Pump Solutions Group Neptune Solenoid-driven Diaphragm Metering Pump ARPZ-31_61_12 - Manual (Page 26)

25
Operation
• When using the pump for the first time
• When resuming operation after a prolonged shutdown of operation
• When the pump is gas-locked
• When the tank is empty
Air releasing
(page 26)
• When using the pump for the first time
• When changing the discharge volume Discharge-volume setting
(page 28)
• When shutting down operation for a prolonged period
• When resuming operation after a prolonged shutdown of operation
Procedure for prolonged
shutdown of operation
(page 28)
Operating precautions
WARNING !
• Ensure that nobody other than the operators and control personnel will operate the pump.
• Do not operate the pump with wet hands. Doing so may result in electric shocks.
• When trouble has occurred (such as when smoke appears or there is a smell of burning), shut down the
pump’s operation immediately, and contact your vender or a TACMINA representative. Otherwise, a fire,
electric shocks and/or malfunctions may result.
• A situation in which the valve inside the pipe at the discharge side of the pump is shut off or becomes
blocked with foreign matter is dangerous in that it may lead to an excessive rise in pressure that will
exceed the pump’s specification range, causing liquid to gush out, the pipe to be damaged and the
pump itself to malfunction. Prior to operating the pump, check the valves and pipes, etc.
! CAUTION
• When working on the liquid-end parts of the pump, wear protective gear suited to the chemical concerned
(such as rubber gloves, a mask, protective goggles and work overalls that are resistant to chemical).
• The vibration of the pump may cause the hoses/tubes to become loose and disconnected. Before
starting operation, secure the hoses/tubes and check their tightness.
• While the pump is operating, the pump’s surfaces may become hot, reaching a temperature of 60°C or more.
• Idling the pump for prolonged periods of time can lead to malfunctions.
Check the following points.
Before operation
Check location Details of check Notes
Tank
Check whether the amount of liquid is sufficient.
If it is not, replenish it. Take special care in cases where the chemicals or process-
es involved would be adversely affected if air were sucked in.
Pipes
Check whether any pipes have become disconnected or damaged.
If so, re-connect or make repairs.
−
Valves
Check that the valves are open.
If a valve is closed, open it. Closed valves can cause dangerous situations in which the pressure
rises excessively, liquid gushes out and/or the pipes are damaged.
Power supply
Check that the pump is connected properly to the
prescribed power supply. If it is not, the electronic circuits and solenoids
may burn out.
During operation
Check location Details of check Notes
Pump head
Check whether any liquid is leaking from the hole under-
neath the auxiliary ring at the back of the pump head. If liquid is leaking, it may mean that the diaphragm is damaged.
Inspect the diaphragm.
Joints/pipes Check for liquid leaks and looseness.
If liquid is leaking or there is a loose joint, replace
or tighten it.
If liquid still leaks, inspect the O-rings in the joint concerned.
Discharge-side
pressure
Check the pressure gauge on the discharge side.
If the gauge shows an abnormal value, a pipe or
valve may be blocked.
Inspect the pipes.
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