Data Sheet
Thermostatic Expansion Valves
Type TR6
The TR6 series is a hermetic design which is developed with features especially for use in applications such as:
• Residential air conditioning systems
• Split systems
• Roof top units
• Heat pumps
• Chillers
• Light commercial air conditioning systems
The TR6 design incorporates a forged brass body with the entire power element, including the capillary tube and bulb, fabricated from stainless steel. All valves are designed with balanced port which reduces the influence from varying condensing pressures. The valves can be delivered with special connections and fittings both at the inlet, outlet, and the equalizer connection.
AI318728845972en-000401
Thermostatic Expansion Valves, Type TR6
Features
•Compact size - hermetic design, straightway configuration with external equalization
•Refrigerants & rated capacities ranging up to
◦R22/R407C: 23.6 kW / 6.7 TR
◦R410A: 24.5 kW / 7 TR
•Laser-welded power element
◦Longer diaphragm life
◦High corrosion resistant
•Stainless steel capillary tube
◦Tolerates more bending for easier installation and longer life
◦High strength and vibration resistance
•Stainless steel bulb
◦Self aligning
•Balance port design
•A complete program with and without internal check valve
•Internal check valve design with low pressure drop in reverse flow
•Adjustable or non-adjustable superheat, for customer specific factory setting
•Bleed function available
•Solder, chatleff and aeroquip connections
•With external equalization
•UL listed, file SA7200
•Anti-hunt bulb charge
© Danfoss | Climate Solutions | 2021.02 |
AI318728845972en-000401 | 2 |
Thermostatic Expansion Valves, Type TR6
Application
Traditional air conditioning system, cooling only
Figure 1: Traditional air conditioning system, cooling only
|
<![if ! IE]> <![endif]>Danfoss R64-1822.12 |
A |
|
|
D |
B |
C |
|
|
|
E |
ATR6 with / without internal check valve
BRD Distributor
CCompressor
DOutdoor coil
EDCL/DML
Illustrates the diagram of a traditional air conditioning system where the TR6 is controlling liquid injection in one direction only.
Traditional air conditioning / heat pump system
Figure 2: Traditional air conditioning / heat pump system
B |
|
H |
|
D |
<![if ! IE]> <![endif]>Danfoss 1823.13R64- |
|
|
|
A |
|
|
|
E |
G |
C |
|
|
|
F |
|
|
|
ARD Distributor
BIndoor coil
CTR6 with internal check valve
D4-way valve
ECompressor
FDCB/DMB
GTR6 with internal check valve
HOutdoor coil
Illustrates a split air conditioning / heat pump system with two thermostatic expansion valves, one for cooling mode and one for heating mode. The thermostatic expansion valves each has a built-in check valve, which has the function of preventing flow in one direction and allowing the flow in the opposite direction. It means that one thermostatic expansion valve is controlling liquid injection into the indoor coil while the other thermostatic expansion valve is bypassing the metering device with the open check valve.
© Danfoss | Climate Solutions | 2021.02 |
AI318728845972en-000401 | 3 |
Thermostatic Expansion Valves, Type TR6
Simplified air conditioning / heat pump system (bi-flow)
Figure 3: Simplified air conditioning / heat pump system (bi-flow)
|
<![if ! IE]> <![endif]>Danfoss R64-1824.13 |
A |
RD Distributor |
|
B |
B |
Indoor coil |
||
|
||||
D |
|
C |
TR6 without check valve |
|
|
|
|||
F |
|
D |
4-way valve |
|
A |
|
E |
Compressor |
|
|
|
|||
|
|
F |
Outdoor coil |
|
E |
|
|
|
|
C |
|
|
|
Illustrates a packaged air conditioning / heat pump system with a short distance between the indoor and outdoor heat-exchangers. The two TR6 valves from fig 6 can be replace by one TR6 valve without internal check valve, making use of the bi-flow feature of this thermostatic expansion valve. The single valve is controlling the liquid injection in both directions. The normal flow direction marked with an arrow on the valve body should be used for the primary function, i.e. cooling or heating.
© Danfoss | Climate Solutions | 2021.02 |
AI318728845972en-000401 | 4 |