Danfoss upgrades CO2 EEVs
25th October 2025
DENMARK: Danfoss has announced an enhanced and a completely new electric expansion valve for CO2 installations.
The new ETS 5T features the same compact design as Danfoss’ ETS 5M, which Danfoss claims is the smallest electronic expansion valve on the market. The 5T version is designed for CO2 applications from 4kW to 19kW, has a maximum working pressure of 140bar and a maximum operating pressure differential of 120bar for transcritical CO2 systems. It supports a refrigerant temperature and ambient temperature range range from -40ºC to 80ºC.
The ETS 5T also supports bi-directional flow, operating at full performance in normal and reverse flow directions.
Danfoss has also made enhancements to its existing ETS 5M valve. With its compact form and wide range of orifice sizes, the upgraded ETS 5M can work even with smaller systems.
The upgraded 5M supports a max working pressure of up to 49bar, a maximum operating pressure differential of up to 42bar, in both flow directions, and a temperature range of -40ºC to 80ºC. It’s also said to be corrosion and vibration resistant
Danfoss has also added a bipolar coil extension which is said to offer the higher performance level as a unipolar coil, while using the same current. The new coil has a lower heat loss, which extends the valve’s lifetime, and it’s compatible with our EKF and EKE 100 stepper valve SH controllers and drivers.
The 5M valve now comes with 0.8 and 1.0 orifices, which are ideal for residential heat pumps, cold rooms and transportation refrigeration. It is also suitable for A1, A2 and A3 refrigerant applications and is expected to attain UL certification by the end of 2025.
Both are said to be easier to install with its clip and turn fixation. The connector has a bi-metal design, which means installers don’t need to cool the valve body during installation.
