TBM 29 - and - Merkel Freudenberg

Paper Line 

Pulp Line 

RK 15 

About us 

Seals and Sealing Systems 

for the Pulp & Paper Industry 

TBM 29 

PG 1 

RHS 51

Merkel Freudenberg g Fluidtechnic 

Sealing specialist from Hamburg 

�� FFounded d d 1849 iin WWeinheim, i h i �� Founded 1899 in Hannover 

and still family owned today 

� 400 employees 

� Approx. 32.000 employees / 

441 companies worldwide 

� Turnover 2010: 45,3 M€ 

� Turnover 2010: 4,8 billion€ 

Production 

Sales 

Production and Sales 

Merkel within the Freudenberg Group is a worldwide operating specialist for innovative seals 

and sealing g systems y in the heavy y industry. y 

2

Merkel Freudenberg g Fluidtechnic 

Historic milestones 

3 

1899 Founded by Heinrich Martin Merkel 

1929 

1952 

First seal made of elastomeric material 

First production of PTFE seals in Germany 

1975 Launching of polyurethane seal production 

1988 

First seal with an outer diameter of over 10 m 

1996 Becoming eco g pa part t oof tthe e Freudenberg eude be g Group G oup 

Today, Merkel is the technology leader for the heavy industry

Particular Strengths g 

What makes Merkel different? 

Advisory competence: We are at your side. 

Our staff of dedicated engineers with years of experience are there for you, any time you need it. 

Development competence: We don‘t leave anything to chance. 

Test plus FEA Layout Layout-Programmes 

Programmes 

The “right” right Product 

Merkel Xpress: 24 hours just-in-time service worldwide 

Tailor-made seals, made of OEM materials – if there is a need for speed. 

4

We Ask Our Customers 

Customer satisfaction analysis 2010 – external market research 

On the following points . . . 

5 

� Advisory competence 

� Functionality y of products p 

� Innovation 

� Customer support 

� Response to inquiries 

� Special demands 

�� 

. . . 

Mr. Faßbender, 

Herrenknecht AG 

Mr. Hausler, 

Dieffenbacher GmbH & Co. 

. . . our customers value us to be stronger than our competitors.

Market Allocation into Market Segments g 

Heavy Industry 

Shi Ship PPresses 

Metal 

Pulp & Paper 

Wind 

Tunnel Boring Mining Civil Engineering 

Merkel – as the leading supplier – offers sealing solutions for the most challenging 

heavy industry applications. Market leaders rely on our product quality. 

6

Merkel Seals in Paper p Manufacture 

High-performance seals for the production process as a whole 

7

Main a Products oducts for o the t e Pulp u p Linee 

Rotary shaft seals and packings 

8 

Packings TBM 29 

Enviromatic EA

Merkel Tubomatic - TBM 29 Profile 

Main properties – Your benefit 

Main properties of the Merkel Tubomatic TBM 29 . . . 

� endlessly vulcanized element from mould 

� proven, robust design in various applications 

� allowed shaft misalignment/eccentricity: ± 3 mm 

� compatibility with aggressive media 

. . . and your benefits 

9 

� reliable performance, best leakage behaviour 

� lifetime of seal matches with maintenance cycle 

– no unplanned stops 

� mounting ti on site it (if necessary) ) 

with hot bonding set

Merkel Tubomatic - TBM 29 Profile 

Successful field experiences in the pulp production 

Motivation: 

A washing press on site showed a not acceptable 

leakage rate. The competitor solution revealed 

heavy scoring at the sealing lip and sleeve. 

Merkel Solution: 

10 

Special operating conditions: 

� Aggressive media (Black liquor 

sodium hydroxide) 

pH: 10 to 11 

� Temperature: +80°C to +90°C 

�� Circumferential speeds: 30 30-50 50 rpm 

Profile 

Result: 

�� First seal that performs leakage 

free in this application since 

May 2010

Merkel Enviromatic EA 


Main properties of the Merkel Enviromatic EA 

� FEA calculated seal design: uniform contact pressure 

and small contact area of the seal lip even at large 

axial clearances 

� Strong sealing lip with defined, sharp sealing edge 

�� Hi High h wiping i i and d sealing li effect ff t against i t environmental 

i t l 

conditions 


�� reliable reliable, defined wiping performance 

� outstanding resistance to ageing, fluids and ozone 

� high wear resistance for long lifetime 

�� di diameters t up to t Ø 3000 mm 

� easy replacement – matches housings type A 

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Main Products for the Paper p Line 

Rotary shaft seals and special products 

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Merkel RHS 51 NOK SBR 

Merkel R 35 

Merkel Paperguard Further products

Merkel Radiamatic RHS 51 – High g Performance Radial Shaft Seal 


Main properties of the Merkel Radiamatic RHS 51 . . . 

� highly wear & tear resistant 

� circumferential speeds up to 35 m/s 

� equal lip load in case of high shaft misalignment 

� secure self-retaining fit 

� excellent sealing function on the static side 


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� reliable, leakage-free performance 

� new benchmark in production speed possible 

� low cost for maintenance of counter surfaces 

� easy mounting & dismounting – no damage to the housing 

� can be used more than once

Evenly y Spread p Radial Forces at High g Eccentricities 

Optimised seal design for rotary applications 

Contact Normal Streess 

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2 

1,8 

1,6 

1,4 

1,2 

1 

0,8 

0,6 

04 0,4 

0,2 

-3 mm 

0 

0,25 0,55 0,85 1,15 

Arc Length 

1,45 1,75 

Radial force = 50% 


2 

1,8 

1,6 

1,4 

1,2 

1 

0,8 

0,6 

04 0,4 

0,2 

Nominal Diameter 

The space covered 

by the function line 

is equivalent to the 

radial force 

0 

0,25 0,55 0,85 1,15 1,45 1,75 

Arc Length 

Radial force at nominal position = 100 % 

+ 3 mm 


2 

1,8 

1,6 

1,4 

1,2 

1 

0,8 

0,6 

04 0,4 

0,2 

0 

0,25 0,55 0,85 1,15 1,45 1,75 

Arc Length 

Radial force = 135 %

Merkel Radiamatic Radial Shaft Seals 

Easy mounting 

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� No special mounting tools necessary 

� Excellent sealing function on the static side 

� No damage to the housing

Merkel Radiamatic RHS 51 – High g Performance Radial Shaft Seal 

Field experiences – Paper production 

Motivation: 

Leakage 70l/day in press section and competitor seals 

were burned by friction and heat. 

Merkel Solution: RHS 51 

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� Radial shaft off set 

up to 3 mm 

� Aggressive media 

� Temperature resistance 

up to 1150°C 0°C 

� Circumferential speeds 

up to 35 m/s 

�� WWorn-out t counter t surfaces f 

Result: 

� Leakage-free performance 

since installation

Merkel Radiamatic R 35 – With Rubber Lock 


Main properties of the Merkel Radiamatic R 35 . . . 

� Endlessly vulcanized element from mould 

with stainless spring 

�� Wid Wide range of f diameters di t from f 200 mm up to t 3500 mm 

� Can stand pressures up to 0,05 MPa 

� 3 Standard seal materials: NRB, , HNBR and FKM 


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� reliable, leakage free performance 

� easy mounting on site without disassembling the cylinder 

� full rubber seal – no damage of the housing during replacement

Merkel Bonding g Set RK 15 for Radiamatic R 35 

Secure and lasting bonding of radial shaft seals on site 

Merkel Bonding Set 

Installation steps 

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Features 

� Robust synthetic material device 

for multiple use 

�� MMatched t h d tto product d t and d application li ti 

� Easy handling at any location 

of the shaft

Merkel Radiamatic R 35 – With Rubber Lock 

Field experiences 

Motivation: 


Search for a sealing system able to be mounted on site 

without the necessity to disassemble the main shaft. shaft � High g reliability y 

Replacement of existing seal on site by Merkel sealing 

solution. 

Merkel Solution: 

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Cutting area of the ring: 

Cotton-fabric-free zone, 

suitable for RK 15 Bonding Set 

� Requested lifetime: 20 years 

Result: 

� Perfect performance 

� Flexibility e b ty for o tthe e custo customer e 

to mount high quality 

sealing solutions on site.

Merkel Paperguard p g PG 1– High g Performing g Safeguard g 

Main Properties – Your Benefit 

Main properties of the Merkel Paperguard PG 1 . . . 

�Stable �Stable functional reliability due to additional spring 

at sealing lip and secondary sealing edge 

�Minimum amount of wear and tear 

�High �High resistance to elevated temperatures 


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�No �No loss of lubricant – perfect protection of he 

product and the environment 

�Easy mounting due to split version 

�Stable �Stable long-term long term behaviour 

�Extended service intervals

NOK SBR 


Main properties of the NOK SBR . . . 

� highly wear & tear resistant 

� low friction heat 

� secure self-retaining fit (steel cage) 

� reliable sealing performance 


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� reliable, leakage-free performance 

� huge standard programme 

� long service life

TBM 29 - and - Merkel Freudenberg

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