Relay spacing quick estimate
Enter flow, LDH C-value, lay length, and available pressure drop to estimate relay segments.
Relay pumping
Relay pumping calculator and distance planner
Plan LDH relay pumping concepts, engine spacing, flow-based friction loss, and driver/operator training questions.
Training note: These web tools are for education, practice, and estimating. Use your department SOPs, instructor direction, and manufacturer guidance for live operations.