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T-TE 2 Product Presentation - 2001.07.23, JBM page 1
Refrigeration andAir Conditioning
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T/TE2 Thermostatic Expansion Valves
T-TE 2 Product Presentation - 2001.07.23, JBM page 2
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T/TE 2 Thermostatic Expansion Valves
The T2 thermostatic expansion valve family is the most universal and adaptable in the world:
• Wide capacity range• Wide temperature range• All new and old standard refrigerants• With MOP and without MOP
T-TE 2 Product Presentation - 2001.07.23, JBM page 3
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Danfoss T&TE 2 Thermostatic Expansion Valves
forLiquid Injection into Evaporators
Type T/TE 2 from 0.2 to 4.5 TR nominal capacity with 8 orifices
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Multi room installation
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T2 system pipe diagram
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T/TE 2 Thermostatic Expansion Valve
The T/TE 2 will control and maintain the amount of refrigerant to beinjected into the Evaporator.
It does this by keeping the Superheat Constant where the sensor is mounted on the suction line(In a constant load scenario)
T-TE 2 Product Presentation - 2001.07.23, JBM page 7
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T/TE 2 Body Types
T 2, Internal Equalizing, two connectionsInlet ¼” or 3/8” flare or solderOutlet ½” flare or solder
TE 2, External Equalizing, three connectionsInlet ¼” or 3/8” flare or solderOutlet ½” flare or solderEqualizing ¼” flare or solder
T/TE 2, All Normal Refrigerants
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Ranges:N, -40/+10°CN, -40/+10°C, MOP +15°CNM, -40/-5°C, MOP 0°CNL, -40/-15°C, MOP -10°CB, -60/-25°CB, -60/-25°C, MOP -20°C
Standard program:R22 R12R134a R502R404A/R507NOT: R410A
Special program:R23 + variousR407C
REFRIGERANTS & RANGES
T-TE 2 Product Presentation - 2001.07.23, JBM page 9
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T/TE 2 THERMOSTATIC EXPANSION VALVES
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Type : T2 / TE2Refrigerants CFC / HCFC / HFCMedia temp. oC -40 - +10, Range N
-40 - -5, Range NM -40 - -15, Range NL -60 - -25, Range B
Max. bulb oC 100 installedMWP / PB bar 34Max. test pressure 37
TECHNICAL DATA
T-TE 2 Product Presentation - 2001.07.23, JBM page 11
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T/TE 2 Cut-away Model
T-TE 2 Product Presentation - 2001.07.23, JBM page 12
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Label
T-TE 2 Product Presentation - 2001.07.23, JBM page 13
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Function of the T/TE 2
The TEV will try to keep a constant superheat at a constant load situationIf there is a change in load the TEV will open more at increasing load and open less at decreasing load, and again try to keep a constant superheatThe opening degree is decided by a balance between the opening force and the closing forces• Pressure in the Power element is the opening force (Sensor temperature)• Pressure from the refrigerant is a closing force• Pressure from the spring is the other closing force
T-TE 2 Product Presentation - 2001.07.23, JBM page 14
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Compressor not running.TEV closed.
4.7 bar bulb pressure
0.7 bar spring
4.7 bar
4°C
4.7 bar
evaporator pressure
4.7
0.7 4.7
Valve in
equilibrium
4°C
4.7 bar
R22
T-TE 2 Product Presentation - 2001.07.23, JBM page 15
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Thermostatic expansion valve is now operating at constant superheat.
3.85 bar bulb pressure
0.7 bar spring
3.8 bar
-1,05°C
3.1 bar
evaporator pressure
Valve constant opening degree
-6°C
3.1 bar
R22
3.8
0.7 3.1
T-TE 2 Product Presentation - 2001.07.23, JBM page 16
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Thermostatic expansion valve operating at slightly reduced load.
3.79 bar bulb pressure
0.7 bar spring
3.79 bar
-1.1°C
3.1 bar
evaporator pressure
Valve closing little
-6°C
3.1 bar
R22
3.79
0.7 3.1
T-TE 2 Product Presentation - 2001.07.23, JBM page 17
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Thermostatic expansion valve operating at increased load.
3.85 bar bulb pressure
0.7 bar spring
3.85 bar
-0.73°C
3.1 bar
evaporator pressure
Valve opening
-6°C
3.1 bar
R22
3.85
0.7 3.1
T-TE 2 Product Presentation - 2001.07.23, JBM page 18
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The compressor is stopped,TEV positively closed.
4.7 bar bulb pressure
0.7 bar spring
4.7 bar
4°C
4.7 bar
evaporator pressure
Valve closed during standstill
4°C
4.7 bar
R22
4.7
0.7 4.7
T-TE 2 Product Presentation - 2001.07.23, JBM page 19
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Superheat
Valve Capacity
Reserve Capacity
Rated Capacity
Full Open Capacity
SS OS
OPS
Capacity / superheat relationship
T-TE 2 Product Presentation - 2001.07.23, JBM page 20
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Adjusting the T/TE 2
In most cases it is not necessary to adjust the T/TE 2
If you have the experience, to improve the system performance by adjusting the valve, please do so
T-TE 2 Product Presentation - 2001.07.23, JBM page 21
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Adjusting the TEV
T-TE 2 Product Presentation - 2001.07.23, JBM page 22
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Adjusting the TEV
T-TE 2 Product Presentation - 2001.07.23, JBM page 23
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Changing the Orifice
T-TE 2 Product Presentation - 2001.07.23, JBM page 24
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Changing the Orifice, solder version
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Using the T/TE 2
Why ?When ?How ?Where ?Recommendations !
T-TE 2 Product Presentation - 2001.07.23, JBM page 26
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WHY ?
To be able to accurately injectthe amount of refrigerant requiredinto the evaporator.
T-TE 2 Product Presentation - 2001.07.23, JBM page 27
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WHEN ?
Every time there is a refrigeration system there should be one TEV for each evaporator (If not another means of throttle device is used)
T-TE 2 Product Presentation - 2001.07.23, JBM page 28
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HOW ?
By mounting the TEV in the refrigeration circuit with any necessary adjustment
T-TE 2 Product Presentation - 2001.07.23, JBM page 29
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Where ?
Always at the inlet of the evaporator
T-TE 2 Product Presentation - 2001.07.23, JBM page 30
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Adjust if you want to optimize evaporator performance
Adjust if the TEV is hunting
Recommendations !
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T-TE 2 Product Presentation - 2001.07.23, JBM page 31
SIZING THE T/TE2
The Catalogue Way
The Electronic Way
T-TE 2 Product Presentation - 2001.07.23, JBM page 32
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The Sales Features
• Hot Stamped Brass Body• Metal to metal push pin/guide• Stainless steel bulb• Stainless steel capillary• Stainless steel capsule and diaphragm• Laser welding• Laser engraving• Double contact bulb• Eight interchangeable orifices• Stainless steel seat and cone• Generous inlet filter• Six charge versions (Range/MOP)• Automated production (ISO 9002)
T-TE 2 Product Presentation - 2001.07.23, JBM page 33
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The Competition
• Primary :- Alco TI(E) (T2 Copy)- Egelhof TEW (T2 Copy)- Flica TMV (T2 Copy)- Sporlan Q
• Secondary :- FAS (T2 Copy)- Parker- Saginomiya- Fuji Koki- Teddington TED (T2 Copy)
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