Dear Nopprasit san
I answer the questions as below alleady
1. The pump run well (generate proper discharge & stable pressure, no
cavitation) initially for 10 minutes without any abnormal sound, etc.
(No problem.)
2. Do your engineers hear any rubbing sound from the cold end –
impeller and volute?
(It had not hear from the cold end.)
3. Can they turn the shaft by hand now? Or can turn the motor fan by
hand
(After the pump run 10 minutes the shaft can not turn.)
4. Once we know the cause of the problem – i) bearings? Ii) impeller
with volute?, etc. we will take proper action for it
(The housing of bearing very hot.)
5. How about the other unit of TC21 1x2x6 that purchased earlier? Is it
working well?
(I need transfer LO2 to lorry.(Stock tank NO.2)).
Tank you verry much