Stop cocks and gate valves

biffvernon · 13 Aug 2006

What's the difference between a stop cock and a gate valve and when do you use which?

grrinc · 13 Aug 2006

Gate valves for tank fed. They are full bore and allow more flow but are more likely to let by a bit after a few years.

Stop cocks for mains pressure. Slightly restrictive but a superior seal.

Alfredo · 13 Aug 2006

When they get old gate valves break or fall to bits in your hands..even dezincified ones..you don't want that on a stop cock..which are usually better quality.

Had some fun with gate valves

Alfredo

corgiman · 13 Aug 2006

also a gate valve will let by mains water

gas engin · 14 Aug 2006

great fun when you shut a gate valve on a cold feed from a tank and it doesnt open back up again

biffvernon · 14 Aug 2006

Thanks. My job evidently needs a stop cock.

corgiman · 14 Aug 2006

gas engin said:
great fun when you shut a gate valve on a cold feed from a tank and it doesnt open back up again

yep that always makes me chuckle, especially at 1730 on a friday night, oh how i laugh

Agile · 14 Aug 2006

Nobody has really stated the main difference.

Gate valves are for low pressure systems primarily for isolation purposes for maintenance. They can also be used for flow balancing.

Stop cocks are for high pressure water supply often up to 10 Bar. They can be used for emergency isolation or even used in a normally off application.

Tony

longdogs · 15 Aug 2006

forget gate valves and stopcocks.....use isolation valves ( ballafix valves) for everything!

corgiman · 15 Aug 2006

yep they are great especially if that aint be used for ages and pee out when you really need to isolate something

If you do get good quality ones like pegler etc

Agile · 15 Aug 2006

Corgibod, you forgot to mention that their bore is only about 30% of the area of a gate valve!

corgiman · 15 Aug 2006

blimey agilebod do u still use those???

I was refering to the full bore peglers

like the gas but for water,marvellous things

Agile · 15 Aug 2006

Not me!

Its this "Squeeky" person who seems to want to use inadequate parts to do a cowboy job!

Its not surprising that he does not want to identify himself!

He probably uses a PAYG mobile number and only does jobs for "cash".

Tony

corgiman · 16 Aug 2006

Wow tony

you have a one war against mobliys at the mo

and yellow pages

still I love the full bore balofix, nice piece of kit and the auld folks have no hassle using them, much better than gate valves of stopcocks.

Hold have to go me mobile is ringing and think its yellow pages about me advert, have to be kwik as I am running out of credit

biffvernon · 16 Aug 2006

Ah - life's never simple. I ask for the difference between two things and learn that I need comething else! Can you point to a 'full bore balofix' on scewfix or somewhere, please?

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Stop cocks and gate valves

longdogs

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