Model SLR-2 Pressure Reducing Regulator W/Non-Relieving Loader; Body Size 1", Opt-81 Full Diaphragm Support Construction; Lcc Steel Body & Lcc Steel Loading Chamber; Nace Trim, Ctfe Seat, Nbr Diaphragm;V-Tfe Static Seal, Elg/Tfe U-Cup Dynamic Seal; Npt End Connection; No Lower Spring; Internal Sensing, Standard - Flow To Open Direction; 1/4" Size Npt, Loader, SST Body & Spring Chamber, Non-Relieving,;SST Trim, Tfe Seat, Spring Range 50 - 1250 PSIG; No Filters (Customer To Supply), SST Tubing, SST Fitting; Opt-40: Construction Per Nace Standard Mr0175