Skip to main content
Follow us on: 
Plate & Frame Heat Exchanger

OnSite and OffSite Services.

Universal Heat Transfer Products, a division of T. H. Industrial Solutions Inc.'s (THS) has been servicing industrial heat exchangers and 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.


Using Hydraulic Equipment, THS Service Technicians
will Disassemble and then Tighten a PHE to OEM Specifications

After service has been completed our THS service technicians will test for internal and external leaks. The primary side is filled under pressure with air or water while the secondary side is pressure free. On a plate defect, there’s a pressure reduction on the primary side.

Cleaning Service Options - Onsite Services (1-2 Days)

THS service technicians will high pressure clean plates using a 10 hp gas pressure washer, which is effective in cleaning dirt and biofilm, however this service may not effectively remove scale and rust buildup.


A portable chemical flushing unit consists of a pump, tank, filter and hoses. THS service technicians pump a citrus based cleaning chemical or mild acid solution through the heat exchanger for 6-8 hours. During the flushing any debris or contamination is collected in a bag filter with a magnet.

*The volume and velocity of the pump package is limited, PHE’s over 3 ft in height and with connections over 2", will not experience significant benefits using this sized pump package since most power supplies available are 120V

Recent Projects


THS service technicians with HTS PHE


Arrived on site, Transported equipment to mechanical room in basement, PHE Drained. Tightening using THS’ Electric Torque Control Wrench. Both sides of exchanger tested at 300 PSI for 30 minutes with no internal or external leaks


Clip or ball style gaskets can be replaced onsite during service. The most effective method to remove glue style gaskets is to complete the service offsite. Plates are submerged in either a caustic acid bath or nitrogen to break the glue bond. Plate and/or gasket delivery when in stock is typically 1-3 weeks. Custom is approximately 6-12 weeks as they must be molded and/or stamped.

*Chances of a PHE leaking increases to 50-60% probability when re-assembling a unit using gaskets that are over 10 years old, visibly damaged or brittle, causing the PHE not to seal completely. In addition, each time a PHE is taken apart the gaskets can be potentially damaged or may not reseat correctly when retightened.

Or contact us at Contact THS SERVICE or 905-831-4963 for a quote.

Offsite Services (2 – 3 Weeks)

After the gaskets have been removed, the plates are submerged in a bath of heated phosphoric or hydrofluoric acid to remove scale and contamination. When removed from the chemical bath the plates are then high pressure cleaned. Using this method plates are returned 95% - 99% to new condition.

Complete PHE replacement is often not practical:

  • due to the weight and size of many heat exchangers
  • accessibility to mechanical rooms is often severely limited

  • many heat exchangers were installed during initial construction before walls were installed
  • major piping changes are often required when installing new heat exchangers
  • piping standard connections may have changed from a diagonal pattern (X) to parallel
After the plates are chemically cleaned, the UV Tracer is applied. A fluorescent color is up-sprayed onto each plate. Then each plate is checked individually with UV light in a darkened area. Dye penetrant is than applied to the damaged plates for customers revealing the pinholes or cracks in the affected area.


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

Universal Heat Transfer Products (UHTP), a division of 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.

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

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.


Universal Heat Transfer Products Logo

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

T 905 831-4963


76 Harlowe Road, Unit 5, 6 & 7
Hamilton, ON L8W 3R6

T 905 318-0777
F 905-318-8422


Proudly Canadian logo

©2022 T. H. Industrial Solutions Inc.  SITEMAP