Alfa Laval Heat Exchanger T25

Warning: This procedure must be performed by a person authorized according to local laws and regulations.

Warning: Testing by putting gas under pressure can be very dangerous. Local laws and regulations regarding 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.

Are plates or gaskets removed, inserted or exchanged?

If yes, perform a hydrostatic leakage test to confirm the internal and external sealing function of the heat exchanger.

Enter the pressure for the leakage test

Did the heat exchanger pass the leakage test?

If storing for longer periods of time, such as one month or longer, certain precautions should be made to avoid unnecessary damage to the heat exchanger. Refer to Outdoor storage on page 45 and Indoor storage on page 45.

Alfa Laval and its representatives reserve the right to inspect the storage space and/or equipment whenever necessary until the expiration of the warranty period stipulated in the contract. Notification must be given 10 days prior to the date of inspection.

If there is any uncertainty about the storage of the heat exchanger, consult an Alfa Laval representative.

If storage of the heat exchanger after delivery is known in advance, inform Alfa Laval when ordering the heat exchanger to ensure that it will be properly prepared for storage before packing.

• Store inside a room with the temperature between 15 and 20°C (60–70°F) and humidity up to 70%. For outdoor storage read Outdoor storage on page 45.

• To prevent damage to the gaskets, there should not be any ozoneproducing equipment in the room such as electric motors or welding equipment.

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

Check how the old gaskets are attached before removing them.

Open the heat exchanger and remove the plate that is to have a new gasket.

Ensure all sealing surfaces are dry, clean and free of foreign matter such as fat, grease or similar.

Check the gasket and remove rubber residual before attaching it.

Attach the gasket to the plate. Slip the gasket tabs under the edge of the plate.

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!

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.