The Production of Hydraulic and ... - SITTECH HYDRAULIKA · CUSTOM-MADE SOLUTION AS PER THE...

The Production of Hydraulic and Pneumatic Seals

sittech-hydraulika.cz

Hydraulic Cylinder

Piston seals

The piston guiding ring

Static seals

Piston seals

Static seals

O-ring

Scraping rings

The piston rod guiding ring

Piston rod seals

2 Use

CUSTOM-MADE SOLUTION AS PER THE CUSTOMERCNC custom-made production of:n Hydraulic and pneumatic sealsn Rotation sealsn Static sealsn Seals for special applications n Plastic and rubber segmentsn Atypical profiles programmed as requiredn Production as per the drawing or assigned construction dimensionsn We produce up to Ø 580 mm, upon cooperation, we deliver up to Ø 2000 mm

SOLUTION FOR EACH OPERATIONMaterials:n Rubber, polyurethane, plastic materialsn Resistance to most agents of hydraulic liquid, gases, chemicals pH 0-14 and othersn Temperature resistance from -260 to +260 °C as per material

WE PROVIDE FOR MOST OF YOUR DIMENSIONAL REQUIREMENTSMachine equipment: n CNC SML260 for products up to Ø 260 mmn CNC SML600 for products up to Ø 580 m

ANYONE CAN BE OUR CUSTOMER: FROM ENTREPRE-NEURS TO LARGE CORPORATIONSTypes of products:n Individual piecesn Limited series production

YOU WILL SAVE TIME AND PREVENT LOSSES FROM PRODUCTION DOWNTIMEProduction times:n Exceptional events and emergencies within hoursn Common obligations within days

In case that your required seal or material is not in our catalogue, contact our technicians. Based on the required parameters, we can deliver a different technical solution.

FLEXIBLE – OPERATIONAL – FAST

…PROBLEM SOLVING DURING PRODUCTION AND MAINTENANCE

3Contents/Profile

Contents

SITTECH HYDRAULIKA, s.r.o.A COMPREHENSIVE SOLUTION FOR YOUR PRODUCTION AND MAINTENANCE

Hydraulic Cylinder .......................................................................2SITTECH HYDRAULIKA, s.r.o. ....................................................3Piston Seals ....................................................................................4Piston Rod Seals ...........................................................................6Scraping Rings ..............................................................................8Universal Seals ..............................................................................9Support Rings ............................................................................ 10Guiding Rings ............................................................................ 10Rotational Seals ......................................................................... 11Static Seals and O-rings ......................................................... 12Mining Seals ............................................................................... 13Recommendation For the Piston Seal Location ............ 14Recommendation for the Piston Rod Seal’s Location . 15

Recommendation for Setting the Scraping Rings ........ 18Recommendation for Setting the Rotation Sealing .... 21Recommendation for Setting the O-rings ....................... 22Recommendation for Setting the Guiding Rings ......... 23Chemical Resistance ................................................................ 24Plastic materials ........................................................................ 24Semi-products ........................................................................... 25Polyurethane materials .......................................................... 25Elastomers ................................................................................... 25Physical Properties ................................................................... 26Material table ............................................................................. 28Temperature range .................................................................. 30The Questionaire for Demand and Order ........................ 31

Profile 3D profile Type Standard material

Pressure (bar)

Temperature (°C)

Speed(m/sec)

PS01PU

NBRFPM

400160160

-30 to +105-25 to +100- 20 to +210

0,5

PS01APU

NBRFPM

160160160

-30 to +105-25 to +100- 20 to +210

0,5

PS01BPU

NBRFPM

460160160

-30 to +105-25 to +100- 20 to +210

0,5

PS02PU/POM

NBR/POMFPM/PTFE

700250250

-30 to +105-25 to +100- 20 to +210

0,5

PS02APU/POM

NBR/POMFPM/PTFE

700250250

-30 to +105-25 to +100- 20 to +210

0,5

PS03 PU/NBR 400 -25 to +100 0,5

PS04 PU/NBR/POM 700 -25 to +100 0,5

PS05PU

NBR25

-30 to +105-25 to +100

1

PS08PU-D57/NBR

PTFE/NBR250400

-25 to +1001

15

PS08BPU-D57/NBR

PTFE/NBR250400

-25 to +1001

10

PS08C PTFE/NBR 400 -25 to +100 2

PS08D PTFE/NBR 400 -25 to +100 3

PS08EPU-D57/NBR

PTFE/NBR250400

-25 to +1001

10

4

Piston Seals

„PS“ Profiles

5 „PS“ Profiles

Piston Seals


Pressure (bar)

Temperature (°C)

Speed(m/sec)

PS08F PU-D57/NBR 250 -25 to +100 0,5

PS081PU-D57/NBR

PTFE/NBR250400

-25 to +1001

10

PS09 PU/NBR/POM 400 -25 to +100 0,5

PS16 NBR 160 -25 to +100 0,5

PS17PU/POM

NBR/POM400250

-25 to +100 0,5

PS19 PTFE-F/V-spring 160 -200 to +260 15

PS20 NBR/POM 700 -25 to +100 0,5

PS23 PU/NBR/POM 400 -25 to +100 0,5

PS35 PU 400 -30 to +105 0,4

All seal types up to the external diameter of 1,500 mm are available without delay.

All profiles can be adjusted to specific work conditions.

All herein specified application parameters represent the maximum values of various material combinations. We do not recommend reaching the maximum values in more than one attribute.

Note


Pressure (bar)

Temperature (°C)

Speed(m/sec)

RS01PU

NBRFPM

400160160

-30 to +105-25 to +100- 20 to +210

0,5

RS01APU

NBRFPM

160160160

-30 to +105-25 to +100- 20 to +210

0,5

RS01BPU

NBRFPM

400160160

-30 to +105-25 to +100- 20 to +210

0,5

RS02PU/POM

NBR/POMFPM/PTFE

700250250

-30 to +100-25 to +100- 20 to +210

0,5

RS02APU/POM

NBR/POMFPM/PTFE

700250250

30 to +100-25 to +100- 20 to +210

0,5

RS03 PU/NBR 400 -25 to +100 0,5

RS04 PU/NBR/POM 700 -25 to +100 0,5

RS05PU

NBR25

-30 to +105-25 to +100

1

RS08PU

NBR400160

-25 to +100 0,3

RS09PU-D57/NBR

PTFE/NBR250400

-25 to +1001

10

RS09APU-D57/NBR

PTFE/NBR250400

-25 to +1001

10

6

Piston Rod Seals

„RS“ Profiles

7 „RS“ Profiles

Piston Rod Seals


Pressure (bar)

Temperature (°C)

Speed(m/sec)

RS09BPU-D57/NBR

PTFE/NBR250400

-25 to +1001

10

RS91PU-D57/NBR

PTFE/NBR250400

-25 to +1001

10

RS16 NBR 160 -25 to +100 0,5

RS17 PU 400 -30 to +105 0,5

RS17A PU/POM 700 -30 to +100 0,5

RS17B PU/NBR 400 -25 to +100 0,5

RS17C PU/NBR/POM 700 -25 to +100 0,5

RS17DPU

NBR400160

-30 to +105-25 to +100

0,3

RS19 PTFE/V-Spring 160 -200 to +260 15

RS20 NBR/POM 700 -25 to +100 0,5

The sealing geometry displayed in the profile tables represents standard profiles.

Our special production technology also allows for the very fast supply of special sealing tools for exceptional applications.

Note


Pressure (bar)

Temperature (°C)

Speed(m/sec)

WR01PU

NBR–

-30 to +105-25 to +100

4

WR01APU

NBR–

-30 to +105-25 to +100

4

WR02PU

NBR–

-30 to +105-25 to +100

4

WR02APU

NBR–

-30 to +105-25 to +100

4

WR02BPU

NBR–

-30 to +105-25 to +100

4

WR02CPU

NBR–

-30 to +105-25 to +100

4

WR03PU/POM*

NBR/POM*–

-30 to +105-25 to +100

4

WR04PU

NBR–

-30 to +105-25 to +100

4

WR11PU

NBR–

-30 to +105-25 to +100

4

WR12PU

NBR–

-30 to +105-25 to +100

4

WR13 PTFE/NBR – -25 to +100 10

WR13_E2 PTFE/NBR – -25 to +100 10

WR14 PTFE/NBR – -25 to +100 10

WR15 PTFE/NBR – -25 to +100 10

WR17PU

NBR–

-30 to +105-25 to +100

4

WR18PU

NBR–

-30 to +105-25 to +100

4

*) Due to technical reasons, POM (polyacetal polymer) should be used at up to the maximum temperature of 80°C. For higher temperatures we recommend aluminium/steel.

8

Scraping Rings

„WR“ Profiles

9„PRS“ Profiles

Universal Seals


Pressure (bar)

Temperature (°C)

Speed(m/sec)

PRS06PU

NBR400160

-30 to +105-25 to +100

0,5

PRS06APU

NBR160160

-30 to +105-25 to +100

0,5

PRS06BPU

NBR400160

-30 to +105-25 to +100

0,5

PRS06CPU

NBR160160

-30 to +105-25 to +100

0,5

PRS06DPU

NBR160160

-30 to +105-25 to +100

0,5

PRS07 PU/NBR 400 -25 to +105 0,5

PRS10SPPU

FPMPOM

–-30 to +105-20 to +210-60 to +100

–

PRS18 PU/NBR 400 -25 to +100 0,5

PRS19BPTFE/Helicoil

Spring160 -60 to +200 15

PRS22PU/POM

NBR/POMFPM/PTFE

400160160

-30 to +100-25 to +100-20 to +210

0,5

PRS99PU

NBRFPM

400160160

-30 to +100-25 to +100-20 to +210

0,5

PRS10-12PU/POM

NBR/POM500250

-30 to +100-25 to +100

0,5


Pressure (bar)

Temperature (°C)

Speed(m/sec)

BUR08PU

NBRPTFE

–-30 to +105-60 to +100

-200 to +260–

BUR09PU

NBRPTFE

–-30 to +105-60 to +100

-200 to +260–

BUR10PU

NBRPTFE

–-30 to +105-60 to +100

-200 to +260–

BUR11PU

NBRPTFE

–-30 to +105-60 to +100

-200 to +260–

BUR12PU

NBRPTFE

–-30 to +105-60 to +100

-200 to +260–

BUR13PU

NBRPTFE

–-30 to +105-60 to +100

-200 to +260–

10

Support Rings

„BUR/BWR“ Profiles


Pressure (bar)

Temperature (°C)

Speed(m/sec)

BWR01POMPTFE

Polyester fiber–

-60 to +100-200 to +260-40 to +130

4

BWR02POMPTFE

–-60 to +100

-200 to +2604

BWR03POMPTFE

–-60 to +100

-200 to +2604

BWR04POMPTFE

–-60 to +100

-200 to +2604

BWR05POMPTFE

–-60 to +100

-200 to +2604

BWR06POMPTFE

–-60 to +100

-200 to +2604

BWR07POMPTFE

–-60 to +100

-200 to +2604

BWR08POMPTFE

–-60 to +100

-200 to +2604

Guiding Rings

11 „OS/R/VR/RS/PS“ Profiles

Rotational Seals


Pressure (bar)

Temperature (°C)

Speed(m/sec)

OS01PU/POM*

NBR/POM*FPM/PTFE

0,50,50,5

-30 to +100-25 to +100-20 to +210

510-25

OS02PU/POM*

NBR/POM*FPM/PTFE

0,50,50,5

-30 to +100-25 to +100-20 to +210

510-25

OS08 NBR – -25 to +100 10

R03PU/POM

NBR/POM400250

-30 to +100-25 to +100

0,20,2

R04PU

NBR160100

-30 to +105-25 to +100

0,20,2

R04APU

NBR160100

-30 to +105-25 to +100

0,20,2

R05PU*

NBR*160100

-30 to +105-25 to +100

0,20,2

R05APU

NBR160100

-25 to +1000,20,2

VR06 NBR – -25 to +100 25

VR07 NBR – -25 to +100 25

R08 PTFE/NBR 350 -25 to +100 0,4

R09 PTFE/NBR 350 -25 to +100 0,4

R10 PTFE/NBR 350 -25 to +100 0,4

R11 PTFE/NBR 350 -25 to +100 0,4

RS19A PTFE/V-spring 150 -200 to +260 2

PS19A PTFE/V-spring 150 -200 to +260 2

*) For higher temperatures we recommend using aluminium or steel.


Pressure (bar)

Temperature (°C)

Speed(m/sec)

FL01APU

NBREPDM

400250250

-30 to +105-25 to +100

4

FL02BPU

NBREPDM

400250250

-30 to +105-25 to +100

4

12

Static Seals and O-rings

„FL/OR/ORH/ORV/QR/SS“ Profiles


Pressure (bar)

Temperature (°C)

Speed(m/sec)

ORPU

NBRFPM

600160160

-30 to +105-20 to +100-20 to +210

–

ORHPU

NBRFPM

600160160

-30 to +105-20 to +100-20 to +210

–

ORVPU

NBRFPM

600160160

-30 to +105-20 to +100-20 to +210

–


Pressure (bar)

Temperature (°C)

Speed(m/sec)

QR01PU

NBRFPM

600160160

-30 to 105-20 to 100-20 to 210

–

SS01PU

NBRFPM

600160160

-30 to 105-20 to 100-20 to 210

–

In addition to the above stated standard profiles, we also supply special profiles and machined products corresponding to a customer’s drawings, or in compliance with the application: using our specially developed geometry.

Note

13 „P/R/W/BWR“ Profiles

Mining Seals


Pressure (bar)

Temperature (°C)

Speed(m/sec)

P50 PU/POM400 dyn.

1500 stat.**-30 to +100 0,5/0,2

P51 PU/NBR/POM400 dyn.

1500 stat.**-25 to +100 0,5/0,2

P51G PU/NBR/POM400 dyn.

1500 stat.**-25 to +100 0,5/0,2

P52 PU/POM700 dyn.

1500 stat.**-30 to +100 0,5/0,2


1500 stat.**-25 to +100 0,5/0,2


1500 stat.**-25 to +100 0,5/0,2

R50 PU/NBR/POM 700 -25 to +100 0,5

R51 PU/NBR 400 -25 to +100 0,5

R52 PU/POM 700 -30 to +100 0,5

R53 PU 400 -30 to +100 0,5

W50 PU – -25 to +105 2

W51 PU – -25 to +100 2

W53 PU/POM* – -25 to +100 2

W54 PU – -25 to +100 2

BWR01-PBWR01-R

POMPTFE

–-60 to +100

-200 to +2604

P58 PU 400 -30 to +100 0,3

*) Due to technical reasons, POM (polyacetal polymer) should be used up to a maximum temperature of 80°C. For higher temperatures, we recommend aluminium/steel. **) Maximum permitted pressure for dynamic and static applications depends on the profile design.

The specified dimensions are necessary for order processing:

ØD ................external diameterØd................. internal diameterL .....................added construction length

The seal’s location tolerance:Ø d h10ØD H9

Surface roughness R tmax(µm)

Ra(µm)

Sliding surface PU/rubber seals

≤ 2,5 ≤ 0,1–0,5

Sliding surface PTFE seals ≤ 2 ≤ 0,05–0,3

The groove bottom ≤ 6,3 ≤ 1,6

The groove front ≤ 15 ≤ 3

Bearing surface type > 50% ≤ 95%

Simple ordering procedure PS01 PUR 100 × 80 × 12

Profile Material Built-in construction dimensions

PS01 PS02PS03PS04PS05PRS06PRS07PS20PS35

Main application:The reinforcement and securing cylinders, standard cylinders Advantages:Stable securing in the groove, perfect sealing efficiency, wide temperature scopeStandard materials:PUR, NBR and other rubber types

PS08PS23

Main application:Common cylinders for positioning functions, mobile hydraulics, etc.Advantages:Low friction, no jerky movement, excellent resistance to pressure surgesStandard materials:PTFE / NBR , PTFE / Viton

PS09PS17

Main application:Reinforcement and securing of cylinders, standard cylindersAdvantages:Excellent static and dynamic sealing features, integrated guiding ringsStandard materials:PUR or NBR / POM

Recommendation For the Piston Seal Location

14 „PS/PRS“ Profiles

15 „RS/PRS“ Profiles

ØD Ød L c/s

5–24,9 ØD-8 6 4

25–49,9 ØD-10 7 5

50–74,9 ØD-12 8 6

75–149,9 ØD-16 10 8

150–299,9 ØD-20 12 10

300–500 ØD-24 18 12

500–700 ØD-30 20 15

> 750 ØD-40 26 20

Recommendation for the Piston Rod Seal’s Location

The list below includes our recommendations for the standard placement. We are able to produce any non-standard setting, as per your specific requirements.

Recommendations for the placement of single-acting piston rod seal types with sleeves (U-casing) compact seals.

Ø Ød L c/s

8–14,9 ØD-4,9 2,2 2,45

15–39,9 ØD-7,5 3,2 3,75

40–79,9 ØD-11 4,2 5,5

80–132,9 ØD-15,5 6,3 7,75

133–329,9 ØD-21 8,1 10,5

330–669,9 ØD-24,5 8,1 12,25

670–1 000 ØD-28 9,5 14*

> 1 000 ØD-28 9,5 14*

*) only profiles PS08E and PS08F

The list below includes our recommendations for standard location. We are able to produce any non-standard settings as per your specific requirements.

Recommendations for setting single/double acting piston seals, O-ring activated PTFE (PU) seals.

Ø Ød Ød1 L* L1*

20–49,9 ØD-10 ØD-3 12,5 20,5

50–79,9 ØD-15 ØD-4 20 28

80–149,9 ØD-20 ØD-5 25 36

150–399,9 ØD-25 ØD-6 32 46

400–750 ØD-30 ØD-8 36 50

> 750 ØD-40 ØD-8 40 54

The below list includes our recommendations for standard location. We are able to produce any non-standard setting as per your specific requirements.

Recommendations for setting double acting compact piston seal types.

The specified dimensions are ne-cessary for the order processing:

ØD ................external diameterØd................. internal diameterL .....................added construction length

The seal’s location tolerance:Ø d f8ØD H10


Ra(µm)

Sliding surface PU/RUBBER seals

≤ 2,5 ≤ 0,1–0,5




Bearing surface type >50% ≤ 95%

Simple ordering procedure RS01 PUR 50 × 65 × 11,4


RS01 RS02RS03RS04RS05RS06RS07RS17RS18RS19RS35

Main application:Standard cylinders, light and standard hydraulic applicationsAdvantages:Stable arrestment in the groove,Perfect sealing efficiency,wide temperature range, excellent Ability of return pumpingStandard materials:PUR, rubber

RS09 Main application:Machines for civil works, heavy HydraulicsAdvantages:Excellent resistance to pressure surges, long service lifeStandard materials:PTFE / NBR, PTFE/FPM

PRS10-12PRS13-15

Main application:Hydraulics in heavy industry, pressesAdvantages:Suitable for old worn piston rods, divided version for simple assembly is availableStandard materials:PUR / POM


16 „RS/PRS“ Profiles

17„RS/PRS“ Profiles

Ød ØD L c/s

5–24,9 Ød+8 6,3 4

25–49,9 Ød+10 8 5

50–149,9 Ød+15 10 7,5

150–299,9 Ød+20 14 10

300–499,9 Ød+25 17 12,5

500–699,9 Ød+30 25 15

700–1 000 Ød+40 32 20

> 1000 Ød+40 32 20



Recommendations for locating single--acting piston rod seal types with sleeves (U-casing) compact sealing.

Ø ØD L c/s

5–7,9 Ød+4,9 2,2 2,45

8–18,9 Ød+7,3 3,2 3,65

19–37,9 Ød+10,7 4,2 5,35

38–199,9 Ød+15,1 6,3 7,55

200–255,9 Ød+20,5 8,1 10,25

256–649,9 Ød+24 8,1 12

650–1 000 Ød+27,3 9,5 13,65

> 1 000 Ød+27,3 9,5 13,65


Recommendations for setting single/double acting piston seals, O-ring activated PTFE (PU) sealing.

Ø ØD L c/s

10–39,9 Ød+10 16 5

40–74,9 Ød+15 25 7,5

75–149,9 Ød+20 32 10

150–199,9 Ød+25 40 12,5

200–300 Ød+30 50 15

> 300 Ød+40 63 20


Recommendations for setting double acting compact piston sealing types.


Ø ..................external diameterØd................. internal diameterL .....................added construction lengthH .................... length of the scraping ring

The seal’s location tolerance:Ø D1 H11 L<10 mm +0,2Ø D H11 L>10 mm +0,3


Ra(µm)


≤ 2,5 ≤ 0,1–0,5




Bearing surface type > 50% ≤ 95%

Simple ordering procedure WR01 PUR 50 × 58 × 4/7


WR01 Main application:Standard scraping ringHydraulicsAdvantages:Simple assembly (clicking), excellent resistance to wear and tear, technically accurate closing Standard materials:PUR, rubber

WR11WR02WR12

Main application:In combination with piston PTFE seals activated by O-ring RS09Advantages:Excellent resistance to wear and tear, double acting functionStandard materials:PUR, rubber

WR03 Main application:Standard hydraulic application, pressing for axial open locationAdvantages:Great resistance to wear and tear, plastic thrust ring, no problems with oxidation between the bush ring and locationStandard materials:PUR / POM rubber / POM

Recommendation for Setting the Scraping Rings

18 „WR“ Profiles

19„WR“ Profiles

Ød ØD ØD1 L L1 H*

6–100 Ød+8 Ød+6 4 1 7

100,1–149,9 Ød+12 Ød+9 5,5 1,5 10

≥ 150 Ød+15 Ød+11 6,5 2 13

*) H = Total length of the scraping ring

Recommendation for Setting the Scraping Rings


Recommendations for setting single/double acting scraping ring.


Recommendations for setting single/double acting piston seals. O-ring activated PTFE (PU) seals.


Recommendations for setting double acting piston seal types compact.

Ød ØD ØD1 L L1 H*

6–49,9 Ød+8 Ød+4 5 min. 2 8

50–99,9 Ød+10 Ød+5 6 min. 2 9,7

≥ 100 Ød+15 Ød+7,5 8,5 min. 2 13

*) H = celková délka stíracího kroužku

Ød ØD L H*

6–9,9 Ød+8 5 8

10–99,9 Ød+10 7 10

100–200 Ød+15 9 12

> 200 Ød+20 12 16

*) H = Total length of the scraping ring


ØD ................external diameterØd................. internal diameterL............................added construction length

The seal’s location tolerance:Ø d f8Ø D H8


Ra(µm)


≤ 2,5 ≤ 0,1–0,5




Bearing surface type ≤ 50% ≤ 95%

Simple ordering procedure OS01 NBR/POM 60 × 80 × 10


OS01OS02

Main application:Bearing protectionAdvantages:Good adaptability for various temperatures and agentsStandard materials:rubber / POM rubber / Al

R09 Main application:Rotary pinsAdvantages:For high pressuresStandard materials:PTFE + NBR or Viton

RS19aPS19a

Main application:The bearings protection in chemical and pharmaceutical industry Advantages:Low friction. good chemical and heat resistance, suitable for high speedsStandard materials:Stainless steel PTFE spring

Recommendation for Setting the Rotation Sealing

20 „OS/R/RS/PS“ Profiles

21 „OS/R/RS/PS“ Profiles

Recommendation for Setting the Rotation Sealing


Recommendation for setting single acting rotary sealing oil seals / radial shaft seals


Recommendations for setting single/double acting piston seals, O-ring activated PTFE (PU) seals.


Recommendation for setting single acting rotary seals PTFE seals activa-ted by spring

Ød ØD ØD1 L L1

5–19,9 Ød+9 Ød+5 3,6 0,85

20–39,9 Ød+12,5 Ød+7 4,8 1,35

40–399,9 Ød+17,5 Ød+10,5 7,1 1,8

≥ 400 Ød+22 Ød+14 9,5 2,8

Ød ØD L c/s

6–18,9 Ød+4,9 2,2 2,45

19–37,9 Ød+7,5 3,2 3,75

38–199,9 Ød+11 4,2 5,5

200–255,9 Ød+15,5 6,3 7,75

256–649,9 Ød+21 8,1 10,5

> 650 Ød+28 9,5 14

Ød ØD L c/s

6–59,9 Ød+12 7 6

60–139,9 Ød+15 8 7,5

140–299,9 Ød+20 10 10

300–499,9 Ød+30 12 15

500–800 Ød+40 20 20

> 800 Ød+50 22 25

Recommendation for Setting the O-rings

22 „OR“ Profiles

Pressure direction Pressure direction Pressure direction

Recommendation for setting 0-rings for static use

O-ring cross section (mm)

Groove(mm)

Without support ring(mm)

One support ring(mm)

Two support rings (mm)

Recommended widthsupport upporint (mm)

Ød t ± 0,05 b + 0,25 b1 + 0,25 b2 + 0,25

1,5 1,10 2,1 3,1 4,1 1,0

1,78 1,35 2,5 3,5 4,5 1,0

2,0 1,56 2,7 4,2 5,7 1,5

2,50 2,05 3,3 4,8 6,3 1,5

2,62 2,18 3,5 5,0 6,5 1,5

3,00 2,52 3,9 5,4 6,9 1,5

3,50 3,00 4,4 5,9 7,4 1,5

3,53 3,00 4,4 5,9 7,4 1,5

4,00 3,40 5,0 6,7 8,4 1,7

5,00 4,25 6,3 8,0 9,7 1,7

5,33 4,53 6,7 8,4 10,1 1,7

5,70 4,85 7,1 9,1 11,1 2,0

6,00 5,10 7,5 9,5 11,5 2,0

6,99 5,94 8,8 10,8 12,8 2,0

7,00 5,95 8,8 10,8 12,8 2,0

8,00 6,80 10,0 12,5 15,0 2,5

10,00 8,50 12,5 15,0 17,5 2,5

23 „BWR“ Profiles

Recommendation for Setting the Guiding Rings


Recommendations for setting the piston rod guiding ring


Recommendations for setting the piston guiding ring

ØD Ød L c/s

6–29,9 ØD+3 4 1,5

30–49,9 ØD+3 5,6 1,5

50–99,9 ØD+5 9,7 2,5

100–799,9 ØD+5 15 2,5

800–1 000 ØD+8 25 4

> 1 000 ØD+8 25 4

Ød ØD L c/s

6–29,9 Ød+3 4 1,5

30–49,9 Ød+3 5,6 1,5

50–99,9 Ød+5 9,7 2,5

100–799,9 Ød+5 15 2,5

800–1 000 Ød+8 25 4

> 1 000 Ød+8 25 4

Details and recommendations for setting the guiding rings in dynamic applications. Our standard guiding rings are available in a 45° divided version. It is also possible to order that as spirals, 90° divided versions or as goods in stock.

Chemical Resistance

24 Semi-Finished Product

PU-U203

NBR-N107

N-NBR--HN112

EPDM--E131

AFLAS-AF101

FPM-F109

Silicone-S102

POM-P101

PA-A112

PTFE-PT101+ combined

Air up to 100°C O O O O O O O O O O

Air up to 200°C N N N N N O O N N O

Eco oil O V V N - O N O O O

Braking liquid N N N O O N N N N O

Diesel O O O N O O N O O O

Fuels V V V N - O N O O O

Mineral oils O O O N O O V O O O

Ozone. oxygen O N O O O O O N N O

Steam to 150°C N N N O O N N N N O

Vegetable oils O O O N O O O O O O

Water up to 40°C O O O O O O O O V O

Water up to 90°C O V O O O V O O V O

O = resistant, V = suitable, N = unsuitable

Plastic materials

The product range of semi-finished products is made complete with hard plastic materials and fluoride thermoplastic materials used for the support rings or guiding rings, and also for special and pre-stressed seals. We maintain perfect commercial relations with our suppliers, a wide product range in combination with efficient management of the warehouse administration, which guarantees fast availability. The dimension range of the semi-finished products is suitably adapted to the machining requirements. We also offer a wide selection of various material mixtures covering all requirements for using seals. The table above provides a review of the most common pressurized liquids and sealing

materials, and their use. Do not forget that the applicability of various materials in hydraulic liquids can affect some operating conditions, e.g. temperature. If you need other, more detailed information, contact us or use the table listing resistance to individual agents. In case of any doubts, it is possible to perform operational testing, which is provided upon the request of our clients.

P0M | PA | PTFE | various combinations

25Semi-Finished Product

Semi-products

We deliver high quality semi-finished products in the form of bars or pipes for the production of sealing elements. Due to the latest technologies and close cooperation with the manufacturer, we can cover the full range of a seal’s applications. Each individual semi-finished product is carefully checked prior to dispatch. It means that the most important part of our services provided for the customer, is our contribution to their competitiveness, because we

provide high quality for adequate prices. In addition to the wide range of standard dimensions we have in store, we offer special dimensions with short delivery periods, in all materials and FDA quality.

PU l NBR l EPDM l FPM l *AFLAS® l SILIKON l POM l PA l PTFE l and many more

Polyurethane materialsPolyurethane materials have acquired significant recognition among modern sealing technologies. They represent a dominate share on the market of piston rod and piston seals. Our delivered semi-finished polyurethane products are exceptional for their highest quality. In many applications, our produced polyurethane seals exceed the competitor’s, regarding their parameters. The reason is a very careful material selection by the manufacturer and its production technologies. Unlike the products processed from thermoplastic materials, our delivered polyurethane semi-finished products include maximum freedom as regards the formation of perfect physical properties during polymerization. Any unsuitable effects during the polymerization process, by the heating

and deforming of plastic materials, is eliminated due to the materials applied. In addition to standard materials, materials are also produced with the optimized friction coefficient and materials designed for direct contact with food. Another important fact is that we deliver semi-finished polyurethane products up to the hardness of 94 Shore A with a clamping ring. It simplifies clamping into the lathe, being independent of the production material applied.

ElastomersElastomers are frequently indicated as rubber materials, which form an important part of the material range. Elestomere products were superseded in many standard applications by modern polyurethane, however they still remain an important element of sealing technology. They have their importance due to the wide spectrum of their heat and chemical resistance. Our supplier operates solely with rubber mixtures from recognized manufacturers. In combination with modern processing technology, they provide the guarantee of quality and dimensions of economical semi-finished products. The

resulting value for our customers includes the perfect ratio of price and quality, and fast availability in standard and special dimensions and materials. All elastomer semi-finished products are delivered with hard surface (package) so it enables simple machining on CNC, despite low core hardness and high flexibility.

NBR l EPDM l FPM l FPM l *AFLAS® l SILIKON

*) AFLAS® - is a registered trade mark of Asahi Glass Company.

Physical Properties


Sealing material Semiproducts

DIN/ASTM I standards

Units PU U203 PU U203-MoS2

PU U203-D57

NBR N107 H-NBRHN112

Colour red gray blue black black

Density DIN 53479 g/cm3 1,1 1,15 1,13 1,32 1,23

Hardness DIN 53505 Shore A 95 ± -2 95 ± -2 95 ± -2 85 85

Hardness DIN 53505 Shore D

Humidity absorption 20° / 65° rel.

100% module DIN 53504 N/mm2 > 12 > 11 > 18 10,2

Resistance to overloading DIN 53504 /ASTM D4894

N/mm2 38 > 35 > 35 > 30 > 17

Dilatability DIN 53504 /53455

% 520 560 330 > 155 > 200

Friction coefficient ASTM D

Compression set 22h/70° DIN 53517 % 31 26 32 7

Compression set 22h/100° DIN 53485 9 20

Compression set 22h/150° DIN 53517 A 22

Compression set 22h/175° DIN 53517 A

Compression set 22h/175° DIN 53517

Compression set 72h/RT DIN 53517

Minimum operating temperature °C -30 -30 -30 -25 -25

Maximum operating temperature °C 105 105 90 100 150

FDA suitable materials

PU U203-B95 light blue

PU U203-FDA95 beige

NBR N111-W85 white

EPDM E132-W85 white

FPM F110-BR85 brown

Silikon S102-R85 red

Silikon S103-BL85 blue

POM P101-WE white

Polyamid PA6-A112-WC white

PTFE T101-W white

This table is solely an extract of our most important sealing materials and their typical properties. The data represent typical test results. We do not recommend exceeding the limit values in more than any one feature.

The total review of all materials is available on pages 28–29.

Detailed information is available in the technical sheets of the materials. If you are not sure, we recommend contacting our application technicians or performing the testing operation.

Note

EPDME131

AFLASAF101

FPM F109 FPM F111 SilikonS102

POM P101 PA A112 PTFE-PT101

PTFE-FT105

PTFE-BR40 T110

black black brown black red white beige white grey brown

1,23 1,68 2,51 1,878 1,54 1,41 1,15 2,16 2,25 3,09

85 85 85 85 85

56 60 63

0,2 2,2

4,2 7,4

> 14 > 7,2 > 13 > 11,5 > 7 70 85 > 25 > 15 > 23

> 137 > 236 > 200 > 180 > 120 40 25 > 300 > 220 > 200

< 0,4 < 0,4 0,06 0,08 0,13

16

13

7,7

32,8 18,5

-50 -15 -20 -25 -55 -60 -30 -200 -200 -200

130 210 210 210 210 100 105 260 260 260


Physical Properties (table continuation)

Material table


Description Temperature Solid at 20°C Main application

PUU203–R95

red -30 to +105°C Shore A 95 ± 2 -sleeves, scraping rings, and other sealing elements. Mineral oils, compressed air, water Resistant to hydrolysis

PUU203–G95

green -30 to +105°C Shore A 95 ± 2 U-sleeves, scraping rings, and other sealing elements. Mineral oils, compressed air, water Resistant to hydrolysis

PU FDAU203–B95

Light blue -30 to +105°C Shore A 95 ± 2 U-sleeves, scraping rings, and other technical elements. Mineral oils, compressed air, water Resistant to hydrolysis

PU FDAU203–95FDA

Beige -30 to +100°C Shore A 95 ± 2 U-sleeves, scraping rings, and other sealing elements. Contact with food. Resistant to hydrolysis

PU MoS2

U203–GM95grey -30 to +105°C Shore A 95 ± 2 U-sleeves, scraping rings, and other sealing elements

Mineral oil, compressed air, water For use in adverse operating conditions, resistant tohydrolysis

PU 57 Shore DU203–D57

Dark blue -30 to +90°C Shore D 57 ± 2 The support rings or the composite seals with a pre-stressed element Mineral oil, compressed air, water Resistant to hydrolysis

PU 57 Shore DMoS

2

U203–D57G

grey -30 to +90°C Shore D 57 ± 2 The support rings or the composite seals with a pre-stressed element Mineral oil, compressed air, water. Resistant to hydrolysis

NBRN107–B85

black -25 to +100°C Shore A 85 ± 5 U-sleeves, scraping rings, and other technical elements. Mineral oils, compressed air, water

NBR 9510N109–B95


NBR FDAN111–W85

white -22 to +100°C Shore A 85 ± 3 U-sleeves, scraping rings, and other technical elements. Mineral oils, compressed air, water

H–NBRblackHN112–B85


FPMF109–BR85

brown -20 to +210°C Shore A 85 ± 5 U-sleeves, scraping rings, and other technical elements. High temperatures and aggressive agents

FPM FDAF110–BR85

brown -20 to +210°C Shore A 85 ± 5 U-sleeves, scraping rings, and other technical elements. High temperatures and aggressive agents

FPMblackF111–B85

black -25 to +210°C Shore A 85 ± 5 U-sleeves, scraping rings, and other technical elements. High temperatures and aggressive agents

EPDME131–B85

black -50 to +130°C Shore A 85 ± 5 U-sleeves, scraping rings, and other technical elements. Hot wa-ter and steam, diluted acidic alkali solutions EPDM NOT resistant to mineral oils

EPDM FDAE132–W85

white -50 to +100°C Shore A 85 ± 3 U-sleeves, scraping rings, and other technical elements. Hot wa-ter and steam, diluted acidic alkali solutions EPDM NOT resistant to mineral oils


Description Temperature Solid at 20°C Main application

Silikon FDAS102–R85

red -55 to +210°C Shore A 85 ± 5 Flange seals, flat seals, and other static seals Not recommended for dynamic applications

Silikon FDAS103–BL85

blue -55 to +180°C Shore A 85 ± 3 Flange seals, flat seals, and other static seals Not recommended for dynamic applications

AFLASAF101–B85

black -15 to +210°C Shore A 85 ± 5 U-sleeves, scraping rings, and other sealing elements Acidic oil and gas, amines, steam/hot water, braking liquidsHigh electrical insulation ability

POM FDAP101–WE

white -60 to +100°C – Support and guiding rings, machined parts

PA FDAA112–WC

beige -30 to +105°C – Support and guiding rings, machined parts

PTFE–FT105–G

grey -200 to +260°C Shore D 55–64 Composite seals with elastomer, pre-stressed elements Spring pre-stressed seals, support rings, and guiding elements. Reinfor-ced fibre glass

PTFE–P FDAT101–W

white -200 to +260°C Shore D 51–60 Composite seals with elastomer pre-stressed elements, Spring pre-stressed sealsSupport and guiding rings, low friction For the food industry, excellent chemical resistance

PTFE–40%T110–BR40

bronze, brown

-200 to +260°C Shore D 62–67 Composite seals with elastomer pre-stressed elements Spring pre-stressed seals, support and guiding rings, low friction


Bronze, blue -200 to +260°C Shore D 62–67 Composite seals with elastomer pre-stressed elements Spring pre-stressed seals, support and guiding rings, low friction


Bronze, brown

-200 to +260°C Shore D 65–70 Composite seals with elastomer pre-stressed elements Spring pre-stressed seals, support and guiding rings, low friction

PTFE–25%T125–C25

coal grey -200 to +260°C Shore D 62–67 Composite seals with elastomer pre-stressed elements Spring pre-stressed seals, support and guiding rings, low friction

We also deliver parts made from various mixtures of PTFE, PEEK, various polyamides and polyimides, PETP and other materials. For other information, see the material sheets available upon request.

The specified minimum operating temperatures are for information purposes, because the seals function at low temperatures depends on the seal’s type, on general operating conditions, and on the type of surrounding metal parts the seal is in contact with. The specified upper operating temperature limits can be exceeded, but the operating service life is reduced.

In case of any doubts contact our technicians.

Note

Temperature range


The above specified graph provides a rough review of application temperatures of the most important sealing materials. If the material is in contact with chemically aggressive liquids, the temperature limits must drop significantly.

Note

31Questionnaire

The Questionaire for Demand and Order

SITTECH HYDRAULIKA, s. r. o.

Františka Kmocha 1824434 01 MOST

tel.: 476 700 438fax: 476 100 834

[email protected]

sittech-hydraulika.cz

Piston sealing / Piston rod sealing / Multipurpose sealing scraping rings /Support rings / Guiding rings / Static sealing / Mining sealing /

Rotation sealing / Special products

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