... valves NameModelFunction codeFunctionsspecificationShapeDiacharge fume valvePYF-1SDDC24V turned on,manual open,hand reset,out put opening signal≥200*200rectanglePYF-3SD≥Φ ... fume valvePYF-4BSDDC24V turned on,long distanced manual open,hand reset,out put opening signal≥320*320rectanglePYF-8BSD≥Φ ... smoke vent PYK-2 ISDDC24V turned on,manual open,hand reset,out put opening signal≥250*250rectanglePYK-2 ...