Alfa Laval Heat Exchanger T20

Warning: Ensure the heat exchanger is shut down before starting the procedure

Is the heat exchanger shut down?

If the heat exchanger is not shut down, stop the procedure and shut it down first

Is the ambient temperature below the freezing temperature of the media?

If yes, proceed with draining. If no, skip the draining step

If yes, proceed with draining. If no, skip the draining step

Did you rinse and dry the heat exchanger plates and connections?

If no, rinse and dry the heat exchanger plates and connections

During manual cleaning, it is necessary to open the heat exchanger to clean the plates.

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.

WARNING: If the heat exchanger is hot, wait until it has cooled down to about 40°C (104°F).

WARNING: If necessary, use proper protective equipment, such as safety boots, safety gloves and eye protection, depending on the type of media in the heat exchanger.

The bolt configuration of the heat exchanger varies between different models. The major force of the plate pack is held by the tightening bolts (TB). To distribute the force evenly over the frame plate and pressure plate, locking bolts (LB) are used as well. The locking bolts can be shorter and can have smaller dimensions.

In the opening and closing procedure, it is important to identify the tightening bolts (TB) and the locking bolts (LB). Refer to the picture on page 35.

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.

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

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.;