2XZ-C series of swing-piece vacuum pump, 1. Its rotate speed is fast, volume is small, weight is light, vent has anechoic equipment, noise is low and vibration is few. On the axes is installed the equipment stopping pump to prevent from returning oil, it can avoid pump oil in the oil box returningto pump antrum after pump is stopping running, so jump-start is easiest. 2. Installing gas valve, when taking out the air including a little vapor, opening gas valve can avoid water interfusing oil after vapor agglomerates and prolong used life of pump oil. 3. Vent is installed oil fog capture machine to eliminate oil fog excluded gas, and install collecting oil equipment out of axes to avoid leaking oil and pollute environment.