Ronnie Sullivan
Member
You know that feeling when you realise that you don't know anything about what you are being asked to do...... That's me at the moment.
I have been asked to renew a very old and antiquated control panel for a air/fume/smoke extractor system.
This is how it basically works: A 37KW fan motor pulls air/fumes/smoke from above a molten zinc galvanising bath, through a filtration system and outside into the fresh air.
I assume, as the pressure gauges don't work that when the pressure gets to a certain point (indicating the filters are getting blocked) - a shake down of the filters occurs, dropping all that is caught in them to fall into bags below.
At present, there are 2, 6mm air pipes that are connected to a specially made pressure unit and 2 air pressure gauges. (none of them work) so the operatives run the shakedown manually when they notice that the fumes are not being extracted properly.
As you can imagine - these fumes are pretty toxic and operatives are lazy and don't clean it until everyone is choking.
The ducting for the fumes is about 1M wide (circular) and the air pressure detecting pipes go - one before the filters and one after.
I want to replace these with air pressure transducers (4-20ma or 0-10V)
But I have no idea what pressures or even vacuum will be in these pipes.
As they are expensive, I don't want to get the wrong ones.
Has anyone any experience with this type of system and can tell me what type of transducer - or what pressures I am likely to get?
I have been asked to renew a very old and antiquated control panel for a air/fume/smoke extractor system.
This is how it basically works: A 37KW fan motor pulls air/fumes/smoke from above a molten zinc galvanising bath, through a filtration system and outside into the fresh air.
I assume, as the pressure gauges don't work that when the pressure gets to a certain point (indicating the filters are getting blocked) - a shake down of the filters occurs, dropping all that is caught in them to fall into bags below.
At present, there are 2, 6mm air pipes that are connected to a specially made pressure unit and 2 air pressure gauges. (none of them work) so the operatives run the shakedown manually when they notice that the fumes are not being extracted properly.
As you can imagine - these fumes are pretty toxic and operatives are lazy and don't clean it until everyone is choking.
The ducting for the fumes is about 1M wide (circular) and the air pressure detecting pipes go - one before the filters and one after.
I want to replace these with air pressure transducers (4-20ma or 0-10V)
But I have no idea what pressures or even vacuum will be in these pipes.
As they are expensive, I don't want to get the wrong ones.
Has anyone any experience with this type of system and can tell me what type of transducer - or what pressures I am likely to get?