Pneumatic seals

www.hubata-seals.com

Pneumatic Seals Contents

2

Pneumatic sealing elements

3

Application examples

4

Individual description

11

(Pneumatic piston seals)

Individual description



(Pneumatic rod seals)

The purpose of this catalogue is to present standard seals dimensions. For information about stock availabilities, please contact our sales department. We are able to supply other dimensions required.

1

PNEUMATIC SEALING ELEMENTS

For sealing elements used for pneumatic

Hubata Seals trades with the following

cylinders, minimum friction forces and

pneumatic sealing elements: PSP K25, PSP

maximum sealing features should bе

K50, PSP K54, PSP K55 and PSP K57 are used

provided. Therefore, they differ from other

as piston seal, PSR K30, PSR K51, PSR K52 NBR/

sealing elements used in hydraulic systems.

TPU and PSR K56 as combi seal and PSR K53

Compared with hydraulic cylinders, for

NBR, PSR K53 TPU are used as the sealing

pneumatic cylinders there is the requirement

element for pneumatic cushioning seal.

of operating in non-oiled and sometimes inadequate-oiled conditions at higher linear

The necessary dimensions of general

velocity with less pressures. Therefore, the

tolerances and chamfers are given below.

dynamic sealing lips (contact surface), preload and material hardness which are of sealing elements designed for pneumatic cylinders should bе different.

Material

Tolerance

Cylinder

St, Ms, Al, GFK

H11 / H12

Rod

St

f8 *

Housing

St, Ms, Al, Plastic

Rod ** Piston ** Guide H8 / h8

Surface Roughness

Machining

Cylinder

Rmax ≤ 4 µm

Honing

Rod

Rmax ≤ 4 µm

Grinding / Burnishing *

Housing

Rmax ≤ 10 µm

Turning Burnishing

* Hardening (55-60 HRC) and hard chroming with 30 µm thickness. ** According to seal type.

Chamfers in pneumatic system

2

a

Inner/Outer diameter (mm)

2

< 20

3

20–49

4

50–99

5

100–159

6

160–249

7

250–400

8

> 400

APPLICATION EXAMPLES

In this simple double acting pneumatic cylinder design, PSP K25 double acting pneumatic piston seal is used as pneumatic piston seal and PSR K30 pneumatic combi seal is used as pneumatic rod seal.

For this application, PSP K50 TPU as piston seal, PSR K51 TPU rod seal for rod sealing, and PSR K53 TPU cushioning seal for cushioning seal are used. During operation, pressurized air acting on line A makes piston and rod move to the left. At this moment the air in the other side of the piston is exhausted on line B. By the contact of D cushioning rod with cushioning seal, the exhausting procedure from line B becomes stopped. At this moment, exhausting procedure is only performed over C flow control valve in a controlled way. By this way, the movement of cylinder gets slowed down.

3

PSP K25 PNEUMATIC PISTON SEAL They are the seals used in pneumatic systems with an easy assembly. Produced by bonding NBR on the metal, the PSP K25 types are designed in such a way that they can be used without piston. They are fitted on the rod with bolt and shoulder. FKM (Viton) PSP K25 seals are offered and produced as special orders.

Operating conditions Media:

Dried and conditioned air

Temperature:

-30 °C, +105 °C

Operating pressure: ≤ 12 Bar Linear velocity:

4

≤ 1 m/sn

D

d

B

D1

S

S1

25

8

12

14.5

3

4

32

8

15

16

3

4

40

10

18

23

4

5

50

10

18

29

4

5

63

12

22

40.5

5

6

70

12

22

47

5

6

80

16

25

55

5

6.5

90

16

25

65

5

6.5

100

16

25

75

5

6.5

110

18

25

85

6

7.5

125

20

30

90

8

10

140

20

30

95

10

12

150

20

30

105

10

12

160

27

31

115

10

12

180

27

31

135

10

12

200

27

35

150

12

15

250

30

35

200

12

16.5

320

36

40

278.5

15

18.6

PSP K50 PNEUMATIC PISTON SEAL Produced by injection moulding technique from special polyurethane material, or NBR 80 Shore A, the PSP K50 pneumatic piston nutrings are designed specially for pneumatic cylinders with its dynamic sealing lips (external sealing lips) having shorter height. It provides a safe static sealing when its internal sealing lips are installed in housing. Being able to be used in all pneumatic cylinders suitable to all technical properties given below, the PSP K50 type series can be provided from our stocks.

Operating Conditions

NBR

TPU

Material

NBR80 Shore A

TPU80 Shore A

Media

Conditioned air

Lubrication free Pressurized dry air

Temperature

-30 °C, +105 °C

-30 °C, +80 °C

Operating pressure

≤ 12 Bar

≤ 16 Bar

Linear velocity

≤ 1 m/sn

≤ 1 m/sn

Surface Roughness Sliding surface

Rmax ≤ 4 µm

Housing surface

Rmax ≤ 10 µm

NBR

TPU

D

d

B

b

●

●

32

24

6.0

5.5

●

●

40

30

7.5

7.0

●

●

50

40

7.5

7.0

●

●

63

53

7.5

7.0

●

●

80

68

9.5

8.5

●

●

100

88

9.5

8.5

●

●

125

110

11

10

5

PSP K54 PNEUMATIC PISTON SEAL Designed and produced as a piston seal suitable for pneumatic cylinders and valves, PSP K54 seals are used frequently in especially short stroke cylinders because of its easy assembly and low friction feature. Manufactured with NBR70 Shore A, PSP K54 pneumatic piston seal can also be produced with FKM for the specials applications.

Operating Conditions

6

Media

Dried and conditioned air

Temperature

-20 °C, +100 °C Air

Operating pressure

≤ 12 Bar

Linear velocity

≤ 1 m/sn

Surface Roughness

Rt

Sliding surface

≤ 4 µm

Housing surface

≤ 10 µm

D

d

b

B

r

12

7

2.0

2.5

0.2

16

9

2.1

2.5

0.2

20

13

2.1

2.5

0.2

25

18

2.1

2.5

0.2

28

19

2.5

3.0

0.2

30

21

2.5

3.0

0.2

32

23

2.5

3.0

0.2

35

26

2.5

3.0

0.2

40

31

2.5

3.0

0.2

45

36

2.5

3.0

0.2

50

41

2.5

3.0

0.2

63

51

3.4

4.0

0.2

80

68

3.4

4.0

0.2

100

88

3.4

4.0

0.2

125

110

4.4

5.0

0.2

PSP K55 PNEUMATIC PISTON SEAL Being used safely up to 12 bars in single acting and short stroke pneumatic cylinders, PSP K55 pneumatic piston seals are made up of aluminium plate and NBR material. They can be used in single acting and short stroke pneumatic cylinders, where there is not too much radial load. Due to its design with air relief notches they also function as cushioning at the end of strokes.

Operating Conditions Media

Dried and conditioned air

Temperature

-30 °C, +105 °C Air

Operating pressure

≤ 12 Bar

Linear velocity

≤ 1 m/sn

Surface Roughness

Rt

Sliding surface

≤ 4 µm

D

d

B

b

h

s

d2

d3

16

4.5

4.4

3.4

2.3

2

6.9

13.2

20

6

5.5

4.4

2.8

2.5

9.4

17

25

7

6.4

5.4

3.5

3

10.8

21.2

32

8

7.5

6.0

3.5

3

12.5

27

40

8

8.5

7.0

4.5

4

17

34.9

50

10

10

8.0

4.5

4

26

43.9

63

12

10

8.0

4.5

4

26

56.6

80

16

11.4

9.0

5.5

5

30

72

100

20

12.9

10.9

6.5

6

35

91

7

PSP K57 PNEUMATIC PISTON SEAL Being used safely up to 12 bars in double acting and short stroke pneumatic cylinders, PSP K57 pneumatic piston seals are made up of metal and NBR material. They can be used in double acting and short stroke pneumatic cylinders, where there is not too much radial load. Due to its design with air relief notches they also function as cushioning at the end of strokes.

Operating Conditions Media

Dried and conditioned air

Temperature

-30 °C, +105 °C Air

Operating pressure

≤ 12 Bar

Linear velocity

≤ 1 m/sn

Surface Roughness Sliding surface

8

Rmax ≤ 4 µm

D

d

H1

H2

s1

s2

d2

d3

12

4.5

6

4

2.3

2

6.9

9.4

25

7

8.8

7

3.5

3

10.8

21.2

32

8

11

8

3.5

3

12.5

27

40

8

11.8

8.8

4.5

4

17

34.9

50

10

14

10

4.5

4

26

43.9

63

12

14

10

4.5

4

26

56.6

80

16

16

12

5.5

5

30

72

100

20

18

14

6.5

6

35

91

PSP K58 PNEUMATIC PISTON SEAL The compact, short, complete pneumatic piston consist of an aluminum body, guide strip, a magnet and the sealing body with a special sealing edge on the sealing lip and integrated buffers made of very wear resistant polyurethane.

Operating Conditions Material

TPU/POM/ALU/MAGNET

Media

Lubrication free Pressurized dry air

Temperature

-25 °C, +80 °C

Operating pressure

≤ 12 Bar

Linear velocity

≤ 1 m/sn

Surface Roughness Sliding surface

Rmax ≤ 4 µm

DN

d

H

32

8,1

14

40

8,1

15

50

10,1

15,5

63

10,1

19

80

12,1

21,5

100

17,1

25,5

9

PSP K59 PNEUMATIC PISTON SEAL The compact, u-ring with asymmetrical profile and a special pneumatic sealing edge on the dynamic sealing lip.

Operating Conditions Material

NBR80

Media

Lubrication free Pressurized dry air

Temperature

­-30 to 105

Operating pressure

≤ 12 Bar

Linear velocity

≤ 1 m/sn

Surface Roughness

10

Sliding surface

Rmax ≤ 4 µm

Housing surface

Rmax ≤ 10 µm

D

d

B

H

8

4,8

2,3

2,7

10

6

2,55

3

12

7

2,55

3

16

10

2,55

3

20

14

2,55

3

25

19

3,25

3,5

32

24

3,25

3,5

40

32

3,25

3,5

50

42

3,25

3,5

63

53

4,25

4,5

80

70

4,25

4,5

100

90

4,25

4,5

PSR K30 PNEUMATIC ROD SEAL It is a pneumatic combined rod seal consisting of an NBR nutring lip for pneumatic applications and wiper (dust) ring supported by a metal ring. PSR K30 are also produced with FKM for special applications.

Operating Conditions Media

Dried and conditioned air

Temperature

-30 °C, +105 °C

Operating pressure

≤ 16 Bar

Linear velocity

≤ 1 m/sn

Surface Roughness Sliding surface

Rmax ≤ 4 µm

Housing surface

Rmax ≤ 10 µm

d

D

a

b

D1

B

r

10

17

7

9.5

19

8.5

1.1

12

22

7

9.5

24

8.5

1.1

14

24

7

9.5

26

8.5

1.1

16

26

7

9.5

28

8.5

1.1

20

30

7

9.5

32

8.5

1.1

25

35

7

9.5

37.5

8.5

1.4

30

40

7

9.5

42.5

8.5

1.4

32

42

7

9.5

44.5

8.5

1.4

35

45

7

9.5

47.5

8.5

1.4

40

50

7

9.5

52.5

8.5

1.4

45

55

7.3

9.2

57.5

8.5

1.4

50

60

7

9.5

62.5

8.5

1.4

11

PSR K51 PNEUMATIC ROD SEAL Produced by injection moulding technique with special TPU material, the PSR K51 combi seal perform an absolute sealing with its dynamic nutring sealing lips and its joint dust (wiper) lips. It is provided to be easily assembled into special design open seal housing. Being used safely for all pneumatic cylinders, PSR K51 series can be provided from our stocks.

Operating Conditions Material

TPU90 Shore A

Media

Lubrication free, pressurized dry air

Temperature

-30 °C, +80 °C

Operating pressure

≤ 16 Bar

Linear velocity

≤ 1 m/sn

Surface Roughness

12

Sliding surface

Rmax ≤ 4 µm

Housing surface

Rmax ≤ 10 µm

d

D

b

b1

B

B1

ØD1

r

12

22

10.4

7

13

7.5

24.2

1.1

16

26

10.4

7

13

7.5

28.2

1.1

18

28

10.4

7

13

7.5

30

1.1

20

30

10.4

7

13

7.5

32.2

1.1

25

35

10.4

7.3

13

8

37.8

1.4

32

42

10.4

7.3

13

8

44.8

1.4

40

50

10.4

7.3

13

8

52.8

1.4

50

60

10.4

7.7

13

8.5

63.6

1.8

PSR K52 PNEUMATIC ROD SEAL Designed specially for the cases necessary for sealing of very small areas in short stroke pneumatic cylinders, PSR K52 type seals provide maximum sealing with its small housing measures and minimum friction force. Produced normally with standard material NBR90 Shore A and TPU90 Shore A, PSR K52 is also produced with FKM as special order.

NBR

Operating Conditions

TPU

Material

NBR90 Shore A

TPU90 Shore A

Media

Conditioned air

Lubrication free, pressurized dry air

Temperature

-30 °C, +105 °C

-30 °C, +80 °C

Operating pressure

≤ 16 Bar

≤ 16 Bar

Linear velocity

≤ 1 m/sn

≤ 1 m/sn

Surface Roughness Sliding surface

Rmax ≤ 4 µm

Housing surface

Rmax ≤ 10 µm

NBR

TPU

d

D

a

A

D1

•

•

4

8.2

4

3

6.5

•

•

6

11.2

5

4

9

•

•

8

14.2

5

4

12

•

•

10

16.2

5.5

4.5

14

•

12

16.5

4

4

13.7

•

16

20.5

4

4

17.7

•

20

25

4.6

4.6

21.9

•

25

30

4.6

4.15

26.9

13

PSR K53 PNEUMATIC ROD SEAL Produced by injection moulding technique from TPU material or NBR90 Shore A, PSR K53 series can be used safely in the applications requiring cushioning seals in pneumatic cylinders.

Operating Conditions

TPU

NBR

Material

TPU90 Shore A

NBR90 Shore A

Media

Lubrication free, pressurized dry air

Conditioned dry air

Temperature

-30 °C, +80 °C

-30 °C, +105 °C

Operating pressure

16 Bar

16 Bar

Linear velocity

≤ 1 m/sn

≤ 1 m/sn

Surface Roughness Sliding surface

Rmax ≤ 4 µm

Housing surface

Rmax ≤ 10 µm

NBR

TPU

d

D

D1

D2

d1

a1

a2

A

•

•

12

18

13

15.5

8

4.1

5

4.8

•

•

12

20

13

17

8

6.2

8

7

•

•

14

22

15

19

10

6.3

7.8

7

•

•

16

22

17

19.5

12

4.5

5.5

5.2

•

•

16

24

17

21

12

6.2

8

7

•

•

20

28

21

25

16

6.2

8

7

•

•

24

32

25

28

20

6.2

8

7

•

•

25

33

26

29

20

6.2

8

7

•

•

30

40

31.5

35

26

6.2

8

7

•

•

36

46

37.5

41

32

6.2

8

7

•

•

40

50

41.5

45

32

6.2

7.8

7

•

50

60

51.5

55

40

6.2

7.8

7

•

50

67

53

58

40

11

11

12.5

•

57

74

60

65

50

11

11

12.5

•

70

87

73

78

63

11

11

12.5

14

PSR K56 PNEUMATIC ROD SEAL Constructed with 80 Shore A NBR ring and thermoplastic elastomer (HYTREL) ring, PSR K56 pneumatic rod seal can be used safely in heavy duty applications with its scraper lip on thermoplastic elastomer ring. For special applications, a combination of Viton and Teflon with bronze can be used.

Operating Conditions Media

Dried and conditioned air

Temperature

-30 °C, +80 °C

Operating pressure

≤ 16 Bar

Linear velocity

≤ 1 m/sn

Surface Roughness Sliding surface

Rmax ≤ 4 µm

Housing surface

Rmax ≤ 10 µm

d

D

b

b1

B

B1

D1

r

12

22

11

7

13

7.7

24

1.1

16

26

11

7

13

7.7

28

1.1

20

30

11

7

13

7.7

32

1.1

25

35

11.5

7.3

13

8

37.5

1.4

32

42

11.5

7.3

13

8

44.5

1.4

40

50

11.5

7.3

13

8

52.5

1.4

45

55

12.5

7.7

15

8.6

58.2

1.8

50

60

14.5

7.7

15

8.6

63.2

1.8

63

75

13

8.6

16

9.6

78.2

1.8

15

HEAD OFFICE 18, Rozhen blvd.; 1220 Sofia, Bulgaria tel.: +359 2 8378 499, 8378 599 fax: +359 2 8376 599 [email protected]

OFFICE PLOVDIV 8, Peshtersko shouse blvd.; 4002 Plovdiv, Bulgaria tel.: +359 32 640 654 fax: +359 32 640 654 [email protected]

www.hubata-seals.com

PS.2011.09-02