Can you provide a link to the heat exchanger you guys use? i didn't see one on pharmagold
also do you guys have any clients using the hawg with a px1?
Pharmgold has their heat exchangers custom wound and then finished in their shop. I discussed it with them and Catherine at sales@pharmgold.com can quote it you as a stand alone accessory. You would have to build your own mounting.
As designed, it would typically include the counter flow exchanger with a Swagelok tee on the butane discharge tube, containing a Type J thermocouple. All connections are 1/2" JIC. The thermocouple would have a short whip, with mini thermo jack plug.
Pharmgold does have a customer running a PX1, who I expect to visit today, to review how we might upgrade his system to take advantage of more of the Hawg's capabilities. It could easily run multiple units.
Larger plumbing, with bigger heat exchangers and chillers are of course easy upgrades, but the PX1 is still limited in collection pot surface area to boil from, so must rely on more heat for speed.
I will ask if they are open to discussing details with potential competitors.