Válvula de Expansão Termostática regulam a injeção do líquido refrigerante nos evaporadores

Model

Equalization

Equalization connection
(in.)

Connection
form

Connection
Inlet×Outlet
(in.)

Capillary tube
(m)

CTV

Internal

Flare
SAE

3/8×1/2

1

CTVE

External

1/4 SAE

DTV

Internal

Solder
ODF

DTVE

External

1/4 ODF

Model

Orifice
number

Nominal capacity
(KW)

R134a

R22

R407C

R404A/R507

CTV(E)-
DTV(E)-

0

0.65

1.14

1.13

0.8

1

1.5

2.8

2.8

1.85

2

2.5

4.7

4.57

3.1

3

4

7.5

7.03

5

4

6.7

12.2

11.96

8.1

5

8.2

14.9

14.4

9.9

6

9.5

17.2

16.9

11.4

Nominal capacities base on +38 condensing temperature,+4 evaporating temperature and 1K liquid sub cooling at the inlet of the expansion valve. Valve pressure drop for R134a is rated at 0.41MPa.Valve pressure drop for R22, R407C and R404A/507 is rated at 0.69MPa.

Connection

Valve code

 Equalization

Refrigerant code

Orifice number

C

TV

E

X

6

C: Flare SAE
D: Solder ODF

Thermostatic expansion valve

E indicates external equalizer
(Omit for internal equalizer)

N--R134a
X--R22
Z--R407C
S--R404A/507

Orifice (06#)

The model CTVEX-6# is an example in the table.