SGB VL-H9, Руководство пользователя

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M.:
Date: Feb. 98
Page: 1
Vacuum Leak Detector
VL - H9
SGB
Sicherungsgerätebau
GmbH
57076 Siegen
Page 3 of the general approval no. Z-65.22-110 issued by the Building Inspection Authorities
on April 17, 1997
I. SPECIAL PROVISIONS
1 Subject of approval and field of application
1.1 The present general approval applies to vacuum leak detectors type VL-H9 with pressure-controlled
evacuation pump for an alarm vacuum pressure of ≥ 330 mbar. The leak detectors are suitable for an
installation on double-walled tanks as specified in paragraph 3.1. Leaks in the walls of the interstitial space
are detected by pressure increase and indicated by an acoustic signal (for design of the leak detector
devices, see appendix 1).
1.2 The application is limited to double-walled steel tanks to DIN 6608-2, DIN 6616 shape A, DIN 6618-2,
DIN 6619-2, DIN 6623-2, DIN 6624-2 and DIN 4119 used for the storage of liquids incompatible with water
at ambient temperatures. The vacuum leak detectors may also be used for tanks subject to a general
approval issued by the Building Inspection Authorities, provided that the space to be monitored is suitable
for the installation of such vacuum leak detectors. They are also suitable for single-walled tanks to DIN or
single-walled tanks subject to a general approval of the building inspection authorities, provided that these
tanks are equipped with a suitable, approved lining.
1.3 This general approval confirms the functional safety of the subject of approval in the sense of paragraph
1.1. It does not signify that the components meet the requirements of the '11
th
code of the legal provisions
for the safety of devices' (code on the suitability of devices and protective systems for potentially explosive
locations – code on protection against explosion – 11
th
GSGV)' of December 1996 (Official Bulletin I, p.
1914).
2 Regulations applicable to the subject of approval
2.1 Composition
2.1.1 The subject of approval consists of various versions of the vacuum leak detector type VL-H9 comprising
at least the following components: indicator and control elements, vacuum pump, pressure switch and
electrical and/or electronic components for output signal processing:
Type VL-H9 Ex (Zone 1 and 2; direct power supply 230V)
Type VL-H9/A-Ex (Signalling unit VL-H9/ME outside of potentially explosive locations
or central signalling unit type VL-H9/ZME)
Type VL-H9/A-MV-Ex (Separated from the signalling unit VL-H9/ME-MV in the potentially
explosive location)
Type VL-H9/ME-MV-LS (Signalling unit with solenoid valve control and leakage probe type
FDL 30 of the manufacturer E Hauser GmbH + Co.)
2.1.2 The functional safety of the subject of approval in the sense of paragraph 1.1 has proved to be in
accordance with the ‘principles of approval for leak detector devices for tanks’ (ZG-LAGB) of August
1994, issued by the German Institute for Constructional Engineering.
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