Pulsafeeder Pre-Engineered Skid Systems - Manual (Page 12)

Pre-Engineered Skid Systems
Installation, Operation and Maintenance Manual
PES00039, Rev. B Installation Page 12
Installation, Continued…
Owner-Installed Piping/Tubing, Continued…
Air Bleed Valve Bypass Line
Although most metering pumps are self-priming, they can
not pump against pressure when handling air in the
priming cycle. An air bleed is necessary to enable the
pump to prime, and an air bleed valve is provided for this.
During the priming process, the air bleed valve is opened
with the opening knob. Air will pass through the Air
Bleed Bypass Line until the pump body is filled with
process fluid. When the process fluid flows through the
Bypass Line without any air bubbles, the pump is primed.
The opening knob is then closed and the pump is ready
for operation. Connect the Air Bleed Bypass Line to a
suitable receptacle. This is often the suction source but
can be a separate container. Firmly fix the outlet of the
Air Bleed Bypass Line within the receiving receptacle to
prevent any possible spraying.
Check all piping and tubing connections on the skid to ensure they are tight.
Check all other system piping and/or tubing connections to ensure they are tight.
Air Bleed
Valve
Pump
Discharge
Air Bleed
Bypass Line
Discharge
Tubing
Pump
Body
Pump
Suction
Figure 9
Air Bleed Valve Configuration
Suction
Tubing
Air Valve
Opening Knob