e-tender ( 4th call ) for supply of medical gases in cylinders to govt. hospitals and health units for the period 2022-24, by dy. director of health services ( e and s ) , central medical stores , zone-a hospitals and bphcs in the districts of darjeeling, kalimpong, aliurduar, coochbehar and jalpaiguri , medical nitrous oxide i.p.-2007 ( d type cylinder ) specification: filling ratio kg / ltr=0.667, water capacity – 47 ltr, volume of gas 17.1 cu metre, minimum weight of gas at supply 31 kg. , zone-d hospitals and bphcs in the districts purulia, bankura, bisnupur h.d., jhargram and paschim bardhaman , medical oxygen ip. 2010 ( a type cylinder ) specification: max working pressure 150 kgf / cm2 ( bar ) at 15ºc, water capacity 5ltr, volume of gas 0.71 cu. metre, minimum pressure at supply 140 kgf / cm2, at ambient conditions , medical nitrous oxide i.p.-2007 ( a type cylinder ) specification: filling ratio kg / ltr =0.667, water capacity 5 ltr, volume of gas 1.74 cu metre, minimum weight of gas at supply 3.3 kg , medical nitrous oxide i.p.-2007 ( d type cylinder ) specification: filling ratio kg / ltr=0.667, water capacity – 47 ltr, volume of gas 17.1 cu metre, minimum weight of gas at supply 31 kg. , carbon di-oxide specification: max working pressure 150 ( kgf / cm2 ) ( bar ) at 15ºc, minimum pressure at supply 124 kgf / cm2, at ambient conditions. , zone-f hospitals and bphcs in the districts of n 24 parganas, basirhat h.d., s 24 parganas, diamond harbour h.d. and kolkata , medical nitrous oxide i.p.-2007 ( d type cylinder ) specification: filling ratio kg / ltr=0.667, water capacity – 47 ltr, volume of gas 17.1 cu metre, minimum weight of gas at supply 31 kg.