M&C TechGroup SR25.1_Ex Operator's manual - Manual (Page 11)

3-7.1-ME Gas sampling and gas conditioning technology 11
D A N G E R !
The peristaltic pumps SR25.1 and SR25.2-G must not be operated in
hazardous areas.
N O T E !
The pump must only be used in the conditions specified in the
technical data. The pump should be installed away from heat sources
and freely ventilated to prevent any accumulation of heat.
For outdoor installation, the pump must be installed in a housing
protected from frost in the winter and sufficiently ventilated in
summer. Exposure to direct sunlight must be avoided.
D A N G E R !
It is therefore essential to provide protection for persons against
contact with alive parts (e.g. electrical connections, motor windings)
and moving parts (e.g. fan). Protection against the entry of foreign
bodies must also be provided.
11
SUPPLY CONNECTIONS
11.1 HOSE CONNECTIONS
 The tube connections are on the upper side of the pump. The standard threaded hose
couplings are DN4/6. Tube connections with hose nipples are available as an option (see
spare parts list chapter 16).
N O T E !
Do not mix up hose-/tube connections for sample gas inlet and outlet;
the connections are marked accordingly! Check for tightness of all
sample lines after connection!
The hoses are to be assembled as follows:
 Remove the union nut from the sealing ring couplings by turning it anti-clockwise. The nut
should be removed from the thread with great care so as to ensure that the loose sealing ring
in the nut is not lost.
 Place the union nut over the connecting hose.
 Place the sealing ring over the connecting hose with the thicker bead towards the nut.
 Place the hose over the nipple on the thread.
 The union nut is to be screwed tight by hand.
 The hose will no longer be able to slip off, and is now compression-proof.
The hoses are to be removed in the reverse order.