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Although the models are limited, some KK, KKH, and KKA series S couplers can be used with low vacuum. However, as the leakage is not zero, avoid using them for vacuum holding purposes, etc. KK130 series S couplers cannot be used with vacuum.
Couplers that can be used with low vacuum
・KK/KKH Series
KK2: -100 kPa to 1 MPa
KK3: -90 kPa to 1 MPa
・KKH Series
KKH3: -90 kPa to 1 MPa
・KA Series
KKA3: -100 kPa to 1 MPa