ADI R-Series single heated head diaphragm sampling pump is a general purpose motor that can be used in almost any application. The sampling pump is constructed of 316 ss wetted parts and a 3 ply PTFE ® diaphragm. The Heated head ADI Pump with PTFE ® diaphragm is used in Clean Air’s Heated In-Line Filter Pump Assembly. The PTFE ® diaphragm allows the pump’s diaphragm to have a longer lifetime than the PTFE ® / EPDM diaphragm. For proper pump performance, 3 sheets of PTFE ® material are required to make up one replacement diaphragm.