|duncan webster||14/06/2021 18:32:27|
|3444 forum posts|
Consider it my way round. The diameter of port 1 scales at half the outside diameter of the Oring, so the areas are 4:1. The area exposed to cylinder pressure is 3/4 of that exposed to boiler steam pressure, and so if cylinder pressure is 1.333 * boiler pressure the valve will open. The other way round you need cyl pressure = 4* boiler pressure to open it.
As Fizzy says, both work. The drawing implies port 1 is exhaust as there is no thread to secure it.
|554 forum posts|
Totally agree with Duncan
Please login to post a reply.
Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!
You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.
Click THIS LINK for full contact details.
For subscription issues please see THIS LINK.