ETS 50 (034G0507) Danfoss Electric Expansion Valve

Product Overview

The ETS 50 (034G0507) is a high-precision, electronically operated expansion valve (EEV) engineered for the precise injection of liquid refrigerant into evaporators for air conditioning and refrigeration systems. As a critical component in high-efficiency B2B thermal management solutions, the Danfoss 034G0507 (034G0507) utilizes a bipolar stepper motor to provide accurate mass flow control, which is essential for optimizing Superheat (SH) and reducing energy consumption. Its native bi-flow capability makes it an ideal solution for heat pump applications, providing equally accurate regulation in both heating and cooling modes. By integrating this valve, facility operators can ensure stable system performance and significantly reduce the risk of compressor damage due to liquid slugging.

Technical Configuration

The technical architecture of the 034G0507 is centered on a balanced internal design that ensures linear flow characteristics across its entire operating range. The valve is driven by a precision bipolar motor that translates electronic pulses from a controller into high-resolution needle positioning. This configuration includes a factory-installed 2 meter (6.6 ft) cable and is rated to IP67 standards, ensuring complete protection against dust and moisture ingress—a necessity for refrigeration environments prone to heavy condensation. The hermetically sealed design is compatible with a wide range of refrigerants (HFC/HCFC), making it a versatile choice for modern industrial HVAC-R systems requiring fast response times and stable pressure regulation.

Technical Specifications

Technical FAQs

How does the Bi-flow design benefit reversible systems?

The bi-flow design allows the ETS 50 to maintain identical flow characteristics and accuracy in both directions. This eliminates the need for separate expansion valves and bypass check valves in heat pump circuits, simplifying the piping architecture and reducing potential leak points.

What control signal is required for the 034G0507?

This valve requires a bipolar stepper motor driver (such as the Danfoss EKD or EKE series) capable of providing the correct phase current (typically 100 mA RMS) and a total of 2625 steps for full stroke operation.

Is this valve suitable for low-temperature applications?

Yes, with an operating range down to -40 Celsius and an IP67-rated actuator, the 034G0507 is specifically designed to handle the frost and moisture conditions common in low-temperature refrigeration and industrial chilling.

Engineering & Installation Guide

• Thermal Protection during Brazing: During the installation process, it is mandatory to wrap the valve body in a wet cloth. The internal temperature must be kept below 100 Celsius to prevent permanent damage to the precision stepper motor and the internal needle assembly.

• Mounting Orientation: For optimal oil management and to prevent refrigerant liquid from pooling in the actuator, mount the valve with the motor housing in a vertical position (upward). Ensure the 2 meter cable is routed with a drip loop to prevent moisture from traveling toward the actuator seal.

• Controller Calibration: Upon initial commissioning, the electronic controller must perform a full stroke initialization to calibrate the zero point. Ensure the controller settings match the Danfoss motor drive specs to prevent missed steps or overheating of the bipolar coils.