Alfa Laval Gasketed Plate-And-Frame Heat Exchanger TL6

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.

6.3 Manual cleaning of opened units

CAUTION: Never use hydrochloric acid with stainless steel plates. Water of more than 330 ppm Cl may not be used in the preparation of cleaning solutions.

It is very important that aluminium carrying bars and support columns are protected against chemicals.

NOTEP:Be careful not to damage the gasket during manual cleaning.

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

WARNING: Corrosive cleaning liquids. Can cause serious injuries to skin and eyes!

6.3.1 Deposits removable with water and brush

Plates do not need to be removed from the heat exchanger during cleaning.

1. Start cleaning when the heating surface is still wet and the plates are hanging in the frame.

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.

Plates or gaskets removed, inserted or exchanged?

One media side at a time tested with the other side open to the ambient pressure?

In a multi-pass set up, all sections of the same side tested simultaneously?

Enter the pressure used for the leakage test

Pressure for the leakage test is a pressure equal to the operating pressure + 10% of the actual unit but never above the allowable pressure (PS) as stated on the name plate?

Test time is 10 minutes for each media side?

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

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.;