EXPANSION VALVE – Detailed Product Description

Product Name: A/C Expansion ValveType: Thermostatic Expansion Valve (TXV / TEV)Fit For: TYT (Toyota), Honda, Nissan, Mitsubishi, Isuzu, Hyundai, Kia, Mercedes‑Benz, BMW

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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

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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

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3. Installation Guide

1. Recover refrigerant from the A/C system before disassembly.
2. Locate the expansion valve at the inlet of the evaporator core.
3. Disconnect refrigerant lines and remove the old valve.
4. Clean the mounting surface on the evaporator.
5. Install new O‑rings lubricated with PAG oil.
6. Mount the new expansion valve and tighten to correct torque.
7. Attach the sensing bulb securely to the evaporator outlet pipe.
8. Evacuate the system, recharge with oil and refrigerant.
9. Check for leaks and test cooling performance.

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4. Key Partner Factories

Our expansion valves are supplied by global top‑tier OE manufacturers:

1. DENSO (Japan) – OE supplier for TYT, Honda, Lexus
2. Valeo (France) – OE for European vehicles
3. EGELHOF (FRANCE) – Professional A/C system components
4. SANHUA (CHINA) – Famous global HVAC control parts brand
5. Guangzhou AC Parts Group (China) – Aftermarket production with IATF 16949 certification

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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

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6. Market Application

High demand in global aftermarket:

• Southeast Asia
• Middle East
• Russia & CIS
• South America
• Africa
• Repair shops, distributors, fleet companies