Operating instructions

Page 13
ProMinent
®
IMPORTANT
• Set stroke length only with pump in operation!
• Pull the red plug for venting the gear unit during initial operation of the Sigma/ 2 metering
pump (refer to Fig. 3, item 10)!
NOTE
• The pump must be secured in such a way that no vibrations can occur! The valves of the
liquid end must always be positioned vertically in order to ensure trouble-free operation!
• Suction, discharge and bypass lines must always be routed in such a way that a
mechanically stress-free connection is ensured to the dosing head!
The lines must be secured such that no vibrations can occur!
• Only use the clamping rings and hose sockets intended for the relevant hose diameter as
well as original hoses with the specified hose dimensions and wall thickness otherwise
the stability and durability of the connection will not be guaranteed!
Avoid reducing hose sizes!
Observe the permissible pressure of the hoses!
• The pump is supplied with PTFE moulded composite seals with a flare, which are used
for the pump connections that seal the connections between the grooved pump valves
and the grooved ProMinent (fig. 3).
But if such an insert of a connection is not fluted (e.g. third-party part), a flat elastomer
gasket has to be used (fig. 3). Otherwise, leakage may occur at this connection.
•A vent with return to the supply tank is advisable when metering extremely aggressive or
hazardous media!
In addition, a shut-off valve should be provided on the delivery or intake side!
1.3 Notes on maintenance and repair
WARNING
• Only EX pump: Please thoroughly read the chapter “Important Additions for Metering
Pumps in the EX Area” of the “General Operating Instructions ProMinent Motor Metering
Pumps and Hydraulic Accessories”!
• Only send the equipment for repair or maintenance in a cleaned condition and with the
liquid end flushed. However, should any safety precautions be necessary even after
careful draining and cleaning of the equipment, the required information must be listed
in the Safety Declaration!
The Safety Declaration forms part of the inspection/repair contract.
Maintenance or repair work will only be carried out if a Safety Declaration - correctly
and fully completed by an authorised and qualified member of the Operator’s staff -
is available.
A copy of the form is included in the “General operating instructions for ProMinent
motor-driven dosing pumps and hydraulic accessories” or can be downloaded at
www.prominent.com.
• Only specially trained and authorized persons are permitted to carry out maintenance on
metering pumps and their peripherals!
• If hazardous or unknown metering media are used, always flush out the liquid end first
before carrying out any maintenance and repair work!
• When metering hazardous or unknown liquids, always wear safety clothing (safety
goggles, gloves, ...) when working on the liquid end!
• Always depressurize the delivery line first before carrying out any work on the pump!
Always discharge and flush liquid end!
Observe safety data sheets for metered liquid!
• Disconnect power plug or power supply line before opening the plug!
Isolate relay option if applicable!
Check to ensure power is disconnected!
Secure pump while carrying out repairs to ensure it cannot be switched on unintentionally!
• Pumps for metering radioactive media must not be shipped through standard channels!
NOTE
The metering pump must be in a cleaned condition with the liquid end flushed if returned
for repair!
Notes on safety of ProMinent
®
metering pumps
Fig. 2
Fig. 3
BA_SI_036_06_10_EN.p65 08.06.2010, 11:38 Uhr13