One circuit
A defined path with known valves, equipment and return destination. Mark every branch included in the cleaning duty.
CIRCUIT ENGINEERING
Draw the return before sizing the skid.
A cleaning circuit includes the selected supply, equipment path, return and isolation boundary. Count connected circuits separately from those that must run together.
- 01 · Supply tankSelected medium
- 02 · Pump + heatRequired flow & conditions
- 03 · Equipment circuitIsolated from production
- 04 · Monitor returnMeasured state & criteria
RETURN DECISIONQualified return → selected recovery tankRejected return → controlled drain
Production state: cleaning supply and return are isolated under the agreed valve and control arrangement. A drawn connection does not prove safe isolation.
Many connections
A skid can serve multiple connected circuits sequentially. Scheduling and changeover determine the required cleaning window.
Concurrent duties
Two active circuits need a reviewed control and hydraulic arrangement, including total utility demand and independent return behavior.
A USEFUL NUMBER, WITH A LIMIT
Estimate straight-pipe liquid inventory.
Use the internal bore, not the nominal pipe label. The result excludes equipment, fittings, tanks and reserve volume. It is not total CIP tank sizing or a pump flow.
Before approving the connection matrix
- List equipment that can remain in production during each cleaning duty.
- Identify chemical/product isolation, leakage handling and valve feedback.
- Define destinations for displaced product, rejected solution, recovered liquid and final drain.
- Record the operating and failure cases to review with the plant team.
Map your most difficult circuit.
Supply and return length, elevation and equipment restrictions are more useful than a guessed skid capacity.