WHAT IS IT?! Here's an odd valve I was given . . .

[Drroaster]

OK, I admit it, this isn't 'really' Tool Talk, but you guys know everything...
I just got given this valve. It's way cool, but is missing a piece (which is fine, 'cause I'll make it into a table or something www.redirectedmaterials.com)

It's a very mildly magnetic stainless (I guess), but is vaguely yellowish/brass-ish in color.

It weighs a ton! Well, really only 14 pounds...

It has been beaten on on the handle flange (see pics).

It is has three ports and can go A-B or A-B-C, but won't do a shut off.

The ports are about 2" dia.

The threads on the ports are Acme.

It has two markings on the main body (see pics): 3LK57 and -2

W H A T I S I T ? ?

Thanks!

Charles

It is a pre 70’s milk valve after Mid 70’s they changes to the clamp method the valve you have had paper gasket when the threads would get weak. Also used orange solid oil for lubrication