Speck pumpen V 430 - 7 Measuring-, Control- and Regulation Technology (MCR); 7.1 Required MCR-equipment

Speck Pumpen Vakuumtechnik GmbH
zertifiziert: DIN EN ISO 9001
Supplementary Operating Instructions for Explosion Protection
7
7 Measuring-, Control- and Regulation Technology (MCR)
All MCR-equipment used must be tested and approved for explosion protection according to Directive
94/9/EC. The requirement profile of each individual invigilator as well as the associated control circuit
must correspond to IPL-1 according to EN 13463-6.
• Measuring instruments, which contact the conveying medium : Category 1
• Measuring instruments for the external environment : Category 2
7.1 Required MCR-equipment
LS-
02
LS-
03
FS-
04
TS+
05
LS-
01
PS+
06
Anti cavitation
protection
Operating liquid pipe
to the suction casing
Operating liquid pipe
to the pressure casing
(optional)
Operating liquid pipe
to the pressure casing
(optional)
Fig. 7.1. MCR at the liquid-ring compressor
With employment of the compressor for the conveying of gases and vapours which contain hydrogen, in
addition to the MCR at the liquid-ring compressor according to Fig. 1 on the site of the installation, the
MCR technology corresponding to the switching diagrams according to Fig. 5.1 and 5.2 is also to be
installed for flushing with inert gas.