Heat Exchangers

Cooling of liquids



Heat exchangers and special applications

Heat exchangers provide optimum temperature exchange

Our product spectrum ranges from plate heat exchangers to tube bundle heat exchangers and air heat exchangers to underwater coolers and electric heaters. In personal exchange with you, we develop optimal solutions with customized products.



Our Products

Tube bundle heat exchanger

General information about shell and tube heat exchangers

Tubular heat exchangers transfer thermal energy from one liquid or gaseous medium to another. With a double-tube version, these two media can be safely separated from each other. The design of these heat exchangers makes them very robust, so they are also suitable for demanding operating conditions.

Application fields

  • Oil coolers for engines
  • Compressors
  • Lubricating oil systems.
  • Oil coolers for plain bearings (also for self-pumping bearings)
  • Gas preheating


Advantages of shell-and-tube heat exchangers

  • Modular system for optimal thermal matching
  • Safety heat exchanger available
  • Compact design
  • High thermal efficiency
  • Insensitive to back shocks
  • Low pressure drop


Technical features

  Oil volume:  up to 2500 l/min
  Achievable power:  up to 2000 kW
  Pressure stage jacket side:  PN 16 (higher pressure rating on request)
  Pipe side pressure rating:  PN 10 (higher pressure rating on request)


Plate heat exchanger

General information about plate heat exchangers

Plate heat exchangers transfer thermal energy from one liquid medium to a second liquid medium. If required, these heat exchangers can also be supplemented with safety plates, which ensures safe separation of the two media. Plate heat exchangers are available in several designs - allowing them to be adapted to different thermal conditions. Freeflow plate heat exchangers and spiral heat exchangers can also thermally process contaminated media.

Application fields

  • Heating and refrigeration
  • Heat recovery
  • Cooling circuits
  • Process media (also loaded with solids)
  • Waste water and sludges
  • Condensation or evaporation processes


Advantages of plate heat exchangers

  • Variety of technical designs possible
  • Large selection of plate dimensions - optimal adaptation of operating data
  • Safety heat exchangers available
  • Partially and fully welded design available
  • Freeflow-WT for media with solid content - Free media channel
  • Spiral-WT for heavily loaded media (e. g. e.g. sludge)
  • High pressure stability


Technical features

Nominal connection size:DN 25 (1") - DN 700
Plate materials:AISI304, AISI316, AISI316L, AISI316TI, SMO254, titanium, resp. others on request
Sealing materials:NBR, EPDM, FKM, PTFE, copper solder, nickel solder


air heat exchanger

General information about air heat exchangers

These heat exchangers are used to cool liquid media by the ambient air. The air is pulled or pushed over a finned tube bundle by means of a fan. In combination with an oil pump on the motor shaft, a drive can be used to power the fan and pump.

Application fields

  • Oil cooler
  • Water cooler


Advantages of air heat exchangers

  • Compact design
  • Easy installation


Technical features

  Achievable power:  4.4 kW to 140 kW (at 40 °C temperature difference)
  Possible oil volume:  Up to 600 l/min


Electric heaters

General information about electric heaters

Electric heaters are used to heat liquid media. They can be installed as continuous flow heaters in pipelines, heat an entire container content or only the withdrawn quantity. If one combines the electric heater with a pump and fittings, complete preheating units can also be realized.

Application fields

  • Oil preheating
  • Fuel preheating
  • Tank heating
  • District heating - energy coupling (P2H)


Advantages of electric heaters

  • Gentle heating due to low surface load of the heating rods
  • Heating rods for oil and emulsion can be removed from the tank without draining.
  • Deliverable incl. terminal box or with complete control


Technical features

  Achievable power:  up to 1000 kW
  Surface load oil or emulsion:  0.9 - 1.8 W/cm²
  Surface load water:  6 - 8 W/cm²



Submerged water heaters

General information about underwater coolers

With underwater coolers, cooling circuits can be cooled directly by river water. In this case, the cooler is washed by the river water and thus extracts the heat from the cooler water in the pipes. The use of submersible coolers eliminates the need to extract the river water, filter it, pipe it to the heat exchanger, and return it to the river.

Application fields

Cooling circuit in power plants and industrial plants


Advantages of underwater coolers

  • Direct heat transfer from cooling water to river water
  • Space-saving design
  • Individual dimensions
  • Corrosion-resistant materials


Technical features

  • Tube bundle made of CuZn20Al2 with multiple coating
  • Water chamber with connections made of stainless steel



Project Services

With Schmachtl Project Services you are in good hands from the start of your project. 

From the consultation meeting to technical support. We support you so that you can implement your project




1.  Technical consultations:

- For new applications/developments

- Replacement types alternative for existing


2. online/on-site demonstrations/presentations

3. training & continuing education



1.  Process analysis-needs assessment

2.  Feasibility study

3. Conceptual design/planning/


Manufacturing Services

1.  Assembly/assembly

2.  Pre-assembly

3. Insertion

4.  Assembly/installation

5.  Commissioning/calibration

6.  Start-up support/performance check

7. CE conformity assessment

8.  Retrofit: Modernization & Retrofit,

equipment replacement

Ongoing additional services

1.  Service Packages: Maintenance/Repairs

(emergency call for breakdowns)/Monitoring Services

2.  Technical Support

Logistics Services

With our logistics services you have the possibility to choose between different

delivery and storage options. We support you. 


delivery options

1.  Collective deliveries

2.  Demand site deliveries

3. Consignment warehouse

4.  Flexible delivery times

Packaging Solutions

1.  Customized goods


packaging industry

(collective packaging)

2.  Special packaging

Storage options

1.  Frame contracts:

stock in stock


Our partners


Contact us for more information about our products and services. We are happy to assist you.

More information






Oil mist separators