ETS 50 (034G0501) Danfoss Electric Expansion Valve

Product Overview

The ETS 50 (034G0501) is a high-precision electric 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 034G0501 (034G0501) utilizes a bipolar motor actuator to provide accurate flow control, which is essential for optimizing Superheat (SH) and reducing energy consumption. Its bi-flow capability makes it an ideal choice for heat pump systems, where refrigerant flow directions must be maintained with equal precision in both heating and cooling cycles. By integrating this valve, operators can ensure stable system performance and enhanced protection for compressors against liquid slugging.

Technical Configuration

The technical architecture of the ETS 50 series is centered on a balanced internal design that provides linear flow characteristics. The valve is driven by a precision stepper motor that translates electronic pulses from a controller into precise needle positioning. The 034G0501 configuration features a factory-installed 2 meter (6.6 ft) cable, simplifying integration into control panels. The internal mechanism is hermetically sealed to prevent refrigerant leakage, and the entire actuator assembly is rated at IP67, ensuring reliable operation in high-humidity environments or areas prone to condensation. Its bi-flow flow direction logic ensures that the valve maintains calibrated control regardless of the refrigerant path, a necessity for modern reversible HVAC units.

Technical Specifications

Technical FAQs

What are the advantages of the Bi-flow capability in the 034G0501?

The bi-flow design allows the ETS 50 to regulate refrigerant flow in both directions with the same high degree of accuracy. This eliminates the need for two separate expansion valves and check valves in heat pump circuits, reducing system complexity and potential leak points.

Does this valve require a specific type of controller?

Yes, as a stepper motor valve, the 034G0501 requires a compatible electronic EKD or EKE series controller (or a third-party PLC with a bipolar stepper driver) to provide the necessary pulses for opening and closing the valve.

What is the significance of the IP67 enclosure rating?

The IP67 rating ensures the actuator and cable connection are completely dust-tight and protected against the effects of temporary immersion in water. This is vital for refrigeration applications where heavy frost and subsequent defrost cycles create a high-moisture environment.

Engineering & Installation Guide

• Brazing Safety: During installation, it is imperative to use a wet cloth to wrap the valve body and keep the temperature below 100 Celsius. Excessive heat during the brazing process can damage the internal needle assembly and the stepper motor magnets.

• Mounting Orientation: For the most reliable oil return and to prevent refrigerant liquid from pooling in the actuator, mount the valve with the motor housing in a vertical position (upward). Ensure there is sufficient clearance for the 2 meter cable to be routed without tension.

• Electrical Driver Setup: When configuring the controller, ensure the bipolar drive settings match the Danfoss motor specifications (typically 100 mA RMS). Setting the current too high will cause the motor to overheat, while setting it too low will result in missed steps and inaccurate flow regulation.