Alfa Laval Gasketed Plate-And-Frame Heat Exchanger T6

Warning: This procedure requires trained personnel with PPE!

Warning: Testing by putting gas (compressible media) under pressure can be very dangerous. Local laws and regulations regarding to the hazard involved in testing with a compressible medium must be respected.

Warning: Any rebuilding or modification of the heat exchanger is the responsibility of the end user. Regarding recertification and pressure test (PT) of the heat exchanger the local laws and regulations for in service inspection must be respected.

Have plates or gaskets been removed, inserted or exchanged?

If no, skip the next steps and proceed to the final step.

Enter the operating pressure of the unit

Enter the allowable pressure (PS) as stated on the name plate

Is the pressure for the leakage test equal to the operating pressure + 10% of the actual unit but never above the allowable pressure (PS)?

If no, adjust the pressure and repeat the test.

6.1 Cleaning – Non-product side

The cleaning-in-place (CIP) equipment permits cleaning of the heat exchanger without opening it. The purpose of cleaning with CIP is as follows:

• Cleaning of fouling and descaling of lime deposits

• Passivation of cleaned surfaces to reduce susceptibility to corrosion

• Neutralization of cleaning liquids before draining

Follow the instructions of the CIP equipment.

Use proper protective equipment, such as safety boots, safety gloves and eye protection, when using the cleaning agents.

Warning: This check requires trained personnel with PPE!

Greasing of the tightening bolts

Protection of the plate pack and gaskets

Upload a photo of the heat exchanger after the check

Sign off on the heat exchanger check

The procedures below concern field gaskets, ring gaskets and end gaskets.

NOTE: Before removing the old gaskets, check how they are attached.

1. Open the heat exchanger, refer to Opening on page 33, and remove the plate that is to have a new gasket.

NOTE: Before opening the heat exchanger, check the warranty conditions. If in any doubt, contact the Alfa Laval sales representative. Refer to Warranty conditions on page 7.

3. Make sure that all sealing surfaces are dry, clean and free of foreign matter such as fat, grease or similar.

4. Check the gasket and remove rubber residual before attaching it.

To keep the heat exchanger in good condition, regular maintenance is required. It is recommended to record all maintenance of the heat exchanger.

The plates need to be cleaned on a regular basis. The frequency depends on several factors such as type of media and temperature.

Different methods can be used for cleaning (refer to Cleaning – Non-product side on page 31) or reconditioning can be performed at an Alfa Laval service center.

After a long period of use, it can be required to regasket the heat exchanger. Refer to Regasketing on page 42.

Other maintenance that should be performed regulary:

• Keep the carrying bar and guiding bar clean and grease.

• Keep the tightening bolts cleaned and greased.

• Check that all the tightening bolts are firmly tightened and that the dimension A is correct. Refer to the PHE drawing.;