C1-40 TENZ5# Expansion Valve Spool Core for Bus AC Thermostatic Valve

The C1-40 TENZ5# expansion valve spool core is the precision inner throttling component of TEN series bus thermostatic expansion valves. As the key movable part controlling refrigerant flow inside the valve body, it directly determines the accuracy of superheat regulation and the overall cooling stability of the bus air conditioning refrigeration system.

Long-term friction, refrigerant impurity erosion and vibration wear will cause the original spool to deform or leak, resulting in unstable cooling, evaporator frosting or insufficient cooling capacity. Replacing only the TENZ5# spool core can completely repair faulty expansion valves, greatly cutting maintenance cost compared with replacing the entire valve assembly.

Core Product Advantages

1. Precision One-Piece Machining Tolerance Matching

   Produced by high-precision CNC machining, the dimensional tolerance fully matches TEN series expansion valve inner cavity, zero gap fit after installation, no refrigerant bypass leakage inside the valve body.

2. High Wear-Resistant Metal Material Treatment

   Surface wear-resistant hardening process improves anti-erosion performance against impurity particles in refrigerant, extend service life and reduce repeated repair frequency for fleet vehicles.

3. Integrated Sealing Gold-Plated End Design

   Brass gold-plated sealing head fits tightly with valve body inner sealing ring, eliminate internal leakage caused by aging spool end, restore original throttling precision of the expansion valve.

4. Cost-Effective Localized Repair Solution

   Instead of purchasing a complete brand-new expansion valve, just replace the damaged TENZ5# spool core, drastically lower spare parts procurement expenditure for repair shops and bus fleets.

5. Universal Compatibility For TEN Series Bus Valves

   Standard TENZ5# specification compatible with most TEN type thermostatic expansion valves widely equipped on medium and large bus rooftop AC units, unified stocking reduces spare part inventory categories.

6. Easy On-Site Replacement Operation

   Standard uniform size design, no special custom tools required during maintenance, technicians can finish spool disassembly and replacement quickly to shorten vehicle downtime.

Application Scenarios

• Repair aging, leaking or deformed TEN series expansion valves on 7–12m city buses and tourist coaches

• Bus fleet daily HVAC routine maintenance, low-cost valve internal component replacement

• Bus repair shop universal expansion valve core spare parts centralized stocking

• OEM factory supporting matching repair accessories for complete expansion valve assembly

• Global aftermarket one-stop bus air conditioning refrigeration small repair parts supply

With 39 years of professional bus HVAC manufacturing experience, TCHAIN supplies full range of expansion valves and matched internal repair spare parts including C1-40 TENZ5# spool core. We support bulk wholesale, technical matching consultation and fast worldwide delivery to help you control vehicle maintenance cost efficiently.