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Purification unit
6. Stainless steel needle valve(toggle valve not acceptable)
7. Inlet connection will be SS ¼” swg. And outlet connections SS316 1/8: swg.
8. By-pass loop system for each gas line to be provided separately (Each gas line consisting
of 3 nos. of SS 316 needle valve and 1 no. of non-return valve).
9. Working pressure = 15 Kg/cm2
a. For N2O, H2, N2 and Ar
i) Regenerable moisture trap with molecular sieve 13 X ( make : Supelco/Altech) + Color
indicating blue gel (make Supelco/Altech), imported poy-acrylic MOC, 250 cc volume,
250 mm length, end fitting SS 316.
Impurity removal specification : If the incoming moisture concentration is 10 ppm then
the moisture concentration in the outlet should be reduced to less than 0.5 ppm.
Regeneration process : By passing air at 600C continuously for four hours. The bidder
should mention the flow rate.
ii) Regenerable hydrocarbon trap with activated charcoal ( Make : Supelco/Altech)
imported poy-acrylic MOC, 200 cc volume, 250 mm length, end fitting SS 316.
Impurity removal specification: It removes organic compounds from feed gas streams
to the extent that if the normal compresses air contains 600 ppm hydrocarbons,
concentration in the outlet air should be less than 10 pp,.
Regeneration process : : By passing hydrogen at 600C continuously for six hours. The
bidder should mention the flow rate.
(iii) Regenerable oxygen trap with 0.5% palladium on carbon crystals. Make OXICLEAR (
Model PEC 100 CC SH), Type : Regenerable, Capacity 100 cc length : 215 mm, MOC :
ss316, Filling material : 0.5% palladium, make BDH (USA), end fitting SS316.
Impurity removal specification : If the incoming gas contains 10 ppm oxygen, the
oxygen concentration at the output should be less than 0.1 ppm. The capacity of the
trap should be such that it should have a life of 18 months when subjected to a
continuous stream of 40 ml/min gas containing 10 ppm of oxygen.