XH-5 molecular sieve,XH-7 molecular sieve,XH-9 molecular sieve. XH-5 molecular sieve is used mainly for refrigerant R12 and ... R22 in order to desiccate, purify and improve refrigeration effect.XH-7 molecular sieve is used to dehydration and desiccation for ... refrigerants, which are used in refrigeratory, deepfreeze and air conditioning.XH-9 molecular sieve is a common desiccation for new type ...