Guys,

We are doing th VA soon but there are some equipment are offline. I hate to start them for 5 minutes for the VA guy to do his survey as the result would not be real. What is your recommendation?

Cheers

Brighton - personally I'd wait until on line again. You need repeatable data for trending and unless all your parameters eg. speed, flow, pressure etc are similar your data trending won't be as good.

Mike.

WHy some equipment are offline, not required by production or on standby mode?

Standby equipment usually is ofline when needed , there are some discussions about operating protocols in the forum, where the 50:50, 75:25, the 100:0 rules are extensively debated.

If its spared equipment then wait until next rotation.
We have 2 HP plunger pumps that we rotate once seals have gone.
I find it easier to just do VA when each pump in operation - it means you might have big gaps in time line eg: seals last about 9 months - however its a trade off. You can's always get what you want - sometimes you need to keep on productions nice side.

Mike.

Do you test run your standby unit periodically?

This message has been edited. Last edited by: Josh,

Test run is a very difficult subject, depending on the amount of paranoia in the plant, someone will propose a testrun every day.

Testruns are either too short (duration) and too frequent if there are no logics involved. We all know that the magitude of equipment wear is the highest in the startup phase.
But people who at home do not test the lights in an unoccupied room (just by flipping the switch), and they know it will shorten the life of the bulb, will demand to start a firewater pump everyday to verify if it is still there (available)

I think the test run requirements seem subjective but if follow a relevant standard and OEM user manual, it's quite straight forward.

What about a regular change over?
As we all know,
a stand by equipment is no longer accepted as an equipment which we are not going to run unless there is a problem with the main equipment.
Also there may be so many deffects depending on the duration of stoppage of the equipment.
May be you should meet production people to provide a regular change over program.
Then you can set the scheduled data collection considering the frequency of data collection for each and individual equipment.
This will definitly reduce the the problem and will increase the values of all KPI,s.

Hi Sir
I Want Learn about dynamic balancing.