Danfoss Electronics TR 6 Data Sheet

MAKING MODERN LIVING POSSIBLE

Data sheet

Thermostatic Expansion Valves
Type TR 6

Introduction
The TR 6 series is a hermetic tight design,
designed and developed with features
especially for use in applications such as:

y Residential air conditioning systems
y Split systems
y Roof top units
y Heat pumps
y Light commercial air conditioning systems
y Chillers

Features y Compact size - hermetic design

y Refrigerants & rated capacities ranging up to

- R22: 6.7 TR / 23.6 kW

- R410A: 7 TR / 24.5 kW

- Others on request

y Laser-welded power element

- Longer diaphragm life.

- High pressure tolerance and working
pressure.

y Stainless steel capillary tube

- Tolerates more bending for easier installation
and longer life.

- High strength and vibration resistance.

y Stainless steel bulb

- Self-aligning for fast and easy installation;
secures with a single bulb strap/OEM strap

- More contact surface for better heat transfer

The TR design incorporates a hot-pressed
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 inuence from varying condensing
pressures. The valves can be delivered with
special connections and ttings both at the
inlet and outlet and at the equalizer connec­tion.

y Balance port design
y A complete program with internal check valve

with low pressure drop at full ow or without
internal check valve.

y Adjustable or non-adjustable superheat, for

customer specic factory setting.

y Bleed function available.
y Customer specic engravement.
y Solder and mechanical connections
y Straightway versions with xed orice and

with external equalization.

y UL listed, le SA7200

DKRCC.PD.AN0.A6.22 / 520H7258

Data sheet Thermostatic expansion valves , type TR 6

Valve program

Standard versions

Options on request

Technical data

Refrigerants:

R22 and R410A

Operating range:

+14 °F to +59 °F / –10 °C to +15 °C

Setting:

Fixed setting:

Static superheat in accordance with
customers' specications.

Adjustable setting:

Factory static superheat of 7.2 °F / 4 °K.

Refrigerants:

Other refrigerants.

Range:

Other temperature ranges.

MOP:

Special MOP charges.

Capillary tube lengths:

20 In. / 0.5 m

38.4 In / 0.975 m

Max. operating temperature

Thermostatic element:

R22: max. 212 °F / 100 °C
R410A: max. 212 °F / 100 °C

Valve body:
230 °F / 110 °C

Packing:

Single or industrial pack

Versions:

All valves are in straightway versions.
With or without internal check valve.

Standard connections:

3

/8 in. ODF inlet x 1/2 in. ODF outlet x

1

/4 In are nut 24.3 inch length

Capillary tube length: 31.5 In /0.8 m

Options for Connections:

Inlet/Outlet:

– Inlet: 3/8 in. ODM, 3/8 in. ODF, 1/2 in. ODF, chatle,

aeroquip

– Outlet: 3/8 in. ODF, 1/2 in ODF, 5/8 in ODF, chatle,

aeroquip, are

Equalizer:

Cu capillary tube size: Ø 1/8 in.
¼ in. Flare Nut with l = 9.5, 16.9 or 24.3 in.
Solder 1/8 in. ODM with l = 16.9 or 24.3 in.
Solder 1/4 in ODF with l = 31.7 or 39.1 in.

Max. working pressure

MWP 630 psig / PS = 45.5 bar

Max. test pressure

680 psig / Pf = 47 bar

Identication

Essential valve data is given on the power element.

Main valve data example:

TR6 = Valve type
R410A = Refrigerant

6.70 TR = Rated capacity Qnom

in Tons of Refrigeration
MWP 630psig/
PS 45.5 bar = Max. working pressure in
psig and bar

067Uxxxx = Code number
BC1109D = Date making (BC=Mexico,

week 11, year 2009,
weekday D=Thursday)
+15/+60 °F = Evaporating temperature
range in °F

-10/+15 °C = Evaporating temperature
range in °C

Fig. 1

2 DKRCC.PD.AN0.A6.22 / 520H7258

Data sheet Thermostatic expansion valves , type TR 6

Design and function

Fig. 2 TR 6 with xed setting

1. Bulb

2. Thermostatic element

3. Push pin seal

4. Balanced port

5. Check valve

6. Setting spindle for adjustment
of static superheat (SS)

7. Equalizer

8. Inlet connection

9. Outlet connection

Fig. 3 TR 6 with adjustable setting

The central push pin is sealed with a robust seal
(pos. 3) that ensures maximum tightness and
minimum friction through the lifetime of the
valve.

The balanced port (pos. 4) ensures minimal
superheat changes when condensing pressure
varies. This feature makes the valve ideal for bi­ow operation.

Static superheat (SS) can be adjusted with the
setting spindle (see g. 3, pos. 6) . The standard
superheat setting is 3.6 ° F / 2 °K.

Fig. 4

Terminology (g.4)

SS = Static superheat
OS = Opening superheat
OSH = SS + OS = Operating superheat

Example

Static superheat
SS = 3.6°F (2K) (factory setting)
or according to customer specication.

Opening superheat
OS = 7.2 °F (4K)

The opening superheat is 7.2 °F / 3.6 °C, i.e. from
the point the valve begins to open up to nominal
capacity. Opening superheat (OS) is a xed value
and cannot be changed.

Operating superheat
OSH = SS + OS
OSH = 3.6 °F + 7.2 °F = 10.8 °F (6 °K)

OSH is the total superheat that can be measured
on the system.

DKRCC.PD.AN0.A6.22 / 520H7258 3