View Single Post
  #15   Report Post  
Posted to uk.d-i-y
John Rumm John Rumm is offline
external usenet poster
 
Posts: 25,191
Default Expansion vessel. Rookie mistake

On 10/04/2021 14:23, Mathew Newton wrote:
On Wednesday, 7 April 2021 at 23:37:35 UTC+1, John Rumm wrote: .
Now check the pressure at the shrader valve. If it's less than
(typically) 3 bar, add air until it's at 3 bar.


For what it's worth I note that the instructions for my vessel say to
pump it up to 0.2 bar less than the static pressure. I've always
assumed it is to give a slight positive bias in the direction of
intended travel so as to minimise stresses when it returns to the
at-rest position.


It depends a bit on what the PRV on the inlet is set to (and the water
pressure if its less than the PRV setting)

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/