Drain Valve / Air Valve is used for window air conditioners, to enable the draining of condensing water. Working temperature: 0-24degree Environment temperature: -10-+60degree Rigidity of bellow: 325?5g/mm Discharge valve is mainly applied to household air-conditioner , It can discharge the pressure to protect system automatically while the outside temperature goes too high. Refrigerant: R22, R407C, R410a, R134a environment: -30-+80degree max working pressure: 3.0Mpa(R22), 3.3Mpa(R407C), 4.2Mpa(R410a) pressure range: 2.0-3.3Mpa; different pressure of on-off: less than 0.3 Mpa leakage: less than 600ml/Min diameter dimension: 6.35mm