Danfoss 068Z3730 1/4 - 5.5TR Expansion Valve Body, TE 2, R448A,R449A, 3/8x1/2 in, Flare x ODF, External Equalized, Bi-Flow, -40 to 50 F, Capacity determined by Orifice size Sold Separately, Identical Product 068Z3734

Weight : 0.69 LBR
Volume : 0.01730686 FTQ
Model : 068Z3730
UPC-EAN : 5702428962513

Danfoss 068Z3730 Thermostatic Expansion Valve – TE2 for R448A and R449A

The Danfoss 068Z3730 thermostatic expansion valve (TXV) delivers precise refrigerant control for medium and low temperature refrigeration systems using R448A or R449A. This externally equalized angleway valve ensures stable performance even with significant evaporator pressure drop.

Key Features

• Refrigerant: R448A, R449A
• Capacity: 0.5 to 6.0 tons (based on orifice)
• Temperature Range: -40 F to +50 F
• Connections: 3/8 inch flare inlet × 1/2 inch ODF Solder outlet
• Valve Type: Angleway, externally equalized
• Capillary Tube Length: 59 inch
• Max Working Pressure: 500 psig
• Static Superheat: 7.2 F (adjustable)
• Identical Part Number: 068Z3731 (depending on orifice)

Applications

Perfect for commercial coolers, blast chillers, transport refrigeration, and other systems that require precise expansion of R448A or R449A under variable load.

Competitor Equivalent Part Numbers

• Emerson TX3 series
• Sporlan ER series
• ALCO TIE series

Frequently Asked Questions

• Are orifices interchangeable?
  Yes, supports 01–05 orifice sizes for system flexibility.
• Why choose external equalization?
  Compensates for evaporator pressure drop, improving cycle stability.
• May I use other refrigerants?
  No, this valve is calibrated only for R448A and R449A.
• Purpose of the capillary tube?
  The 59 inch capillary transmits bulb temperature to the valve for responsive superheat adjustment.