3100 Series Rev C Pressure/Vacuum Relief Vent End-Of-Line; Mates With ASME 150 Flange Connection; 4" Flange Size; 316 Stainless Steel Body, 316 Stainless Steel Seat Ring; FEP Pallet Diaphragm; 8.00 - MAX Oz/In2 Pressure Pallet Configuration; MIN - 0.49 Oz/In2 Vacuum Pallet Configuration; Stainless Steel Weight Material; Standard Vacuum Protection Screen; Standard Cleaning Method; With Special 316 SST Vacuum Protection Screen, Loading Weights, Lift Brackets, Nameplate, Vacuum Screen Flange and all External Hardware; All External Bolting require Xylan 1424 Coating (40 microns); Special Painting Per #S-1819 Three-Coat Painting