Swagelok SS-4P4T — quarter-turn instrument plug valve with a 316 stainless steel body and 1/4 in. Swagelok tube fitting end connections, flow coefficient Cv 1.6. Quarter-turn on/off. Part of the Swagelok instrumentation valve program for gas and liquid service on instrument, sample and small-bore tubing lines. Maximum working pressure and temperature ratings are governed by the valve series, seat/packing material and mounting per Swagelok catalog documentation; select and install against the applicable Swagelok data sheet.