supply of preset air filter and regulator.preset air filter and regulator.,set of items for preventing water ingress from epfss to air brake pipeline in lhb coaches1) n rv- 1/4 as per mcf specification mmdts 19027, rev.1; qty: 01 nos per set.2) hex nipple- 1/4 as per mcf specification mmdts 19027, rev.1; qty: 01 nos per set.3) 1/4 mini ball valve as per mcf specification mm dts 19027, rev.1; qty: 01 nos per set. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ] , preset air filter and regulator 1/4 at 3 bar pressure with bracket andfastener s designed for pressurised flushing system, as per mdts 19027. rev.01.functionally compatib le in pressurised flushing system of indian railway coaches fitted with pressurized flushin g system make: mmhp/spac or similar. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ] => limited