I don't think so, its the same general diaphram style though, the version is here:
http://www.demaeng.com/product.php?id=107&catid=8
Max operating pressure 150 psi, 1 psi opening. I'm guessing I need a fair bit more pressure to open it. For what its worth it has a flow factor of CV= 5.0
Installation instructions here:
http://www.demaeng.com/getFile.php?id=174&type=document
Also, the FX5 filter has a capability of 10.8 ft, so I gather that means the max pressure output is 10.8 * .433 = 4.7 psi