Danfoss 068Z3727 Thermostatic Expansion Valve – T2 for R448A and R449A

The Danfoss 068Z3727 thermostatic expansion valve (TXV) is specifically designed for precise refrigerant flow control in commercial refrigeration systems using R448A or R449A. This internally equalized angleway valve delivers accurate superheat regulation for low and medium temperature applications.

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, internally equalized
• Capillary Tube Length: 59 inch
• Max Working Pressure: 500 psig
• Static Superheat: 7.2 F (adjustable)
• Identical Part Number: 068Z3731

Applications

Ideal for supermarket walk-in coolers, cold rooms, transport refrigeration, and ice machines that require precise refrigerant metering of R448A or R449A.

Competitor Equivalent Part Numbers

• Emerson TX2 series
• Sporlan EBS series
• ALCO TI series

Frequently Asked Questions

• Is the orifice interchangeable?
  Yes, the T2 body supports orifice sizes 01–05 for capacity adjustment.
• What is the benefit of internal equalization?
  It maintains control when evaporator pressure drop is low, providing stable superheat regulation.
• Can this valve be used with other refrigerants?
  No, it is calibrated only for R448A and R449A.
• What does the capillary tube do?
  The 59 inch tube connects the sensing bulb to the valve for responsive superheat control.