Regasketing

The Heat Exchanger Ontario regasketing service is normally a 10 to 12 day program, depending on the required cleaning, plate size and number of plates. If required, a 2 or 5 day turnaround is possible against a rush surcharge.
 

The Heat Exchanger Ontario regasketing service consists of the following 8 steps:

 

Plate Log
The first part of the regasketing service program is the initial log in. Every plate is identified, logged, and visually inspected, to determine if it merits reconditioning. In this process the objective is to identify deformation, obvious pin holes, cracks, corrosion or, even erosion. An inspection that requires a highly trained and knowledgeable team.

 

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Old Gasket Removal
One of the benefits of using the Heat Exchanger Ontario regasketing service is that trained service engineers will determine if your gaskets are reusable or not. In some cases we have saved customers thousands of dollars by carefully inspecting gaskets to determine if portions or even all of the old gaskets can be re-used. If the gaskets need to be replaced, Heat Exchanger Ontario service engineers will select the best possible method for removal. This will differ from application to application of service in which the plates have operated and it will differ from plate type to plate type.

 

 


 

Plate Cleaning
Depending on application of operation, type of fouling, and amount of fouling our engineers will determine the proper cleaning and treatment process needed for the particular model and material. This will vary from case to case as different cleaning techniques are implemented. A carefully selected cleaning solution will be used to assure the quickest possible refurbishment. Different temperatures, agitation, and concentrations will be utilized to assure maximum cleaning efficiency.

 

 


 

Dye Penetrant Test
Every plate that Heat Exchanger Ontario services is dye penetrant tested. This will eliminate any plates that may have pinholes, cracks or anything that would cause cross contamination. It is extremely important that every plate is dye tested as 90% of the plates tested have less than 10% failure rate This means that if the plates are random checked or tested at a 10% rate the bad plates will not be identified. Pin holes or cracks can be very costly if put back into operation. It could mean costly down-time and possibly loss of product if cross contamination would occur.

 

 


 

Gasket Groove Preparation
It is imperative that the gasket groove is prepped before applying new gaskets. Left over glue can cause gaskets not to adhere properly and can reduce the operation life dramatically. Heat Exchanger Ontario's service engineers are trained and have over 120 years of combined experience at regasketing plates. Rolled grooves is the #1 cause for external leakage after regasketing. If a rolled groove is not identified the plate pack will not seal properly and will again cause costly down-time. With the Heat Exchanger Ontario regasketing service program this type of deformation will be identified. In most cases Heat Exchanger Ontario will be able to repress the plates. This can save up to 60% of the costs of the new plate and extend the life of the plate for years.

 

 

regasketing

 

 

Gasket Application
Gasket application using superior-bonding adhesive is critical in the regasketing process. Selection of adhesive depends on the application and the operation conditions under which the plate heat exchanger will be in service. Media as well as temperatures and pressure are factors when adhesive is selected. If proper adhesive is not used the lifetime of the gaskets will be reduced dramatically. In fact, using improper adhesive can cause improper conformance of plate to gasket and result in rolled grooves, corrosion and can even cause plates to crack during assembly.

 

 

 

 

Heat Curing
At Heat Exchanger Ontario all gaskets that are glued in are heat cured under pressure for three to four hours in an industrial oven. Depending on the adhesive used and the gasket and plate material the curing temperature is between 280-310 degrees Fahrenheit. If the adhesive is not properly heat cured under pressure gaskets will often fall off during installation resulting in more down-time which equals loss of production. One of the major benefits of the plate heat exchanger is that it is designed for opening, washing and reassembly without having to replace gaskets. If oven curing has not been performed it is most likely the gaskets will end up on the floor when the heat exchanger is opened. Again this is unnecessary down-time and often very costly. Correct heat curing increases the lifetime of the gasket by up to 10 times that of ordinary rubber glue without curing.

 

 

 

 

Final Quality Control
Before shipment every plate is carefully inspected for gasket straightness, solid bonding, excess adhesive, deformations and plate pack sequence. When drawings are supplied every plate pack will be returned in assembly order allowing for quick and easy installation.

 

 

regasketing