Phone SPIRAX SARCO Ltd at Cheltenham, England.
or Gestra Ltd, who I think are now part of the Flowserve group at Haywards heath.
They may not manufacture them themselves, but they'll be able to advise.
The other avenues I'd try are : Honeywell Controls or
Samson Control Valves.
Good Luck !
VG
Hi - if you've been asked for a GATE DBB, then its an expanding-type of gate that you need to look at - similar in function to the Parallel Slide Valve, where effectively there are two seperate gates within the assembly.. Have a look at doing a search on Through-Conduit Gate Valves on google...
In the world of triple offset butterfly's - aside from Vanessa as already mentioned, the other "Big Ones" in manufacturing are Tomoe-Tritech ( South Wales in the UK, .. and Headquartered in Japan ), Solent & Pratt, who used to be a nice independent UK company and have now been swallowed up by...
