Our product range includes a wide range of Heat Exchanger Inspection Service

Approx Price: Rs 2,500 /Day

Requirements to the installation area

It is very important that enough space around the plate type heat exchanger is kept free for servicing of the unit (renewal of plates, tightening of the plate package).

As a rule the free space around the unit should be 1, 5 to 2 x the width of the unit.

Transport, lifting and storage



Lifting:

Usually the heat exchanger will be supplied horizontally on a pallet. The back side of the head will then be tightened to the pallet. This allows you to transport the unit by means of a fork lift truck.

Rising of the unit:

• Remove all tightening elements from the pallet;

• Place straps around one bolt on each side as shown on the picture. Never use steel cables or chains!

• Lift the heat exchanger from the pallet;

• Lower the heat exchanger slowly to vertical and on it’s feet and place it in it’s end position on the floor.

• Remove the straps and tighten the heat exchanger to the floor.

Attention:

ALWAYS: Use the lifting eyes (if fitted)

Lift the top side of the head

Attach the straps to the bolts close to the head

Storage:

Should it be necessary to store the heat exchanger for a longer period (1 month or more), certain precautions should be taken in order to prevent unnecessary damage to the equipment.

Preferably the heat exchanger should be stored inside in a room with a temperature around 15 to 20 ºC and a humidity of max. 70%. If this is not possible, place the heat exchanger in a wooden box which is provided with a lining on the inside against penetration of moisture.

There should absolutely not be any ozone producing equipment in the room, like electric motors or arc-welding equipment, since ozone destroys many rubber materials. Also do not store organic solvents or acids in the room and avoid heat or ultraviolet radiation.





NEVER: Lift using the connections Lift the follower

Lift using an intermediate plate

Lift with a strap attached close to the follower



Installing the pipe connections

We advise you of the following:

• Heavy pipe work needs to be supported. This will prevent heavy forces on the heat exchanger.

• Always install flexible connections on the follower to prevent vibrations on the heat exchanger. These flexible connections also prevent expansion of the pipe work, caused by temperature influence, onto the heat exchanger.

• These flexible connections need to be fitted in a longitudinal direction to the plate package.

• The pipe work needs to be thoroughly cleaned and flushed before connecting up to the heat exchanger.

• Always install vents on both sides of the heat exchanger.

Note: For proper venting the vents should be fitted on the highest point in the direction of the flow of the medium (preferably on an air vessel).

To enable the heat exchanger to be opened when necessary shut off valves should be provided in all connections!




Threaded pipe connections:

If a plate type heat exchanger is provided with threaded pipe connections, make sure that these connections do not rotate when fitting to the pipe work. It could damage the gasket on the start plate. You need to make “counterhold” on the connection!

Flange connections:

If the connection is rubber lined, the liner will act as the flange gasket. Bolt the connecting flange directly to the endplate using the drilled and tapped holes provided. Tighten the bolts evenly – do not over-tighten as this could strip the threads cut into the frame plate.

If loose backing flanges are fitted to the heat exchanger a suitable gasket is required to seal the flange.

Unless otherwise stated, the liquid circuits should be connected to flow in reverse directions through the exchanger (counter-current). Refer to the contract drawing or quotation details if the connections are not marked.

This image has an empty alt attribute; its file name is heat12.png
fig 10

Opening the plate heat exchanger


When opening and assembling the heat exchanger observe the following:
• Measure and note the actual "A" size;
• Use the correct tools and lubricant;
• Shut down the heat exchanger as described under 7.3;
• Make sure the heat exchanger cools down (<40 ºC);
• Ensure there is no pressure on any part of the unit;
• Clean the tie (clamping) bolts and grease the threads;
• Loosen the tie clamping bolts equally in the correct order (fig. 10) i.e. that
the follower shall have a parallel opening motion;
• Pull the follower back towards the column;
• Remove the plates without damaging the gaskets.

CAUTION:

Ensure unit is depressurized and drained of hot and/or aggressive product before unit
is opened to prevent personal injury.

CAUTION:

Sharp edges. When handling plates, gloves should be worn.

Recommendation:

Mark the plate package before opening.
You could mark the plate package with a diagonal line on the outside fig 10a, or number
the plates in sequence.

Cleaning the plates

CAUTION:

Always wear gloves and eye goggles when using cleaning detergents.
Use nylon or other types of “soft” scrubbing brushes with detergent.
Never use a metal brush, steel wool or sand/glass paper.
This will damage the passivation film of the plates.
Use Acetone or other types of solvents which do not contain chlorine to remove old gasket
glue. Alternatively use a ”lowtemp.” gas flame softly heating the reverse side of the plate.
Do not use any other type of gas which may produce a “harder” flame.
Remember ventilation. Boiling water can be used with some success.
Consult a cleaning specialist for a suitable choice of detergent. Ensure that all detergents
used are compatible with the plate and gasket material before use.


In case plates are removed for manual cleaning, make sure they are re-fitted in the same
order.
Always remove plates one by one and number them!
A high pressure cleaner can be used but with absolute care and never add abrasives.
If the scaling or organic layer is thick the plates can be put in a barrel with qualified
cleaning material.
Before fitting chemical cleaned plates they need to be thoroughly rinsed with fresh
water!

Important:


Cleaning is an important part, influencing the effectiveness of the plate heat exchanger.
Insufficient cleaning can have the following results:
• too low circulation flow;
• insufficient thermal output;
• life time of the heat exchanger will be shortened.
If a plate has to be renewed because of serious damage, the plates next to this plate
normally need to be replaced.