Overpressure leak detector
DL and DLG
Z – 65.23 - 409
Art. No.: 603 002
Documentation DL
SICHERUNGSGERÄTEBAU GMBH
Hofstraße 10
57076 Siegen
Issue: 07/2006
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OVERPRESSURE LEAK DETECTOR DL..
Content
1 Overview of the various designs 1 page
2 Technical description for the overpressure leak detector DL 15 pages
3 Drawings to the technical description 8 pages
4 Appendix to the technical description 6 pages
3.1 Appendix B: Switch and pressure values 2 page
3.2 Appendix TD: Technical Data 1 page
3.3 Appendix FC: Dry Filter monitoring 1 page
3.4 Appendix TF: Dry filter – Size of dry filters 1 page
3.5 Appendix DP: Evaluating the display for the function "Tightness test" 1 page
5 Dimension and Drilling, Plastic-housing 1 page
6 Dimension and Drilling, Steel-housing, weather protected 1 page
7 Working sheet AB-820 500 pneumatic connections 2 pages
8 Approval Certificate of the TÜV-Nord 5 pages
9 Approval of the DIBT 5 pages
10 Declaration of conformity 1 page
22/08/2006
- 1 -
Overview of the various designs for
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GI 1
Overview of the various designs
The different designs of overpressure leak detectors in the DL series are described more
precisely by means of the attached letters.
DL …. ELC (P) FC M
The leak detector’s ‘manometer’ design is
equipped with a digital pressure reading in
the housing’s lid.
The leak detector’s ‘filter control’ design is
equipped with a monitoring device for the dry
filter, which emits a separate status signal
when the dry material has been consumed.
It is only available for alarm pressures of up to
450 mbars.
The leak detector’s ‘protected’ design is located
in a weatherproof housing.
Leak detectors for alarm pressures of 590 mbars
and higher are only available in this design.
The leak detector’s 'economic leak control’ design
functions as both a leak detector and a leak reading
device: whereby the leak detector is equipped with
an integrated distribution for connecting up to 6
tanks.
This design is always weatherproof and the ’P’ is
therefore inapplicable.
‘Numerical values’ for the leak detector’s alarm
pressure.
The alarm pressures range from 50 mbars to 3,000
mbars.
The leak detector’s ‘pressure leak detector’ design works
at overpressure in relation to the atmospheric pressure.
01/09/2005. Your partner for leak detector equipment Sicherungsgerätebau GmbH, Siegen
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Contents Page
1 Subject
2 Field of application
2.1 Requirements for interstitial space 2
2.2 Tanks / interstitial space 2
2.3 Stored products 2
2.4 Exclusion 3
3 Description of functions 3
3.1 Switching and pressure values 3
3.2 Normal operation 3
3.3 Air or liquid leak 4
3.4 Air drying / Dry filter (DL.. ONLY) 4
3.5 Overpressure valve 4
3.6 Description of the display and control elements 4
4 Installation instructions 6
4.1 General 6
4.2 Personal protective equipment 7
4.3 Installation of the leak detector 7
4.4 Installation of the connection lines 7
4.5 Installation of the dry filter (DL.. ONLY) 8
4.6 Choice of pressure reducer (DLG.. ONLY) 8
4.7 Pressure cylinder and pressure reducer (DLG.. ONLY) 8
4.8 Electrical connection 9
4.9 Installation examples 9
5 Start up/servicing 9
6 Operating instructions 10
6.1 General 10
6.2 Maintenance 11
6.3 Intended use 11
6.4 Function test 11
6.5 Alarms 14
7 Removal 14
8 Marking 15
9 Abbreviations 15
DRAWINGS
Setting three-way valves P – 060 000
Installation example DL .. M1 + M2 – 060 000
Installation example DLG .. M3 + M4 – 065 000
Wiring diagram DL .. SL - 853 600
Wiring diagram DLG .. SL – 853 700
Test device P - 115 392
ANNEX:
B Switching and pressure values B – 1
TD Technical data TD – 1
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1 Subject
Overpressure leak detector for double-walled tanks with pressure provided either by a pump or
by a compressed gas supply.
DL .. Overpressure leak detector with integrated pump. Dots stand for alarm pressure.
DLG .. Overpressure leak detector with compressed gas supply. Dots stand for alarm pressure
2 Field of application
2.1 Requirements for interstitial space
• Evidence of the pressure resistance of the interstitial space (see Annex B, column "p
TEST
"
minimum test pressure of the interstitial space)
• Evidence of the suitability of the interstitial space (for Germany: Building Inspectorate
Suitability Serification)
• Tightness of the interstitial space (see chap. 6.4.4)
• The number of interstitial spaces for monitoring in underground tanks depends on the total
interstitial space volume. According to prEN 13160, 8 m
3
must not be exceeded. It is
recommended not to exceed 4 m³ with regard to the feasibility of monitoring the tightness of
the interstitial space.
2.2 Tanks/interstitial space (see chapter 2.4)
• Under- and above ground double-walled steel or plastic tanks, without leak detection liquid
in the interstitial space, manufactured in the factory or on site, whose interstitial space is
suitable for the connection of a DL .. as per Annex B.
• Under- and above ground single-walled steel or plastic tanks with pressure-resistant leak
detection lining or leak detection jacketing, whose interstitial space is suitable for the
connection of a DL .. as per Annex B.
• Double-walled sumps or containments with interstitial space suitable for the connection of a
DL .. as per Annex B.
2.3 Stored products
Liquids hazardous to water with regard to the following points:
• The leak detection medium must not react with the stored products.
• Vapour/air mixtures resulting from the
- stored liquid
- stored liquid in combination with air / humidity or condensation
- stored liquid in combination with parts (materials) in contact with the liquid
must be classified in gas group IIA and II B and in temperature code T1 to T3.
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2.4 Exclusion
If permeation occurs in the interstitial space as a result of the stored product and the material
structure of the inner tank wall (e.g. in double-walled GRP tanks) which can result in an
explosive atmosphere in the interstitial space under normal operating condition, ONLY leak
detector DLG .. must be used in combination with an inert leak detection medium (pressure
cylinder or operational network).
3 Description of functions
The overpressure leak detector DL .. resp. DLG .. monitors both walls of a tank for leaks. The
monitoring pressure is high so that any leaks above or below the liquid level (stored product and
ground water) are detected as a fall in pressure.
Pressure is built in up in:
DL .. by sucking in the outside air through the
integrated pump via a dry filter and forwarding it
to the interstitial space.
The dry filter dries the air to approx. 10%
humidity. Drying is necessary to prevent
moisture/condensation from collecting in the
interstitial space. Spent dry filter fillings must
be regenerated or replaced.
DLG .. by conveying compressed gas (dried air or
intert gas) to the interstitial space. The leak
detector has a display in the housing lid which
shows the operating pressure in the interstitial
space.
• Values under 50 mbar or under 0.73 PSI are
not shown.
• Values between 50 and 999 mbar are shown
in mbar without decimals.
• Values from 1 bar are shown in bar with 2
decimal places and from 10 bar with 1 decimal
place.
• Values in PSI are shown with 1 or 2 decimal
places.
3.1 Switching and pressure values
Annex B contains a list of the switching values.
3.2 Normal operation
The overpressure leak detector is connected by pressure and measuring line with the interstitial
space(s). The overpressure created by the pressure generator (pump or pressure cylinder) is
measured and controlled by a pressure sensor.
On reaching the operating pressure (refill OFF), the pressure generator (pump or solenoid
valve) is switched off. The pressure slowly falls again due to unavoidable leaks in the leak
detection system. On reaching the switching value for "refill ON", the pressure generator is
switched on again and operating pressure restored.
In normal operation, the leak detector swings between these two pressure values with short
operational times and longer standstill periods, depending on the level of tightness and
temperature fluctuations in the system.
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3.3 Air or liquid leak
If a leak occurs below or above the liquid level or ground water, leak detection medium escapes
from the interstitial space. Pressure falls until the pressure generator is switched on to restore
the operating pressure. If the volume flow escaping out of the leak is greater than the refill
intake from the pressure generator, then the pressure in the system falls although the pressure
generator is activated.
Enlargement of the leak causes a further loss in pressure until the alarm pressure is reached.
The visual and audible alarm is triggered.
3.4 Air drying / dry filter (DL . ONLY)
The air fed to the interstitial space passes through a dry filter in the suction line. The dry filter
dries the air to approx. 10% humidity to prevent corrosion and accumulation of condensation
1
the interstitial space.
The dry filter is rated for twelve months as long as the system is used for its intended use and
there are no additional fluctuations in temperature.
A dry filter is orange when new and turns colourless (or green) when spent. Spent dry filters
must be replaced or regenerated without delay.
3.5 Overpressure valve
The overpressure valve integrated in the pressure line protects the interstitial space from
intolerably high overpressure (exceeding the test pressure).
Intolerably high overpressure can be caused among others by:
• increase in ambient temperature (e.g. direct sunshine)
• increase in temperature from hot filling (possibly consult manufacturer)
3.6 Description of the display and control elements
3.6.1 Status of the display elements (LEDs) for type DL ..
LEDs Operating status Alarm status Alarm, audible alarm
Unit out of order
switched off
in
OPERATION:
ON ON ON ON
green
ALARM: red
OFF ON FLASHES ON
1
Accumulation of condensation in the interstitial space can cause an intolerable pressure increase.
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3.6.2 Status of the display elements (LEDs) for type DLG ..
LEDs Operating
status
OPERATION:
ON ON ON ON ON ON
Refilling
activated
Filling
activated
Alarm
status
Alarm, audible
alarm switched off
Unit out
of order
green
ALARM: red
PRESSURE
FEED: yellow
OFF OFF
OFF ON FLASHES ON ON OFF
OFF
FLASHES
2
ON
ON FLASHES ON
3.6.3 Operating functions through keys
For DL .. and DLG ..
Switch audible alarm off:
Press the button "Audible alarm" once briefly, audible signal switches off, red LED flashes.
Press again to switch the audible signal on.
This function is not available in normal operation and during malfunctions.
Testing the visual and audible alarm
Press and hold the button "Audible alarm" (approx. 10 sec.), the alarm is triggered until the button
is released.
This is only possible if pressure in the system has exceeded the "Alarm OFF" pressure.
2
on or off depending on pressure and/or audible alarm
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DL .. DLG ..
Zero point adjustment3:
Three-way valve 21 in setting II (alarm triggered,
pump running)
Press and hold the button "Audible alarm" until
the "Alarm" LED flashes quickly (approx. 5 sec.),
release button, then press again and release.
Zero point adjustment is confirmed by 3 visual
and audible signals.
Three-way valve 21 in setting I
The zero point adjustment can only be repeated
after operating pressure has been built up.
Checking the tightness of the monitored system
Press and hold the button "Audible alarm" until
the "Alarm" LED flashes quickly, then release. A
value for tightness is shown when the "Alarm"
LED lights up (see chapter 6.4.5)
For this check, the leak detector must have
completed at least 1 automatic refilling interval in
normal operation (i.e. without filling with an
installation pump) for a meaningful statement.
Filling the interstitial space with leak detection
medium
Press and hold the "Filling" button for approx. 5
sec. until the yellow LED flashes. Filling is
activated.
On reaching the operating pressure, the yellow
LED goes off and filling stops.
When pressure falls because of pressure
compensation processes, filling can be activated
again to ensure that the interstitial space is filled
completely.
If you hold the button for longer than 10 sec., this
triggers the alarm. It goes off again just after you
release the button.
Checking the tightness of the monitored system.
Press and hold the button "Audible alarm" until
the "Alarm" LED flashes quickly, then release. A
value for tightness is shown when the "Alarm"
LED lights up and is also shown in the display
(see chapter 6.4.5)
10 sec. after the value is displayed, the leak
detector goes back to normal operation.
For this check, the leak detector must have
completed at least 1 automatic refilling interval in
normal operation (i.e. without activating the filling
function) for a meaningful statement.
4 Installation instructions
4.1 General
(1) Installation only by qualified companies
(2) Comply with pertinent accident prevention regulations.
(3) Comply with the ex regulations (if necessary) such as BetrSichV [Operational Safety
Ordinance] or others.
(4) Before inspecting control shafts, check the oxygen level and scavenge the control shaft if
necessary.
DLG ONLY
(5) When transporting the pressure cylinder to and from the site, always comply with the
corresponding traffic regulations.
(6) Secure the pressure cylinder on site to prevent it from falling over.
3
Only applicable for DL 50 to DL 450.
4
For Germany: qualified companies as per § 19l WHG [Water Resources Act] with skills and know-how
when it comes to fire and explosion protection.
4
.
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(7) If start up/operation takes place in enclosed rooms, ensure that there is adequate
ventilation. Affix a warning sign.
4.2 Personal Protective Equipment
The items listed here refer in particular to safety when working on systems which may be
subject to risk of explosion.
When working in potentially explosive areas, at least the following items of equipment are
required:
• Suitable clothing (risk of electrostatic charge)
• Suitable tools (as per EN 1127)
• Suitable gas detectors for the prevailing vapour/air mixtures (work should only be carried out
at concentrations 50% below the lower flammable limit
5
)
• Instruments for measuring the oxygen level in the air (Ex / O-meter)
4.3 Installing the leak detector
(1) Mounted to the wall usually with plugs and screws.
(2) In a dry room, or in the open air in a suitable protective box.
(3) Installation in protective box: additional external signal or alarm forwarding via dry relais
contacts to central control desk or similar device.
(4) NOT in potentially explosive areas.
(5) The distance between leak detector and interstitial space should be kept as short as
possible.
4.4 Installation of connection lines (between leak detector and tank)
(1) Metal (usually copper) or plastic tubes with pressure resistance at least equal to the test
pressure of the interstitial space, the same applies to fittings and screwed unions. (Note
temperature range, particularly when using plastic).
(2) Inside clearance min. 4 mm for inert gas as leak detection medium
min. 6 mm for air as leak detection medium
(3) Should not be much longer than 50 m. If longer than 50 m, use tube/hose with larger inside
clearance using corresponding adapters.
(4) Colour coding: Measuring line: red
Pressure line: white (or clear)
(5) The full cross section must be maintained. No squeezing or bending
6
.
(6) Metal or plastic tubes underground or plastic tubes installed outside above ground must be
routed in conduits.
5
Other percentages are possible based on national or company regulations.
6
If necessary, use commercially available moulded pieces (with stipulated bending radii) for plastic tubes.
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(7) Seal conduits to be gas-tight with protection from penetration of liquids.
(8) Avoid build-up of static electricity (e.g. when inserting and routing tubes).
(9) Details for connecting systems, see worksheet AB-820 500
4.5 Installation of the dry filter (DL .. ONLY)
(1) As close as possible to the leak detector. If the leak detector is mounted in a protective
box, the dry filter can be installed in the protective box or in the open air.
(2) Vertical with intake opening at the bottom, using enclosed installation material.
(3) Connect the dry filter to the leak detector intake port with a PVC hose (or similar).
4.6 Choice of pressure reducer (DLG ..ONLY)
(1) The pressure reducer must have an integrated overpressure valve.
(2) The range for the pressure reducer must be selected according to the specific application
respectively adjusted pressure (see Annex B).
4.7 Pressure cylinder and pressure reducer (star up/function test) (DLG .. ONLY)
(1) After the pressure cylinder has been set up securely, remove the protective cover.
(2) Fit the pressure reducer to the cylinder.
(3) Close the shut-off cock on the pressure reducer.
(4) Install the connecting tube between leak detector and pressure reducer.
(5) Turn pressure control valve all the way back.
(6) Open bottle shut-off cock (poss. leak test between pressure reducer and bottle)
(7) Adjust pressure at pressure reducer as per Annex B using pressure control valve on
pressure reducer (poss. readjust during pressure build-up).
(8) To change the pressure cylinder:
- Close the shut-off cock on the pressure reducer.
- Close the bottle shut-off cock.
- Remove the pressure reducer from the cylinder (caution: gas escapes until pressure is
relieved in the pressure reducer)
- Put protection cover on the cylinder.
- Erect and secure new cylinder, remove protection cover.
- Fit the pressure reducer (poss. leak test between pressure reducer and cylinder)
- Open bottle shut-off cock.
- Open shut-off cock on pressure reducer, poss. readjust pressure using the pressure
control valve.
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4.8 Electric connection
(1) Power supply: according to label
(2) Permanent installation, i.e. no plugged or switched connections.
(3) Comply with the regulations issued by the utility company.7
DL .. DLG ..
(4) Terminal configuration: (see also SL-853
600)
1 / 2 Mains connection
3 / 4 Occupied (internal pump)
5 / 6 External signal (in an alarm, a line
voltage present here, stopped
by pressing button "Audible
alarm").
11 / 12 Dry relay contacts (opened on
alarm and power failure).
(4) Terminal configuration: (see also SL-853
700)
1 / 2 Mains connection
3 / 4 Occupied (internal solenoid)
5 / 6 External signal (in an alarm, a line
voltage here, stopped by pressing
button "Audible alarm".
11 / 12 Dry relay contacts (open
on alarm and power failure)
21 / 22 Occupied (internal sensor)
4.9 Installation examples
Installation examples are shown in the Annex
5 Start up/servicing
(1) Observe also the instructions in chapter 4.
(2) Special safety measures are required when commissioning a leak detector in an already
filled tank (e.g. check that there is no gas in leak detector and/or interstitial space). Other
measures can depend on local conditions at the discretion of the staff.
(3) After completing the pneumatic connection, proceed with the electrical connection.
(4) Check that the LEDs "Operation" and "Alarm" light up and that the audible alarm works.
Press the button "Audible alarm".
(5) Three-way valve 21 in position "III", connect test instrument.
DL ..
(6) Apply operating pressure to leak detection
system as per table on page 3 (use
installation pump with adequately
dimensioned dry filter or nitrogen pressure
cylinder).
(7) Pressure can be built up with the installation
pump directly using the pressure line or via
the three-way valve 20 (position IV).
Note: If pressure cannot be built up with the
7
For Germany: also VDE regulations
DLG ..
(6) Press and hold "Fill" button for approx. 5
secs. until yellow LED flashes. The solenoid
valve opens to fill the interstitial space
quickly. On reaching the operating
pressure, filling stops and the yellow LED
goes off.
For very large interstitial spaces, it may be
necessary to change the cylinder (see
chapter 4.6).
Note: If pressure cannot be built up in spite of
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connected installation pump, find and
eliminate the leak (poss. check capacity of
installation pump, check correct setting of
pressure reducer).
the connected pressure cylinder, find and
eliminate the leak (poss. check correct setting of
pressure reducer). CAUTION: Leak detector
display begins at 150 mbar pressure.
(7) Filling can (should) be activated again to
ensure that the interstitial space is filled
completely.
(8) On reaching the leak detector operating pressure (pressure generator in leak detector
switches off), install pressure tube again or set both valves to setting "I". Remove pressure
instrument.
(9) Check functions as per chapter 6.4
6 Operating instructions
6.1 General
(1) Following impervious, correct connection of the leak detection system, the leak detector
can be presumed to work in the normal range.
(2) If the pressure generator switches on frequently or runs continuously, this indicates leaks
which must be eliminated in an appropriate period of time.
(3) An alarm always indicates a major leak or defect. Find and eliminate the cause quickly.
(4) The operator must regularly check that the "Operation" LED is working properly.
(5) Disconnect the leak detector from the power supply before performing and repair work.
(6) The operating lamp goes off when there is a circuit failure: the dry relay contacts open.
(7) (DL .. ONLY). When the filter filling changes colour from orange to colourless (or green),
it must be replaced or regenerated.
6.2 Maintenance
6.2.1 By the operator:
(1) Check the dry filter regularly
8
. When it changes colour from orange to colourless (or green),
replace or regenerate the filter filling.
(2) Check the filling in the pressure cylinder regularly. If the pressure is only just above the
pressure setting on the pressure reducer, refill or replace the cylinder.
6.2.2 Maintenance work and function check by qualified experts
8
Recommended: min. at 2 monthly intervals
9
For Germany: experts for installation/service of leak detectors or in the responsibility of an expert,
according to the currently valid regulations.
9
.
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(1) Once a year to ensure functional and operational safety.
(2) Scope of inspection as per chapter 6.4
(3) Also check compliance with the conditions in chapter 4.5 and 6.2.
6.3 Intended use
• Groups of interstitial space only for underground interstitial spaces.
• Double-walled tanks, sumps or containments whose walls on the stored product side are
resistant to permeation from particles which can generate potentially explosive vapours.
EXCEPTION:
Inner walls not resistant to permeation when using an inert leak detection medium.
• The alarm pressure must be min. 30 mbar higher than any pressure occurring in the
interstitial space (from inside and/or outside).
• Grounding (where applicable) according to valid regulations
10
.
• Leak detection system is impermeable, according to chapter 6.4.6 of this documentation.
• Mount the leak detector outside potentially explosive area.
• Lead-throughs for the pneumatic hoses are sealed gas tight.
• Leak detector (electric) is connected so that it cannot be switched off.
6.4 Function test
Check functional and operational safety
• every time after start up
11
• on the basis of chapter 6.2 in the intervals stated there
• every time after troubleshooting
6.4.1 Test scope
(1) Poss. check the scope of work with the person responsible on site.
(2) Comply with the safety regulations for handling the specific stored product.
(3) (DL .. ONLY) Regeneration/replacement of the filter filling.
(4) Check the free passage of air (gas) in the interstitial space (chapter 6.4.2).
(5) Check the switching values with the test unit (chapter 6.4.3),
alternatively: check the switching values without test unit (chapter 6.4.4)
(6) Check the overpressure valve (chapter 6.4.5).
(7) Tightness test (chapter 6.4.6).
(8) Restore operating condition (chapter 6.4.7).
(9) Test report confirming functional and operational safety to be compiled by the qualified
person.
10
e.g. EN 1127
11
For Germany; otherwise comply with the national regulations (e.g. VAwS)
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6.4.2 Check the free passage of air (gas) in the interstitial space
(1) If several interstitial spaces are manifolded together, check the free passage of each
interstitial space on its own:
(2) If several interstitial spaces are connected to a manifold with shut-off cocks in the pressure
and measuring lines, close all shut-off devices at the distribution units.
(3) Connect measuring gauge at three-way valve 21, setting "III".
(4) Three-way valve 20 in setting "IV". The (corresponding) interstitial space is vented.
CAUTION: maintenance work and function checks only by qualified persons. If inert gas is
used as leak detection medium, ensure there is adequate ventilation!
(5) Open shut-off cocks of the first (following) tank (measuring and pressure lines in pairs).
(6) Ascertain the pressure loss on the measuring gauge. If there is no pressure loss, find and
remedy the cause.
(7) Close the shut-off cocks opened under paragraph (4).
(8) Proceed with steps (5) to (7) with every other tank.
(9) Three-way valve 20 and 21 in setting "I", remove measuring gauge.
(10) Open all shut-off cocks on the manifold with connected tanks.
6.4.3 Checking the switching values with test unit.
(1) Connect the test unit to the test port of three-way valve 20 and 21. Both valves in setting
"II"“.
(2) Connect measuring gauge to the test unit.
(3) Close needle valve (test unit), pressure is built up to operating pressure.
(4) Vent using the needle valve, ascertain switching values for "Pump ON" and "Alarm ON"
(visual and audible), note values.
(5) Close needle valve and ascertain switching values for "Alarm OFF" and "Pump OFF". Note
values (possibly open needle valve slightly for slow increase in pressure)
(6) Three-way valve 20 and 21 in setting "I", remove measuring gauge.
6.4.4 Checking the switching values without test unit
(1) If several tanks are connected by a manifold, close all the shut-off cocks on the manifold
apart form the valves for the tank with the smallest interstitial space.
(2) Connect measuring gauge to three-way valve 21, setting "III".
(3) Vent via three-way valve 20 (setting "III"), ascertain switching values for "Pump ON" and
"Alarm ON" (with visual and audible alarm), note values.
(4) Three-way valve 20 in setting "I", ascertain switching values for "Alarm OFF" and "Pump
OFF", note values
(5) Three-way valve 21 in setting "I", remove measuring gauge.
(6) Open all shut-off cocks on the manifold with connected tanks.
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6.4.5 Checking the overpressure valve
Operating pressure must have been built up in the leak detector for this test.
(1) Three-way valve 21 in setting "II" (pressure sensor is vented). The pump switches on and
the alarm is triggered.
(2) Connect measuring gauge to three-way valve 20, setting "II".
(3) Ascertain opening pressure of the overpressure valve (no further increase in pressure) and
note value. If the opening pressure of the overpressure valve exceeds the test pressure of
the tank, replace or adjust the valve.
(4) Three-way valve 21 in setting "I". The pump switches off, ascertain the closing pressure of
the overpressure valve (no further fall in pressure
12
), note the values.
(5) Three-way valve in setting "I", remove measuring gauge.
6.4.6 Tightness test
(1) Check that all shut-off cocks with connected tank are open.
(2) Connect measuring gauge to three-way valve 21, setting "III".
(3) Begin with the leak test after pressure has compensated. The tightness test is passed
when the values in the following table are achieved.
Interstitial space volume in litres Max. 1 mbar (0.015 psi) pressure loss in
250
500
1000
1500
2000
2500
3000
3500
4000
22 minutes
45 minutes
1.50 hours
2.25 hours
3.00 hours
3.75 hours
4.50 hours
5.25 hours
6.00 hours
(4) Three-way valve 21 in setting "I", remove measuring gauge.
6.4.7 Restore the operating condition
(1) Seal the housing
(2) The shut-off cocks for every connected tank must be in the "open" setting.
12
If the pump switches on before the closing pressure is reached, find out why and eliminate the cause.
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6.5 Alarms
OVERPRESSURE – LEAK DETECTOR DL ..
DL ..
(1) Red LED lights up, the audible signal can
be heard.
(2) Stop the audible signal.
DLG ..
(1) Red and yellow LEDs light up, the audible
signal can be heard.
(2) Stop the audible signal.
(3) Inform the installation company
(3) Inform the installation company
immediately.
(4) Find and eliminate the cause of the alarm,
then check the functions of the leak
detection system according to section 6.4.
immediately.
(4) Find and eliminate the cause of the alarm,
then check the functions of the leak
detection system according to section 6.4.
(5) In the event of a malfunction, only the red
LED lights up (yellow is off). Inform the
manufacturer.
7 Removal
For the removal of units, which can cause a risk of explosion, always comply with the following
points:
• Check that no gas is present before and during work.
• Any openings which could allow for entrainment of a potentially explosive atmosphere must
be sealed gas-tight.
• Do not use spark-producing electrical tools (saws, abrasive cutters). If this is unavoidable,
comply with EN 1127.
• Avoid the build-up of electrostatic charges (e.g. through friction or wearing unsuitable
clothing).
• Dispose of contaminated parts appropriately (risk of outgassing).
8 Marking
• Electrical data
• Serial number
• Type designation
• Manufacturing date (month / year)
• Manufacturer's symbol
• Statutory symbols
• Pressure and shut-off cock line for leak detection medium air can be connected to zone 2
interstitial space; there are no restrictions for nitrogen as leak detection medium.
9 Abbreviations
01 LED "Alarm", red
02 Shut-off cock
05 Shut-off cock (pressure regulator)
26/01/2006
44 Solenoid valve
45 LED "Refill", yellow"
59 Relay
14
18 von 49
OVERPRESSURE – LEAK DETECTOR DL ..
09 LED "Operation", green
13 Pressure line
14 Pressure reducer
17 Overpressure pump
19 Pressure cylinder
20 Three-way valve in pressure line
21 Three-way valve in measuring line
24.1 Fine-wire fuse
24.2 Fine-wire fuse
24.3 Fine-wire fuse
25 Pressure cylinder shut-off cock
29 Key "Fill"
30 Housing
43 Measuring line
61 Check valve with filter
69 Buzzer
70 Overpressure valve
71 Key "Audible alarm"
72 Dry filter
73 Interstitial space
76 Main PCB
77 Pressure control valve
102 Pressure sensor
103 Display
104 Operational pressure network (air / nitrogen)
105 Control unit
106 Contacts for serial data transfer
26/01/2006
15
II
19 von 49
20
20
21
IIII
21
20
20
IIIIII
21
IVIV
21
Druckleitung Messleitung
27-11-2002
P - 060 000
76
20 von 49
30
17102
Ex
72
ExEx
13
212070
43
73
27-11-2002
M1 - 060 000
09
21 von 49
01
71
69
230 V / 50 Hz
20
72
Ex
21
02
13
Ex
43
Ex
/
73 73 73
27-11-2002
M2 - 060 000
09
22 von 49
01
45
71
29
69
230 V / 50 Hz
20
13
21
43
103
104
14
Ex
02
Ex
73 73 73
Ex
/
27-11-2002
M3 - 065 000
76
23 von 49
25
0
0
2
0
0
1
0
0
3
r
a
b
0
1
0
0
b
a
r
1
6
14
30
70
102
05
44
19
77
2120
Ex
13
43
ExEx
73
27-11-2002
M4 - 065 000
Rp
24 von 49
~
17/60
102
24.1
26
AC
DC
09
453
69
59
11 121
105
106
27-11-2002
76
71 01
SL - 853 600
44
25 von 49
24.3
24.2
26511121
AC
DC
09
4
3
24.1
69
59
103
106
102
21
22
105
71 29 01 45 76
27-11-2002
SL - 853 700
98
26 von 49
20
90°90°
21
85
22
84
20
21
85
22
98
0
Kl. 1,0
52
17-12-2002
P - 115 392
OVERPRESSURE LEAK DETECTOR DL ..
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B Switching and pressure values
ANNEX B
Type
DL
pTS
[mbar]
p
AE
[mbar]
p
PA
[mbar]
50 20 > 50 < 100
100 70 > 100 < 150
290 260 > 290 < 350
330 300 > 330 < 410
400 370 > 400 < 500
450 420 > 450 < 510
590 560 > 590 < 700
750 720 > 750 < 850
1000 970 > 1000 < 1400
1100 1070 > 1100 < 1450
1500 1450 > 1500 < 1900
2000 1950 > 2000 < 2400
2300 2250 > 2300 < 2770
2500 2450 > 2500 < 2900
1
P
ÜDV1
[mbar]
p
PRÜF
[mbar]
170 ± 20 ≥ 200
220 ± 20 ≥ 250
420 ± 20 ≥ 450
465 ± 20 ≥ 500
565 ± 20 ≥ 600
565 ± 20 ≥ 600
750 ± 30 ≥ 850
940 ± 30 ≥ 1000
1550 ± 50 ≥ 1750
1580 ± 70 ≥ 1820
2100 ± 50 ≥ 2350
2650 ± 50 ≥ 2950
3100 ± 100 ≥ 3500
3200 ± 50 ≥ 3550
3000 2950 > 3000 < 3400
_
Special switching values agreed between SGB and customer
3750 ± 50 ≥ 4150
The following abbreviations are used in the table:
maximum pressure at the low point of the tank, including overlay pressure
P
TS
switch value "Alarm ON", the alarm is triggered at the latest at this pressure
p
AE
p
switch value "Alarm OFF", the alarm goes off on passing this value.
AA
The switching value "Alarm OFF" is approx. 15 mbar higher than the switch value
"Alarm ON" for pressure stages < 1000 and approx. 100 mbar higher for pressure stages
> 1000
(p
= pAE + ~15 mbar (pressure stages < 1000) ~ 100 mbar (pressure stages > 1000))
AA
p
Switch value "Pump OFF" (=nominal pressure)
PA
p
Switch value "Pump ON“
PE
The switch value "Refill ON" is approx. 15 mbar lower than the switch value "Refill OFF"
for pressure stages < 1000 and approx. 100 mbar lower for pressure stages > 1000
(p
= pPA - ~15 mbar (pressure stages < 1000) ~ 100 mbar (pressure stages > 1000))
PE
Opening pressure overpressure valve 1 (interstitial space side)
p
ÜDV1
p
Minimum test pressure of the interstitial space
PRÜF
1
The table states the opening pressure for the overpressure valve at which the volume flow of the pump is blown off.
The triggering pressure (first opening) is lower.
01/02/2006
- B-1 -
ANNEX B
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OVERPRESSURE LEAK DETECTOR DL ..
Type
DLG
pTS
[mbar]
p
AE
[mbar]
p
PA
[mbar]
50 20 > 50 < 100
100 70 > 100 < 150
290 260 > 290 < 350
330 300 > 330 < 410
400 370 > 400 < 500
450 420 > 450 < 510
590 560 > 590 < 700
750 720 > 750 < 850
1000 970 > 1000 < 1400
1100 1070 > 1100 < 1450
1500 1450 > 1500 < 1900
2000 1950 > 2000 < 2400
2300 2250 > 2300 < 2770
2500 2450 > 2500 < 2900
2
P
[mbar]
ÜDV1
p
3
ÜDV2
[mbar]
p
PRÜF
[mbar]
170 ± 20 600 ± 50 ≥ 200
220 ± 20 650 ± 50 ≥ 250
420 ± 20 850 ± 50 ≥ 450
465 ± 20 900 ± 50 ≥ 500
565 ± 20 1000 ± 50 ≥ 600
565 ± 20 1000 ± 50 ≥ 600
740 ± 30 1250 ± 100 ≥ 850
940 ± 30 1500 ± 100 ≥ 1000
1550 ± 50 2700 ± 100 ≥ 1750
1580 ± 70 2400 ± 100 ≥ 1820
2100 ± 50 3400 ± 100 ≥ 2350
2650 ± 50 4200 ± 100 ≥ 2950
3100 ± 100 4800 ± 200 ≥ 3500
3200 ± 50 5000 ± 100 ≥ 3550
p
DM
[mbar]
200
250
450
500
600
600
850
1000
1800
1850
2400
3000
3500
3600
3000 2950 > 3000 < 3400
_
Special switching values agreed between SGB and customer
3750 ± 50 6000 ± 100 ≥ 4150
The following abbreviations are used in the table:
maximum pressure at the low point of the tank, including overlay pressure
P
TS
switch value "Alarm ON", the alarm is triggered at the latest at this pressure
p
AE
p
switch value "Alarm OFF", the alarm goes off on passing this value.
AA
The switch value "Alarm OFF" is approx. 15 mbar higher than the switch value "Alarm
ON" for pressure stages < 1000 and approx. 100 mbar higher for pressure stages >
1000
(p
= pAE + ~15 mbar (pressure stages < 1000) ~ 100 mbar (pressure stages > 1000))
AA
Switch value "Pump OFF" (=nominal pressure)
p
PA
p
Switch value "Pump ON“
PE
The switch value "Refill ON" is approx. 15 mbar lower than the switch value "Refill OFF"
for pressure stages < 1000 and approx. 100 mbar lower for pressure stages > 1000
(p
= pPA - ~15 mbar (pressure stages < 1000) ~ 100 mbar (pressure stages > 1000))
PE
Opening pressure overpressure valve 1 (interstitial space side)
p
ÜDV1
p
Opening pressure overpressure valve 2 (supply side)
ÜDV2
p
Minimum test pressure of the interstitial space
PRÜF
p
Set pressure at the pressure reducer
DM
4200
2
The table states the opening pressure for the overpressure valve at which the volume flow of the pump is blown off.
The triggering pressure (first opening) is lower.
3
Overpressure valve 2 ÜDV2 can be omitted if the test pressure in the interstitial space is higher than the triggering
pressure of the overpressure valve integrated in the pressure reducer.
01/02/2006
- B-2 -
ANNEX TD
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OVERPRESSURE LEAK DETECTOR DL ..
Technical data
1. Electrical data
Power supply (without external signal) 230∼ V - 50 Hz - 50 W
Switch contact load, terminals AS (5 and 6) 230∼ V - 50 Hz - 200 VA
Switch contact load, potential-free contacts, max: 230∼ V - 50 Hz - 3 A
(Terminals 11 and 12) min: 6 V / 10 mA
External fuse of the leak detector max. 10 A
Overvoltage category 2
2. Pneumatic data (requirements for the test measuring gauge)
Nominal size mind. 100
Class accuracy mind. 1.6
Scale end value suitable
21/07/2005
- TD-1 -
ANNEX FC
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OVERPRESSURE LEAK DETECTOR DL..
Dry filter monitoring (FC)
1 Function
A sensor is integrated in the suction line of the pump between pump and dry filter to measure
the moisture of the air intake.
The sensor registers the increase in relative humidity when the desiccant is spent. The optical
and audible alarm is triggered together with the potential-free message when the drying capacity is insufficient.
The visual indication consists of alternate flashing of the two red alarm LEDs. The potential-free
indication is present at terminals 31 to 34:
31/32 Contact opens on receiving a message
31/34 Contact closes on receiving a message
2 Changing the drying material
When getting the indication "dry filter spent", the drying material should be replaced after an
appropriate period of time.
The audible signal can be acknowledged by pressing briefly once. The visual and potential-free
indication remains.
The entire indication can be acknowledged by pressing and holding the button "Acknowledge
dry filter message" (until the lower LED flashes). Next time the pump starts up (or if this function
is carried out while the pump is running, after approx. 30 s), the indication is triggered again if
the residual moisture is too high.
After replacing the drying material, quit the indication by pressing and holding the button as
described above.
3 Limits of use
The following limits of use must be observed for the dry filter monitoring function:
1. The pump must run min. 30. sec to obtain a meaningful statement.
During or after start up of the leak detector, the time between pump ON and OFF should be
measured to check whether this minimum operating time is achieved.
2. No meaningful measuring results are obtained at low temperatures (below -5°C) so that the
measurement is deactivated below -5°C.
21/07/2005
- 1 -
ANNEX TF
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OVERPRESSURE LEAK DETECTOR DL..
Dry filter
1 Size of dry filter for underground tanks:
TF 180 (the larger dry filters can also be used)
2 Size of dry filters for above ground tanks:
Max. volume of the interstitial space with
Type
DL 50
DL 100
DL 290
DL 330
DL 400
DL 450
DL 590
DL 750
DL 1000
DL 1100
DL 1500
DL 2000
DL 2300
DL 2500
DL 3000
TF 180 TF 1 TF 2 TF 6
350 750 2100 4800
300 600 1600 3700
250 520 1500 3500
240 500 1350 3000
210 400 1150 2600
150 300 800 1850
130 250 700 1600
110 230 600 1400
21/07/2005
- 1 -
ANNEX DP
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OVERPRESSURE LEAK DETECTOR DL..
Evaluating the display for the function "Tightness test"
Chapter 3.6.3 described "Checking the tightness of the monitored system". This function can be
used to obtain an indication of the tightness of the monitored system.
This is only possible if the switching value "Alarm OFF" has been exceeded. It can be repeated
several times in succession.
This check is advisable before carrying out a recurrent function test on a leak detector, to see
directly whether there is any need to look for leaks.
After pressing the button, this is confirmed by a brief audible signal which can be heard once,
followed by a flashing signal, i.e. the Alarm LED flashes briefly to indicate the tightness as follows:
Number or flashes Evaluation of the tightness
0 Very tight
1 bis 3 Tight
4 bis 6 Sufficient tight
7 bis 8 Maintenace recommended
9 bis 10 Maintenace highly recommended
The smaller the above value, the more tight is the system. The meaningfulness of this value
naturally also depends on temperature fluctuations and should therefore be considered to be an
indicative value.
22/08/2006
- 1 -
To remove th e cover
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~350
30 100217
To open the cover
B x H x T = 266 x 217 x 110
~250
170
230
6
266
18-11-2003
Dimension / Drilling
8
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200
260
300
T = 140
220
28-06-2005
Drilling / Dimension
Work Sheet: AB-820 500
35 von 49
Pneumatic connections
1 Flare type fitting for flare type pipes
1. Lubricate the O-rings
2. Place the intermediate ring loosely in the threaded connection piece
3. Push the union nut and the thrust collar over the pipe
4. Tighten the union nut manually
5. Tighten the union nut until clearly increased force is needed
6. Finished assembly: turn by a further ¼ of a revolution
2 Clamping ring threaded fitting for plastic and metal pipes
1. Insert the support sleeve into the end of the pipe
2. Insert the pipe with support sleeve as far as it will
go
3. Tighten the thread until strong resistance can be
clearly felt
4. Lightly loosen the nut
5. Tighten the nut until resistance can be felt (nut
must exactly match the thread of the basic body)
3 Olive threaded fitting for plastic and metal pipes
1. Insert the reinforcing sleeve into the end of
the pipe
2. Knock in the reinforcing sleeve
3. Push the union nut and the olive over the
end of the pipe
4. Screw the union nut by hand until you feel
a stop
5. Press the pipe against the stop in the inner
cone
6. Tighten the union nut by approx. 1.5 revolutions (pipe must not turn)
7. Loosen the union nut: check whether the pipe visibly projects from under
the cutting ring (it doesn’t matter if the clamping ring can be turned)
8. Retighten the union nut using normal force
4 Quick-action fitting for PA- and PUR-tubes
1. Make a right-angled cut in the PA pipe
2. Loosen the union nut and push it over the end of the pipe
3. Push the pipe onto the nipple up to where the thread begins
4. Tighten the union nut by hand
5. Further tighten the union nut using a wrench until clearly increased force
is needed (approx. 1 to 2 revolutions)
NOT suitable for PE-pipes
AB-820500.DOC
24. Jul. 03 Revision: 1.0 Page: 1
Work Sheet: AB-820 500
36 von 49
Pneumatic connections
5 Tube connections (socket 4 and 6 mm for EXCESS PRESSURE)
1. Push wire or screw clip over the tube
2. Push the tube onto the Cu pipe or the tube socket (if necessary heat or dampen PVC tube),
tube must fit tightly all the way round
3. Wire clip: clamp tightly using pliers and push onto the joint
Screw clip: push the clip over the joint and tighten it using a screwdriver,
care must be taken that the clip is a smooth tight fit.
6 Tube connections (socket 4 and 6 mm for VACUUM)
For vacuum applications where there is no excess pressure on the connection lines even in the
case of a leakage proceed as in item 5, but without clips.
For vacuum applications where excess pressure could arise in the case of a leakage, proceed as
in Item 5.
AB-820500.DOC
24. Jul. 03 Revision: 1.0 Page: 2
TÜV Nord / Systems
37 von 49
1 July 2005
2102Stb
File: 3237DV01040
Order No.: 8100586804
A p p r o v a l C e r t i f i c a t e
for the design of a leak detector
as part of a leak detection system
================================================================
1 Subject
Overpressure leak detector as part of a leak detection system function on the
basis of overpressure
2 Commissioned by
Sicherungsgerätebau GmbH
Hofstraße 10
57076 Siegen
3 Details about the leak detector
3.1 Manufacturer
See commissioned by
3.2 Type
DL .. / DLG ..
3.3 Application
Double walled tanks, single walled tanks with pressure-resistant jacketing and
double walled sumps and containments with sufficient pressure resistance
(see section No. 2 of the Technical Description dated 21 April 2004)
3.4 Design
The designation "overpressure leak detector type DL.. / DLG.." covers two
types which differ according to how pressure is generated and with regard to
the switching pressures. The units consist essentially of a pressure transducer
and a display/message unit, with electronic control and signal processing. Air
or inert gas can be used as leak detection medium, complying with the
maximum pressures on the bank bottom stated in Annex B of the Technical
Description.
The following unit variants are used:
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Overpressure leak detector DLG ..
The leak detector can be operated with air as well as with inert gas as leak
detection medium. The necessary operating pressure in the interstitial space is
generated by pressure-controlled refilling from a stationary pressure
accumulator connected to the interstitial space. If the operating pressure in the
interstitial space falls below the adjusted alarm value, then the visual and
audible alarm is triggered automatically.
Overpressure leak detector DL ..
In this version, pressure is generated in the interstitial space by an integrated
pump, using only dried ambient air as leak detection medium.
All unit variants are equipped with a test coupling for connecting an external
measuring gauge.
Overpressure valves to protect the interstitial space from excessive
overpressure are an integral part of the leak detectors and installed in the
pressure lines of the unit. Overpressure valves to protect the type DLG .. units
when connected to an external pressure accumulator must be connected
externally between the leak detector and pressure accumulator, as required.
Details of the design for leak detector DL.. / DLG .. are contained in the
Technical Description issued by Sicherungsgerätebau GmbH dated 21 April
2004.
4. Test principles
Approval principles for leak detection systems for double walled pipes (ZGLAGR)
EN 13160 Part 1 and 2
5. Test documents/Test samples
5.1 Technical Description of the overpressure leak detector DL.. dated 21 April
2004
5.2 Sample version of leak detector type DL 400
5.3 Approval certificate DLR-G dated 14 May 2002
5.4 Supplement with details of the dry filters for DL_4000
5.5 Parts list leak detector VL..
6. Tests
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The sample version of the leak detector in the variant DL 400 was tested with
reference to the Technical Description with design drawings and circuit
diagrams as well as installation and operating instructions and software
documentation, for compliance with the requirements of the approval
principles for leak detection systems.
The following tests were carried out:
1. Test of the electrical equipment (without taking account of explosion
protection).
2. Switching cycles at various limit temperatures (-25°C to +70°C)
3. Testing the visual and audible alarm
4. Pressure and leak tests of the installations
7 Test results
The Leak detector DL.. fulfilled the requirements stipulated in the approval
principles for leak detection systems. The parts of the sample unit conform
with the Technical Description and drawings. The function tests on sample unit
leak detector type DL400 showed that the unit withstands the loads and
remains fully functional. The parts of the electronic circuit integrated in the unit
remained fully functional even under the temperature loads.
The mechanical function tests and software test produced positive results.
Undefined measured values, incorrect calibrations and failure of the system
cycle triggered the alarm.
The function tests over 440 hours also produced positive test results. Leak
detector DL 400 fulfils the requirements made of it with regard to monitoring
the overpressure generated in the interstitial space with an automatic alarm on
reaching the alarm pressure. The leak detector pump is capable of
compensating for pressure fluctuations caused for example by changes in
temperature. The switching values of the pressure switch (alarm ON > 400
mbar, pump ON <500 mbar) are met as stated in the Technical Description.
The pressure switching values remain within the stated tolerances even at the
limit temperatures of -25°C and +70°C.
Evaluation of continuous operation of the unit as a whole – the unit was
subject to 10,000 load cycles – also produced no notable deviations in the
pressure switching values or restrictions in its functioning ability.
Measurement of the volume flow using a suspended particle flow meter
showed that the volume flow at the stated alarm switching value of 400 mbar
amounts to 85 +
adequately rated.
15 l/h (see curves). The flow rate of the pressure pump is
Pump curve leak detector DL 400:
40 von 49
The switching processes were adjusted to the upper temperature limit of
+70°C and lower temperature limit of -25°C in such a way as to trigger an
alarm within 5 minutes.
Tests of the alarm signalling device also produced positive results. The
audible alarm produces a sound level of > 70 dB(A) at 1 m distance from the
closed housing after 24 h continuous operation. The visual alarm can be
considered adequate.
The overpressure valve triggered in the pressure range stated by the
manufacturer. The overpressure valve is capable of dissipating the entire flow
output of the overpressure pump so that the interstitial space of the tank is
protected with regard to an excessive increase in pressure after the tank has
heated up or following failure of the pressure switch.
The electrical installation in the switching box complies with the DIN VDE
regulations. An external alarm lead is protected by switching a potential-free
relay, with an additional fuse to protect the unit from the circuit of the outer
alarm.
The leak detector with type designation DLG.. is identical to the leak detector
DLR-G which was already certified with the approval certificate dated 14 May
2002 and approved with approval number Z-65.26-349, so that its suitability
for the intended application was already verified in the approval process.
Suitability of the adequate capacity of the dry cartridges was already verified in
the approval process for leak detector type DL-4000.
8 Assessment
Leak detector type DL../DLG.. is suitable as a component in a leak detection
system based on overpressure and fulfils the requirements of the approval
principles for leak detection systems. The leak detector as component in an
overpressure leak detection system constitutes a safety device in accordance
with §19h Water Resources Act for rapid, reliable detection of leaks in water
polluting liquids when the following conditions are met:
1. The leak detector variants are to be produced, adjusted and operated in
accordance with the Technical Description dated 22 April 2004.
2. The corresponding leak detector type must only be used for the
interstitial spaces stated in the section "Limits of operation" in the
Technical Description. The corresponding leak detector type must be
selected so that the alarm switching pressure is always at least 30 mbar
41 von 49
above the static pressure of the stored liquid, taking account of possible
overlay pressure in the tank. In the case of a sump, the maximum liquid
hight of the liquid being collected must be taken into consideration. The
units are to be selected on the basis of the tables contained in Annex B
of the Technical Description dated 21 April 2004.
3. The details stated by the manufacturer in the operating instructions
must be heeded for producing and sustaining the operating pressure of
the leak detector. The leak detectors are to be operated so that the
tolerable operating pressure of the interstitial space is not exceeded.
For leak detector type DLG.., fundamentally only pressure reducers
should be used with a maximum setting range for the pressure reducing
valve 5% to 10% below the test pressure of the interstitial space.
Otherwise, overpressure valves must be provided to prevent the
pressure from exceeding the maximum tolerable operating pressure in
the interstitial space.
4. The supply pressure for the leak detector DLG.. stated in the Technical
Description for the pressure accumulator must be heeded because
otherwise, the re-fill quantity of leak detector medium deviates from the
tolerable value stated in the approval principles.
5. Every leak detector must be marked indelibly and legibly with at least
the following details:
Manufacturer or manufacturer's symbol
Year of production
Production number
Approval code
Type designation
Nominal operating data.
6. Every leak detector must undergo individual testing before delivery. The
requirements of ZG LAGR No. 7 must be observed in terms of
production monitoring.
7. Every leak detector must be accompanied by installation and operating
instructions together with a copy of the approval certificate and, in the
case of type DL.., corresponding documentation for the dry filters
(cartridges) to be used and the corresponding interstitial space sizes.
9 Note
Compliance with the requirements for explosion protection, electromagnetic
compatibility and the low voltage directive was not part of the tests.
/round stamp/signature/
Surveyor of the Technischer Überwachungs-Verein Nord e.V.
Test department for leak detection systems.
GERMAN INSTITUTE FOR BUILDING TECHNOLOG
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Public Law Institution
10829 Berlin, 5 April 2005
Kolonnenstraße 30 L
Phone: +49(0) 30 78730-364
Fax: +49(0) 30 78730-320
Ref: III 14-1.65.23-9/05
General Building Inspectorate Approval
Approval number: Z-65.23-409
Applicant: Sicherungsgerätebau GmbH
Hofstraße 10
57076 Siegen
Approval item: Overpressure leak detector type DL.. and type
DLG.. as part of a leak detection system for double
walled tanks, tanks with leak detection lining or
leak detection jacketing, interstitial space of sumps
and containments for the storage of water polluting
liquids
Validity period: until 30 April 2010
The above approval item is herewith granted general building inspectorate approval.
This general building inspectorate approval consists of six pages and two annexes.
/round stamp/
German Institute
for Building Technology
Page 3 of the General Building Inspectorate Approval No. Z-65.23-409 d ated 5 April 2005
43 von 49
II. SPECIAL REGULATIONS
1. Approval item and scope of application
1.1 The subject of this general building inspectorate approval is an overpressure
leak detector type designations DL.. (with integrated pump) and DLG.. (with
integrated compressed gas supply) with the design variants for alarm pressure
switching values of >
mbar, >
1500 mbar, >
450 mbar, > 590 mbar, > 750 mbar, > 1000 mbar, > 1100 mbar, >
2000 mbar, > 2300 mbar, > 2500 mbar and > 3000 mbar
50 mbar, > 100 mbar, > 290 mbar, > 330 mbar, > 400
overpressure.
1.2 The leak detectors may be connected to suitable interstitial spac es of double
walled tanks, tanks with leak detection lining or leak detection jacketing,
sumps and containments for plant for the storage, filling and transhipment of
water polluting liquids (structure of the leak detection system see Annex 1).
1.3 Suitable interstitial space refers to interstitial space with a volume of up to 8 m³
rated with an interstitial space test pressure corresponding to the specific
design variant of the particular leak detector.
1.4 The general building inspectorate approval is issued notwithstanding test or
permit reservations in other legal areas (e.g. 1
st
Ordinance on the Machine
Safety Law – Low Voltage Ordinance – Law on Electromagnetic Compatibility
of Machines – EMC - , 11
th
Ordinance on the Machine Safety Law – Explosion
Protection Ordinance).
1.5 With this general building inspectorate approval, the approval item is not
required to undergo specific water suitability testing and type approval as per §
Law 19 h of the Water Resources Act (WHG)
1
.
2 Stipulations for the product
2.1 Properties and composition
2.1.1 A leak in the walls of the interstitial space is indicated visually and audible
when pressure falls to the alarm switching value.
2.1.2 The leak detector consists of the display and control elements, the
overpressure pump with upstream dry filter or a permanently connected
pressure cylinder or operational pressure network with inert gas or dried air,
the pressure and measuring lines with shut-off and safety valves, the pressure
sensor and electrical control components. The parts and components are
stated in the Technical Description
2
. To protect the interstitial space from
intolerable overpressures, the overpressure valves are adjusted to the opening
pressures stated in Annex B to the Technical Description.
1
Act on the Management of Water Resources (Water Resources Actw – WHG) dated 19 August 2002
2
Technical Description verified by Tüv Nord dated 11 March 2005 for the overpressure leak detector
type DL..
Page 4 of the General Building Inspectorate Approval No. Z-65.23-409 d ated 5 April 2005
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2.1.4 Verification of safe functioning of the approval item was provided according to
the "Approval principles for leak detection systems for tanks (ZG-LAGB)" of
the German Institute for Building Technology dated August 1994.
2.2 Production and marking
2.2.1 Production
The leak detectors must only be produced in the applicant's factory. They must
comply with the documentation featured in Annex 2 of this general building
inspectorate approval with regard to design, dimensions and materials.
2.2.2 Marking
The leak detector, its packaging or delivery note must be marked by the
manufacturer with the compliance symbol (Ü-symbol) according to the
compliance symbol ordinances of the federal states. The marking may only be
applied if the prerequisites as per section 2.3 are fulfilled. In addition, the leak
detector must be marked with the following details:
- type designation
- approval number
2.3 Compliance verification
2.3.1 General
Confirmation that the leak detectors comply with the stipulations of this general
building inspectorate approval must be provided for every production factory
with the manufacturer's Declaration of Conformity on the basis of inhouse
production controls and type testing of the leak detector by an acknowledged
testing agency.
2.3.2 Inhouse production controls
Inhouse production controls are to be set up and implemented in the
production factory.
Inhouse production controls are too include individual testing of every leak
detector. The individual tests by the manufacturer are to warrant that the parts
of the leak detector function reliably and comply with the tested type.
The results of the inhouse production controls are to be recorded and
evaluated. The records must include at least the following details:
- leak detector designation
- type of control or test
- date of production and testing of the leak detector
- results of the controls or tests
- signature of the person responsible for inhouse production control
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The records are to be kept for at least five years. They are to be submitted to
the German Institute for Building Technology and the highest building
supervisory authorities on demand.
In the case of unsatisfactory test results, the manufacturer must introduce
immediate measures to eliminate the defects. Leak detectors which fail to
comply with requirements must be handled in such a way so as to rule out any
risk of confusion with conforming approval items. After eliminating the fault, the
corresponding test must be repeated immediately insofar as technically
feasible and required as verification that the fault has been eliminated.
2.3.3 Type testing by acknowledged testing agency
Type testing includes the function tests stated in the "Approval principles for
leak detection systems for tanks". If verification according to the general
building inspectorate approval has been obtained in samples from on-going
production, the corresponding tests replace type testing.
3. Stipulations for the design
3.1 (1) Care must be taken to ensure that the leak detector is adequately resistant
to the liquid being stored and that the water polluting liquid does not react with
the leak detection medium.
3.2 The limits of operation of the leak detectors to ensure that the alarms are
given are stated in Annex B of the Technical Description with reference to the
maximum effective liquid pressure on the bottom of the tank (static pressure of
the stored liquid plus overlay pressure) depending on the alarm switching
value of the leak detector version.
3.3 The leak detector must only be connected to several interstitial spaces in the
case of underground tanks. The shut-off valves for every connected tank must
be set to "open" when the leak detector is operating.
3.4 Connection of the leak detectors to tanks as per section 1.2 for the storage of
liquids with flash points <
55°C is only permitted if the operating modes stated
in the Technical Description with safeguarded refilling or without safeguarded
refilling with the use of inert gas or dried air as leak detection medium, comply
with the requirements made in Annex B of DIN EN 1310-1
equipment categories as per EN 1127-1
4
.
3
regarding the
Refilling as per Annex B of DIN EN 13160-1 with air or inert gas as leak
detection medium (monitoring medium) is said to be safeguarded
- if the leak detector has an integrated pump
- if the leak detector is connected to a permanently operating
compressed air or gas network suitable for operation of the leak
detector
3
DIN EN 1310-1:09/2003, leak detection systems, Part 1 General principles
4
DIN EN 1127-1:10/1997, Explosion protection, Part 1 Principles and methods
Page 6 of the General Building Inspectorate Approval No. Z-65.23-409 d ated 5 April 2005
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- if residual pressure monitoring of the pressure cylinder with alarm
function is installed for operation with a permanently connected
pressure cylinder (stationary a pressure cylinder).
Refilling according to Annex B of DIN EN 13160-1 with air or inert gas as leak
detection medium (monitoring medium) is considered not to be safeguarded if
there is no residual pressure monitoring of the pressure cylinder with alarm
function for operation with the permanently connected pressure cylinder
(stationary pressure cylinder).
4. Stipulations for the execution
4.1 (1) The leak detector must be installed according to section 4 of the Technical
Description and started up according to section 5 of the Technical Description.
Installation, servicing, repairs and cleaning of the leak detector must only be
contracted to such companies which are specialist companies for these
activities in accordance with § 19 I Water Resouces Act (WHG).
(2) The activities as per (1) do not have to be carried out by specialist
companies if they are featured under the exceptions for mandatory specialist
companies according to the national regulations or the manufacturer of the
approval item carries out these activities with his own specially qualified staff.
This does not affect the occupational safety requirements.
4.2 The leak detectors must be installed outside potentially explosive areas in a
dry room, or in a protective box when installed in the open air.
5 Stipulations for use, servicing, maintenance and recurrent tests
The leak detection systems with leak detectors must be operated and
maintained according to section 6 of the Technical Description. The
manufacturer must include the Technical Description with the delivery.
/round stamp/
German Institute for
Building Technology
/signature/
Certified
Dr. Ing. Kanning
EC DECLARATION OF CONFORMITY
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We,
Sicherungsgerätebau GmbH
Hofstraße 10
D- 57076 Siegen
hereby declare in sole responsibility that the leakage probes
DL.., DLR-P..
comply with the essential requirements of the EC directives listed below.
This declaration shall lose its validity if the device is modified without consulting us.
Number / short title Satisfied regulations
2004/108/EC
EMC Directive
73/23 EEC
Low Voltage Directive
89/106/EEC
Construction Products
Directive
94/9 EEC
Equipment in Potentially
Explosive Atmospheres
EN 61 000-6-1: 2001
EN 61 000-6-2: 2000 + A2: 2005
EN 61 000-3-2: 2000 + A2: 2005
EN 61 000-3-3: 1995 + A1: 2001 + A2: 2005
EN 60 335-1: 2002
EN 61 010-1: 2001
EN 60 730-1: 2000
EN 13 160-1-2: Approved body: TÜV-Nord, Hamburg
The leak detector with its pneumatic parts may be connected to
spaces (interstitial spaces of tanks / pipelines / fittings) which are
required for category 3 devices. The following documents were
used:
EN 1127-1: 1997
EN 60 079-10: 1996
EN 13 160-1-2: 2003
EN 13463-1: 2001
The ignition hazard analysis did not result in any additional
hazards.
Compliance is declared by
Martin Hücking
(Technical Director)
L:\ÜBERSETZUNGEN\DOKUMENTATIONEN\ENGLISCH\DL\15-1-Declaration DL..-DLR-P...DOC Last updated: June 2006
EC DECLARATION OF CONFORMITY
48 von 49
We,
Sicherungsgerätebau GmbH
Hofstraße 10
D- 57076 Siegen
hereby declare in sole responsibility that the leak detectors
DLG ..; DLR-G..
comply with the essential requirements of the EC directives listed below.
This declaration shall lose its validity if the device is modified without consulting us.
Number / short title Satisfied regulations
2004/108/EC
EMC Directive
73/23 EEC
Low Voltage Directive
89/106/EEC
Construction Products
Directive
94/9 EEC
Equipment in Potentially
Explosive Atmospheres
EN 61 000-6-1: 2001
EN 61 000-6-2: 2000 + A2: 2005
EN 61 000-3-2: 2000 + A2: 2005
EN 61 000-3-3: 1995 + A1: 2001 + A2: 2005
EN 60 335-1: 2002
EN 61 010-1: 2001
EN 60 730-1: 2000
EN 13 160-1-2: Approved body: TÜV-Nord, Hamburg
The leak detector with its pneumatic parts may be connected to
spaces (interstitial spaces of tanks / pipelines / fittings) which are
required for category 3 devices and also, under specific
conditions, to spaces which are required for category 1 device.
The following documents were used:
EN 1127-1: 1997
EN 60 079-10: 1996
EN 13 160-1-2: 2003
EN 13463-1: 2001
The ignition hazard analysis did not result in any additional
hazards.
Compliance is declared by
Martin Hücking
(Technical Director)
L:\ÜBERSETZUNGEN\DOKUMENTATIONEN\ENGLISCH\DL\15-2-Declaration DLG..-DLR-G...DOC Last updated: June 2006
Warranty
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Dear customer,
You have purchased a high-quality leak detector from our company.
All of our leak detectors undergo a 100% quality control examination.
The type plate with the serial number is only affixed after all test criteria have been complied with.
The warranty period for our leak detectors is 24 months, beginning on the date of installation on
site.
The maximum warranty period is 27 months from our date of sale.
Our warranty will be effective only if the customer submits to us the functional report or test report
on initial putting into service, prepared by a recognised company specialised in water and water
protection systems, including the serial number of the leak detector.
Our warranty shall not apply in the event of faulty or improper installation or improper operation, or
if modifications or repairs are carried out without the manufacturer's consent.
In case of malfunction, please contact your local specialist company:
Stamp of the specialist company
Yours sincerely
Sicherungsgerätebau GmbH
Hofstraße 10 - D - 57076 Siegen
+49 / 271 / 48964 - 0
Fax: +49 / 271 / 48964 - 6
L:\ÜBERSETZUNGEN\DOKUMENTATIONEN\ENGLISCH\GARANTIE-ERKLÄRUNG NEU-GB.DOC
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