Cylinder drain cocks

[fcheslop]

Does anyone have a drawing they could share for cylinder drain cocks
Im looking for a design around 5/32 x 40 tpi sized to use as a speed regulating valve on a 2inch bore Ericsson pumping engine.
Many thanks
frazer

 

[fcheslop]

Ah well guess not
Just have to go my own way
cheers

 

[Brian Rupnow]

Frazer--I made this valve as a speed control on my dual engine donkey winch, and it worked very well for me. If you want, send me your real email address to [email protected] and I will send you the detail drawings.---Brian

 

[fcheslop]

Many thanks Brian
Its the old style taper cock valve Im looking for. I have a few old loco books that show the valve bodies details but nothing on the actual tapered valve.
Its the taper angle Im not sure about not a great problem and I will probably go for around 4 degrees and make several spindles and a D bit at the same setting so they should match up
Its going onto a Ericsson hot air pumping engine as a controlled air leak to control speed
cheers

 

[Charles Lamont]

'The Design of Valves & Fittings", a book from the 1950's, says plug cocks are invariably 10° included.

 

[fcheslop]

Many thanks 10 degrees it is
cheers