supply of refilling of nitrogen gas cylinder , refilling of nitrogen gas cylinder-capacity 50l, 200 bar +/-10%, scope of workk- refilling of nitrogen cylinder as per rdso specification no rdso/2013/cg-06(rev-3) or latest with fire rated valve duly certified by peso. refilled cylinder with valves and pressure gauge will be provided and empty nitrogen cylinder with fire rate valve will be taken back. ( inclusive of to & fro transportation cost of nitrogen cylind er ) for automatic fire detection and supression system of jk exim minimum peso validity 04 years [ wa rranty period: 48 months after the date of delivery ] ]