09. Simrit - Broșura Merkel PTFE gaskets

8/12/2019 09. Simrit - Broura Merkel PTFE gaskets

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Vibration Control

Special Sealing Products: Bellows, Diaphragms,Elastomer Composite Parts and Precision Mouldings

Lederer Liquid Silicone Products

ISC O-Ring

Integral Accumulator

Merkel Hydraulics / Pneumatics

Simmerring

Simrit offers a complete package of

products and services, including leading

brands such as Simmerring, Merkel,

Integral Accumulator, Lederer and

ISC O-Ring.

Simrit, Your Global Technology Specialistfor Seals and Vibration Control

This way we secure competitive

advantages for you based on

experience all around the world:

Simrit has a presence through-

out Europe, America and Asia,

either directly or through its

affiliated companies NOK

(Japan) or Freudenberg-NOK

(USA). The transfer of know-

ledge between these markets isincorporated directly into the

Simrit service package.

With our many Simrit Service

Centres and Simrit distribution

Partners, we serve and supply

more than 100,000 customers

worldwide. Our Simrit Partners

ensure rapid availability from

stock. This means spare parts

quickly arrive when and where

they are needed. There is aSimrit Partner near you as well.

Simrit, Your GlobalTechnology Specialistfor Seals and VibrationControl offers you acomplete service pack-age. A unique rangeof products and servicesguarantees you nume-rous advantages over

the competition.

Simrit acts as a partner to

general industry. Its position as

a market leader is achieved

through continuous research,

development and manufacture.

We have the worlds widest ran-

ge of seals and vibration con-

trol products, and can offer you

solutions based on the demands

of state-of-the-art-technology,solutions which set standards.

Make the most of Simrits service

package and give yourself a

real competitive edge:

Constant innovations

Uniquely wide range of

products

Strong product brands

Unique materials expertise

A wide range of value

added services

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Test conditions: Temperature RTtime: 0,5 under loading 0,5 unloading

Flexoform P under loading

Flexoform S under loading

Flexoform P unloading

Flexoform S unloading

Pressure

The Flex-O-Form gasket programme from Simritcovers a whole range of applications.

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Flex-O-Form SFlex-O-Form S, a modified light-

coloured PTFE material with a

low level of mineral filler, is

used for flange and pipe con-

nections in applications that are

critical in chemical and thermal

terms. Even with hard flange

materials Flex-O-Form S will

adjust to an uneven surface.The material is not easily dam-

aged during installation. The

permissible surface pressure

on installation is 80 N/mm2.

Due to the homogeneity of the

material the sealing effect

already starts at 12 N/mm2:

a particular advantage in the

case of soft flange materials

with relatively rough sealing

surfaces.

Flex-O-Form PFlex-O-Form P, a modified dark-

grey PTFE material with a low

level of special graphite filler,

is used for flange and pipe con-

nections as well as housings

and as frame seals in applica-

tions that are critical in chemi-

Sealing of detachableconnections to pipes,containers, units etc. isachieved using staticseals. The function of theseal is to compensate forunevenness in the seal-ing surfaces and slightmovement such as heat

expansion and vibrationin the overall system.The most common typeof static seal for suchdisconnection points aregaskets. With the gasketmaterials Flex-O-Form Sand P two types of mate-rial with specific proper-ties are available, in par-ticular for the chemicalsindustry.

cal and thermal terms. Due to

a high level of compressibility

Flex-O-Form P offers excellent

adaptability to uneven and

rough sealing surfaces, result-

ing in uniform pressure distribu-

tion over the circumference.

Flex-O-Form P is porous when

delivered; there is no adverse

effect from minor damage tothe surface of the seal. It should

be remembered that with this

flange material the minimum

surface pressure of 20 N/mm2

should also be observed in

order to achieve the required

sealing effect.

Deformation andrecovery capability ofFlex-O-Form S and P

Flex-O-Form P offers excellentadaptability. Even after severe

deformation of the seal it still

has a good recovery capability

(difference between solid and

broken line). Both Flex-O-Form

P and Flex-O-Form S are suit-

able for cutting using a water

torch process.

Deformation

and recovery capabilityFlex-O-Form P and S


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Benefits optimum sealing values, des-

pite changes in temperature

good adaptation even to

very rough sealing surfaces

high chemical resistance

(low filler level)

high thermal resistance

good recovery capability

anti adhesive good sealing effect with

surface pressure of only

12 N/mm2 due to homo-

geneity of material

Examples of use flanges, pipework connec-

tions and boilers in the

chemicals industry, food pro-

cessing, plant engineering

and equipment manufacture

dome cover sealing

inspection glass fittings

Characteristic values of seal as per DIN 28091, Part 3

Flex-O-Form SSeal DIN 28091-TF-Z-O

Characteristic values Value

Density 2.2 g/cm3

Cold-upsetting value KSW 12.6 %Cold-re-deformation value KRW 3.8 %Warm settling value WSW 46.2 %Warm re-deformation value WRW 8.4 %re-deformation value R 0.159 mmSpec. rate of leakage


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Flex-O-Form PSeal DIN 28091-TF-C-O

Benefits excellent adaptation to

uneven surfaces and flanges

high compressibility and

compression strength

good recovery capability

optimum sealing values,

including with changes in

temperature

high chemical resistance(low filler level)

high thermal resistance

antiadhesive

electrically conductive

Examples of use flanges, pipework connec-

tions; boilers and large heat

exchangers (>2m) in the

chemicals industry, plant

engineering and equipment

manufacture

glass seals for lamps in

industrial furnaces

valves on tanks andtank wagons

Characteristic values of seal as per DIN 28091, Part 3

Characteristic values Value

Density 1.2 g/cm3

Cold-upsetting value KSW 57.0 %Cold-re-deformation value KRW 4.1 %Warm settling value WSW 15.2 %Warm re-deformation value WRW 3.0 %re-deformation value R 0.064 mmSpec. rate of leakage


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Fitting instructionsA minimum roughness of

Rz 50m should be observed.

When using the gasket

material Flex-O-Form P

a roughness of Rz 150m

should not be exceeded.

Tighten screws crosswise

with torque spanner in min.

two tightening operationsat 50% and 100% of the

permissible starting torque

for the screws.

Comply with minimum surface

pressure.

Do not exceed maximum

surface pressure.

Take note of dependence on

temperature.

Special applicationsfor Flex-O-Form

FOF S as moulding material

Segmental shape (FOF P)

Moulded FOF P-Rings

(ex. hose couplings)

Approvals forFlex-O-Form

Flex-O-Form P has beenapproved by BAM (German

materials testing institute)

for use with gaseous oxygen

with pressures to 4 MPa and

temperatures to 225C.

KTW

In general aim for the maximum

permissible surface pressure on

installation. Check the surface

pressure after 1012 hours.

(setting characteristics of seal).

When using Flex-O-Form P the

following procedure is also

applicable: If it is only possible

to use surface pressures falling

short of the maximum permis-sible levels, e.g. with flange

materials liable to break,

retightening will be necessary

several times within 24 hours.


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Permanently resistant universal sealing tape Flex-O-Dit

Flex-O-Dit is a permanently re-

sistant gasket tape that comes

in roll form. It is 100% PTFE

and is manufactured in a spe-

cial process by reforming the

fibre structure.

Examples of use flanges

lids housing connections

pipework

special valves/fittings

Benefits high chemical and thermal

resistance

good plastic ductility

high adaptability to surface

structures

high stability under compres-

sive load no cold flow

self-adhesive and easy to

handle

economical storage

Fitting instructionsThe sealing surfaces must be

clean, free of grease and dry.

The width of the sealing tape

depends on the nominal width

of the flange / design. To fit re-

move the protective foil of the

adhesive strip. Attach the seal-

ing tape within the circle of

holes and press down lightly.Arrange the ends crossed over

in front of a bolt; do not butt up

together. Only fit one ring.

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0

-200 -100 -50 0 50 100 150 200 250

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1

3

4

5

6

89

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Temperature C

Query recommended

PressureMPa

Operating limits

*Depending on temperature and installation conditions

Media Pressure Temperature pH value

All media with the exceptionof melted alkali metals 20 MPa* -240+260C 0 14and elementary fluorine

Article list

Tape Tape Tape Recommendation for Article No.width thickness length/reel flange size to

approx.

3 mm 1.5 mm 30 m 50 242037595 mm 2.0 mm 20 m 200 242171087 mm 2.5 mm 15 m 500 24217109

10 mm 3.0 mm 8 m 1000 2421711014 mm 5.0 mm 5 m 1500 24217111

17 mm 6.0 mm 5 m > 1500 2421711220 mm 7.0 mm 5 m > 1500 24211402

The width of the sealing tape depends on the nominal width of the flange. With

major unevenness in the sealing surface the next largest tape width should be used.


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From a standard design to an individual solution

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Solution offered bysegmental designThanks to its high level of com-

pressibility the gasket material

Flex-O-Form P provides for the

form-fit joining of segments into

one seal. Ease of operation and

thus simple fitting is achieved

by wrapping the joins with a

very thin PTFE sealing tape. Thegasket can then be considered

as a single part.

The material properties provide

for maintenance-free usage

after insulation of the tubular

heat exchanger.

Benefits from develop-ment of seals in line withrequirements excellent sealing values of

specially developed gasketmaterials

easier usage in comparison

with cut goods from PTFE

sealing cord

high functional reliability

improved handling on

installation

Whether tried and tested stan-

dard versions or an individual

sealing design optimised ac-cording to the application, with

PTFE you can be sure of finding

a solution that caters for your

needs.

The gasket materials described

above form the basis for a wide

range of punched and turned

seals. Thanks to the range of

dimensions offered by Flex-O-

Form S and P sheeting and foils

single-part gaskets with large

diameters are possible. In

addition, there are dimensional

ranges which call for a cus-tomised solution.

Examples ofrequirements sealing for heads of tubular

heat exchangers

heat exchanger subject to

permanent slight vibration

increased service life in

comparison with conventional

gasket

dimensional range of2000 mm exceeding measu-

rements of standard versions


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Vibration ControlSpecial Sealing Products: Bellows, Diaphragms,Elastomer Composite Parts and Precision Mouldings

Lederer Liquid Silicone Products

ISC O-Ring

Integral Accumulator

Merkel Hydraulics / Pneumatics

Simmerring

High resistance

Good plastic moldability

Self-adhesive

e.g.

Your Benefits

Simrit Services Your Benefits

Merkel PTFE gaskets for high level applications

Unique materials expertise

Specialised technological expertise

All from one source

Technological edgeConstant innovations

Uniquely wide range of products

Strong product brands

Longer unit service life

Competitive advantages, efficiency and lower costsA wide range of value added services

20GB3371.0

0405D&S.

ABT

Simrit, Your Global Technology Specialistfor Seals and Vibration Control

Product informationMerkel PTFE gaskets

Headquarters Europe:Freudenberg Simrit KG

D-69465 Weinheim, Germany

Phone +49 (0) 1805 -S im r i t

Phone +49 (0) 1805- 746748Fax +49 (0) 18 03 - 74 67 48e-mail: [email protected]

09. Simrit - Broșura Merkel PTFE gaskets

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