supply of air filter for ptpp , parichha , air filter , size 610x610x50 mm , type: box type , filter material : synthetic non woven , filter frame material :gi20swg , no . of plate:17 nos . , velocity across filter face in m/sec :1 . 25 m/sec ( max ) , flow rate through filter:1545 m3 /hr , pressure drop ( clean ) :5 . 0mmwg , pressure drop ( dirty ) : 7 . 5mmwg , scaling:4 mm thickness , rubber gasket on both side , efficiency:90%down to 10 micron as per bs:2831 , spacers/stiffners :3 nos . , testing as per ashrae 52 . 76 &bs2831 :flow rate vs pressure drop & efficiency , air filter , size 610x305x50 mm , type: box type , filter material : synthetic non woven , filter frame material :gi20swg , no . of plate:17 nos . , velocity across filter face in m/sec :1 . 25 m/sec ( max ) , flow rate through filter:740 m3 /hr , pressure drop ( clean ) : 5 . 0 mmwg , pressure drop ( dirty ) : 7 . 5 mmwg , scaling:4 mm thickness rubber gasket on both side , efficiency:90%down to 10 micron as per bs:2831 , spacers/ stiffners : 3 nos . , testing as per ashrae 52 . 76 &bs2831 :flow rate vs pressure drop & efficiency , air filter , size 610x610x300 mm , type: box type , filter material : synthetic non woven , filter frame material :ai16swg , no . of plate:09 nos . , velocity across filter face in m/sec :2 . 25 m/sec , flow rate through filter:2780 m3 /hr , pressure drop ( clean ) : 6 . 5 mmwg , pressure drop ( dirty ) : 18 . 0 mmwg , scaling:4 mm thickness rubber gasket on both side , efficiency:90%down to 5 micron as per bs:2831 , spacers/ stiffners : 3 nos . , testing as per ashrae 52 . 76 &bs2831 :flow rate vs pressure drop & efficiency , air filter , size 780x605x6 mm , air filter , size 600x390x35mm