Danfoss 068Z3728 1/4 - 5.5TR Expansion Valve Body, TE 2, R448A,R449A, 3/8x1/2 in, Flare, External Equalized, Bi-Flow, -40 to 50 F, Capacity determined by Orifice size Sold Separately, Identical Product 068Z3732

Weight : 0.701 LBR
Volume : 0.01730686 FTQ
Model : 068Z3728
UPC-EAN : 5702428961998

Danfoss 068Z3728 Thermostatic Expansion Valve – TE2 for R448A and R449A

The Danfoss 068Z3728 thermostatic expansion valve (TXV) is designed for high precision refrigerant control in medium and low-temperature systems using R448A or R449A. This externally equalized angleway valve ensures stable superheat, even under significant evaporator pressure drops.

Key Features

• Refrigerant: R448A, R449A
• Capacity: 0.25 to 5.5 tons (based on orifice)
• Temperature Range: -40 F to +50 F
• Connections: 3/8 inch flare inlet × 1/2 inch flare 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: 068Z3732

Applications

Ideal for supermarket display cases, walk-in coolers, transport refrigeration, ice machines, and other R448A/R449A systems requiring precise refrigerant metering.

Competitor Equivalent Part Numbers

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

Frequently Asked Questions

• Is the orifice interchangeable?
  Yes. The TE2 valve supports orifice sizes 01–05 for accurate capacity tuning.
• Why external equalization?
  It compensates for evaporator pressure drop to maintain stable superheat control.
• Can it be used with other refrigerants?
  No. This valve is calibrated exclusively for R448A and R449A.
• What role does the capillary tube serve?
  The 59 inch tube links the sensing bulb to the valve for responsive charge control.