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PLATES & GASKETS

Gasket Selection.

Provide the following information to our THS sales team for a quote at Contact THS SERVICE or 905-831-4963.

  • 1.
    Manufacturer
  • 2.
  • 3.
    Application (Water, Steam, Glycol)
  • 5.
  • 6.
    Quantity
  • 7.
    Type
  • 8.
    Nameplate Image

Model Finder

  1. Measure the center to center mm of the port holes horizontal (A) and vertical (B).

  2. Choose Manufacturer for model chart 

MEULLER Gaskets

MEULLER Gaskets

Model
Frame type
AT 4
CD-CDSC-CDLC
AT10
CDS-CDL
AT20
B-BC-CDS-CDL
AT20P
B-BC-CDS-CDL
AT40
B-BC-CDS-CDL
A = mm 61 118 212 212 257
B = mm 480 691 868 868 1227
           
Model
Frame type
AT40P
B-BC-CDS-CDL
AT80
B-CDL-BC
AT80P
B-CDL-BC
AT130
B
AT402
C
A = mm 257 382 382 450 257
B = mm 1227 1526 1526 1826 481
           
Model
Frame type
AT405
B-CDS-CDL
AT405P
B-CDS-CDL
AT805
B-CDL
AT1306
B
AT1309
B
A = mm 257 257 382 450 450
B = mm 845 845 966 1266 1639
           
Model
Frame type
AT40FF
B-CDS-CDL-BC
AT159FF
BC
AT161FF
BC-BCV
AT184FF
B-CDL
AT192FF
B
A = mm 257 221 310 405 550
B = mm 1227 984 1240 1530 1885
           
Model
Frame type
AT250
B
AT2508
B
     

Material

Selecting the wrong gasket can be a timely and costly mistake. Let our experienced THS sales team recommend the most durable and cost effective gasket material for your application by providing us with the pressure, temperature and process liquid details.

Buna (NBR/Nitrile), EPDM or Viton materials are the most common plate & frame heat exchanger gaskets depending on the operating application.

Food Grade
Standard Grade
Aggressive Chemical Compounds

Changes in Gaskets:

  • Time – Relaxes
  • Temperature – Deteriorates
  • Oxidizing Agents – Hardens
  • Swelling – Chemical Absorption

Gaskets Material Depends on:

  • Fluids Used
  • Temperature and Pressure

Standard Gasket Styles

Clip - will usually have rubber tabs that are visible from the outside of the heat exchanger

Glue – no tabs and in most cases the brown glue is visible under the gasket; typically used in high pressure or high temperature applications

Ball - used in HVAC or FDA applications to allow for easy removal in the field 

WHEN SHOULD A PLATE & FRAME HEAT EXCHANGER BE SERVICED?

As a heat exchanger becomes fouled with dirt, debris or scale, often the modulating valve provides additional hot or cold liquid to help compensate for the loss of efficiency of the heat exchanger.

Over time the control valve will continue to open fully. Unfortunately, on the hottest or coldest days, even with the valve fully open the heat exchanger cannot meet the thermal transfer requirements and the situation becomes critical.

Monitoring just the operating temperature provides a false sense of security. Recording the difference in the outlet and inlet pressures provides a more accurate result of the amount of fouling.

Fouling equal to the thickness of a piece of paper represents a 20% loss of thermal efficiency. In addition, the energy cost for pumps increases since the pump must work harder to overcome the increased pressure resistance through the PHE

Can Double Wall Plate & Frame PHEs Be Cleaned or Serviced?

Double wall plate and frame heat exchangers (PHEs) are specialized systems designed to prevent cross-contamination, making them ideal for applications like potable water, food processing, and pharmaceuticals.

A common question is: Can double wall plate & frame PHEs be cleaned or serviced?

Yes, double wall PHEs can be effectively cleaned and serviced using methods like Clean-in-Place (CIP), chemical flushing, or mechanical cleaning, ensuring efficiency and compliance with safety standards.

What Are Double Wall PHEs?

Double wall PHEs feature two plates between fluid channels, providing a failsafe against leaks and cross-contamination, as highlighted by T.H. Industrial Solutions. If a plate develops a pinhole or crack, the double wall design prevents fluid mixing, making them critical for potable water systems under municipal codes, as noted in industry standards.

How Are Double Wall PHEs Cleaned and Serviced?

Cleaning and servicing double wall PHEs involve tailored methods to maintain their integrity:

  • Clean-in-Place (CIP): Alfa Laval and Hofmann Heat Exchanger endorse CIP systems, circulating cleaning solutions like citric acid or sodium hydroxide to remove scale or organic deposits without disassembly, ideal for routine maintenance.
  • Chemical Flushing: Heat Exchanger Ontario uses portable units with pumps and filters to circulate mild acid or citrus-based solutions for 6–8 hours, effectively clearing debris, though less effective for hardened scale.
  • Mechanical Cleaning: For severe fouling, plates are disassembled and cleaned with high-pressure water or soft brushes, ensuring no damage to plates or gaskets.
  • Inspection and Testing: Post-cleaning, dye penetrant testing, used by T.H. Industrial Solutions, detects cracks or pinholes to ensure reliability.

Effectiveness of Cleaning Double Wall PHEs

  • Restores Efficiency: Cleaning removes scale and biofilms, reducing pressure drops (7–10 psi indicates service need) and improving heat transfer.
  • Ensures Safety: Servicing maintains the double wall’s protective barrier, critical for potable water.
  • Prolongs Lifespan: Regular maintenance, prevents corrosion and gasket wear, ensuring compliance with regulations.

Limitations and Considerations

  • Material Compatibility: Cleaning agents must suit plate and gasket materials to avoid corrosion.
    Severe Fouling: Hardened scale may require disassembly and mechanical cleaning, increasing labor compared to CIP, per industry standards.
    Environmental Compliance: Spent chemicals must be neutralized.
    Expertise Required: Services from T.H. Industrial Solutions ensure safe cleaning and proper flow rates (e.g., 1 ft/sec).

When to Clean or Service Double Wall PHEs

Service is recommended every 5–6 years or when differential pressure reaches 7–10 psi, indicating fouling. Double wall PHEs in potable water systems require regular maintenance to meet municipal codes, ensuring no cross-contamination risks.

Conclusion

Double wall plate and frame PHEs can be effectively cleaned and serviced using CIP, chemical flushing, or mechanical methods, maintaining efficiency and safety. Industry leaders like T.H. Industrial Solutions provide expert services tailored to double wall PHEs. Trust professionals to ensure compliance and optimal performance.

T.H. Industrial Solutions Inc. (THS) has been servicing industrial plate and frame heat exchangers as with shell and tube heat exchangers.  Professionally solving process problems across Canada since 2009. THS head office is located in Pickering, Ontario with a 6,000 square foot service center in Hamilton, Ontario.

Today there are fewer qualified people in this industry that know the products and understand the applications. Utilizing hands on experience and knowledge that has been gained by our THS sales and service technicians for over the past 30 years, we will take the time to understand what you require and strive to provide a prompt, educated and accurate response at a competitive price.

Our Heat Exchanger Cleaning Services, along with heat exchanger gasket replacement systems, and knowledge of heat exchanger gasket materials make THS your Industrial Heat Exchanger Service Solution

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HEAD OFFICE

1550 Bayly Street, Unit 15
Pickering, ON L1W 3W1

T 905 831-4963

SERVICE CENTER

76 Harlowe Road, Unit 4 - 7
Hamilton, ON L8W 3R6

T 905 318-0777
F 905-318-8422

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