Thanks Montemayor for your valuable feedback.
I am attaching a picture of the existing butterfly valve when it was in the shop. The Mean Time Between Repair MTBR is about 18 months, after that we will notice a significant passing which will affect the PSA process which is in our case nitrogen...
Sorry for not putting enough information.
It is for PSA process of dry nitrogen generation which is switching over every 5 minutes.
The fluid is air and at 7.5 bars (110 psi) and temperature is around 110 F.
The existing valves are butterfly with hard seat and thick O ring.
Regards,
Hello all:
In PSA process that is used for many applications, valves failure are one of the major common problmes, therefore we have to be sure to make frequent maintenance for them.
My question is what is the most reliable type of valves for these application especially non hazardous like...
Thanks for all reply.
In fact we have a place underneath the suction vessel to install a pump. I am thinking to have canned motor pump with external cold flushing so we can fully protect the vacuum system. The service is clean whcih is BFW quality. Any comment on this?
Hello:
I have a problem in a small steam power generation unit where I have a vertical shaft pump in a close vessel under vacuum. the pump of course has a mechanical seal. It is pumping condensate water at 80 Deg C. The flow is only 5 m3/hr. It is keep failing in the bushing area and I am...
Self prime pump does not follow API 610. It follows some otehr standard which I beleive construction. Similar to fire pumps follow other rather than API.
One of the major things is for example nozzel load, it is much lower than what is usually specified in API 610. This is an example and there...
We have both packing and mechanical seal for cooling water pumps. Seal is more reliable and headache free. In packing you will always have water coming to the bearing as well as setteling on the pump foundations.
If you have present problem with the seal you are going to have more if you...
