Clip-On vs Glued Plate Heat Exchanger Gaskets

When replacing plate heat exchanger gaskets, start with the plate you already have. Its groove and attachment features determine which replacement gasket will fit. A clip-on gasket cannot be selected simply because it looks easier to install.

The difference between clip-on and glued gaskets matters most during maintenance. One uses mechanical features to hold the gasket in place; the other uses adhesive. This changes the removal, preparation and installation work, but it does not tell you, by itself, which exchanger can handle a particular pressure or temperature.

For an existing unit, the first question is whether the replacement matches the plate. For a new unit, maintenance access and servicing requirements can also help guide the choice.

What holds the gasket in place?

A clip-on gasket uses moulded tabs or other mechanical retention features to secure it to the plate. The arrangement varies by design: some features engage with the plate edge, while others fit dedicated attachment points. Terms such as clip-on and snap-on should be checked against the actual gasket drawing or sample.

A glued gasket uses adhesive to retain it in the plate groove. The adhesive and application procedure must suit the gasket, plate and service conditions.

In both designs, sealing depends on the correctly matched gasket being compressed within the plate pack. The attachment system helps position and retain it; it does not replace the need for the right profile, material and assembly dimension.

Aiprel’s replacement heat exchanger gaskets page lists material families, attachment options and representative compatible models. Confirm the exact plate variant before ordering, especially when the original gasket reference is missing.

Replacing clip-on gaskets

Once the exchanger has been isolated, drained and opened according to its maintenance instructions, the old gasket can be released from its attachment points.

Take care around the retaining tabs. Pulling the gasket away while a tab is still engaged can damage it. Use the removal method specified for that design rather than forcing it out with a sharp tool.

Before fitting the replacement, clean the groove and check the plate for damage. Work around the gasket progressively, making sure the retaining features engage and the seal sits evenly. Pay attention to the port areas and corners, where an incorrectly seated section may be less obvious.

The practical advantage is that there is no adhesive application or curing stage. That can simplify replacement work, particularly when plates need regular access.

It does not mean the unit is ready to run as soon as the last tab is fitted. Plate order, gasket seating, the closing dimension and any required leak or pressure testing still need to be checked.

Replacing glued gaskets

With a glued gasket, preparation includes dealing with the existing adhesive bond.

Remove the old gasket and adhesive using the method approved for the plate and bonding system. Avoid treating scraping, solvents or heat as interchangeable options. A method that works for one assembly may damage another or leave a surface unsuitable for bonding.

The groove must be prepared as specified before fresh adhesive is applied. Follow the instructions for adhesive quantity, gasket positioning, handling and curing.

Curing time belongs to the adhesive specification. It should not be estimated from a general article or from a different product used on a previous job. Some systems require controlled heating; others have specified ambient curing conditions.

For maintenance planning, confirm the procedure before opening the exchanger. It may be more practical to arrange a prepared spare plate pack or off-site regasketing than to complete every bonding step during a production shutdown.

Can you change from glued to clip-on?

Do not assume that ordering a different gasket will convert the existing plate.

The replacement must match the groove, port-seal arrangement, gasket cross-section and retention features. Similar overall dimensions are not enough.

If you want to change attachment systems, ask the equipment manufacturer or replacement supplier to check the exact plate model and variant. A change may require compatible replacement plates or may not be supported for that configuration.

Replacing plates also involves more than matching their outside dimensions. Plate pattern, thickness, material, port arrangement and the complete pack configuration need to remain suitable for the duty.

For a working exchanger with serviceable plates, keeping the specified attachment system may be the more economical option. A proposed conversion needs to be assessed against the cost of the complete change.

Does glued mean better for high pressure?

A glued gasket should not be treated as an automatic upgrade for high pressure, vibration or pressure cycling.

Those conditions must be assessed against the exchanger’s design and approved configuration. The plate support, gasket groove, compound, frame and closing dimension all matter.

If the operating pressure or cycling pattern has changed, give the supplier the new conditions. Changing the attachment method alone does not establish that the equipment is suitable for the revised duty.

Material compatibility remains a separate check. A correctly attached gasket can still deteriorate if the compound is unsuitable for the process or cleaning fluid. Our comparison of NBR, EPDM, HNBR and FKM gaskets explains what to review on the material side.

Compare the whole maintenance job

The price of a gasket is only one part of a replacement quotation. To compare options fairly, use the same plate model, quantity and scope of work.

Include:

• Replacement gaskets and any plates that also need replacing.
• Removal, cleaning and inspection labour.
• Adhesive and bonding work, where required.
• Curing facilities and elapsed curing time.
• Reassembly and testing.
• Transport or off-site servicing.
• The time the exchanger will be unavailable.

Separate labour hours from elapsed downtime. A curing period may extend the schedule without requiring someone to work on the equipment throughout it. Conversely, a unit with a spare plate pack may return to service while the removed pack is being refurbished.

This is why a fixed claim such as “clip-on costs less” is not enough for a purchasing decision. Compare the work your particular exchanger needs.

Can an existing gasket be reused?

Opening a plate pack does not automatically mean every gasket must be replaced. It also does not mean that a gasket which looks intact is ready for another service cycle.

Check its condition against the equipment’s maintenance criteria. Look for cracking, swelling, hardening, permanent deformation and damaged retaining features. Review its service history and whether it sits correctly in the groove.

For glued gaskets, inspect the bond as well. A loose section needs assessment; adding adhesive without checking the gasket and surface condition may leave the underlying problem unresolved.

Whether to reuse, repair or replace should follow the applicable maintenance procedure and inspection findings.

What to send when ordering

A clear identification request can prevent a mismatch from being discovered during reassembly.

Provide the exchanger manufacturer and model, plate code, gasket reference if available, and the required quantity. Include photographs of the complete plate, the port area, the groove and the attachment features.

Also provide the fluids on both sides, operating temperatures and pressures, and cleaning conditions. If you are requesting a change from the existing gasket, explain what you want to improve: replacement time, repeated leakage, material life or another maintenance issue.

Contact Aiprel with your plate details and operating conditions to confirm the replacement profile, attachment type and proposed compound. Photographs can help identify the design; where details remain uncertain, a drawing or sample may be needed before the replacement is specified.