hubata seals - pneumatic seals catalogue · 2015-04-17 · 1 contents 2 pneumatic sealing elements...

www.hubata-seals.com

Pneumatic seals

1

Contents

2 Pneumatic sealing elements

3 Application examples

4 Individual description (Pneumatic piston seals)

11 Individual description (Pneumatic rod seals)

PneumatiC 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.

2

For sealing elements used for pneumatic cylinders, minimum friction forces and maximum sealing features should bе provided. Therefore, they differ from other sealing elements used in hydraulic systems. Compared with hydraulic cylinders, for pneumatic cylinders there is the requirement of operating in non-oiled and sometimes inadequate-oiled conditions at higher linear velocity with less pressures. Therefore, the dynamic sealing lips (contact surface), preload and material hardness which are of sealing elements designed for pneumatic cylinders should bе different.

Hubata Seals trades with the following pneumatic sealing elements: PSP K25, PSP K50, PSP K54, PSP K55 and PSP K57 are used as piston seal, PSR K30, PSR K51, PSR K52 NBR/TPU and PSR K56 as combi seal and PSR K53 NBR, PSR K53 TPU are used as the sealing element for pneumatic cushioning seal.

The necessary dimensions of general tolerances and chamfers are given below.

PneumatiC SealinG elementS

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

a Inner/Outer diameter (mm)

2 < 20

3 20–49

4 50–99

5 100–159

6 160–249

7 250–400

8 > 400

3

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.

aPPliCatiOn eXamPleS

4

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: ≤ 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

5


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

6


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

Media Dried and conditioned air

Temperature -20 °C, +100 °C Air

Operating pressure ≤ 12 Bar

Linear velocity ≤ 1 m/sn

Surface Roughness RtSliding 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

7


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.






Surface Roughness RtSliding 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

8


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.






Surface RoughnessSliding surface 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

9


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.


Material TPU/POM/ALU/MAGNET

Media Lubrication free Pressurized dry air

Temperature -25 °C, +80 °C




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

10


The compact, u-ring with asymmetrical profile

and a special pneumatic sealing edge on the

dynamic sealing lip.


Material NBR80

Media Lubrication free Pressurized dry air

Temperature -30 to 105





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

11

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.








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

12


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.


Material TPU90 Shore A

Media Lubrication free, pressurized dry air






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

13


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.

Operating Conditions nBR tPuMaterial NBR90 Shore A TPU90 Shore A

Media Conditioned air Lubrication free, pressurized dry air


Operating pressure ≤ 16 Bar ≤ 16 Bar




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

14


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 nBRMaterial TPU90 Shore A NBR90 Shore A

Media Lubrication free, pressurized dry air Conditioned dry air


Operating pressure 16 Bar 16 Bar




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

15


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.








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

HeaD OFFice18, Rozhen blvd.; 1220 Sofia, Bulgaria tel.: +359 2 8378 499, 8378 599 fax: +359 2 8376 599 [email protected]

OFFice PlOVDiV8, 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

hubata seals - pneumatic seals catalogue · 2015-04-17 · 1 contents 2 pneumatic sealing elements...

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