Pulsafeeder Pre-Engineered Skid Systems - Manual (Page 18)

Pre-Engineered Skid Systems
Installation, Operation and Maintenance Manual
PES00039, Rev. B Pump Flow Calibration Page 18
Flow Calibration
Chemical metering systems are designed to provide chemicals to a process at precise flow rates.
Metering pump output (flow rate) can be set as a function of both stroke length and stroke frequency.
A Calibration Column is used to determine pump flow rate and to enable flow rate adjustments. The
column must be filled with the dosing chemical prior to performing the calibration.
A description of the Calibration Column and the calibration procedure is shown on Page 20. Review
this before proceeding with the next steps.
Filling Calibration Column
For a skid system with a cross-connect, the
Calibration Column is filled by the pump.
See Figure 15, at left.
1. Turn the Column Isolation Valve to allow
flow from the cross-connect into the
Calibration Column.
2. Then turn the Flow Diverter Valve to direct
flow from the Discharge Header through the
cross-connect and into the Calibration
Column.
3. Once the liquid level in the Calibration
Column reaches slightly above the topmost
scale mark, turn the Flow Diverter Valve to
re-direct flow into the system. Do not
overfill.
4. Close Column Isolation Valve.
5. Calibration Column is filled and ready for the
calibration procedure.
Note: While the Calibration Column is being filled in
this manner, dosing chemical will not be provided to
the served process.
!
CAUTION
Use extreme care when handling chemicals.
Avoid any spray, splatter or spilling.
Always wear appropriate protective clothing.
Flow Diverter
Valve (3-way)
Column Isolation
Valve (3-way)
Skid Suction
Valve
Pump Suction
Connection
Cross-connect
Calibration
Column
Figure 15
Skid System with Cross-connect