Danfoss OUB Data sheet

Data Sheet

Oil seperator
Type OUB

Oil seperator type OUB is for use
in all refrigeration plants

Oil separator type OUB is for use in all
refrigeration plants where the compressor
lubricating oil must be returned directly to the
compressor oil sump under all operating
conditions.

In this way lubricating oil from the compressor
is prevented from circulating with the
refrigerant in the refrigeration system itself.

Features

• Ensures oil return to compressor oil sump.
Prevents compressor breakdown caused by
lack of lubrication. Increases compressor
operating life

• High eciency Due to the interaction of
reduced ow velocity, change of ow
direction for oil concentration, collection of
separated oil at high temperatures, and
automatic oil return to the crankcase

• Protects against liquid hammer in the
compressor

• Better utilisation of condenser and
evaporator capacity (no oil-gas collection)

• Pulsation and noise damping on the high­pressure side of system

• OUB 1 may be used in the following EX range:
Category 3 (Zone 2)

AI213886423775en-000801

123

781012131517

Float

Oil container

Float needle

Orice

Return oil connection (

1

⁄4 in. / 6 mm are /

solder)

Connection nipple

Inlet connection refrigerant vapour

Outlet connection refrigerant vapour

Oil concentrator

Fixing strap

Oil seperator, Type OUB

Functions

Figure 1: OUB 1/OUB 4

The very eective function of the OUB is due to the interaction of the following:

• velocity and change of ow direction of the incoming mixture of oil and refrigerant

• oil concentration, separation, and ltration

• storage of separated oil at high temperatures, thus preventing absorption of the refrigerant.
Refrigerant vapour is led through the inlet connection (12). The oil contained in the vapour is separated as a result
of the change in velocity and direction through the oil concentrator (15) which at the same time also acts as an oil

lter.

When the superheated refrigerant vapour ows around the oil container (2) some of the superheat is given o. In
this way the oil container reaches a constant high temperature and the separated oil is stored in a warm state, i.e.
with as low a refrigerant content as possible. Thus, the refrigerant is prevented from owing to the crankcase
where it could cause violent boiling.
The oat (1) opens the needle valve (3) depending on the amount of oil, whereupon the condensing pressure
forces the oil back to the crankcase therefore ensuring automatic oil return.

© Danfoss | Climate Solutions | 2021.02 AI213886423775en-000801 | 2

B2B1

D1

H

H 1

H 2

H 3 H 4

L3

Danfoss

40B100.10

OUT

OIL

IN IN

OUT

OUB 1 and 4 (solder connector)

OUB 1 and 4 (flare connector)

B

1 B

2

B3

D

B1

B

2

B3

Features

Specications

Refrigerants

R22, R134a, R290 **), R404A, R407A, R407C, R407F, R407H, R438A, R448A, R449A,
R449B, R450A, R452A, R454A *), R454C *), R455A *), R507A, R513A, R600 **),
R600a **), R1234ze *), R1270 **)

(1)

- OUB 1 only

(2)

- OUB 1s only

Max. working pressure

PS/MWP = 28 bar

Max. test pressure

Pe = 40 bar

Temperature of medium

-40 – 120 °C

Net volume
OUB 1: 0.52 l

OUB 4: 2.46 l

Oil reservoir
OUB 1: 0.1 l

OUB 4: 0.5 l

Recommended tightening torque of unions
OUB 1: 40 Nm

OUB 4: 90 Nm

Oil seperator, Type OUB

Product specication

Technical data

Table 1: For type OUB

(1)

(1)

OUB 1 is evaluated for R454A, R454C, R455A, R1234ze by ignition source assessment in accordance with standard EN ISO80079-36. Flare

OUB 1 is evaluated for R454A, R454C, R455A, R1234ze by ignition source assessment in accordance with standard EN ISO80079-36. Flare
connections are only approved for A1 and A2L refrigerants.

connections are only approved for A1 and A2L refrigerants.

(2)

(2)

OUB 1s is evaluated for R290, R454A, R454C, R455A, R600, R600a, R1234ze, R1270 by ignition source assessment in accordance with standard

OUB 1s is evaluated for R290, R454A, R454C, R455A, R600, R600a, R1234ze, R1270 by ignition source assessment in accordance with standard
EN ISO80079-36. Flare connections are only approved for A1 and A2L refrigerants

EN ISO80079-36. Flare connections are only approved for A1 and A2L refrigerants

For complete list of approved refrigerants, visit www.products.danfoss.com and search for individual code numbers,
where refrigerants are listed as part of technical data.

Dimensions and weight

Figure 2: OUB 1/OUB 4 - without connection unions

Figure 3: OUB 1/OUB 4 (are & solder connection)

© Danfoss | Climate Solutions | 2021.02 AI213886423775en-000801 | 3

1)2

)

B2B1

D

D1

H

H 1

H 2

H 3 H 4

L3

Danfoss

40B102.10

OUT

OUB 1s ¹)

OIL

IN IN

OUT

OUB 1s

1

⁄4 in. are connection to oil return line.

B2B1

D

D1

H

H 1

H 2

H 3 H 4

L3

Danfoss

40B103.10

OUT

OIL

OUB 1s ²)

IN

OUT

OUB 1s 6 mm ODF solder connection to oil return line.

Type

Flare connection

H

H1H2H3H4L1L2L3B1B2B3øD

1

Net

weight

[in]

[mm]

OUB 1

3

⁄8

10

177805.5949698950605530811.2

1

⁄2

12

177805.5949698950605531811.3

5

⁄8

16

177805.5949698950605538811.4

OUB 4

5

⁄8

16

263

126

8.5967

111

14372948544

131

4.6

3

⁄4

16

263

126

8.5967

111

14372948549

131

4.7125

263

126

8.5967

111

14372948551

131

4.8

Type

Solder

connection

H

H1H2H3H4L1L2L3B1B2B3øD

1

øD

Net

weight

[in]

[mm]

OUB 1

3

⁄8

10

177805.5949698950605529819.6

1.2

1

⁄2

12

177805.59496989506055318112.8

1.2

5

⁄8

16

177805.59496989506055428116.0

1.3

OUB 1s

-10177805.59496989816555-8110.0

1.2-10

177805.59496989506555-8110.0

1.2

Oil seperator, Type OUB

Figure 4: Flare connection to oil return line.

Figure 5: Solder connection to oil return line.

Table 2: Flare connection

Table 3: Solder connection

© Danfoss | Climate Solutions | 2021.02 AI213886423775en-000801 | 4

Type

Solder

connection

H

H1H2H3H4L1L2L3B1B2B3øD

1

øD

Net

weight

[in]

[mm]

OUB 4

5

⁄8

16

263

126

8.5967

111

14372948540

131

16.0

4.3

3

⁄4

18

263

126

8.5967

111

14372948545

131

19.1

4.3

7

⁄8

22

263

126

8.5967

111

14372948545

131

22.3

4.3125

263

126

8.5967

111

14372948545

131

25.5

4.3

1

1

⁄8

28

263

126

8.5967

111

14372948547

131

28.7

4.3

Oil seperator, Type OUB

© Danfoss | Climate Solutions | 2021.02 AI213886423775en-000801 | 5

Figure

Type

Connection

Rated plant capacity [kW]

Code no. for OUB + unions

(straightway)

[in]

[mm]

Version

R22

R134a

R404A

R507

R407C

OUB 1

3

⁄8

10

Flare

3.1

2.5

3.5

3.5

4.4

040B0010 + 2 × 040B0132

3

⁄8

-

Solder

3.1

2.5

3.5

3.5

4.4

040B0010 + 2 × 040B0140

1

⁄2

12

Flare

3.1

2.5

3.5

3.5

4.4

040B0010 + 2 × 040B0134

1

⁄2

-

Solder

3.1

2.5

3.5

3.5

4.4

040B0010 + 2 × 040B0142

5

⁄8

16

Flare

3.1

2.5

3.5

3.5

4.4

040B0010 + 2 × 040B0136

5

⁄8

16

Solder

3.1

2.5

3.5

3.5

4.4

040B0010 + 2 × 040B0144

Without connection unions

040B0010

OUB 4

5

⁄8

16

Flare

11.6

9.6

12.8

12.8

16.0

040B0040 + 2 × 040B0256

5

⁄8

16

Solder

11.6

9.6

12.8

12.8

16.0

040B0040 + 2 × 040B0266

3

⁄4

-

Solder

11.6

9.6

12.8

12.8

16.0

040B0040 + 2 × 040B0268

7

⁄8

-

Solder

11.6

9.6

12.8

12.8

16.0

040B0040 + 2 × 040B0270

1

1

⁄8

-

Solder

11.6

9.6

12.8

12.8

16.0

040B0040 + 2 × 040B0274

Without connection unions

040B0040

Figure

Type

Connection

Rated plant capacity

[kW]

Code no. for OUB +

unions

(straightway)

[mm]

Version

R22

R134aR404AR507R407C

OUB1s

(1)

10

Solder

3.1

2.53.53.54.4

040B0023

OUB1s

(2)

10

Solder

3.1

2.53.53.54.4

040B0029

Oil seperator, Type OUB

Ordering

Table 4: OUB 1 / OUB 4

Table 5: OUB 1s

(1)

(1)

1

1

⁄4 in. are connection to oil return line

⁄4 in. are connection to oil return line

(2)

(2)

6mm ODF solder connection to oil return line

6mm ODF solder connection to oil return line

© Danfoss | Climate Solutions | 2021.02 AI213886423775en-000801 | 6

Document name

Document type

Document topic

Approval authority

RU Д-DK.БЛ08.B.00828_19

EAC Declaration

Machinery & Equipment

EAC

040B0625.AA

Manufacturers Declaration

PED-UL SA3736

Mechanical - Safety Certicate

-UL034R9541.AA

Manufacturers Declaration

China RoHS

-

034L9630.AA

Manufacturers Declaration

ATEX

-

Oil seperator, Type OUB

Certicates, declarations and approvals

The list contains all certicates, declarations, and approvals for this product type. Individual code number may have
some or all of these approvals, and certain local approvals may not appear on the list.

Some approvals may change over time. You can check the most current status at danfoss.com or contact your local
Danfoss representative if you have any questions.

Table 6: Certicates, declarations and approvals

© Danfoss | Climate Solutions | 2021.02 AI213886423775en-000801 | 7

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