Danfoss TEA Series

Danfoss TEA thermostatic expansion valves regulate the injection of liquid ammonia (R717) into evaporators, controlled by refrigerant superheat. They are especially suitable for liquid injection in dry evaporators where outlet superheat follows evaporator load proportionally — the standard configuration in industrial ammonia plants.

TEA valves feature interchangeable orifice assemblies and interchangeable thermostatic elements, with external pressure equalization as standard. The wide temperature range of −50 to +30 °C covers both freezing and refrigeration duty in one series.

Types available: Danfoss TEA 20 and TEA 85 frames, supplied with the element and orifice assembly matched to duty — for example TEA 20-2 for the −20 to +30 °C range. Orifice assemblies interchange across TEA, TEAQ, TEVA and TEAT within a frame size, so one set of spares covers the family. Send the evaporator duty, the evaporating temperature and the line size and we will confirm the frame, element and orifice.

Fit a TEA when an ammonia dry evaporator is hunting, starving or flooding back to the compressor — and remember the orifice, not the body, is usually what needs changing when the duty has shifted.