Injector steam out

[jlakes85]

Hi all,

The feedwater lines on my shay are 1/4 not. The injectors I'm using are for 5/16 od tubing. I got 5/16 to 1/4 steam rated compression fitting adapters from McMaster. Is there any issue with the feedwater output going from the smaller 5/16 tubing to the 1/4 pipe?

Thanks,

Jlakes85

[Asteamhead]

Hello jlakes85,

No issues. Please avoid any sharp edges.

Asteamhead

[cbrew]

no issues, it would be no different then throttling the water done with ha valve, suction lines just need to be bubble tight

[Fred_V]

I have found that 1/4" works but 5/16 will allow a higher feed rate. Your choice.

[piedmontg]

If possible keep the feed water input at the higher value. If you can do the steam input at the 5/16 that would be better also.

Bob

[FLSTEAM]

Just for the record Brass 5/16 tube has an ID of .285 and 1/4" sch 40 pipe ID is .364
Injectors work best with the path of least resistance i.e. no curves or restrictions.
The inlet should also have a path with no restrictions and no air leaks.

John B.

[Fred_V]

I miss read the original post. I was thinking tubing all along.

[blff cty lcmtv wrks]

if you are using copper tubing with actual 1/4" and 5/16"o.d., there is a cheap way to join 1/4" copper tube to 5/16". take a quarter inch reamer and introduce it into the larger tubing. ream for an inch or so. the smaller tubing should slide into the bigger tubing. you may have to sand a bit on the smaller tubing. when it slips together, you can then flux the joint and silver solder it together. would not recommend the use of lead or tin solder.

bigc
bluff city locomotive works