© 2006 Merkel Freudenberg Fluidtechnic GmbH, © 2006 Freudenberg Simrit GmbH & Co. KG

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Guide

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Merkel Wiper PU 7

Merkel Wiper PU 7

Product advantagesPUR wiper for axially accessible housings

secure seating in housing (interference fit)made of highly wear-resistant polyurethaneno open ring gap to the outside (dirt pocket) between rod and housingeasy to manufacture housingno corrosion between housing and wiper cage.

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Product descriptionSingle-acting dirt wiper made of polyurethane with integrated metal cage.

ApplicationEarth moving equipment, industrial trucks, presses, mining, injection moulding machines, support cylinders, agricultural machinery, cranes, loading platforms, telescopic cylinders.

Material

Material Designation Hardness

Polyurethane 95 AU V149 95 Shore A

Operating conditions

Material 95 AU V149

Temperature range in °C

Hydraulic oils HL, HLP –30 … +110

HFA fluids +5 … +50

HFB fluids +5 … +50

HFC fluids –30 … +40

HFD fluids –

Water +5 … +50

HETG (rapeseed oil) –30 … +60

HEES (synthetic esters) –30 … +80

HEPG (glycol) –30 … +50

Mineral greases –30 … +110

Sliding speed v in m/s 2

Surface quality

Surface roughness

Ra Rmax

Sliding surface * *

Groove base ≤1,6 mm ≤6,3 mm

Groove flanks ≤3 mm ≤15 mm

* The sliding surface must be matched to the sealing element being used

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Metal cage

Wiper lip

© 2006 Merkel Freudenberg Fluidtechnic GmbH, © 2006 Freudenberg Simrit GmbH & Co. KG

Rod S

eals

Pisto

n Sea

lsW

ipers

Guide

sRo

tary

Seals

Roto

r Sea

lsSy

mm

etric

Seals

Stat

ic Se

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ting T

ools

Merkel Wiper PU 7

Design notesPlease observe our general design notes in → Simrit Standard Catalogue, Merkel Hydraulics – Technical Principles.

Tolerance recommendation

Nominal Ø d D

10 … 150 H8

The tolerance for the Ø d is defined by the buffer seal.

Lead-in chamfersLength and angle are to be designed to suit the rod seal used.

Fitting & installationCareful fitting is a prerequisite for correct function of the wiper. The wiper can be easily pressed into an axially open housing. → Simrit Standard Catalogue, Merkel Hydraulics – Technical Principles.

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© 2006 Merkel Freudenberg Fluidtechnic GmbH, © 2006 Freudenberg Simrit GmbH & Co. KG

Rod S

eals

Pisto

n Sea

lsW

ipers

Guide

sRo

tary

Seals

Roto

r Sea

lsSy

mm

etric

Seals

Stat

ic Se

alsFit

ting T

ools

Merkel Wiper PU 7

L+0, 2

H

C

20°

R <= 0,51

D d∅ ∅

Rounded and free of burrs

d D Profile L H C Article No.

10 20 5,0 5,0 8 1,0 24245001

12 20 4,0 4,0 6 0,8 24234908

12 22 5,0 5,0 8 1,0 24245152

14 20 3,0 4,0 5 0,8 24245101

14 24 5,0 7,0 10 1,2 24245151

15 25 5,0 5,0 8 1,0 24245103

16 22 3,0 3,5 5 0,8 24245003

18 28 5,0 7,0 10 1,2 24245150

20 28 4,0 3,5 5 0,8 24245102

20 30 5,0 7,0 10 1,2 24245002

22 32 5,0 7,0 10 1,2 24244937

22 32 5,0 5,5 7 1,0 24244936

25 32 3,5 5,0 7 1,0 24237353

25 35 5,0 7,0 10 1,2 24182670

28 38 5,0 7,0 10 1,2 24182671

28 40 6,0 7,0 10 1,2 24187185

30 40 5,0 5,0 8 1,0 24244938

30 40 5,0 7,0 10 1,2 24182672

32 42 5,0 7,0 10 1,2 24244939

35 45 5,0 7,0 10 1,2 24182674

36 46 5,0 7,0 10 1,2 24182675

40 50 5,0 7,0 10 1,2 24182676

42 52 5,0 7,0 10 1,2 24182677

45 55 5,0 7,0 10 1,2 24182678

50 60 5,0 7,0 10 1,2 24182679

55 65 5,0 7,0 10 1,2 24182680

56 66 5,0 7,0 10 1,2 24182681

60 70 5,0 7,0 10 1,2 24182682

63 75 6,0 7,0 10 1,2 24182683

65 75 5,0 7,0 10 1,2 24182684

70 80 5,0 7,0 10 1,2 24182685

75 85 5,0 7,0 10 1,2 24182686

Article list

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© 2006 Merkel Freudenberg Fluidtechnic GmbH, © 2006 Freudenberg Simrit GmbH & Co. KG

Rod S

eals

Pisto

n Sea

lsW

ipers

Guide

sRo

tary

Seals

Roto

r Sea

lsSy

mm

etric

Seals

Stat

ic Se

alsFit

ting T

ools

Merkel Wiper PU 7

L+0, 2

H

C

20°

R <= 0,51

D d∅ ∅

Rounded and free of burrs

d D Profile L H C Article No.

80 90 5,0 7,0 10 1,2 24182687

85 95 5,0 7,0 10 1,2 24182688

90 100 5,0 7,0 10 1,2 24182689

95 105 5,0 7,0 10 1,2 24182690

100 110 5,0 7,0 10 1,2 24182691

105 115 5,0 7,0 10 1,2 24182692

110 120 5,0 7,0 10 1,2 24182693

115 125 5,0 7,0 10 1,2 24182694

120 130 5,0 7,0 10 1,2 24182695

125 140 7,5 9,0 12 1,5 24182696

140 155 7,5 9,0 12 1,5 24182697

145 160 7,5 9,0 12 1,5 24182698

150 165 7,5 9,0 12 1,5 24182699

Ordering example

Article No. Type d D H Material

24182699 PU 7 150 165 12 Polyurethane

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