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Inspection
Perform daily and periodic inspection to keep pump performance and safety.
Daily inspection
Check for a leak or any other abnormality during operation. If you notice any abnormal or dangerous condi
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tions, suspend operation immediately and inspect/solve problems according to "Troubleshooting". Replace-
ment of wear parts is necessary at periodic intervals. Contact us or your nearest distributor.
No.
Points to be checked
Remarks
1 Stroke rate
Observe the maximum stroke rate at each supply air pressure range.
2 Regulator set pressure
Observe the supply air pressure range at each liquid temperature.
3
Air flow rate
Use a flow meter. Observe the maximum air consumption.
4 A leak from an air or liquid line Check line connections
* The maximum stroke rate changes with supply air pressure. See page 67 for detail.
* The supply air pressure range changes with liquid temperature. See page 67 for detail.
Periodic inspection
Check the following items every month.
1. Stroke rate reduction
Stroke rate reduces as air leaks. The wear of shaft packing is a cause of air leak. Replace the shaft packing
as necessary.
*Shaft packing replacement should be conducted by Iwaki.
2. Air and liquid leak
If air or liquid leak is detected from the cylinder, release the discharge pressure and the supply air pressure,
and leave the pump until it cools down to ambient. Then retighten the stud bolts by 30N
•
m.
3. Valve assembly and bellows
Valve assembly and bellows are wear parts and need to be replaced at the end of their estimated life or
when their performance deteriorates.
*Life span at each wear part differs with a liquid handled and operating condition.
*Valve assembly and bellows replacement should be conducted by Iwaki.
4. Pump operation after a long period of suspension
Feed air to the supply air ports of the pump (approx. 0.2MPa) and see if air leaks from the outlet before
operation. If it leaks, it's the sign of damaged bellows.
Inspection