SIGMA S2Ba - Manual (Page 14)

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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. 2, 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!
• The intake and delivery lines must always be arranged such as to ensure connection at
the liquid end is free of mechanical stress!
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!
• 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!
1.4 Notes on maintenance and repair
WARNING
• 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!
DANGER
• 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