There are also designs that incorporate a hose skimmer system into the tank. I have seen several installations at GE Aircraft in Cincinnati, OH. They were manufactured by Mesa Rubber in Cin.
We always use BTE (Baillie Tank Equipment) swing joints for all our suction lines. They manufacture central type swing joints for aviation use from 3" to 30" diameter. See
I believe that BTE uses HMT equipment pretty much exclusively. Their seals and swivels are identical. Their swingjoints, in my opinion, are not as sturdy and proven as the Huber Statite design which has been around a lot longer.
which kind of informations are you looking for??
Their main advantages are that it is symetrical and that it uses a spring to compensate for the gear wear area, and keep a very good sealing. We've been using LARCO's FSU for 25 years without having ever change any spare part