EMP TK4 Thermal System

EMP’s TK4 is a four-fan system capable of rejecting up to 290,000 Btu/h. Each system is ideal as a primary cooling unit for various types of small equipment, or as a supplemental cooler on larger vehicles to eliminate overheating issues and improve vehicle performance and fuel efficiency.

EMP TK4 Thermal System
Max. Coolant Flow Rate

100 gpm

Max. Operating Pressure

20 psi

Max. Coolant Temperature

230° F

Shroud Material


Fan Configuration

Push or Pull

Coolant Capacity

4.3 Gal


12 or 24 Volts

Inlet/Outlet Hose Size

2 inches

High performance cooling
that comes as standard

TK4 systems feature EMP Brushless Electric Fans. Temperature controlled systems also feature an EMP uTMC system controller. Models are available in both 12 and 24-volts, pusher and puller configurations. Control strategy can be configured as temperature control, CAN/J1939, PWM, or On/Off. UL and CSA approved versions are available.

Max. Heat Rejection Rate (14 V)

240,000 Btu/h

Control Inputs

Thermistor, CAN/J1939, PWM or On/Off

Max. Heat Rejection Rate (28 V)

290,000 Btu/h

Heat Exchanger Material


Variable Speed

Fans on temperature controlled TK4 coolers are speed controlled by the uTMC controller based on coolant temperature feedback. This allows for optimal thermal management and little fluid temperature variation, while also helping to prevent heat exchanger clogging in dirty environments. Fan speed on PWM and CAN controlled models can be configured by the customer.

Aluminium Heat Exchanger

Heat exchangers on TK4 coolers are fabricated from an aluminium alloy that has been proven by numerous tests to be superior to copper-brass construction in durability and efficiency, while also weighing less.

Increased Available Engine Horsepower

Any engine power used for cooling is directly subtracted from the horsepower available for driving the wheels, hydraulics, PTOs, etc. TK4 electric coolers manage coolant temperature while consuming much less power than a system cooled by a belt-driven fan or hydraulic fan.

Optional Integrated Wire Harness

Temperature controlled TK4 systems come with an integrated wiring harness assembly that will not break down or degrade when exposed to petroleum based fluids and glycol. Harnesses are built using connectors and interface terminals that are IP69k rated waterproof and dustproof. Wiring is routed and secured per IPC-A-610D section 4.5 class 2, and all terminals are crimped per SAE/CAR-21 sec. 4.4.


TK4 coolers come in both 12 and 24-volt versions to allow for easy installation on most vehicles by eliminating the need for an auxiliary power circuit. Units are also available in both pusher and puller configurations to maximize mounting location adaptability. Control strategy and fan speed can be configured as variable-speed temperature control, custom-speed PWM or CAN control, or single-speed on/off. UL and CSA approved TK4 versions are available upon request.


Enquire about the EMP TK4 Thermal System

If you would like to learn more about the capabilities of the EMP TK4 Thermal System, then please fill in the contact form below and one of the team will get back to you to answer any questions you may have.

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