supply of (1) flash back arrestor (dry type) for torch (2) flash back arrestor(dry type) for regula , flash back arrestor(dry type) for regulator end of acetylene/lpg lines to prev ent flash backs in oxy fuel system conforming to en 730/iso 5175-1/is 11006 standards with f lame arrestor(fa) and non return valve(nrv) and thermal cut off valve(tv) working pressu re: 1.5 bar for acetylene/5.0 bar for lpg. end connections g 3/8 lh to en 560/iso 3253 standa rds. make: messer(dgn fuel) or esab(protex ra) or gce(fr-34 r fuel) or weld star or seema o nly. note:1) offers of oems or their authorised dealers enclosing valid authorised dealers hip certificate only will be considered. 2) the suppliers shall send test certificate from go vt. authorised test house. in case of international brand, the test certificate from reputed institute like bam, germany is mandatory. 3) the suppliers should have equipments for testin g of flash back arrestors and calibration. the purchaser has the right to inspect these in stallations. as per specn. en 730/iso 5175-1/is 11006 . [ warranty period: 30 months after the date o f delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ] , flash back arrestor (dry type) for torch end of acetylene/lpg lines to prevent flash backs in oxy fuel system conforming to en 730/iso 5175-1/is 11006 standards with flam e arrestor (fa) and non return valve(nrv) working pressure: 1.5 bar for acetylene/5.0 bar f or lpg. end connections g 3/8 lh to en 560/iso 3253 standards. make: messer (cg-91 fuel) or e sab(fr-18) or gce(fr-20t fuel) or weld star or seema only. note:1) offers of oems or their au thorised dealers enclosing valid authorised dealership certificate only will be considere d. 2) the suppliers shall send test certificate from govt. authorised test house. in case of i nternational brand, the test certificate from reputed institute like bam, germany is mandat ory. 3) the suppliers should have equipments for testing of flash back arrestors and calibration. the purchaser has the right to inspect these installations. as per specn. en730/i so 5175-1/is 11006 [ warranty period: 12 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]