Danfoss RA 2000 Arkusz danych - Strona 2

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Data Sheet

Selection and specification

Should water treatment be

used it is essential that dosing

instructions of the manufacturer

are strictly observed. It is

recommended that formulations

containing mineral oil are

avoided.

Valve bodies for two-pipe systems type RA-FN

Valve bodies for one-pipe pumped or gravity systems, type RA-G

Radiator thermostats for one-pipe and two-pipe systems

RA2000 thermostatic sensors (4) supplied in separate boxes

Type

Code no.

RA 2910

013G2910

RA 2920

013G2920

RA 2914

013G2914

RA 2912

013G2912

RA 2922

013G2922

RA 2916

013G2916

RA 5062

013G5062

RA 5065

013G5065

RA 5068

013G5068

(1) Temperatures shown are for units with built-in

sensors which are subject to influence from

radiation and flow temperature. Without these

influences, max. temperature is 2 °C higher at de-

sign load condition.

(2) Remote sensors are supplied with all the

capillary tube coiled within the sensor. When

installing the sensor, only the length required

should be uncoiled.

(1)

These valve bodies are supplied with compression

fittings for copper tube to BS 864. When these

connections are removed, a standard BSP screwed

inlet BS 21 remains.

(2)

Kvs-maximum indicates the water flow (Q) with valve

fully open.

(3)

Remote sensors are recommended.

013G3384

013G3386

013G3388

1) Remote sensors are recommended

2) Kvs-maximum indicates the water flow (Q) with valve fully open

When using RA2000 remote temperature adjusters the kv-values stated in the table above must

be reduced by approximately 40% to take into account the different characteristics of these

sensors.

VD.51.Q1.12 © Danfoss 10/2003

Sensor (Max. sensor temperature 60°C)

Built-in

Built-in, tamper proof

Built-in, low temperature range model

Remote sensor, 0 - 2 m capillary tube (2)

Remote sensor, 0 - 2 m capillary tube, tamper proof (2)

Remote sensor, 0 - 2 m capillary tube (2)

Remote temperature adjuster, 0 - 2 m capillary tube (3)

Remote temperature adjuster, 0 - 5 m capillary tube (3)

Remote temperature adjuster, 0 - 8 m capillary tube (3)

(3) Remote temperature adjusters are supplied with

adapters for RA-valves. Adaptors for older valves

can be ordered separately:

RAVL-adaptor, code no. 013G5192

RAV-adaptor, code no. 013G5193

(4) Important note: Do not use any RA2000

sensors with RA-FR bi-directional valve bodies.

kv-value

/h at 1 bar pressure drop)

P-band = K

Working pressure = static + differential pressures. The

maximum differential pressure specified is the maximum

pressure at which the valves give satisfactory control. As with

any device which imposes a pressure drop in the system,

noise may occur under certain flow/pressure conditions. To

ensure quiet operation, maximum pressure drop should not

exceed 40 to 45 kPa. The differential pressure can be

reduced by the use of Danfoss differential pressure controls.

Temp. range

Xp = 2K

5 - 26 °C (1)

5 - 22 °C (1)

5 - 26 °C

5 - 22 °C

8 - 28 °C

DKCD