C1-19 Fojikuki Thermostatic Expansion Valve E5045QWEX-1 for Medium Bus AC

The C1-19 Fojikuki E5045QWEX-1 thermostatic expansion valve is an original Japanese refrigeration spare part customized for 8–10m medium bus and shuttle air conditioning systems. As one of the four core components of vapor compression refrigeration cycle, it is installed between condenser and evaporator, completing refrigerant pressure reduction and automatic flow regulation, which directly affects cooling stability and compressor service life of medium bus HVAC units.

High-pressure liquid refrigerant flows into the forged brass valve body, becomes low-temperature atomized refrigerant after throttling and enters the evaporator to absorb cabin heat. The long copper capillary sensing bulb tracks evaporator outlet superheat in real time, dynamically adjusting valve opening to match cooling load, effectively preventing evaporator frosting and liquid backflow that causes compressor damage.

Core Product Advantages

1. Authentic Japanese Fojikuki Precision Manufacturing

   Produced under Fojikuki strict automotive HVAC quality standards, ultra-precision internal valve core delivers ultra-stable flow adjustment, no performance attenuation under long-term continuous high-load operation, well-known for long service life in bus aftermarket.

2. Integrated Anti-Corrosion Forged Brass Valve Body

   One-piece forged brass valve body with anti-rust coating, outstanding pressure resistance and sealing performance, effectively avoid refrigerant leakage caused by vehicle bump vibration and high system operating pressure.

3. High-Sensitivity Long Capillary Temperature Sensing System

   Extended copper capillary tube with large-area sensing bulb quickly responds to temperature changes, automatically increases or decreases refrigerant supply under high temperature summer or low passenger load, ensuring even temperature distribution inside medium passenger cabin.

4. Optimized Anti-Vibration Fixed Structure

   Reinforced clamping design for capillary and sensing bulb, withstand long-distance highway bump vibration, suitable for all-region road operation from tropical high-temperature to cold plateau areas, working temperature range -20℃ ~ 60℃.

5. 1:1 Original Size Plug-and-Play Replacement

   All pipe interface size, capillary length and mounting dimensions fully consistent with Fojikuki E5045QWEX-1 factory specifications. No pipeline cutting, bending or secondary modification needed during maintenance, drastically cut repair labor hours and vehicle downtime.

6. Compatible With R410A Eco-Friendly Refrigerant

   Perfectly matched with R410A environmental refrigerant widely adopted on new energy medium buses, complies with international HVAC environmental protection and refrigerant emission regulations.

Application Scenarios

• 8–10m medium city bus, campus shuttle bus rooftop air conditioning units

• Short-distance tourist coach refrigeration system overhaul & Fojikuki valve replacement

• Bus repair shop Japanese brand expansion valve dedicated spare parts stocking

• Medium bus OEM factory original Fojikuki refrigeration matching accessories procurement

• Global aftermarket one-stop medium-duty bus HVAC spare parts supply

With 39 years of professional bus HVAC manufacturing experience, TCHAIN supplies genuine Japanese Fojikuki series expansion valves as well as Danfoss, Emerson throttling spare parts. We support bulk wholesale, technical parameter drawing provision and fast worldwide delivery, helping fleet operators reduce maintenance downtime and spare parts procurement cost.