Operational Conditions of Plate Heat Exchangers
Consider these aspects when operating plate heat exchangers:
- Avoid liquid hammers.
- Ensure the device operates within permitted flow media, pressure, and temperature conditions.
- Ensure proper venting of the exchanger.
Standard Operating Procedure for Plate Heat Exchangers
Employ the following essential procedure
- Begin with the cold circuit.
- Completely vent the system.
- Shut the cock located between the pump and exchanger.
- Open the return line cock from the exchanger fully.
- Start the pump circulation as usual.
- Smoothly open the shut-off cock between the pump and exchanger.
- Re-vent the system if required.
Precautions for Temporary Shutdown
Follow these precautions:
- Close the control cock on the hot circuit while maintaining complete flow in the cold circuit.
- Deactivate the hot circuit pump.
- Allow the exchanger to cool down.
- Shut the cold circuit control cock.
- Turn off the cold circuit pump.
- Close all remaining shut-off valves.
Long-term Shutdown Precautions
Steps for disconnecting the unit include:
- Never open a heat exchanger when hot; allow cooling first.
- Reduce both fluid pressures.
- Fully drain all fluids from the unit.
- Lubricate all bolts.
- Loosen the setting bolts until the plate pack is relaxed.
- Refrain from removing tie bolts.
- Cover the plate pack to shield it from sunlight.