Leybold SV100, Leybold SV200, Leybold SV300, Leybold SV630, Leybold SV200B, Leybold SV100B, Leybold SV300B, Oerlikon Leybold SV750B treasure SOGEVAC BI series of single-stage rotary vane vacuum pump seal Product Features: 1. only has the advantage of single-stage pump rugged durability, while achieving a lower ultimate pressure and the low pressure under high pumping speed. Applications: especially suitable for analytical instruments, as well as freeze-dried, laboratories, cooling, lighting and so on. Parameters: Model pumping speed (m3 / h) speed limit vacuum partial pressure off gas ballast (mbar) vacuum speed limit gas ballast open partial pressure (mbar) SOGEVAC BT 28-40 <0.05 <0.5