Pegler Belmont rad valves

JohnD · 2 Sep 2009

My old mum has these. You can replace the red sealing rings on the spindles when they start to leak. I took a couple off a while ago when fitting TRVs, and re-ringed them. Yesterday I tried to take some more apart, but could not get the top brass nut off that retains the spindle. I did not have a spanner to fit and adjustables would not do it.

Any tips?

I founds I can take the complete inners out with a spark plug socket, but that didn't help. Though I can now use heat on the inner assembly if that will help (I am replacing the rings which are the only non-brass parts)

Biggles.. · 2 Sep 2009

Belmonts are still available as most schools still spec them. Never been bothered in stripping them down to far just find it easier to change the whole valve.

Always seems false economy to me to spend more time stripping something and remaking rather than changing the whole valve.Alright part cost more but we can swap as quick as rebuild

HarrogateGas · 2 Sep 2009

lcgs said:
Belmonts are still available as most schools still spec them. Never been bothered in stripping them down to far just find it easier to change the whole valve.

Always seems false economy to me to spend more time stripping something and remaking rather than changing the whole valve.Alright part cost more but we can swap as quick as rebuild

Really, Belmonts are great , not draining down, not freezing, no bunging. I reckon you can change the o rings in about 1 minute. i'd like to see you change a rad valve in that time.

JohnD · 2 Sep 2009

lcgs said:
we can swap as quick as rebuild

I've got about 20 to do. They're not cheap and I can spare the time. Have you got 20 not-very-old ones in your scrap bin that I might manage to unscrew?

@ HarrogateGas any tips on undoing them?

Terrywookfit · 2 Sep 2009

Put some heat on them.A sharp tap on the wrench helps (anti-clockwise).

Close valve first.

JohnD · 2 Sep 2009

I have brought some home with me and can put them on the gas stove

or in the oven. What sort of temp will brass take?

Trick will be to get the gland nut off without the whole inner set unscrewing first

Will it make a difference to close the valve?

p.s. lcgs I am not in the business

Terrywookfit · 2 Sep 2009

Melting point of Brass is in excess of 900 celcius.

I was thinking more of A quick localised blast with the blow torch!

If valve is fully open ,The spindle could bind against the gland nut.

twgas · 2 Sep 2009

Get a spanner that fits and turn the valve so it's half open (or shut) so it cannot bind either way.

JohnD · 10 Sep 2009

Done anyone have some old ones to spare? I will gladly pay costs. Some of them have been damaged by previous attempts to remove the spindle nut.

Nige F · 10 Sep 2009

Terrywookfit said:
Melting point of Brass is in excess of 900 celcius.

I was thinking more of A quick localised blast with the blow torch!

If valve is fully open ,The spindle could bind against the gland nut.

Yeah but no but...heat in oven and Thermo shock them by plunging into cold water

Ask Thermo if he got a shock last time he plunged into the sea in Sussex

doitall · 10 Sep 2009

Wrap 3 turns of ptfe around the shaft, and poke it into the stuffing box, and do the gland nut back up.

JohnD · 10 Sep 2009

can't undo the spindle gland nuts. That's what I meant.

doitall · 10 Sep 2009

Are you using a ring spanner.

JohnD · 10 Sep 2009

it's not a metric size, I have been using a socket that fits from my collection. I think it was 3/8" Whit

I was able to crack open and undo some very tight gland nuts, but others have been rounded or burred and I can't get them undone.

I might have some old AF and WW OE or ring spanners in a box at the back of the shed somewhere, but I haven't found them yet.

tamz · 10 Sep 2009

Use a pair of knipex - or similar inferior quality

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Pegler Belmont rad valves

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