DunAn Automotive Thermal Management

The Electronic Expansion Valve (EXV) automatically regulates refrigerant flow to improve system operating efficiency, achieving rapid cooling/heating, precise control, and energy savings. Orifice diameter can be customized for more flexible system matching. Parameters from the official website (source: https://www.dunan.net/art/2022/2/17/art_648_1999.html): maximum working pressure 3.5 MPa; maximum operating differential pressure 2.1 MPa; nominal capacity 1.5-22 kW@R134a (PL/PH=0.2/1.5 MPaG, SC/SH=5C/10C); applicable ambient temperature -40C to 125C; rated voltage DC12V; voltage range DC9V-16V; full-open pulse count 500; control mode LIN/PWM; excitation mode 1-2 phase; service life >=200,000 cycles. Applicable refrigerants R134a and R1234yf (same vehicle series). Structure/protocol variants: PWM type A, LIN type A/B/C. Note: the official website also showcases derivative star products of this family - the large-bore internally balanced electronic expansion valve FBEV (see the 'Control Valve' family), ultra-quiet electronic expansion valve, vehicle-refrigerator micro-bore electronic expansion valve (0.8 mm), the Linglong series miniaturized electronic expansion valve, and the R290 dedicated valve - all belonging to the electronic expansion valve product matrix.

Maximum working pressure 3.5 MPa; maximum operating differential pressure 2.1 MPa; nominal capacity 1.5-22 kW@R134a; ambient temperature -40C to 125C; rated voltage DC12V (range DC9V-16V); full-open pulse count 500; control mode LIN/PWM; service life >=200,000 cycles; refrigerants R134a/R1234yf

The Thermal Expansion Valve (TXV) senses temperature via a capillary bulb to regulate refrigerant flow, achieving rapid cooling/heating, stable superheat, and energy savings. The solenoid expansion valve (So-TXV) features a built-in solenoid to control fluid on/off, solving the problem that a thermal expansion valve cannot be fully closed. Parameters from the official website (source: https://www.dunan.net/art/2022/2/17/art_648_2001.html): applicable refrigerants R134a, R1234yf; maximum working pressure 3.5 MPa; applicable ambient temperature -40C to +125C; ambient humidity <95% RH; rated voltage 12VDC/24VDC; superheat 4K (customizable); hysteresis <=2K; service life >=200,000 cycles. So-TXV specification table (model/solenoid type/capacity (Ton/kW)/dielectric strength/internal solenoid leakage (ml/min@1.03 MPa)/power/charge): STH07 (normally closed/open, 0.7T/2.5kW, >10MΩ, <=100, <=10W, CG), STH10 (1.0T/3.5kW), STH15 (1.5T/5.3kW), STH20 (2.0T/7.0kW).

Applicable refrigerants R134a/R1234yf; maximum working pressure 3.5 MPa; ambient temperature -40C to +125C; ambient humidity <95% RH; rated voltage 12VDC/24VDC; superheat 4K (customizable); hysteresis <=2K; service life >=200,000 cycles; So-TXV models STH07/STH10/STH15/STH20

The Solenoid Valve (SOV) is used in the discharge circuit, suction circuit, or gas-liquid two-phase circuit of vehicle air-conditioning systems to automatically switch refrigerant on/off and selectively switch among multiple circuits. Parameters from the official website (source: https://www.dunan.net/art/2022/2/17/art_648_2000.html): applicable refrigerants R134a, R1234yf; maximum working pressure 3.5 MPa; applicable ambient temperature -40C to +125C; rated voltage DC12V/DC24V; voltage range 9-16V / 18-32V; humidity <95% RH; power <=10W; service life >=150,000 cycles. Model parameter table (model/orifice diameter mm/flow resistance Kpa/orifice leakage ml/min/minimum opening differential pressure KPa/maximum working pressure MPa/maximum opening differential pressure@9V MPa): CDF16D (Phi16/5/<100/5/3.5/1.5), CDF12D (Phi12/6.5/<100/0/3.5/1.5), CDF12DK (Phi12/6.5/<100/0/3.5/2.5), CDF10D/DK (Phi10/17.5/<100/0/3.5/2.1), CDF06DK (Phi6/6.19/<100/5/3.5/2.1, high-pressure liquid condition), CSF10DT (Phi10/17.5/<100/0/3.5/2.1). Operating conditions: CDF06DK is for high-pressure liquid condition (inlet 1.5 MPa, subcooling 5C, flow 150 kg/h); the rest are for high-pressure gas condition (inlet 1.5 MPa, superheat 20C, flow 150 kg/h). Also includes the vehicle three-way valve solenoid series (CSF10 three-way solenoid valve).

Applicable refrigerants R134a/R1234yf; maximum working pressure 3.5 MPa; ambient temperature -40C to +125C; rated voltage DC12V/DC24V (range 9-16V/18-32V); humidity <95% RH; power <=10W; service life >=150,000 cycles; models CDF16D/CDF12D/CDF12DK/CDF10D/DK/CDF06DK/CSF10DT

The Control Valve family is represented by FBEV (large-bore internally balanced electronic expansion valve) and FBEV-C (R744 control valve), adopting an innovative internally balanced design that combines the functions of an expansion valve and a solenoid valve - large-bore, lightweight, and directly applicable to integrated valve islands; the soft-seal structure further reduces internal leakage (<=50 ml/min@1 MPa). Official website parameters - FBEV (source: https://www.dunan.net/art/2022/2/17/art_648_2005.html): refrigerant R134a, R1234yf; medium temperature -40C to +80C; ambient temperature -40C to +125C; operating voltage DC9V-16V; full-open stroke 640 pulses (0%-100%); operating time <8s (100%<->0%); medium flow direction bidirectional throttling/bidirectional shutoff; communication control LIN2.0/LIN2.1; orifice diameter full-open Phi10 mm (throttling part customizable); flow curve customizable. FBEV-C R744 control valve (source: https://www.dunan.net/art/2022/2/17/art_648_2006.html): refrigerant R744 (CO2); medium temperature -40C to +80C; ambient temperature -40C to +165C; operating voltage DC9V-16V; full-open stroke 500 pulses; operating time <5s; bidirectional throttling/bidirectional shutoff; LIN2.0/LIN2.1; orifice diameter Phi6.0 (customizable); valve body uses metal-gasket hard seal to improve external sealing and supercritical R744 durability. Exhibition supplementary parameters (EAC2026/ATC2026 official reports): FBEV orifice can be expanded to 16 mm, low internal leakage <=100 ml/min, operating noise <35 dB@30 cm.

FBEV: refrigerants R134a/R1234yf; medium temperature -40C to +80C; ambient temperature -40C to +125C; operating voltage DC9V-16V; full-open stroke 640 pulses; operating time <8s; communication LIN2.0/LIN2.1; orifice Phi10 mm (customizable); internal leakage <=50 ml/min@1 MPa. FBEV-C: refrigerant R744 (CO2); ambient temperature -40C to +165C; full-open stroke 500 pulses; operating time <5s; orifice Phi6.0 (customizable); metal-gasket hard seal. Exhibition: FBEV orifice expandable to 16 mm; internal leakage <=100 ml/min; noise <35 dB@30 cm

The Electronic Water Pump (EWP) is a coolant control and power component suitable for new-energy vehicle thermal-management systems. It adjusts flow according to system requirements to meet real-time cooling needs, featuring adjustable speed and real-time fault feedback. The official product tree confirms the electronic water pump series includes DEWP50/DEWP60/DEWP70 (sources: https://www.dunan.net/col/col382/index.html, col383). Composition (source: provincial new-product appraisal expert review / Dunan official introduction): control board, DC brushless motor, impeller, and volute; its function is to raise system working pressure, promote liquid-media circulation, and regulate flow per real-time operating conditions. Technical features: a high-performance sintered NdFeB rotor replaces the traditional injection-molded structure to greatly increase motor power and reduce weight; anti-backlash noise-damping washers and clip structures reduce washer play and running noise. This 'high-power vehicle electronic water pump' has reached an 'internationally advanced' level per provincial new-product appraisal. Note: the official product detail pages (outer dimensions / characteristic curves) do not disclose flow/head/voltage values item by item; refer to the model specification sheet for specifics; the DEWP naming (50/60/70) corresponds to different power grades.

Series DEWP50/DEWP60/DEWP70; composition: control board, DC brushless motor, impeller, volute; adjustable speed and real-time fault feedback; high-performance sintered NdFeB rotor for higher power and lower weight; anti-backlash damping washer and clip structure to reduce noise; rated 'internationally advanced' per provincial new-product appraisal; specific flow/head/voltage per model specification sheet

The Electronic Water Valve (EWV) belongs to the coolant control and power component series, together with the Electronic Water Pump (EWP) forming the core components of the water-circuit system. Officially confirmed (Dunan Environment 002011 investor interactive platform disclosure on 2023-12-08; EAC2026 / 2025 China Automotive Thermal Systems Academic Annual Conference / ATC2026 official exhibition reports): the company's new-energy vehicle thermal-management business main products include electromagnetic expansion valves, large/small-bore electronic expansion valves, electronic water pumps, and multi-port electronic water valves and other key components, applied in the new-energy vehicle thermal-management field, with related products already used in models such as AITO (Wenjie) and Avatr. The official product tree (source: https://www.dunan.net/col/col147/index.html) lists it under coolant control and power components. Note: the official website has not yet set up an independent product detail page; specific orifice/voltage/control method/protection grade etc. are subject to the model specification sheet.

Multi-port electronic water valve; forms the water-circuit core together with EWP; applied in AITO (Wenjie) and Avatr models; orifice/voltage/control method/protection grade subject to model specification sheet

The Intelligent Electronic Control series is an electronic-control component for new-energy vehicle thermal management. The official product tree lists it as an independent product series (source: https://www.dunan.net/col/col376/index.html). Officially disclosed (Dunan Environment 002011 investor interactive platform, 2026-09-03): the company's new-energy vehicle thermal-management business products cover refrigerant-side valves, water-side pumps and valves, OBD intelligent electronic control, etc., widely used in battery thermal-management systems, motor and electronic-control cooling systems, cabin climate-management systems, and engine cooling systems. Dunan Environment's technical advantages extend to 'air-conditioning systems, fluid control, intelligent electronic control, sensors, and heat exchangers.' Note: the official intelligent electronic control series detail page does not disclose voltage/communication/control functions/protection grade item by item; refer to the model specification sheet.

Covers refrigerant-side valves, water-side pumps and valves, OBD intelligent electronic control; applied to battery thermal management, motor/electronic-control cooling, cabin climate management, engine cooling; voltage/communication/control functions/protection grade subject to model specification sheet

The vehicle Check Valve MCV series is suitable for the discharge circuit of vehicle air-conditioning systems, etc., achieving single-direction refrigerant flow and preventing reverse flow, with low flow resistance and low internal leakage characteristics (source: https://www.dunan.net/art/2022/2/17/art_648_2002.html). Official website parameters: applicable refrigerants R134a, R1234yf; ambient temperature -40C to +125C; ambient humidity <95% RH; service life >=200,000 cycles. Model table (model/orifice diameter mm/maximum working pressure MPa/opening differential pressure KPa/internal leakage ml/min): MCV-10-A001 (Phi10/3.5/<=10/<=20), MCV-10-A004 (Phi10/3.5/<=10/<=10, new internal structure with error-proofing pin), MCV-10-A005 (Phi10/3.5/<=10/<=10, new internal structure), MCV-16-A001 (Phi16/3.5/<=10/<=10). Also includes a check valve (type B) in the integrated cartridge valve (source art_648_2004, benchmarked against MCV-10, flow diameter phi10/phi16 mm).

Applicable refrigerants R134a/R1234yf; ambient temperature -40C to +125C; ambient humidity <95% RH; service life >=200,000 cycles; models MCV-10-A001/MCV-10-A004/MCV-10-A005/MCV-16-A001; orifice Phi10/Phi16 mm; opening differential pressure <=10 KPa; internal leakage <=10-20 ml/min

The Combined Valve combines an electronic expansion valve and a solenoid valve in parallel, used for full-flow and throttling function switching in automotive heat-pump systems (corresponding to cooling/heating mode switching), which can reduce system piping and connection points and lower overall cost (source: https://www.dunan.net/art/2022/2/17/art_648_2003.html). Official website parameters: applicable refrigerants R134a, R1234yf; full-closed to full-open pulse count 500; control mode LIN/PWM; rated voltage DC12V; operating voltage DC9-16V; applicable ambient temperature -40C to +125C; service life >=150,000 cycles. Functional component orifice range: expansion-valve part Phi1.0-Phi2.4 mm (refrigerating capacity R134a 1.5-14.2 kW); solenoid-valve part Phi6 mm, Phi10 mm.

Applicable refrigerants R134a/R1234yf; full-closed to full-open pulse count 500; control mode LIN/PWM; rated voltage DC12V (operating voltage DC9-16V); ambient temperature -40C to +125C; service life >=150,000 cycles; expansion-valve orifice Phi1.0-Phi2.4 mm (capacity 1.5-14.2 kW@R134a); solenoid-valve orifice Phi6/Phi10 mm

The Integrated Cartridge Valve includes solenoid valves, electronic expansion valves, and check valves, and can be installed modularly in valve-island form, reducing system installation space and simplifying piping layout (source: https://www.dunan.net/art/2022/2/17/art_648_2004.html). Official website parameters: solenoid valve - benchmarked against solenoid-valve parameters, fixed by threaded locking, O-ring sealed, coil valve-island positioning hole, flow diameter phi12/16 mm; electronic expansion valve - benchmarked against electronic-expansion-valve parameters, fixed by threaded locking, O-ring sealed, coil valve-island M5 screw, flow diameter phi1-3.2 mm; check valve (type B) - benchmarked against MCV-10 check-valve parameters, fixed by thread/retaining ring, externally O-ring sealed and internally O-ring sealed, flow diameter phi10 mm/phi16 mm. Note: the vehicle cartridge solenoid valve has reached an 'internationally leading' level per provincial new-product appraisal (low internal leakage <10 ml/min, MOPD >=2.1 MPa).

Modular valve-island installation; cartridge solenoid valve benchmarked to SOV params, flow diameter phi12/16 mm, threaded lock + O-ring seal; cartridge EEV benchmarked to EXV params, flow diameter phi1-3.2 mm; check valve (type B) benchmarked to MCV-10, flow diameter phi10/phi16 mm; cartridge solenoid valve rated 'internationally leading' (internal leakage <10 ml/min, MOPD >=2.1 MPa)