Welch Vacuum 2511B-76, C-75, C-76, C-77Aspiration/Filtration - Manual (Page 6)

2.50 Intake And Discharge Provision
2.51 The vacuum regulator and vacuum dial gauge enable control of fl uid aspiration into to the collection jar.
The vacuum regulator allows the vacuum level to be set between roughly a atmospheric pressure and the
maximum vacuum allowed for the pump model. A fl oat valve on the collection jar and, hydrophobic fi lter
keep water from accidentally being drawn into the unit. The regulator allows discharge pressure to be
set between atmospheric and the maximum possible for the pump model. Model 2511 is equipped with a
pressure port.
Note: Adjusting the vacuum regulators will affect the performance of the pump.
Please contact Welch technical service prior to start up at 847-676-8800 if you have any questions.
Intake Pressure / Exhaust
Vacuum Gauge Vacuum Regulator
WARNING
Never block the discharge port. If the exhaust is blocked, pressure
will build-up in the pump above its rated operating pressure.
6
Models 2511B-75 / 2511C-75 / 2511C-76 / 2511C-77