Model Boat Mayhem

The Shipyard ( Dry Dock ): Builds & Questions => Steam => Topic started by: KBIO on December 30, 2020, 03:47:45 pm

Title: 4 ways valve.
Post by: KBIO on December 30, 2020, 03:47:45 pm

Hello!
I am looking for a drawing to machine down a 4 ways valve for my new engine. .
If you have something simple and reliable, I would greatly appreciate.
Thanks a lot and have a good New Year!
Regards.

Title: Re: 4 ways valve.
Post by: SteamboatPhil on December 30, 2020, 06:45:44 pm

What does it have to do ?

Title: Re: 4 ways valve.
Post by: KBIO on December 31, 2020, 08:08:30 am

Good morning Phil!
It has to distribute the steam towards the engine.
In the worst case, I'll buy one.
Thanks for your help.
Have a good healthy night!
Yves/

Title: Re: 4 ways valve.
Post by: derekwarner on December 31, 2020, 08:43:12 am

Hullo KBIO....


This image appears similar to a high pressure 3-way oil hydraulic ball valve ...3-way ball valves are also marketed for low pressure applications for Water-Oil-Gas [the body has the letters in the casting ....[WOG] to represent and confirm suitabity for application


They rely on a hard chrome plated/ground/polished brass ball, and 4 x preloaded contoured POM seats
The valve body is usually externally nickle plated cast brass body


Sizings of 3-way LP ball valves are available in 1/2", 3/8" and 1/4" BSP are common and for less than $US15.00..........and from your Local Plumbing or Hardware store


I have seen an American manufactured product down to 10#32 tapered thread port size [about 3mm thread]  however they were some $US320.00 each ....these were designed for Instrument applications with inert gases and liquid nitrogen etc in mind


Sometimes, a T Tube union & and additional tube needle or globe valve to dump the pressure could be a cheap alternative, or if a simple application.... a boiler water gauge blowdown valve?


Best wishes for 2021...........Derek

Title: Re: 4 ways valve.
Post by: Jerry C on December 31, 2020, 09:04:05 am

That looks exactly the same as used by the “ Bogstandard” engine. It’s a regulator and reversing valve all in one.
     Can’t find the link but it’s on Paddleducks website.
Jerry C.

Title: Re: 4 ways valve.
Post by: derekwarner on December 31, 2020, 10:18:51 am

Sorry...


I stand corrected...I used a description of functionality being a 3-way valve.......
Technically the valve KIBO shows is an X ported valve,


Derek

Title: Re: 4 ways valve.
Post by: Geoff on January 14, 2021, 11:41:28 am

This is the same as Peter Arnot used on his steam engine designs. The central spindle has two flats machined on it on opposite sides so depending on the degree of rotation 90 degrees max it directs steam to either port and the un-machined parts stop the steam flow.


Cheers


Geoff