2560C-A01 Welch Vacuum Dry Vacuum Pump

The Welch Vacuum 256x / 258x Series Dry Vacuum Pumps features an overload protection available as an aid to minimize motor failure. Overload protection is a standard feature on both 50/60Hz single-phase motors. The motors have automatic overload protection. Automatic reset protection is designed to reset itself after a predetermined cooling period. If the fault to the drive remains unaltered, the motor will cycle on and off until fault is corrected.

Vacuum level regulation is accomplished with an adjustable bleed valve. The adjustable bleed valve allows close control of pressure in your apparatus. Pressure may be set between roughly atmospheric pressure and the maximum vacuum obtainable (9 torr, 29.6 in Hg).

A dial vacuum gauge is incorporated in the vacuum system. The dial gauge is located in the top front section of the system. The dial vacuum gauge is commonly used to indicate vacuum level when operating in the rough vacuum range (0 to 29.9"Hg) Dial vacuum gauges give negative pressure - that is pressure below atmospheric. The reference point for the gauges is atmospheric pressure. Please keep in mind that atmospheric pressure tends to vary from day to day. As a result of this variability, a dial vacuum gauge will indicate slightly different maximum vacuum readings from day to day.