EXPANSION VALVE – Detailed Product Description
Product Name: A/C Expansion Valve
Type: Thermostatic Expansion Valve (TXV / TEV)
Fit For: TYT (Toyota), Honda, Nissan, Mitsubishi, Isuzu, Hyundai, Kia, Mercedes‑Benz, BMW
1. Core Functions
The expansion valve is the
precision control component of the automotive air conditioning system:
- Meters & controls refrigerant flow into the evaporator core
- Reduces high‑pressure liquid refrigerant to low‑pressure, low‑temperature liquid
- Adjusts flow automatically according to evaporator outlet temperature
- Prevents liquid refrigerant from entering compressor (protects compressor)
- Optimizes cooling efficiency and stabilizes cabin temperature
- Works with evaporator, compressor, and condenser for complete A/C cycle
2. Product Design & Construction
Structure & Components
- Valve Body: Brass or high‑grade aluminum alloy
- Diaphragm & Power Head: Sensitive temperature‑responsive diaphragm assembly
- Sensing Bulb: Capillary tube with heat‑sensitive gas for accurate temperature detection
- Valve Orifice: Precision‑machined metering orifice for stable flow control
- Spring: Adjustable pressure spring to set superheat value
- Seals: High‑performance O‑rings resistant to R134a / R1234yf refrigerants and oil
Performance Features
- Precise refrigerant metering
- Fast response to temperature changes
- Stable superheat control
- Leak‑proof structure
- Corrosion resistant
- Wide operating temperature range: -40°C to +150°C
- Compatible with R134a and R1234yf refrigerants
3. Installation Guide
- Recover refrigerant from the A/C system before disassembly.
- Locate the expansion valve at the inlet of the evaporator core.
- Disconnect refrigerant lines and remove the old valve.
- Clean the mounting surface on the evaporator.
- Install new O‑rings lubricated with PAG oil.
- Mount the new expansion valve and tighten to correct torque.
- Attach the sensing bulb securely to the evaporator outlet pipe.
- Evacuate the system, recharge with oil and refrigerant.
- Check for leaks and test cooling performance.
4. Key Partner Factories
Our expansion valves are supplied by global top‑tier OE manufacturers:
- DENSO (Japan) – OE supplier for TYT, Honda, Lexus
- Valeo (France) – OE for European vehicles
- EGELHOF (FRANCE) – Professional A/C system components
- SANHUA (CHINA) – Famous global HVAC control parts brand
- Guangzhou AC Parts Group (China) – Aftermarket production with IATF 16949 certification
5. Quality & Warranty
- Certification: ISO 9001, IATF 16949, CE, E‑Mark
- 100% pressure and leakage test before shipment
- Precision flow calibration test
- THT BRAND Warranty: 12 months / 20,000 km
6. Market Application
High demand in global aftermarket:
- Southeast Asia
- Middle East
- Russia & CIS
- South America
- Africa
- Repair shops, distributors, fleet companies
![Mercedes-Benz - M-Class (W164) - ML 300 4-matic (164.182) [M 272.945] (2010.03 - 2011.12) A/C EXPANSION VALVE OEM 1648300084 A 164 830 00 84 FUJIKOKI VDE-20QTEX-FKS](https://cdn1.npcdn.net/images/a771a3e83aab3c2258f0e84cdb863b73_1766048284.webp?md5id=eac626340b6ff134e38fc5b7b1f14974&new_width=1000&new_height=1000&w=1706259752&from=jpeg&type=9 "Mercedes-Benz - M-Class (W164) - ML 300 4-matic (164.182) [M 272.945] (2010.03 - 2011.12) A/C EXPANSION VALVE OEM 1648300084 A 164 830 00 84 FUJIKOKI VDE-20QTEX-FKS")
