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Ball-Valve for a Regulator

Xz

Joined: 1-01-92

Topics: 17

Replies: 244

Posted: Mon 12th Jan 2015, 2:59pm
Ball-Valve for a Regulator

I've heard of many folks using industrial type ball-valves as loco regulators these days. Can anyone quote a manufacturer/supplier and part No for a suitable one, please? The array out there is bewildering and many seem to me to be unsuitable due to material, or temperature range.

Bob G.
 

Replies To This Post

Mick

Joined: 1-01-89

Topics: 7

Replies: 114

Posted: Mon 12th Jan 2015, 4:52pm

Hi Bob, I've had one on ELLA since she was built in 1991. I will use one on the Thomas 2 I am building now. Any decent quality full flow brass ball valve (½" BSP for a Thomas) will do. Typical in the PHC catalogue is type BV92, ½" BSP female x female, temperature range given as -20c - 150c. I've attached Rod Burnley's drawing showing the valve on the loco. Mick.
Hi Bob, I've had one on ELLA since she was built in 1991. I will use one on the Thomas 2 I am building now. Any decent quality full flow brass ball valve (½" BSP for a Thomas) will do. Typical in the PHC catalogue is type BV92, ½" BSP female x female, temperature range given as -20c - 150c. I've attached Rod Burnley's drawing showing the valve on the loco. Mick.
 

Xz

Joined: 1-01-92

Topics: 17

Replies: 244

Posted: Mon 12th Jan 2015, 5:54pm

Hi Mick, thanks for that. I am concerned about the temp as much as anything, steam at 100psi is well into 300C range, so 150 seems ify, but if Ella's is till there after the use she's had all these years then I guess it's probably Ok. I have a stainless steel one to hand, that's rated to 200C.

B.
 

George

Joined: 27-01-10

Topics: 0

Replies: 20

Posted: Mon 12th Jan 2015, 7:22pm

Hi Bob,
Just of the top of my head steam at 9 bar (saturated) is 190C. This is more then 100psi if I'm not mistaken.
What I've heard all around me is the advice to stay away from PTFE (or Teflon) and go for Viton. But I have seen use of regular ball valves with no defects and as they are inexpensive if you feel the need it can be exchanged.
Regards George
 

Xz

Joined: 1-01-92

Topics: 17

Replies: 244

Posted: Mon 12th Jan 2015, 9:29pm

Hi George, thanks, just realised my error, it was 338F not C which then equates back to 170C at 100psi. so within spec. at last!!!

Cheers.
 

George

Joined: 27-01-10

Topics: 0

Replies: 20

Posted: Tue 13th Jan 2015, 3:51pm

Maybe Mick would be kind enough to also share a view of the rods that operate the ball valve. I'm still looking for a design for the Hunslet.
George
 

Mick

Joined: 1-01-89

Topics: 7

Replies: 114

Posted: Tue 13th Jan 2015, 7:08pm

No problem George, look me up in the membership 1426 and get in touch.
 

George

Joined: 27-01-10

Topics: 0

Replies: 20

Posted: Wed 14th Jan 2015, 8:42pm

Hi Mick,
Just tried that. Don't get any contact details. Shall we try the other way round. I'm 4544.
George van der Hauw
 

Xz

Joined: 1-01-92

Topics: 17

Replies: 244

Posted: Thu 15th Jan 2015, 2:52pm

A word to the wise, if you need/want to use live email addresses in open forum like this one, then change the @ sign for (at), or similar, then the spambots cant read them. It maybe that you need to update your details on the site if folks can't find you.
 

roystonthomas

Joined: 1-01-85

Topics: 5

Replies: 16

Posted: Tue 3rd Feb 2015, 2:54pm

Hi All, just picked up on this topic. I used a 1/2 BSP angle ball valve in my Milner Hunslet. I've attached a picture. The backhead arrangement had to be modified a bit and the shaft incorporates a viton O ring seal.
Hi All, just picked up on this topic. I used a 1/2 BSP angle ball valve in my Milner Hunslet. I've attached a picture. The backhead arrangement had to be modified a bit and the shaft incorporates a viton O ring seal.
 

roystonthomas

Joined: 1-01-85

Topics: 5

Replies: 16

Posted: Tue 3rd Feb 2015, 3:11pm

Hi, just looked up the supplier of my valve.
See < www.vip-ltd.co.uk/dynamic/viewitem.php?item=01/0094/015 >.
If you look in "Model Engineering Clearinghouse", there is a thread in the Boiler topic section
< http://modeleng.proboards.com/thread/7746/milner-hunslet-regulator >
with discussion and more pictures. Hope this helps.
 

Xz

Joined: 1-01-92

Topics: 17

Replies: 244

Posted: Tue 3rd Feb 2015, 5:55pm

Cheers Royston, I'm well 'down the road' with this one now. Hadn't come across the right-angled valve though. Might have been a little easier.
 

George

Joined: 27-01-10

Topics: 0

Replies: 20

Posted: Wed 4th Feb 2015, 6:57pm

Hi royston,
Shame the forum is members only. I am quite interested.
Regards George
 

Xz

Joined: 1-01-92

Topics: 17

Replies: 244

Posted: Sat 14th Feb 2015, 8:24pm

If the photo shrinkage worked this is my result.
If the photo shrinkage worked this is my result.
 
 
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