Repressurising expansion chamber


Postby steveglos » Mon Feb 25, 2008 10:34 am

I need to repressurise the expansion chamber on my sealed system as it has lost pressure though a faulty valve. Do I need to drain the system or can I pressurise it whilst it is still full? Thanks.
steveglos
Rank: Labourer
Progress to next rank:
25%
Posts: 2
Joined: Mon Feb 25, 2008 10:30 am

Sponsor

Simply Build It

Postby Oliver_murphy » Mon Feb 25, 2008 2:07 pm

The expansion vessel can be charged with a full system, although I dont recommend it.

Drain the system, and hold open the PRV. When its all open, a standard Schrader valve (I thinks thats spelt right, if not, a standard Bike Pump Valve) pump it up to around 1 bar of pressure. You should dip the needle on the valve first though, see if any water comes out. If you get water, you have a split diaphram, and the entire vessel needs changing.

Hope this helps.
Oliver_murphy
Rank: Tradesman
Progress to next rank:
53.8%
Posts: 38
Joined: Sun Feb 24, 2008 7:27 pm

Postby steveglos » Mon Feb 25, 2008 4:06 pm

Thanks Oliver, would letting the pressure out of the system be good enough? I don't want to drain it if I don't have to as it takes ages to get all the air out and I'll have to get more additive! Thanks.
steveglos
Rank: Labourer
Progress to next rank:
25%
Posts: 2
Joined: Mon Feb 25, 2008 10:30 am

Postby Oliver_murphy » Mon Feb 25, 2008 4:35 pm

If you leave the system with water in it, when you try to re-pressurise the vessel, you will be trying to force 1-3 bar of water out of the vessel. It is better to drain it down, leave an open point (the PRV) and the re-pressurise. THis will force all the water out of the vessel easily, and put less stress on your pump, and wrist!!!!

If I do this for a customer, this is exactly the procedure I follow. Tried and tested,
Oliver_murphy
Rank: Tradesman
Progress to next rank:
53.8%
Posts: 38
Joined: Sun Feb 24, 2008 7:27 pm

Display posts from previous
Sort by
Order by



  • DIY How to Project Guides

  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!



 


  • Related Topics