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UST Program - LG 113

UST Programs - LG 113

Issue Date: April 22, 2003
Revision Date: June 10, 2004

 

SGB (Sicherungsgeratebau GmbH)

Vacuum Leak Detection System Models VLX 30, VLX 350, and VLX 400

CONTINUOUS INTERSTITIAL TANK SYSTEM MONITORING METHOD (PRESSURE/VACUUM)

Certification:
Certified per European leak detection standard prEN 13160-2, Part 2, Version 2, as a Class I leak detection system.

Operating Principle:
System uses an integral vacuum pump to continuously maintain a partial vacuum within the interstitial space of a double-walled tank. System is designed to activate a visual and acoustic alarm before stored product can escape to the environment. System is capable of detecting breaches in both the inner and outer walls of double-walled tanks.

Alarm Condition:
System alarms when liquid enters the interstitial space or an air leak occurs where the interstitial vacuum decreases (pressure increases) to the appropriate ďAlarm \'On\' Pressure" (See table below).

Applicability:
Double-walled or lined single-walled horizontal (underground or aboveground) cylindrical tank with flat or dished head, storing gasoline, gasohol, diesel, heating oil #2, kerosene, aviation fuel, motor oil, water. Other liquids such as hydrocarbons, chemical solvents or alcohols that can be stored at atmospheric pressure having vapors heavier than air may be used after consultation with manufacturer.

Manufacturer's Specifications:
The interstitial space shall be rated for the operating vacuum of the leak detector as indicated in the following table, regardless of temperature and groundwater level fluctuations

Model

Pump Off
(Operating vacuum is reached)
 

Alarm On
(Leak exceeds pump capacity)

Restrictions

VLX 30

1.2 + 0.25 psi

0.7 + 0.25 psi

Not for use where suction line is mounted on top of tank.

VLX 350

6.6 + 0.4 psi

5.4 + 0.3 psi

Tank diameter cannot exceed 10 feet 6 inches unless the suction line is mounted at lowest point in the interstitial space.

VLX 400

7.4 + 0.4 psi

6.1 + 0.3 psi

Tank diameter cannot exceed 12 feet unless the suction line is mounted at lowest point in the interstitial space.

Calibration:
Functional and operational safety tests must be performed annually in accordance with manufacturer's instructions.

Comments:
Interstitial space is tested continuously.
System is connected to the interstitial space by a suction line and a pressure measuring line.
Vacuum is generated by an integral pump and is measured and controlled by a pressure switch.
This system may not be compatible with all secondarily contained tanks and/or piping. Always consult with the tank and/or piping manufacturer and the manufacturer's applicable recommended installation practices before installing this system, or damage may be caused to the tank or piping by its use.
 

SGB (Sicherungsgeratebau GmbH)

Evaluator:  TUV (Technischer Uberwachungs-Verein Nord e.V.)

Hofstrabe 10

Date of Evaluation: 05/24/02

57076 Siegen, Germany

 

Tel:  +49/ (0) 271 / 48964-0

 

E-Mail: Sgb-mail@t-online.de

 

   

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Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the performance of the method or equipment.
Equipment should be installed and operated in accordance with all applicable laws and regulations.
For full details, please refer to our expanded "DISCLAIMER" page.

 
 

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