R744 compressors subcritical application

All connections to the pipes are made of steel.

R744 is an odourless and colourless gas and cannot be perceived directly in case of emission!

R744 is an odourless and colourless gas and cannot be perceived directly in case of emission!

Lost of consciousness and danger of suffocation by inhaling higher concentrations!

Avoid R744 emission and uncontrolled deflating, particularly in closed rooms!

Aerate closed machine rooms!

Make sure that the safety regulations in accordance with EN378 are complied with!

Liquid R744 evaporates quickly, cools down at the same time and forms dry ice!
danger

Liquid R744 evaporates quickly, cools down at the same time and forms dry ice!

Danger of cold burns and frost bites!

Avoid uncontrolled deflating of R744!

When filling the system with R744, wear gloves and goggles!

In addition to the safety references listed in this document, it is essential to observe the references and residual risks in the respective operating instructions!

SL models

Shut-off valves for R744 compressors, subcritical application (SL models).
For each compressor there is only the listed standard valve (in contrast to e.g. compressors for transcritical application).
Ø: diameter
HP: high pressure
LP: low pressure

Compressor

Side

Connection at compressor

Valve

Ø of suitable brazing pipes

Ø of suitable welding pipes

2NSL .. 2FSL

HP

1/8-27 NPTF

Di12/Da17

1/2''

17.2 mm (DN10)

2NSL .. 2FSL

LP

1/8-27 NPTF

Di16/Da22

5/8'' // 16 mm

21.3 mm (DN15)

2ESL .. 2CSL

HP

1/8-27 NPTF

Di16/Da22

5/8'' // 16 mm

21.3 mm (DN15)

2ESL .. 2CSL

LP

1/8-27 NPTF

Di22/Da30

7/8'' // 22 mm

26.9 mm (DN20)

4DSL .. 4CSL

HP

1/8-27 NPTF

Di22/Da30

7/8'' // 22 mm

26.9 mm (DN20)

4DSL .. 4CSL

LP

1/8-27 NPTF

Di28/Da35

1 1/8''

33.7 mm (DN25)

4FSL .. 4ESL

HP

1/8-27 NPTF

Di16/Da22

5/8'' // 16 mm

21.3 mm (DN15)

4FSL .. 4ESL

LP

1/8-27 NPTF

Di28/Da35

1 1/8''

33.7 mm (DN25)

4VSL .. 4NSL

HP

1/8-27 NPTF

Di22/Da30

7/8'' // 22 mm

26.9 mm (DN20)

4VSL .. 4NSL

LP

1/8-27 NPTF

Di35/Da42
Di35/Da42/UL

1 3/8'' // 35 mm

42.4 mm (DN32)

ME models with high standstill pressures

Shut-off valves for R744 compressors, subcritical application with high standstill pressure (ME models).
For each compressor there is only the listed standard valve (in contrast to e.g. compressors for transcritical application).
Ø: diameter
HP: high pressure
LP: low pressure

Compressor

Side

Connection at compressor

Valve

Ø of suitable brazing pipes

Ø of suitable welding pipes

2MME .. 2FME

HP

1/4-18 NPTF

Di12/Da17

1/2''

17.2 mm (DN10)

2MME .. 2FME

LP

1/4-18 NPTF

Di16/Da22

5/8'' // 16 mm

21.3 mm (DN15)

2EME .. 2DME

HP

1/4-18 NPTF

Di16/Da22

5/8'' // 16 mm

21.3 mm (DN15)

2EME .. 2DME

LP

1/4-18 NPTF

Di22/Da30

7/8'' // 22 mm

26.9 mm (DN20)

4DME

HP

1/4-18 NPTF

Di22/Da30

7/8'' // 22 mm

26.9 mm (DN20)

4DME

LP

1/4-18 NPTF

Di28/Da35

1 1/8''

33.7 mm (DN25)

4FME(M) .. 4EME(M)

HP

1/4-18 NPTF

Di16/Da22

5/8'' // 16 mm

21.3 mm (DN15)

4FME(M) .. 4EME(M)

LP

1/4-18 NPTF

Di28/Da35

1 1/8''

33.7 mm (DN25)

4TME(M) .. 4PME(M)

HP

1/4-18 NPTF

Di28/Da35

1 1/8''

33.7 mm (DN25)

4TME(M) .. 4PME(M)

LP

1/8-27 NPTF

Di35/Da42

1 3/8'' // 35 mm

42.4 mm (DN32)

6TME(M) .. 6PME(M)

HP

1/8-27 NPTF

Di35/Da42

1 3/8'' // 35 mm

42.4 mm (DN32)

6TME(M) .. 6PME(M)

LP

1/8-27 NPTF

Di41/Da48

1 5/8''

48.3 mm (DN40)

8VME .. 8PME

on request

Nominal diameters (DN) are not actual dimensions!

Nominal diameters (DN) are not actual dimensions!

The nominal diameters DN10 .. DN200 only indicate ranges! The number is not a quantifiable unit, it is only indirectly related to the diameters of the connections and should not be used in calculations.