MODEL "521" GLOBE-STYLE,TOTAL TFE CONTROL VALVE 1/2" SIZE, 304 SST SHELL, TFE STRAIGHT BODY; 150 # RF FLANGES, TFE BELLOWS & PACKING, INTEGRAL SEAT, TFE PLUG, OPT - "D" HASTELLOY C-276 STEM, ANTI-ROTATION STOP & PIN; .10 Cv REDUCED TRIM - .250" ORIFICE; EQUAL % INHERENT CHARACTERISTIC; MODEL C27 ACTUATOR, REVERSE ACTION, ATO-FC, 3-17 PSIG BENCH SET; I/P INTRINSICALLY SAFE POSITIONER MODEL D3 I, DIRECT ACTING, 4-20 MA DIGITAL WITH AIRSET AND MOUNTING BRACKET SST TUBING AND FITTINGS; GAUGE BLOCK; NO HANDWHEEL ASSEMBLY; STANDARD COMMERCIAL CLEANING & PAINTING;