Control valves

Self-acting controls

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271

185

4.5.11

178 (SA128)

415

240

248

271

270

326

Type

Range

Temperature

Maximum sensor temperature

Material

Weight

kg

Standard

capillary tube (m)

SA121

1

2

3

-15 to 50°C

40 to 105°C

95 to 160°C

55°C over set value to max. 190°C

Brass

2.0

2, 4, 8 and 20

SA122

1

2

-20 to 120°C

40 to 170°C

55°C over set value

Brass

1.8

2, 4, 8, and 20

SA123

1

2

3

-15 to 50°C

40 to 105°C

95 to 160°C

55°C over set value

Brass

2.5

2, 4, 8, and 20

SA128

1

2

-20 to 110°C

40 to 170°C

55°C over set value to max. 190°C

Brass

1.8

2, 4, 8, and 20

SA422

1

2

-20 to 120°C

40 to 170°C

55°C over set value

Stainless

steel

1.4

2.4 or 4.8*

SA423

1

2

3

-15 to 50°C

40 to 105°C

95 to 160°C

55°C over set value

Stainless

steel sensor

remainder brass

2.5

2, 4, 8, and 20

Table 7 Control system selection

The control systems are available in four configurations as shown below.

Each type is available with either a dial or knob type temperature adjustment except the Type 422 (dial only).

Dimensions are approximate in mm

Actuator

SA121, SA128

Setting knob

Capillary

SA123, SA423

310 (SA121)

Sensor

25

Actuator

SA122

Capillary

Type 422

Capillary

Setting dial

17

Actuator

Sensor

Setting knob

Capillary

Setting knob

25

Actuator

Sensor

25

Capillary

Specifications

395

Sensor

* Longer lengths up to 9.6 m are available to special order

2-Port Self-acting Temperature Control Valve Selection

for Heating and Cooling Applications

TI-S21-07 CH Issue 1

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