Products Description
| Product Name | Trane VAL12003 Stepper Motor Electronic Expansion Valve |
| Model | VAL12003 |
| Applicable Industries | Construction and Commercial |
| Application | Refrigeration compressor |
| Packaging | Cardboard Box |
| MOQ | 1 Piece |
Trane VAL12003 Electronic Expansion Valve: Core Functions
1. Precise Throttling and Pressure Reduction (Core of the Refrigeration Cycle)
Throttles high-pressure liquid refrigerant (2.0–3.5 MPa) into low-pressure, low-temperature wet vapor (0.4–0.8 MPa), precisely matching the evaporator’s requirements for low-pressure evaporation and heat absorption;
Features multi-stage throttling combined with a smooth valve port design to minimize refrigerant flashing and noise, thereby enhancing heat exchange efficiency and achieving 8–15% greater energy savings compared to thermal expansion valves.
2. Dynamic Flow Regulation (Core of Load Adaptation)
The main controller calculates the precise valve opening position (ranging from 0 to 500 steps) in real-time, based on suction pressure, discharge temperature, superheat, and chilled water outlet temperature;
Offers a wide range of flow regulation (5–100% capacity), perfectly matching the 25–100% partial-load operating requirements of screw compressors and preventing frequent start-stop cycles;
Liquid Slug Protection: At low loads, the valve maintains a small, precise opening to control liquid supply, preventing liquid refrigerant from entering the compressor and thereby averting potential damage (such as bearing or rotor burnout).
3. Superheat Closed-Loop Control (Core of System Stability)
Works in conjunction with evaporator outlet temperature sensors and suction pressure sensors to maintain precise closed-loop control of superheat within a range of 3–8 K (adjustable);
If superheat is too high → the valve opening increases to boost liquid supply and enhance cooling capacity; if superheat is too low → the valve opening decreases to reduce liquid supply and prevent liquid slugging;
Features rapid response capabilities (≤200 ms) to effectively adapt to sudden load changes, ambient temperature fluctuations, unit start-ups, shut-downs, and other dynamic operating conditions.
4. System Protection and Reliability (Core of Safety)
Built-in Valve Position Feedback: Transmits the current valve opening position to the main controller in real-time; performs self-diagnostics for faults (such as jamming, step loss, or motor failure) and triggers corresponding alarms;
Bi-directional Sealing & Corrosion-Resistant Body: Constructed from forged brass with PTFE seals, compatible with a wide range of refrigerants; offers superior leak prevention, aging resistance, and a service life of ≥10 years;
Power-Loss Self-Protection: Maintains the current valve position (without losing steps) during power outages; automatically resumes normal operation upon power restoration, requiring no manual recalibration.
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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. |
Product Structure and Design Advantages
1. Stepper Motor Drive (High Precision): Features a 48V stepper motor with a full travel range of 500 steps and 1-step fine-tuning capability; control precision far exceeds that of traditional thermal expansion valves (achieving ±0.5°C superheat control).
2. Forged Brass Valve Body (Pressure-Resistant and Leak-Proof): Integrally formed with no welded seams; rated for a pressure resistance of 4.5 MPa, effectively preventing refrigerant leakage and withstanding vibration—making it ideally suited for the harsh operating conditions found in equipment rooms.
Smooth Valve Port + Low-Noise Design: Incorporates a streamlined valve needle and seat geometry to minimize refrigerant turbulence and flashing noise, resulting in quieter unit operation (≤65 dB).
Plug-and-Play + Calibration-Free: Factory-matched for seamless integration with Trane main controllers; automatically detects valve position without the need for manual calibration, allowing for complete commissioning within just 10 minutes of replacement.
Wide Temperature & Refrigerant Compatibility: Operates across a broad temperature range of -40°C to +65°C; compatible with all mainstream eco-friendly refrigerants and suitable for both new installations and the retrofitting of existing units.
