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Expansion Valve 14-00445-01 – Thermal Expansion Valve for Carrier Transport Refrigeration Units | R134a/R404A/R452A
- Overview
- Recommended Products
- Sensing bulb on the suction line reads refrigerant temperature after the evaporator.
- External equalising line reads true evaporator outlet pressure – not the header pressure.
- The valve throttles to hold target superheat: wide open on pull-down, closed down at part load.
- Result: maximum evaporator efficiency without liquid flood-back risk.
- Superheat drifting or stuck at one value regardless of load – charge loss in the bulb.
- Evaporator frosting unevenly – one section flooded, one starved.
- Compressor liquid slugging noises – valve failing open.
- System short-cycling on low pressure – valve failing closed.
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The Metering Brain of the Cooling Cycle
The expansion valve (TXV) is the precision component that meters liquid refrigerant into the evaporator. It is what turns a compressor's raw pressure into the controlled superheat that protects the evaporator from flooding and the compressor from liquid slugging.
The 14-00445-01 is an externally-equalised thermal expansion valve – the configuration Carrier uses on its transport refrigeration units, where evaporator pressure drop varies with load and airflow. External equalisation lets the valve read true evaporator pressure for stable control from full-load pull-down to low-load holding.
Expansion Valve 14-00445-01 – External Equaliser TXV
Technical Specifications
Part number |
14-00445-01 |
Type |
Thermal expansion valve (TXV), externally equalised |
Carrier transport refrigeration units |
|
Refrigerants |
R134a, R404A, R452A |
Sensing element |
External sensing bulb with charge |
Body material |
Brass body, stainless-steel capillary |
Fit |
Direct OEM replacement |
Warranty |
13 months |
14-00410-05 – Same Series
61-6183 – Same Series
How an External-EQ TXV Works
61-6283 – Same Series
66-7532 – Same Series
Signs Your TXV Needs Replacing
SER-DS-10-S – Same Series
Frequently Asked Questions
Q: Which refrigerants work with this valve? A: R134a, R404A and R452A, matching Carrier transport refrigeration charges.
Q: Do I need the sensing bulb charge matched? A: Yes – the 14-00445-01 is supplied with the correct charge for its application range.
Q: Is installation plug-and-play? A: Direct OEM fit; retain the bulb insulation and correct sensing position during installation.
Q: Warranty? A: 13 months.
Contact & Ordering
Hunan Weili Auto Parts Appliance Co., Ltd
