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