ethylene glycol swivel fitting

[vbk]

Hi,

I'm looking to design a piping system for about 4 coolant lines (3" dia each) carrying ethylene glycol to a shelter resting on an Azimuth turntable. Because the turntable will need less than 3/4 of a rotation, I want to stack 4 swivel fittings over the center of rotation. The expected Pressure requirement is ~200 psi. I was thinking a hydraulic-type fitting might be a source. Any idea where I might find this type of fitting? I prefer to avoid wrapping flexible hose. This is outdoor & must fit thru a 48" dia hole. Does this sound like a commmom application?

Thanks

 

[btrueblood]

Deublin is the brand name company you want to talk to or at least look at:

http://www.deublin.com/

You can find products similar to theirs on McMaster Carr's website, mcmaster.com. They have some (although only rated for air, not water/glycol) with 4 independent connections in one union.

Two cautions: 1. get epdm seals if at all possible, and plan for leakage. 2. Your application is one of reciprocating motion - try and get a union design that has all fitting threads aligned perpendicular to the axis of rotation, so that the fitting threads won't back off over time.

 

[vbk]

Thanks btrueblood, I'll check out the site & seek their guidance. I see McMaster has some but they say they're not intended for a lot of cycles.

 

[unclesyd]

Here is one, Johnson, that we use in water/glycol system that operate 24/7/365. It is nothing to get 10 yrs service before rebuild. I don't know the model number but its for dryers and coolers using water or water/glycol.

http://www.kadantjohnson.com/index.html

 

[ApC2Kp]

vbk,

The size 3" lines would make hoses fairly stiff. There are swivel joints made for tanker and rail car loading arms in that size that would be a good fit for your application.

These vendors also make the fueling hose swivel fittings that you would see at gasoline pumps:

http://www.opw-fc.com

Dover-OPW

http://www.slytone.co.uk

Emco-Wheaton Div Syltone Co

http://www.fmctechnologies.com

FMC Chiksan

Another rotary joint manufacturer in UK,

http://www.rotaflow.com