Danfoss 067N3009 Expansion Valve

The Danfoss 067N3009 is a high-capacity TGEL 20 thermostatic expansion valve engineered for 15-ton R410A systems. Featuring a balanced port design, this TXV provides stable refrigerant metering and precise superheat control across a wide range of head pressures, making it essential for large-scale air conditioning, chillers, and heat pump applications. The valve is constructed with a durable brass body and 5/8" x 7/8" ODF solder connections to ensure leak-proof integration into the liquid line. It includes a 60-inch stainless steel capillary tube and a 12.5 orifice optimized for high-volume flow. As an externally equalized expansion valve, it utilizes a 1/4" ODF connection to accurately sense evaporator pressure, compensating for pressure drops in large coils. The integrated MOP (Maximum Operating Pressure) function, set at 667 PSI, protects the compressor against overload by limiting evaporator pressure during start-up or high-load conditions. This bi-flow capable valve remains a standard choice for contractors requiring reliability in high-pressure R410A refrigeration environments.

• Stable Superheat Control: The balanced port architecture neutralizes the influence of varying head pressures, preventing hunting and ensuring consistent performance.
• Enhanced Compressor Protection: A built-in 667 PSI MOP prevents high suction pressure from overloading the compressor motor.
• Durable Construction: Features a laser-welded, stainless steel power element and a robust brass valve body for long-term mechanical integrity.
• Bi-Flow Capability: Designed for versatility in heat pump systems, allowing efficient refrigerant metering in both cooling and heating modes.
• Complete Installation Kit: Includes the Type TGEL 20 bulb strap and cylindrical sensing bulb for immediate, secure mounting to the suction line.

What is the primary function of the 667 PSI MOP on this valve?
The Maximum Operating Pressure (MOP) protects the compressor by limiting the expansion valve's opening when evaporator pressure exceeds 667 PSI, preventing potential motor burnout during high-load periods.

Is the Danfoss 067N3009 compatible with bi-flow heat pump systems?
Yes, the Danfoss TGE series is specifically designed for bi-flow operation, providing accurate refrigerant flow control in both directions without the need for additional check valves in most configurations.

Why is external equalization necessary for this 15-ton TXV?
In high-capacity 15-ton R410A evaporators, internal pressure drops are common. The externally equalized 1/4" ODF connection allows the valve to reference actual pressure at the evaporator outlet, ensuring the superheat setting remains accurate.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.