Operating instructions

Page 12
ProMinent
®
Notes on safety of ProMinent
®
metering pumps
1.1 General notes
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”!
• The equipment/devices may only be used for their intended purpose.
•ProMinent
®
metering pumps must not be assembled with parts which are not tested and
recommended by ProMinent otherwise this can lead to injury to persons and damage to
property for which no liability will be accepted!
• Pumps must be accessible at all times to facilitate operation and maintenance. Access
points must not be obstructed or blocked!
• Before carrying out any maintenance and repair work always drain off and flush out the
liquid end first if hazardous or unknown metered media are used!
• When metering hazardous or unknown liquids, always wear safety clothing (safety
goggles, gloves, ...) when working on the liquid end!
•You must observe the guidelines in this operating instructions manual and the ”General
operating instructions manual for ProMinent
®
motor-driven metering pumps and
hydraulic accessoires” on assembly, installation and maintenance!
1.2 Notes on installation, start-up and operation
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”!
• The metering pump can contain water residue in the liquid end as the result of testing at
the factory!
If handling media which must not come in contact with water, all traces of water must be
removed from the liquid end before start-up! For this purpose, turn the pump through
180˚ and drain off the liquid end then flush with a suitable medium from above via the
intake connection!
• Do not connect mains voltage to the control cable!
• When operating the metering pump against a closed shut-off element on the pressure
side or in the event of pressure peaks during the metering stroke, the system pressure
can reach a multiple of the maximum permissible operating pressure that can conse-
quently cause the pressure line to burst!
To avoid this situation, an overflow is recommended for the purpose of limiting the
maximum permissible operating pressure of the pump or system.
• Do not connect a metal bypass line to the overflow valve on the PVT delivery unit! This
could cause cracks in the delivery unit!
• Leaks can develop in the relief valve can or parts of it can corrode! For this reason, the
bypass line should only be routed falling continuously and, moreover, the tubing nozzle
should only be inserted facing downwards (see fig. 1)!
• No chemical residues must remain in the bypass line on the relief valve of the liquid end!
Fig. 1
BA_SI_036_06_10_EN.p65 08.06.2010, 11:38 Uhr12