supply of flash back arrestor (dry type) for torch end of oxygen lines , flash back arrestor (dry type) for torch end of oxygen lines to prevent flash backs in oxy fuel system con forming to en 730/iso 5175-1/is 11006/2011, (ra.-2021), amd.-1 of dec. 2013 standards with flame arrestor (fa) and non retu rn valve (nrv) working pressure: 15 bar. end connections g 3/8 rh to en 560/iso 3253 standards. make: messer (cg-91 oxy ) or esab (fr-18) or gce (fr-20t oxy) or weldstar or witt only. note:1) offers of oems or their authorised dealers enclo sing valid authorised dealership certificate only will be considered. 2) the suppliers shall send test certificate from g ovt. authorised test house. in case of international brand, the test certificate from reputed institute like bam, german y is mandatory. 3) the suppliers should have equipments for testing of flash back arrestors and calibration. the purch aser has the right to inspect these installations.spec:en 730/iso 5175-1/is 11006/2011, (ra.-2021), amd.-1 of dec. 2013 [ warra nty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]