Leybold WA/WAU251 Booster Pump

Refurbished Leybold WA/WAU251 Series Booster Pump

The Leybold WA251 and WAU251 are Roots type blowers and are part of Leybold’s RUVAC series of blowers, all of which are equipped with labyrinth oil sealing technologies making them incredibly robust across a wide range of applications. The “A” designation indicates the booster is equipped with a direct drive TEFC motor, which is a good choice for general use where potentially harmful gases are not present. The WA251 is a non-bypass design and requires a pressure switch to engage the booster, whereas as the WAU251 is equipped with a bypass valve (“U” designates this) for improved pumping from atmosphere. Both models can be installed in either a vertical or horizontal orientation without internal modification.

Note: Other motor voltages available upon request.

All WA/WAU 251 booster pumps share the same data below. Download the full manual below.

Model	208V 60Hz PN	460V 60Hz PN
WA 251 (Non Bypass)	117 20 LV	117 20 HV
WAU 251 (Bypass)	117 21 LV	117 21 HV

Pumping Speed	149 cfm
Ultimate Pressure without Gas Ballast	10 mTorr
Power	1.5 HP
Dimensions (Inches)	12″H x 29″L x 11″W
Weight	WA=188lbs, WAU=197lbs.
Oil Capacity	1.2 Qts.