Standard PHE Operating Procedures

Standard operating principles are critical for preventing damage to the unit:

1. In steam applications, never leave the steam on with the liquid side turned off. Turn the steam off first and on last.

2. Water hammer, if suspected, must be diagnosed and eliminated, or damage may result.

3. Pumps should always be started against closed valves.

4. Valves must be set to open and close gradually. Sudden opening and closing of the valves will subject the exchanger to mechanical and thermal shock and may cause material fatigue.

5. Starting up and shutting down should be managed to minimize differential expansion. Follow the stated start-up and shut-down steps in order.