Refurbished

Heat Exchanger Ontario keeps a large inventory of used plates and frame parts in a range of different sizes, ranging in port sizes from ½” to 8”.

We offer to size a used plate heat exchanger specifically to your thermal requirements, this will be a custom designed unit using refurbished plates and frame parts with brand new gaskets. The plate heat exchanger will look and work like new but will in most cases cost less than half of a new heat exchanger.

Please contact our application engineers with your specifications to get a quotation!

Information concerning: Heat Exchanger Ontario rubber materials
Rubber materials are blends of additives. Each rubber material is unique. In some cases, the materials from different suppliers are very similar, and in other cases they are not. The most important ingredient is the POLYMER, which may be from 15 to 70% (usually around 50%) by weight of the rubber material.

A typical formulation may look like:
          POLYMER 50%
          Fillers 40%
          Softener 5%
          Activators 2%
          Curative 1%
          Accelerators 1%
          Antioxidant 1%

All additives (type and concentration) effect the properties of the rubber material, this influencing the final properties of the product.

A rubber material developed for a certain product is seldom useful in other applications. For technically more advanced products there are always specially developed materials to fulfill the specific demand.

Heat Exchanger Ontario Rubber materials are specifically designed for PHE applications.

Polymer types
Nature Rubber (NR) is the only commercially used non-synthetic polymer type. Main applications are for dynamic and abrasive environments. Typical markets are automotive and mining industries.

The synthetic polymers are manufactured to achieve special properties that Natural Rubber does not have. Examples for such properties are resistance to oils and special chemicals, high temperature and weather (ozone, UV-light).

The standard rubber polymer for weather resistance or water/steam resistance is EPDM (Ethylene-Propylene Rubber), while Nitrile rubber (NBR) is the standard rubber polymer for oil resistance.

Some other examples of polymer types are:
       Chlorinated Polyethylene (CM)
       Acrylic Rubber (ACM)
       Polysulphide Rubber (T)
       Polyurethane Rubber (AU<EU)
       Polynorbornene (PNR)
       Polypropylene (PO)
       Fluorocarbon Rubber (FKM)
       Perfluoroelastomer (FFKM)
           

and so many more…

 The curing/vulcanization of rubber is a chemical reaction, where the curatives will alter the polymer being a high viscous liquid to be a solid, thus giving the material its elasticity.

Heat Exchanger Ontario works with the world’s leading suppliers of raw rubber materials.

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Gasket Materials
For plate heat exchangers the standard materials are EPDM and Nitrile rubber (NBR). EPDM is used normally for non-fatty/oily applications, and NBR for oil/fat applications. But there are no rules without exceptions. An “oil”, and fatty application may have a low fat content, making the
application more suitable for EPDM instead of NBR.

Other rubbers used for PHE’s are Hydrogenated Nitrile Rubber (HNBR), Fluorocarbon rubber (FKM), Butyl, Chloroprene Rubber (GR), Chlorsulphonated Polyethylene (CSM), Styrene Rubber (SBR), Natural Rubber (NR) and Silicone Rubber (Q) are less common ones.

All additives matter for the product properties, and not only affect the quality level of the product, they also influence the consistency of the quality level.

LIFETIME
Eventually all rubber materials will degrade, losing their properties, making them unsuitable for further use. It is all a matter of time and the original quality of the product. The lifetime of rubber products is dependent on the environment (chemical types, concentrations) and temperature. Temperature changes and pressure changes affect the performance and lifetime of the rubber product as well.

Chemical Resistance
Each rubber material has its unique resistance towards various chemicals. Polymer used, as well as additives, effect which chemicals each rubber material is suitable for. Heat Exchanger Ontario compounds rubber materials for optimum performance.

High Temperature
At high temperatures the rubber will be attacked faster by the chemicals in use, and the surrounding oxygen. The oxidation process will either make the rubber harder (the most common one) OR make it softer (less common), OR both at the same time. Either way the change in properties will reduce the performance. All rubber materials have a maximum continuous temperature, which should not be exceeded to maintain good performance and to achieve a reasonable lifetime.

Low Temperature
At low temperatures the stiffness increases, and the elasticity decreases. This influences the sealing force of the gaskets. All rubber materials have a certain lowest temperature that must be exceeded to be able to perform well enough as a gasket.

Food Applications
For food applications there are demands according to national standards. The usual one for PHE gaskets is FDA (USA).

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