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Danfoss CS Pressure switches

Danfoss CS Pressure switches for air and water
CS pressure switches have a three-pole switch and adjustable differential.
Whereas most pressure switches have fixed differential pressure, the Danfoss CS pressure switch features an adjustable differential, so the switch can be adjusted to suit a variety of working conditions. And the CS switch is supplied with a manual switch to lock the contact system in the open position independent of the pressure in the tank for added safety.

 

CS pressure switches
• For automatic start and stop of air compressors and water boosters
• Pressure ranges: 2 to 20 bar
• Contact system: 3-pole (standard) and 1-pole (accessory)
• Adjustable differential
• Manual switch to lock the contact system
• Relief valve (accessory)
• Enclosure IP43 or IP55
• Also available with DVGW (KTW) drinking water approval

Code number

Type

Regul. range [bar] Pe

Conn. size

Diff. min. range setting [bar]

Diff. max. range setting [bar]

Max. working pressure [bar] Pe

Contact function

Encl.

031E020066

CS

2,00 - 6,00 bar

G 1/4

0,72 - 1,00 bar

1,00 - 2,00 bar

6,0 bar

TPST

IP43

031E020266

CS

2,00 - 6,00 bar

G 1/4

0,72 - 1,00 bar

1,00 - 2,00 bar

6,0 bar

SPDT

IP43

031E020566

CS

2,00 - 6,00 bar

G 1/4

0,72 - 1,00 bar

1,00 - 2,00 bar

6,0 bar

TPST

IP55

031E021066

CS

2,00 - 6,00 bar

G 1/2 A

0,72 - 1,00 bar

1,00 - 2,00 bar

6,0 bar

TPST

IP43

031E021566

CS

2,00 - 6,00 bar

G 1/2 A

0,72 - 1,00 bar

1,00 - 2,00 bar

6,0 bar

TPST

IP55

031E021866

CS

2,00 - 6,00 bar

G 1/2 A

0,72 - 1,00 bar

1,00 - 2,00 bar

6,0 bar

TPST

IP55

031E022066

CS

4,00 - 12,00 bar

G 1/4

1,00 - 1,50 bar

2,00 - 4,00 bar

12,0 bar

TPST

IP43

031E022566

CS

4,00 - 12,00 bar

G 1/4

1,00 - 1,50 bar

2,00 - 4,00 bar

12,0 bar

TPST

IP55

031E023066

CS

4,00 - 12,00 bar

G 1/2 A

1,00 - 1,50 bar

2,00 - 4,00 bar

12,0 bar

TPST

IP43

031E023566

CS

4,00 - 12,00 bar

G 1/2 A

1,00 - 1,50 bar

2,00 - 4,00 bar

12,0 bar

TPST

IP55

031E024066

CS

7,00 - 20,00 bar

G 1/4

2,00 - 3,50 bar

3,50 - 7,00 bar

20,0 bar

TPST

IP43

031E024566

CS

7,00 - 20,00 bar

G 1/4

2,00 - 3,50 bar

3,50 - 7,00 bar

20,0 bar

TPST

IP55

031E025066

CS

7,00 - 20,00 bar

G 1/2 A

2,00 - 3,50 bar

3,50 - 7,00 bar

20,0 bar

TPST

IP43

031E025566

CS

7,00 - 20,00 bar

G 1/2 A

2,00 - 3,50 bar

3,50 - 7,00 bar

20,0 bar

TPST

IP55

031E026566

CS

2,00 - 6,00 bar

G 1/2 A

0,72 - 1,00 bar

1,00 - 2,00 bar

6,0 bar

TPST

IP55

031E027166

CS

4,00 - 12,00 bar

G 1/2 A

1,00 - 1,50 bar

2,00 - 4,00 bar

12,0 bar

TPST

IP43

031E101066

CS

2,00 - 6,00 bar

G 1/2 A

0,72 - 1,00 bar

1,00 - 2,00 bar

6,0 bar

TPST

IP43

031E101266

CS

4,00 - 12,00 bar

G 1/2 A

1,00 - 1,50 bar

2,00 - 4,00 bar

12,0 bar

TPST

IP43

031E101466

CS

7,00 - 20,00 bar

G 1/2 A

2,00 - 3,50 bar

3,50 - 7,00 bar

20,0 bar

TPST

IP43

031E218866

CS

2,00 - 6,00 bar

G 1/2 A

0,72 - 1,00 bar

1,00 - 2,00 bar

6,0 bar

TPST

IP43

031E219166

CS

2,00 - 6,00 bar

G 1/2 A

0,72 - 1,00 bar

1,00 - 2,00 bar

6,0 bar

TPST

IP43

Pressure switches types PS and PSU
** OBSOLETE replaced by CS range- Table for pressure reference only ***
Types PS and PSU were pressure controlled three-pole switches. The position of the contacts depended on the pressure in the inlet connection and the range setting.
Pressure switch type PS was for the automatic stop and start of motors in compressed air and water pressure plant (pressure storage tanks).
Type PSU were especially for compressed air plant where pressure over the compressor piston must be relieved before re starting.

Code number

Type

Regul. range [bar] Pe

Conn. size

Diff. min. range setting [bar]

Diff. max. range setting [bar]

Max. working pressure [bar] Pe

With unloader valve

Without unloader valve

031E0171

PS4B

1 – 4 bar

G 1/2 A

0.6 – 0.7 bar

3

20 bar

 

X

031E0172

PSU4B

1 – 4 bar

G 1/2 A

0.6 – 0.7 bar

3

20 bar

X

 

031E0182

PS7B

1 – 7 bar

G 1/2 A

0.95 – 1.3 bar

3

20 bar

 

X

031E0175

PS9B

2.5 – 9.5 bar

G 1/2 A

1.2 – 1.8 bar

7

25 bar

 

X

031E0176

PSU9B

2.5 – 9.5 bar

G 1/2 A

1.2 – 1.8 bar

7

25 bar

X

 

031E0179

PS15B

7 – 15 bar

G 1/2 A

1.7 – 2.3 bar

7

25 bar

 

X

031E0180

PSU15B

7 – 15 bar

G 1/2 A

1.7 – 2.3 bar

7

25 bap

X

 

 

Conversion table PS/PSU to CS Switches

Old Version

New Version

Type

Code No.

Relief Valve Included

Stop Pressure Range

BAR

Stop Pressure Range

BAR

Code No.

Type

Order Relief Valve Separately

PS 4B

031E0171

No

1 to 4

2 to 6

031E021566

CS

No

PSU 4B

031E0172

Yes

1 to 4

2 to 6

031E021566

CS

031E029866

PS 7B

031E0183

No

1 to 7

2 to 6

4 to 12

031E021566

031E023566

CS

No

PS 9B

031E0175

No

2.5 to 9.5

2 to 6

4 to 12

031E021566

031E023566

CS

No

PSU 9B

031E0176

Yes

2.5 to 9.5

2 to 6

4 to 12

031E025566

031E023566

CS

031E029866

PS 15B

031E0179

No

7 to 15

7 to 20

031E025566

CS

No

PSU 15B

031E0180

Yes

7 to 15

7 to 20

031E025566

CS

031E029866

PSU 20

031E0191

Yes

7 to 20

7 to 20

031E025566

CS

031E029866

 

 

When the old pressure range is not covered by one new product completely, please select new switch based on set pressure point.

 

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