Pump curve leak detector DL 400:
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
40 von 49
Summary of Contents for DL 100
Page 20: ...Ex Ex Ex 17 102 72 73 43 13 27 11 2002 M1 060 000 76 30 21 20 70 20 von 49 ...
Page 21: ...Ex Ex Ex 73 73 73 230 V 50 Hz 21 02 43 20 13 72 27 11 2002 M2 060 000 71 69 01 09 21 von 49 ...
Page 26: ...22 84 85 85 22 52 98 98 0 Kl 1 0 17 12 2002 P 115 392 21 21 20 20 90 90 26 von 49 ...
Page 34: ...28 06 2005 Drilling Dimension 200 300 260 220 T 140 8 34 von 49 ...
