Brochure

Emerson Climate Technologies
14
Thermal Expansion Valves
Nomenclature example: NAE 3 ZAA ODF B15%
N A E 3 ZAA ODF B15%
NXT Series Body Type
A = Adjustable, With Check, Straight-Through
B = Adjustable, No Check, Straight-Through
C = Non-Adjustable, With Check,
Straight-Through
D = Non-Adjustable, No Check,
Straight-Through
Equalizer
E = External
Equalizer
Capacity
(In Tons)
Refrigerant
Code
ZAA = R-410A
Connection
Type
ODF = Solder
CHA = Chatleff
Bleed %
(Omit for None)
Features
• Precision superheat control optimized for R-410 A systems
• Enhanced power element design offers extended valve life
• Stainless steel power element eliminates corrosion and
prevents valve failure
• Laser etched identification markings for permanent legibility
• Hermetic, leak-free construction of all joints
• Compact size allows installation in limited spaces
• Bi-Flow capability allows one valve to control the superheat
in both cooling and heating modes for close-coupled or
packaged heat pump applications
• Balanced port construction compensates for changes in
operating pressures due to varying ambients, gas defrost,
heat reclaim, or widely varying evaporator loads
• External equalizer is standard
• Screens on ODF inlet connections
The Emerson NXT Series is a balanced ported valve designed for
high efficiency R-410A air conditioning and heat pump applications.
NXT Series valves operate over a wide range of conditions and
applications, while offering excellent performance, superior
reliability, and unparalleled valve life.
Specifications
• Maximum working pressure (MWP): 700 psig
• R-410A operating range: -20°F to +50°F
• UR/CUR file number: SA 5312
Options
• High flow internal check valve (1-7 tons) allows reverse flow for
heat pump applications, eliminating the need for external check
valve and improving overall system efficiency
• Adjustable or non-adjustable superheat
• Bleed type pressure equalization available to accommodate
PSC type compressors
• ODF connections are standard - Chatleff connections are
available
• External equalizer (1/4” ODF) is a standard offering. Other
configurations are available
• External equalizer 1/8” tube with 45° end cut is a standard
offering - other terminations are available
Non-Adjustable
Adjustable
NXT Series