(C) 2022/11 4. Installation 7
The motors used must be EC marked in accordance with Directive ATEX 2014/34/EU and with the
instructions of the manufacturer and the applicable national and local regulations.
When pumping inflammable or explosive liquids, a proper connection must be
used. Connect the parts of the assembly with the earth connections in order to
reduce the risk of static electricity.
Depending on the fluid to be pumped, high temperatures may be reached inside and around the pump:
Note that the surface temperature of the pump in normal operating conditions is
determined by the fluid it pumps. To see 4.1.1. point.
Air must be properly recirculated in order to cool the pump motor. Make sure there
is no other equipment or surfaces near the motor that may radiate additional heat
or affect the cooling of the motor. See the motor instructions manual.
The bedplate must always have a cam for earth connection. Ensure that the earth connection is
properly fitted to the bedplate.
4.4. PIPES
Before starting up the pump, make sure that the suction and discharge valves of
the pump are open.
Before closing the suction and discharge valves, make sure that the pump is
switched-off and has stopped.
When hot fluids are being pumped, pay attention to thermal dilation. In this case, use expansion washers
and pay special attention to avoid leaving the equipment electrically insulated (electrical equipotentiality)
from the rest of the assembly.
4.4.1. Shut-off valves
Use valves that are EC marked in accordance with the Directive ATEX 2014/34/EU
and in accordance with the manufacturer’s instructions and the applicable
national and local regulations.
4.5. PRESSURISATION TANK
A pressurisation tank for double mechanical seals must always be
pressurised at between 1,5 and 2,0 bar over the operating pressure of the
pump when it is functioning, even when it is in operation or stopped. See
instruction manual for the mechanical seal and pressurisation container.
Check that the instrumentation leading to the pressurisation tank is
appropriate to the work area.
4.6. ELECTRICAL INSTALLATION
Before connecting and electric motor to the system, check local regulations regarding electric safety and
standards EN 60204-1 and EN 60079-14. Also the motor manual. This motor should be Atex with adequate
protection for the working environment in which it must run.
Follow the motor manufacturer’s indications at all times.