Wed Nov 20, 2013 10:21 pm
The Royal is 70-72 model, the DA is 65-69.
Unless someone has gone through them in the last few years with parts from VDH, I can pretty much assure you the internal rubber parts are getting stiff and need replacing. Those parts were originally rubber and get stiff with time, odds are they are original parts which makes them 40+ years old. There has been a lot of improvement in those parts in the last few years, esp the diaphragm. They may be serviceable but unless you just want to keep it original, at a minimum you will want to upgrade alll the internal rubber parts and replace the HP seat. It will make a big improvement in the performance of the reg. Then there are upgrades you may want to consider like the HPR (new designed second stage)and the Phoenix nozzle. If you don't want to go the Phoenix route, then you will likely want at least one of the regs to have a long yoke (they may have them already, can't tell from the photos) so you can use a banjo with them. A banjo allows you to put a SPG between the tank and reg.
Herman
