Alfa Laval Heat Exchanger TL15

Start-up after long-term out of service

Measurement between frame plate and pressure plate (A dimension)

Feet attached to the pressure plate removed

Leave the heat exchanger for 24-48 hours, the longer the better, for gaskets to relax.

Re-tightened according to the instructions

Alfa Laval recommends a hydraulic test should be carried out.

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.

If the heat exchanger is shut down for several days or longer, it should be drained. Draining should also be done if the process is shut down and the ambient temperature is below the freezing temperature of the media. Depending on the media processed, it is also recommended to rinse and dry the heat exchanger plates and connections.

Avoid vacuum in the heat exchanger by opening vent valves.;

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.