01

Define the process and operating philosophy

Document each chemical, dose range, injection point, process-flow variation and availability target. Establish whether pumps operate duty/standby, duty/assist or independently, and define how changeover occurs.

  • Chemical consumption and storage autonomy
  • Number and location of injection points
  • Normal, minimum and maximum dose
  • Duty/standby and changeover philosophy
  • Manual, local automatic or remote operation

02

Engineer storage and preparation

Tank volume, bunding, venting, filling, level measurement, drainage and agitation must match the chemical. Where solution preparation is required, define dilution water quality, mixing time, sequence and prevention of over-concentration or settling.

  • Bulk, storage and day-tank interfaces
  • Low and low-low level actions
  • Agitator duty and impeller selection
  • Safe filling and overflow routing
  • Drain, flush and sampling provisions

03

Design reliable pump hydraulics

Keep suction lines short and generously sized, avoid gas pockets and confirm NPSH and acceleration losses. On discharge, include appropriate relief, back-pressure, pulsation control, isolation and calibration provisions. Route relief discharge to a safe, compatible destination.

  • Flooded suction where practical
  • Independent suction lines where required
  • Rated relief path without blocked-in sections
  • Pulsation review for piping and instruments
  • Injection quill and non-return arrangement

04

Plan controls, safety and lifecycle access

Develop the cause-and-effect philosophy before panel fabrication. Include level trips, pump status, pressure alarms, leak detection and remote signals as required. Provide access to remove valves, diaphragms, motors and instruments without dismantling unrelated equipment.

  • PLC and communication requirements
  • Hazardous-area classification
  • Emergency stop and permissives
  • Lifting, access and maintenance clearances
  • Factory testing, preservation and site commissioning

Frequently asked questions

Why use duty and standby dosing pumps?

Redundancy can maintain chemical treatment during maintenance or failure, but the control logic, isolation and common-cause risks must be engineered.

Does every skid need a pulsation dampener?

Not always. The need and size depend on pump type, piping, flow, pressure and allowable pulsation at instruments and injection points.