Siemens 284-03079 VALVE ASSY 2W NC 1-1/2", 25CV, LIN, SS TRIM HI TEMP PKG FXF, 8" PNEU ACT W/ POSSiemens 284 03079 Valve assy 2W NC 1 1 2", 25Cv, Lin, SS Trim Hi Temp Pkg FxF, 8" Pneu Act w pos Flowrite 599 Series Valve Assembly features a high temperature 8 inch pneumatic actuator with factory mounted positioner and 10 psi span. The 2 way, normally closed, 1 1 2 inch, 25 Cv valve assembly is ANSI Class 250 and has a linear characteristic, stainless steel trim, high temp packing, and female x female end connections. Additional Information Valve