Liquid Cooling Solutions, the Best Choice for Complete Plant-wide Machine Cooling


When it comes to Thermal Management, cooling each machinery or electrical cabinet separately is usually the solution chosen by most of the industries. However, this leave a valuable optimization potential untapped.

Maximum efficiency cooling for a whole system can be achieved with a cooling system solution consisting of air to water heat exchangers and water-based chillers. These ‘Liquid Solutions’ cool the complete assembly and offer significant benefits compared to traditional approaches such as cooling with ambient air.

How does it work?

A closed loop cooling or semi open system is used to provide cooling to the entire plant assembly. These might be electrical enclosures, processes or individual machine parts such as spindles, motors or hydraulic equipment.

Liquid Cooling Solutions

In a closed-loop system, electrical enclosures or assemblies are cooled with cold water at a specified inlet temperature which is pumped through a pipe system. Flowing through the electrical enclosures or assemblies, the water is warmer when it returns to the chiller. This creates a temperature delta which the chiller equalizes by cooling the water from the outlet temperature down to the inlet temperature.

The process chiller system feeds cold water into the application inside the factory hall or outdoors and the constant flow temperature significantly improves machine availability and machining accuracy. There is no other cooling media being as efficient as water cooling.

The best Liquid Cooling Solution: Combined Chillers and Air to Water Heat Exchangers

The combination of application-specific process chillers with air to water heat exchangers is particularly suitable for applications in which heat must not be dissipated in the immediate environment, where the ambient air is too aggressive to allow the use of traditional enclosure cooling units, where high-level protection is required (up to IP 65) or where the cooling devices must be maintenance-free.

The air to water heat exchanges are all cut-out-compatible and fit in the housing of all available electrical enclosures. This means that machine and plant manufacturers, end users and distributors benefit from higher flexibility, and save costs on warehousing and servicing.

The advantage of an intelligent system solution with application-specific chillers and air to water heat exchangers is that the dissipated heat can be moved directly from the factory shop floor via air channels or an outside chiller system. It also offers very high reliability and problem-free operation as all the components of the system are chosen to work together perfectly. Low maintenance, cut-out-compatibility and energy efficiency optimize energy consumption and keep operating costs to a minimum. The integrated concept and numerous options allow the system to be adapted to almost any application, even with changing conditions.

Application-specific configuration

Pfannenberg’s experts work with their customers to develop application-specific chiller systems. To achieve exactly the right configuration, it is essential to:

  1.  First determine the heat load for the whole assembly.
  2. The second step is to specify the type of cooling medium (ideally water), the target temperature and the flow quantity which the system must deliver in the actual application. This process should take into account how the heat is transmitted to the cooling medium and the type of refrigerant necessary to operate the refrigerant circuit. The type of cooling medium and which chiller model is used depends on whether usable process water is available at the factory and if so, whether it is warm or cold (see overview of device variants).
  3. An analysis of the environmental conditions prevailing where the chiller system is to be installed is also carried out. For example, there might be high temperatures and contaminated air indoors, while outdoors the temperature might fluctuate widely. Both of these factors can have an impact on the configuration of the chiller system, making accessories such as filter fans or crankcase heating necessary. Taking the temperature of the cooling medium at the inlet and the highest likely ambient temperature as a basis, Pfannenberg determines the best chiller model with the correct characteristic curves for the job.
  4. The final stage in the application-specific configuration is to think about whether the selected standard version meets the other requirements of the application, such as performance data, control and regulation options, available space, certifications and color. It is then decided whether standard options are necessary or helpful and if so, which. With numerous available options available, the EB chillers meet the requirements of practically any application in industrial environments.

Pfannenberg offers installation-ready chiller systems with performance specifications ranging from 1 to 160 kW. The modular concept of the EB series allows users to select from up to 30 standard options. These include hydraulic bypass/relief valves, flow monitors, tank level monitors, air filters, air filter monitors, check valves, solenoid valves, single alarm display and UL certification. Special solutions are also available. Click here to determine the correct chiller for your application!


With products that include filterfans, heaters, industrial air conditioners, air to water heat exchangers, packaged chillers, and signaling devices, Pfannenberg offers a full range of thermal management solutions for all types of industries. Standard options such as stainless steel materials, NEMA 4/4X enclosures, and washdown duty construction allow these time-tested products to be seamlessly incorporated into even the most demanding applications.

Have a question regarding which equipment is best for your application? Ask Us Here.

Topics: Air Water Heat ExchangersEnclosure CoolingThermal ManagementWater Cooling,Packaged ChillersChillers

Closed Loop Liquid Cooling Reduces Downtime, Maintenance & Repair Costs for Commercial Bakeries


Pfannenberg’s Cooling Solutions Help Keep Equipment Running for One of the Fastest Growing Independent Wholesale Bakers in America.

Flour is one of the paramount enemies of electrical enclosures and enclosure air conditioners, particularly in the make-up area of a commercial bakery.

 Pfannenberg is your proven partner for complex thermal management challenges in the baking industry. High security classes of equipment and corrosion-resistant construction materials resist even the most difficult ambient conditions.

Keeping the electronics cool which power the machines is essential to the entire operation of the Schwebel Baking Company. Without the electrical enclosures staying cool, the machines fail and require replacement or downtime for repair. Inside a baking facility, there is lots of dust/flour throughout the air and can clog the operating machines.

Pfannenberg’s PWS Series Air to Water Heat Exchangers were the precise solution for Schwebel’s manufacturing process. Incorporating closed loop cooling with Air/Water Heat Exchangers improved performance, reduced maintenance, was energy efficient, and prevented unplanned repairs.


Click Here to Download the Bakery Air to Water PWS Case Study.


Be sure to follow our  Food and Beverage LinkedIn Showcase Page!

Topics: Thermal ManagementNorth AmericaFood & BeverageCommercial BakeriesBakery,Case Study

Pfannenberg Signaling Devices Help Protect the World Largest Cruise Ship


Photo source: Royal Carribean Press Center

‘Harmony of the Seas’, the World Largest Cruise Ship ordered by Royal Carribbean and constructed by STX France is finally ready to host its first passengers, after 36 months construction. As the only MED Certified Signaling Device manufacturer we are pleased that STX chose Pfannenberg’s PATROL Signaling Devices to be installed on this sea giant.Innovative attractions such as the highest sea slide have been designed for the 6,700 passengers that can accommodate this 1,187 ft long and 230 ft high floating city as “The Ultimate Abyss”.

The ship also features 20 restaurants, 23 swimming pools, many shops, a mini golf, surfing simulators, a ‘Central Park’ with 10,000 plants and a theater with 1,400 seats!

The best technologies will also be used on the ship such as a bionic bar, RFID wrist bands, iPad check in and high-speed internet which will definitely change the way we enjoy vacations at sea.


Royal Carribbean crew members and passengers can also count on Pfannenberg’s best Signaling Technology for their onbard protection with our 200 PATROL Signaling Devices already installed in various areas of the ship.

These MED Certified, modern, visual and audible signaling devices are used in all technical areas of the ship such as utility rooms, kitchens, storage rooms and machine rooms. Pfannenberg’s PATROL Signaling devices will ensure the 6,700 passengers’ safety against fire and CO2 threats.


Pfannenberg PATROL range of Signaling devices include a standard 10-Year Warranty, guaranteed to protect man, machine and the environment:

PATROL Sounders – versatile audible alarms:

  • 80 pre-programmed tones, up to 4 different even
  • Superior sound penetration and coverage
  • Operates in harsh environments
  • Fast, easy and safe to install
  • Can be surface-mounted or flush-mounted.

PATROL Flashing Sounders – combined audible and visual alarms:

  • Enhance safety with alarms that are seen and heard.
  • Utilize flashing strobes with higher energy/visibility.
  • 80 pre-programmed tones, up to 4 different events
  • Separate control of horns and strobes
  • Superior sound penetration and coverage
  • Operates in harsh environments
  • Fast, easy and safe to install

Click here to view our Marine Industry Datasheet.

Click here for more information about MED certification and to discover our certified Marine Fire Alarm Systems.

Pfannenberg, Inc. is a global manufacturer of Signaling Technologies, Thermal Management, and Liquid Cooling Solutions.

Pfannenberg is proud to provide solutions as a single source to its customers. Our business philosophy – Protection for man, machine and the environment

Topics: Industrial Safety & Signaling Solutions

Pfannenberg’s PATROL Alarms are the ONLY MED approved devices worldwide


As of May 26 2016, Pfannenberg is the ONLY Marine Equipment Directive approved manufacturer worldwide.

On board safety is mandatory and the quality of installed Signaling Devices is key to avoid risks of injuries whatever the conditions. Pfannenberg is proud to be the only manufacturer whose product quality is certified by the Marine Equipment Directive. This certification is also valid in the US with the Mutual Recognition Agreement (MRA) for testing and approvals according to the 96/98/EC Directive.


What is the MED Marine Approval?

The MED Mark of Conformity confirms that a product or piece of equipment is approved for use on board EU member state ships and ships of countries which have agreed to apply the Marine Equipment Directive 96/98/EC. This is sometimes referred to as the ‘wheelmark’ or ‘wheel mark’ and also known as M.E.D/MED approval or certification. It provides confirmation that the equipment or product is suitable for marine industry use. Its purpose is:

  • To enhance safety at sea
  • To improve the protection of the marine environment
  • To facilitate free trade of marine equipment within the European Union while maintaining a common safety level.

All approved and authorized products are stored in the MarED database which contains information about over 35,000 authorised devices. Pfannenberg Signaling Devices are the ONLY devices stored in the MarED database for the Fire Alarm Category. Products are tested by an independent third party, for use in the marine environment before being granted an approval certificate.


Our certified Signaling Devices

Pfannenberg offers an extensive range of products and solutions designed specifically to withstand the requirements of the marine industry.

Pfannenberg PATROL PA sounders and PA X combined sounders/beacons are MED certified by Germanischer Lloyd (a Notified Body under the terms of the MED) who has confirmed that these products meet the requirements of the directive. Pfannenberg’s MED certified visual and audible devices include the following:

Click here to view our MED Certificate
Click here for more information about Pfannenberg’s MED Certified devices


You can rely on Pfannenberg products whenever you need fire protection alarm devices, such as sounders or visual and audible combination units, for ship and marine applications.

Pfannenberg is proud to provide solutions as a single source to its customers. Our business philosophy – Protection for man, machine and the environment.

Topics: Industrial Safety & Signaling Solutionsboat alarms