Danfoss 068Z3400 1/6 - 4.5TR Expansion Valve Body, T 2, R404A,R507A, 3/8x1/2 in, Flare, Internal Equalized, Single-flow, -40 to 50 F, Capacity determined by Orifice size Sold Separately, 068Z3508
Applications: Traditional refrigeration, Self-contained refrigerators, Transport refrigeration, Supermarket refrigeration
Hermetic, laser welded, non-replaceable stainless steel power head, Laser engraved product information for lasting identification of valve type
Functional valve consists of valve body and orifice. Nominal capacity varies according to selected orifice from 1/6 to 4.5 tons
Flare Inlet and Outlet connections. Flare/solder adapter available as an additional accessory
Make superheat adjustments 14 turn at a time (14 turn equals 1.75 F). Turning clockwise increases superheat. Turning counter-clockwise decreases superheat.
Weight : 2.0 LBR
Volume : 0.01730686 FTQ
Model : 068Z3400
UPC-EAN : 5702422125280
Danfoss 068Z3400 Thermostatic Expansion Valve T2 for R404A and R507A
The Danfoss 068Z3400 thermostatic expansion valve (TXV) is engineered for precise refrigerant flow control in refrigeration and HVAC systems using R404A or R507A. Its angleway configuration with internal equalization ensures stable superheat regulation in low- and medium-temperature applications.
Key Features
Refrigerant: R404A, R507A
Capacity: 0.3 to 5.8 tons (1 to 20.5 kW) depending 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: 068Z3508
Applications
Ideal for traditional refrigeration systems, transport refrigeration, supermarket display cases, and self-contained coolers requiring accurate expansion of R404A or R507A under varying load.
Competitor Equivalent Part Numbers
Emerson TX2 series
Sporlan EBS series
ALCO TI series
Frequently Asked Questions
Is the orifice interchangeable?
Yes, the T2 body accepts interchangeable orifice sizes from 01 to 05 for precise capacity matching.
Why internal equalization?
It is designed to maintain stable superheat control in systems with minimal evaporator pressure drop.
Can the valve be used with other refrigerants?
No, it is specifically calibrated for R404A and R507A only.
What does the capillary tube do?
The 59 inch capillary transfers the sensing bulb temperature to the valve for accurate superheat regulation.