How Tight Do I Install Conical/Tapered Thread Valves?

Yankee Rebel

exactly what the title says...

ive got some conical thread cylinders that i need to put valves in, and i dont want to overly tighten them or underly tighten them and screw something up. for one.. i cant afford to replace them, as they cost me enough to get them in the first place.

im very familiar with spinning in o-ring sealed valves.. just run them in all the way by hand, and bump them with your palms to seal/seat them and they are good. but tapered/conical threads....

any advice appreciated..
Yankee Rebel

decoweenie

Personally, I install my conical valves pretty tight since I figure it is metal-to-metal seal, and not o-ring seal.

I use a DIN-bar in the valve, roll the tank on the floor in the correct rotation and smack the bar on the floor a couple of time. I guess it is the equivalent of tapping the bar with a hammer, but easier.

When it is time to un-install the valve, same procedure except roll the tank the opposite direction.

gerstl_ossi

The small conical thread cylinders-valves (DIN/EN 144-1 19,8) with teflon seal - 100NM on steel tanks and 60Nm on alu tanks.

friendly Oswald

Yankee Rebel

so about 73 ft lbs.

thanks guys.. ill toss them in about that and give it a go.

now to go pad the jaws on a pipe wrench and use my tie downs to secure the cylinders to the table.
id do Daves trick with the truck.. but its not moving right now..

Yankee Rebel