Products Description
| Product Name | Carrier ETS250 (034G2602) Electronic Expansion Valve |
| Model | ETS250 (034G2602) |
| Applicable Industries | Construction and Commercial |
| Application | Refrigeration compressor |
| Packaging | Cardboard Box |
| MOQ | 1 Piece |
Installation and Precautions:
Before cutting the copper piping of the old valve body, shut down the unit, recover the refrigerant, and fully depressurize the system; brazing under pressure is strictly prohibited.
During welding, the stepper motor drive head must be completely wrapped in a wet towel; high temperatures can damage the insulation of the internal windings.
Replace the filter-drier whenever the valve body is replaced to remove metallic impurities from the system and prevent the new valve core from jamming.
Ensure the M12 waterproof wiring harness connector is fully locked; unit vibration can easily cause loose connections and erratic valve regulation.
After assembly, evacuate the system, charge it with the standard amount of refrigerant, power on the unit, and execute the EXV zero-point automatic calibration procedure.
Strictly observe model selection requirements: high-capacity units (180 RT and above) must use model 034G2602; substituting the low-flow model 034G2600 is prohibited.
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Technical parameter
Company Profile
Factory Profile
| Q1:For refrigeration industry, which brands are your products covering? | A1:We produce filter element replacements for brands like,Bitzer, Carrier, York, McQuay, Trane, etc… |
| Q2:Does the price include freight? | A2:The quotation is usually the factory price. We can recommend the most economical logistics plan and calculate the freight according to your destination and quantity. |
| Q3:How to ensure product quality? | A3:We have a strict quality control process, and we will carry out multiple inspections before the products leave the factory to ensure that they meet the standards. |
| Q4:Why choose us? | A4:Product reliability: We are a professional manufacturer . can offer high-quality products at the most competitive prices. Technical support: We provide technical assistance. Industry experience: We have over 10 years of experience in the refrigeration equipment service field. After-sales service: We offer professional after-sales service. Team collaboration: We have a professional team that can provide you with prompt services and delivery schedules. |
Core Product Functions:
1. High-capacity, precision refrigerant throttling matched to high-capacity screw chiller loads
Features 3,810-step fine-resolution opening control; dynamically supplies refrigerant in real-time based on evaporator outlet superheat. Ensures stable superheat control across all operating conditions—from full load to low load—significantly boosting the unit’s IPLV (Integrated Part Load Value) and preventing evaporator icing or cooling capacity degradation.
2. Bidirectional balanced structure ensuring steady flow under variable loads
Automatically balances high and low pressures within the valve chamber; prevents flow fluctuations during low-load or low-chilled-water-temperature operations. Maintains stable pressure curves, reducing the risk of compressor surge and low-pressure protection shutdowns.
3. Power-loss self-locking protection to mitigate compressor liquid hammer risks
The valve core locks upon power loss, preventing a massive backflow of liquid refrigerant into the compressor chamber; this reduces wear and overhaul costs associated with liquid hammer damage to the male/female rotors and bearings.
4. Integrated sight glass to simplify routine maintenance and inspections
Eliminates the need for external service ports; allows direct observation of refrigerant status and system moisture content. Color changes in the indicator provide quick diagnosis of filter-drier failure or system water ingress/acidification.
5. Stepper motor fault self-diagnosis and reporting
Detects stepper motor wire breaks or valve core jams caused by debris; the UCP main controller reports an “EXV STEPPER FAULT” code, enabling rapid localization of throttling system faults.
6. Adaptive regulation across a wide operating range
Automatically matches refrigerant supply to conditions ranging from high-temperature full-load summer operation to low-temperature/low-flow winter operation and variable-flow water systems; offers a regulation range far exceeding that of traditional thermostatic expansion valves.
