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SGB VLXE Series Documentation

Vacuum leak detector
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Vacuum leak detector VLXE ..
Please read the instructions before commencing any work
Last updated: 10/2019
Item no.: 602 222

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  • Page 1 Documentation Vacuum leak detector VLXE .. Please read the instructions before commencing any work Last updated: 10/2019 Item no.: 602 222...

  • Page 2: Table Of Contents

    Contents Table of Contents General ............... 4 Information Explanation of symbols Limitation of liability Copyright Warranty Customer Service Safety ................6 Intended use Responsibility of the operating company Qualification Personal protective equipment Basic hazards Technical Data ............9 General data Electrical data Ex data Switching values...
  • Page 3 Contents 11. Disassembly and disposal ........42 11.1 Disassembly 11.2 Disposal 12. Appendix ..............43 12.1 Use on interstitial spaces that are filled with leak detection liquid 12.2 Dimensions and drilling template 12.3 EU declaration of conformity 12.4 Declaration of performance 12.5 Manufacturer’s declaration of compliance 12.6 TÜV-Nord certification VACUUM LEAK DETECTOR VLXE ..

  • Page 4: General

     Deployment of unqualified personnel  Unauthorized conversions  Connection to systems not approved by SGB Copyright  The contents, texts, drawings, pictures, and any other representations are protected by copyright and are subject to industrial property rights. Any misuse is a criminal offence.

  • Page 5: Warranty

    Our Customer Service department is available to provide you with in- formation. You can find information about contacts on the World Wide Web at www.sgb.de or on the rating plate of the leak detector. VACUUM LEAK DETECTOR VLXE .. - 5 -...

  • Page 6: Safety

    Safety 2. Safety Intended Use  Leak detector fitted in the open air outside the explosion hazard area (also possible in the building under the conditions listed)  Conditions from Sec. 3.5 “Field of application” must be complied with.  Pressureless double-walled tanks and pressureless double-walled pipes, if any explosive steam-air-mixtures and vapors that occur comply with these conditions: o Explosion group IIA to IIB3...

  • Page 7: Qualification

    The personnel must be sufficiently qualified to recognize and avoid possible dangers on their own. Companies that put the leak detector into operation should have been trained at SGB, by SGB or by the authorized representative. WARNING! National regulations must be complied with.

  • Page 8: Basic Hazards

    Safety 2.41 Personal protective equipment when working on systems which pose an explosion hazard The parts listed here apply in particular to safety when working on systems which pose an explosion hazard. If work is carried out in areas with a potentially explosive atmosphere, the following items of equipment are required as an absolute mini- mum: ...

  • Page 9: Technical Data

    -570 mbar -700 mbar -900 mbar Special switching values can be agreed between the customer and SGB. * Lower values can be agreed, but an underpressure valve must then be integrated into the leak detector. ** interstitial space VACUUM LEAK DETECTOR VLXE ..

  • Page 10: Field Of Application

    Technical Data Field of application 3.5.1 Vessel a) Single-walled (underground/above-ground), cylindrical tanks with leak protecting lining (LPL) or leak protecting jacket (LPJ) and the suction line up to the low point Usage limits: none in relation to density and diameter b) Double-walled, horizontal cylindrical tanks (underground/above- ground) (e.g.
  • Page 11 Technical Data Usage limits: Diameter Height Max. density of the material being [mm] [mm] stored [kg/dm 330 to 570  2,820  1.9  1.9  1.9  1.9 1600  3,740  1.6  1.9  1.9  1.9 ...
  • Page 12 Technical Data 3.5.2 Pipes/tubes In the design manufactured either in the plant or on-site Usage limits: in accordance with the Table in Sec. 3.5.1 in b), where the height between the low point of the interstitial space and the node point (junction of the suction line and measuring line, generally in the assembly kit or manifold, see also 5.7.4 ff) is to be used instead of the tank diameter.

  • Page 13: Design And Function

    Design and function 4. Design and function Design Interior view with: Detonation flame arrester Three-way valve in suction line Three-way valve in measuring line Vacuum pump Buzzer Display board Main circuit board Heater Pressure sensor Membrane keyboard Normal operation The vacuum leak detector is connected to the interstitial space through the suction, measurement and connection line(s).

  • Page 14: Air Leak

    Design and function the interstitial space is evacuated until the operating underpressure (Pump OFF) is reached. Depending on the level of tightness and temperature fluctuation in the overall system, the underpressure alternates between the Pump OFF switching value and the Pump ON switching value, with short pump running times and longer down times.

  • Page 15: Display And Control Elements

    Design and function Display and control elements 4.5.1 Display Signal Operat- Alarm, under- Alarm Magnetic Device lamp ing sta- pressure below probe valve fault fault “Alarm ON” OPERA- TION: green ALARM: ON (flashing) (flashing) ALARM (flash- yellow ing) 4.5.2 Function: "Switch off audible alarm signal" Briefly press the "Mute"...
  • Page 16 Design and function 4.5.4 "Leak tightness check” function Press the "Mute" button and keep it pressed until the "Alarm" signal lamp flashes quickly, then release. A value for the leak tightness is (103) shown on the display (103). The same value is indicated by the num- ber of times the “Alarm”...

  • Page 17: Installation Of The System

    Installation 5. Installation of the system 5.1 General Information - Before starting work, the documentation must be read and under- stood. If anything is unclear, please contact the manufacturer. - Take manufacturer approvals into account for the vessel/pipe or the interstitial space. - The safety instructions in this documentation must be observed.

  • Page 18: Pneumatic Connection Cables

    Installation - If the leak detector is used on containers with internal overpres- sures of max. 50 mbar (e.g. Gas recirculation), it must be fitted at least 1 meter above the top of the vessel. - Air supply and ventilation lines must be kept clear. - Integrate the leak detector housing into the equipotential bonding system.
  • Page 19 Installation o The exhaust ends in Zone 1 (for example remote filling shaft or catch area): A detonation flame arrester is provided at the end of the ex- haust line . Condensate traps are to be provided at low points; the liquid stop valve can be dispensed with if the end of the ex- haust ends in an area that is liquid-tight according to the Water Act (e.g.

  • Page 20: Making Pneumatic Connections

    Fitting the connection to the vessel interstitial space (1) Generally according to the guidelines of the container manufac- turer. (2) SGB offers assembly kits with various connection kits. 5.4.2 Fitting the connection to the pipe interstitial space or test valves (1) Generally according to the requirements of the manufacturer of the pipeline / interstitial space.

  • Page 21: Electrical Lines

    Installation 5.4.3.2 Clamping ring screw fitting for metal and plastic pipes (1) Insert support sleeve (only plastic pipe) into the pipe end (2) Insert pipe (with support sleeve) as far as the stop (3) Tighten nut of screw connection by hand to the resistance; then turn further 1¾...
  • Page 22 Installation (4) Terminal assignment: (See also block diagram Sec. 5.6.3) Mains power supply connection (100…240 V AC) Earth for the mains power supply connection assigned (vacuum pump) 5+/6- External signal (assigned to internal buzzer if applicable) 24 V DC 9/10 Special contacts, the potential-free contacts of a leak detection probe can be connected here.
  • Page 23 Installation (4) Check cable for tightness and connect other cables to the termi- nals in the same way. 5.6.2 Equipotential bonding - The housing of the leak detector is to be incorporated into the equipotential bonding of the entire system using the bolts provid- - The fittings in the connection lines also need to be integrated into the equipotential bonding system, particularly if plastic pipes (con- nection lines to the tank) have been used.
  • Page 24 Installation 5.6.3 Block diagram (SL 854 210) Pump (24 V DC) Buzzer, if applicable Main circuit board Heater Pressure sensor Display Power supply 24 V DC Membrane keyboard Contacts for serial data transfer Membrane keyboard connection strip Magnetic valve monitoring boards Ethernet board (if available) PCB for maintenance display - 24 -...

  • Page 25: Installation Examples

    Installation 5.7 Installation examples 5.7.1 Cylindrical tank with LPL and suction line to low point Stop cock Exhaust Detonation flame arrester Three-way valve, suction line Three-way valve, measuring line Liquid stop valve Measuring line Suction line Interstitial space Nozzle for installation pump Suction line to low point VACUUM LEAK DETECTOR VLXE ..
  • Page 26 Installation 5.7.2 Cylindrical, horizontal tank, double-walled, steel, without suction line to low point Stop cock Exhaust Detonation flame arrester Three-way valve, suction line Three-way valve, measuring line Liquid stop valve Measuring line Suction line Interstitial space Nozzle for installation pump - 26 - VACUUM LEAK DETECTOR VLXE ..
  • Page 27 Installation 5.7.3 Cylindrical, standing tank with suction line led down in accordance with DIN 6618-2 Stop cock Exhaust Detonation flame arrester Three-way valve, suction line Three-way valve, measuring line Liquid stop valve Condensate trap Measuring line Suction line Interstitial space Nozzle for installation pump VACUUM LEAK DETECTOR VLXE ..
  • Page 28 Installation 5.7.4 Double-walled pipe (as per 3.5.2), connected in parallel 1 Stop cock Test valve Exhaust Suction line Detonation flame arrester Connecting line Three-way valve, suction line Nozzle for installation pump Three-way valve, measuring line Double-walled tube Liquid stop valve Expansion vessel Liquid stop valve, connected against the direction of flow Node point...
  • Page 29 Installation 5.7.5 Double-walled pipe, connected in parallel 2 Stop cock Exhaust Detonation flame arrester Three-way valve, suction line Three-way valve, measuring line Liquid stop valve Liquid stop valve, connected against the direction of flow Measuring line Solenoid valve Test valve Suction line Connection line Nozzle for installation pump...
  • Page 30 Installation 5.7.6 Double-walled pipe, connected in series ÜR 1 ÜR 2 Stop cock Exhaust Detonation flame arrester Three-way valve, suction line Three-way valve, measuring line Liquid stop valve Measuring line Test valve Suction line Connection line Nozzle for installation pump Double-walled pipe Pressure compensation vessel Node point...
  • Page 31 Installation 5.7.7 Double-walled pipe, individual pipe with low vacuum VLXE 34 Denotation flame arrester Three-way valve, suction line Three-way valve, measuring line Liquid stop valve Measuring line Test valve Suction line Connecting line Double-walled tube Pressure compensation vessel Node point Here: must (geodetically) be under 157! Lowest point of the interstitial space VACUUM LEAK DETECTOR VLXE ..

  • Page 32: Commissioning

    Commissioning 6. Commissioning (1) Do not perform the start-up until the points from section 5 "Instal- lation" have been fulfilled. (2) If a leak detector is put into operation on a tank or a pipe which is already in operation, then special protection measures need to be taken (e.g.
  • Page 33 Commissioning (7) After reaching the operating underpressure of the leak detector (pump in the leak detector switches off), the three-way valve 20 must be rotated by 180° and the pump must be switched off and removed. (8) Rotate three-way valve 21 by 180° and remove pressure measur- ing instrument.

  • Page 34: Functional Check/Maintenance

    Functional check and maintenance 7. Functional test and maintenance 7.1 General (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 switches on frequently or runs continuously, this indi- cates that leaks are present that must be rectified within a rea- sonable time.

  • Page 35: Functional Check

    - Setting up of the operating state (section 7.3.8) - Completion of a test report with the confirmation of functional and operation safety. (Test reports are available for downloading on the SGB website.) 7.3.1 Checking and if necessary, emptying condensate traps IMPORTANT: Condensate traps may contain the product being stored/transported.
  • Page 36 Functional test and maintenance (4) Close condensate traps. (5) Three-way valves back to the operational setting. (6) Re-open the cocks closed under No. (1). 7.3.2 Continuity test of the interstitial space The continuity test checks that an interstitial space is connected to the leak detector and that it has sufficient continuity for an air leak to cause an alarm.
  • Page 37 Functional check and maintenance 7.3.4 Check of the switching values with test equipment (Accessories section) (1) Connect test device to a free nozzle on each of three-way valves 20 and 21. (2) Connect measuring instrument to the T-piece of the test device. (3) Close the needle valve of the test device.
  • Page 38 Determine the testing time for each connected interstitial space (or the entire monitored system) (calculate it or use the prepared SGB GmbH test reports). (2) Connect test measuring instrument to the spout of the three-way valve 21 and rotate the tap by 180°.

  • Page 39: Fault (Alarm)

    Fault (Alarm) 8. Fault (Alarm) 8.1 Alarm description If there is an alarm, it can be assumed that there is an explosive steam-air mixture in the interstitial space. Take appropriate protective measures. (1) An alarm is indicated by the signal lamp lighting up; the acoustic signal sounds, if one exists.

  • Page 40: Spare Parts

    Spare parts 9. Spare parts PCBs 331665 VD SMD PCB or LED or transformer in the housing with forwarding boards for 24 V (MVS) 331725 Display PCB for electronic leak detector VL, VLR, DL, DLG, DLR-G, DLR-P Pump 201003-MSV Vacuum pump 24 V DC, 34 mbar Brass, Viton seal set Sensor 344506-01...

  • Page 41: Accessories

    Accessories 10. Accessories Accessories can be found on our web site www.sgb.de such as - Assembly kits - Electrical separating pieces - Manifolds - LOD service (data remote transfer) o here DTM with GSM o here DTM with ETH - Optional design “Service indication Si” (variably adjustable service interval) VACUUM LEAK DETECTOR VLXE ..

  • Page 42: Disassembly And Disposal

    Disassembly and disposal 11. Disassembly and disposal 11.1 Disassembly Check for absence of gas and sufficient oxygen content of the air be- fore and during the work. Seal any openings gas-tight which could otherwise allow the spread of an explosive atmosphere. If possible, do not use tools capable of generating sparks (saw, angle grinder...) for dismantling.

  • Page 43: Appendix

    Appendix 12. Appendix 12.1 Use on interstitial spaces that are filled with leak detection liquid 12.1.1 Prerequisites (1) The only leak detectors that may be used are those with suitable alarm pressures depending on the vessel diameter and the den- sity of the stored goods.

  • Page 44: Dimensions And Drilling Template

    Appendix 12.2 Dimensions and drilling template T=140 - 44 - VACUUM LEAK DETECTOR VLXE .. 31/10/2019...

  • Page 45: Eu Declaration Of Conformity

    Appendix 12.3 EU declaration of conformity SGB GmbH Hofstr. 10 57076 Siegen Germany, hereby declare in sole responsibility that the leak detectors VLXE .. comply with the basic requirements of the EU Directives listed below. This declaration shall lose its validity if the device is modified or used for another purpose without our agreement.

  • Page 46: Declaration Of Performance

    Usage purpose: Class I vacuum leak detector for monitoring double-walled pipe- lines and containers Manufacturer: SGB GmbH; Hofstraße 10; 57076 Siegen; Germany Tel.: +49 271 48964-0; Email: sgb@sgb.de Authorized representative: System for assessment and verification of consistency of performance: System 3...

  • Page 47: Tüv-Nord Certification

    Appendix 12.6 TÜV-Nord certification VACUUM LEAK DETECTOR VLXE .. - 47 - 31/10/2019...
  • Page 48 Company details Text SGB GmbH Hofstr. 10 57076 Siegen Germany +49 271 48964-0 Photos and dimensions are not binding sgb@sgb.de for the extent of delivery. Subject to www.sgb.de changes. © SGB GmbH, 10/2019 - 48 - VACUUM LEAK DETECTOR VLXE .. 31/10/2019...

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