The design of two-way liquid tube drier filter can make refrigerant not polluted by using protective circulatory of heating and cooling. The design of JRDK prevents the pollutant from moving backward. JRDK series leave out 2 outer stop valve and 2 routine drier that saves pipeline and relevant expenses. Stop valve makes flow and filtration work in any directions. It can be installed in any place. Safety work pressure: 3. 4Mpa. It can get rid of acid, moisture and solid pollutant.