Custom made Low Loss Header advice

[Pipedreamer]

Hi Gents.

Looking for a bit if advice regarding low loss headers.
I have fitted a few with my old employer where he would get them made up custom.

However im now out on my iwn and want one made up however im unsure of whats best practice for the primary circuit connectioms on the header itself.

He used to have the flow at the top and the return at the bottom on one side of the header with all the secondary flows and returns on the other side

Os it better to have the primaries like that or have them centred between the secondsry flow and secondary returns?

Ibe added a god awful drawing for a example. One example is in blue the ither in red.

Also an e gineer has recently told me that hes heard multiple outlet headers have problems but cant rwmember what and i cant remember any issues. Anyone shed any light on this?

 

[Pipedreamer]

When i get time to sit down and practice these and try and work mine put can i pm you my workings see if im Damning it up or not?.

Now confused if im working out the 28mm flow rate or load and how.

Also where did you find the figure for 15mm pipe so i can source figures for 22 and 28mm?

 

[ShaunCorbs]

When i get time to sit down and practice these and try and work mine put can i pm you my workings see if im Damning it up or not?.

Now confused if im working out the 28mm flow rate or load and how.

Also where did you find the figure for 15mm pipe so i can source figures for 22 and 28mm?

its in the gas igem up 1

should be listed below if it works

header size use total kw eg calc in post 23

pipe sizing use post 10

 

[Pipedreamer]

its in the gas igem up 1

should be listed below if it works

Thank you.

Before i try and work this out. Im still unsure of the diffetence between working out the flow rate of the 28mm and working out the load of the 28mm.

What factors mean there is more load? Or is it literally how many rads are off each zone?

 

[ShaunCorbs]

Thank you.

Before i try and work this out. Im still unsure of the diffetence between working out the flow rate of the 28mm and working out the load of the 28mm.

What factors mean there is more load? Or is it literally how many rads are off each zone?

sorry prob confused you a bit with estimated load vs actual load

(forward thinking if you slightly oversize you always have some spare capacity if the customer wants to add some more rads later on off a branch / zone)

for header size you want need to size each zone just the total heat load on the header

 

[Pipedreamer]

sorry prob confused you a bit with estimated load vs actual load

(forward thinking if you slightly oversize you always have some spare capicty if the customer wants to add some more rads later on off a branch / zone)

Haha im definitelt confused but its me not you lol.

If i try and work this oit can i send you a photo and you tell me if im barking up wrong tree or getting it in ball park?

 

[ShaunCorbs]

Haha im definitelt confused but its me not you lol.

If i try and work this oit can i send you a photo and you tell me if im barking up wrong tree or getting it in ball park?

yep im busy atm so allow a couple of days if i dont respond just give me another pm

 

[Pipedreamer]

yep im busy atm so allow a couple of days if i dont respond just give me another pm

Bust? Whats that when its at home?
[automerge]1574806816[/automerge]
Ahh ypu mean busy. Ive got a cheek not realoaing that when im the king of typos

Thanks for your help

 

[king of pipes]

Heres one I did 8 years ago now just serviced it recently header is 65mm x 1500 long with 3 22mm circuits has performed well . Kop