Check the overpressure valve (section 6.4.5)
(8) Tightness test (section 6.4.6)
(9) Set up the equipment ready for operation (section 6.4.7)
(10) Completion of a test report by the qualified person, with confirmation of functional and
operational safety and reliability.
(11) Before starting work, we recommend performing the leak test of the system (which is
integrated in the leak detector) as described in section 3.5.2, in order to gain an impression
of the condition of the system.
6.4.2 Test for free passage of air through the interstitial space (see P-078 000)
(1) If several interstitial spaces are connected then each interstitial space should be tested
individually for free passage.
(2) If several interstitial spaces are connected via a mainfold with a shut-off device then all of
the shut-off valves of the manifold should be closed.
(The pressure and measuring lines are combined underneath the leak detector).
(3) Connect a gauge to the three-way cock 21 and set it to position “III”.
(4) Open the shutoff device in the manifold of the interstitial space which is to be tested, then
open the test valve at the end away from the leak detector.
IMPORTANT NOTE: Maintenance work and functional tests must only be performed by
qualified persons.
(5) Observe any pressure loss on the measuring instrument. If no pressure loss takes place,
locate and rectify the cause.
(6) Close the test valve of the pipe and then close the shut-off valve opened in step (4).
(7) Repeat steps (4) to (7) for every other pipe.
(8) Set the three-way cock 21 to position "I" and disconnect the gauge.
(9) Open all shut-off valves on the manifold with the pipe connected.
6.4.3 Test the switching values with a testing device (see P-115 395)
(1) Connect a testing device to the free connection port on the three-way cocks 20 and 21
(insert hose clips). Set both cocks to position "II".
(2) Connect the gauge to the test device.
(3) Close the needle valve (testing device) – pressure is then built up on top of the operating
pressure.
(4) Vent via the needle valve, determine the switching values for "Pump ON" and "Alarm ON"
(visual and audible), write the values down.
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(5) Close the needle valve and determine the switching values for "Alarm OFF" and "Pump
OFF", write the values down. (If necessary open the needle valve slightly so that there is a
slow pressure increase.)
(6) Set the three-way cocks 20 and 21 to position “I”. Disconnect the testing device.
6.4.4 Test the switching values without a testing device (see P-078 000)
(1) If several pipes are connected via a manifold, close all of the shut-off valves on the
manifold apart from the cock for the pipe with the smallest interstitial space volume.
(2) Connect a gauge to the three-way cock 21 and set it to position “III”.
(3) Vent via the three-way cock 20 (position “III”), determine the switching values for "Pump
ON" and "Alarm ON" (with visual and acoustic alarms), write the values down.
(4) Set the three-way cock 20 to position “I” and determine the switching values for "Alarm
OFF" and "Pump OFF", write the values down.
(5) Set the three-way cock 21 to position "I" and disconnect the gauge.
(6) Open all shut-off valves on the manifold with the pipe connected.
6.4.5 Check the overpressure valve (see P-078 000)
Operating pressure needs to be built up in the leak detection system before this test can be
performed.
(1) Three-way cock 21 to position “II” (pressure sensor is vented). The pump switches on and
an alarm is triggered.
(2) Press the “Audible alarm” button to silence the sound.
(3) Connect a gauge to the three-way cock 20 and set it to position “II”.
(4) Determine the opening pressure of the overpressure valve (no further pressure increase)
and make a note of the value. If the opening pressure of the overpressure valve exceeds
the test pressure of the interstitial space, replace or readjust it.
(5) Set the three-way cock 21 to position “I”. The pump will switch off. Determine the closing
pressure of the overpressure valve (no further drop in pressure – if the pump switches on
first then the cause should be located and rectified), make a note of the value.
(6) Set the three-way cock 20 to position "I" and disconnect the gauge.
6.4.6 Tightness test (see P-078 000)
(1) Check that all shut-off valves with connected interstitial space are opened.
(2) Connect a gauge to the three-way cock 21 and set it to position “III”.
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(3) Start with the tightness test once the pressure has been equalised. The test is passed if the
values in the table below are met. A greater drop in pressure means more stress on
wearing parts.
Interstitial space volume (litres) Max. pressure drop of 1 mbar (0.015 psi) after
250 22 minutes
500 45 minutes
1000 1.50 hours
1500 2.25 hours
2000 3.00 hours
2500 3.75 hours
3000 4.50 hours
3500 5.25 hours
4000 6.00 hours
(4) Set the three-way cock 21 to position "I" and disconnect the gauge.
6.4.7 Set up the equipment ready for operation
(1) Seal the housing.
(2) The shut-off valves for all connected pipes must be set to their open position.
6.5. Alarm / fault
(1) The red signal lamp comes on and an audible signal sounds.
(2) Press the “Audible alarm” button to silence the audible signal.
(3) Contact the installation company immediately.
(4) Determine and rectify the cause for the alarm, then perform a functional test of the leak
detection system as described in section 6.4.
7. Disassembly
The following points are particularly important for the disassembly of plants and systems which
could represent explosive hazards.
•Applicable regulations for the disassembly of electrical systems must be followed.
•Check that no gas (potentially explosive atmosphere) is present before and during the work.
•Seal any openings gas-tight that could otherwise allow the spread of an explosive
atmosphere.
•Do not use electrical equipment capable of generating sparks (saw, cutting grinder...) for
disassembly. If this is unavoidable, follow the instructions in EN 1127.
•Use low-sparking tools.
•Avoid any build-up of electrostatic charge (e.g. due to friction).
•Contaminated components (potential outgassing) should be disposed of appropriately.
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8. Marking
•Electrical data
•Serial no.
•Type designation
•Date of manufacture (month / year)
•Manufacturer’s code
•Legally required symbols/marks
•The connecting line(s) can be connected to areas for which category 3 devices (Group II
(G)) are required (T1 to T3; IIA to IIB).
9. Abbreviations
01 Signal lamp – "Alarm" – red
02 Shut-off valve
09 Signal lamp - "Operation" - green
17 Overpressure pump
20 Three-way cock in the high-pressure line
21 Three-way cock in the measurement line
24.1 Fuse
22 Venting device
30 Housing
52 Gauge
57 Test valve
59 Relay
69 Buzzer
70 Overpressure valve
71 “Audible alarm” button
72 Dry filter
74 Connecting line
76 Main circuit board
84 Test container, 1-litre
85 Test connection port (gauge)
88 Double walled pipe / double walled fitting or combination of the two
99 Control shaft
102 Pressure sensor
105 Control unit
106 Contacts for serial data transfer
107 Pulsation damper
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II
IIII
IIIIII
IVIV
21
21
21
21
20
20
20
20
21-09-2005 P - 078 000
Druckleitung Messleitung
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Ex
17102
72
22-09-2005 M1 - 078 000
76
30
212070
Ex
Ex
02
74
57
88
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57
88
99 99 57
88
88
02
22-09-2005 M2 - 078 000
Ex
Ex
Ex
230 V / 50 Hz 2120 72
71
69
01
09
19/38

88
88
22-09-2005 M3 - 078 000
Ex
Ex
Ex
230 V / 50 Hz 2120 72
71
69
01
09
20/38