KLINGERmaxiflex 

mounting instructions

The principle

The KLINGERmaxiflex function is

based on the metal winding/ filler relationship and the flange surfaces.

The surface roughness should be

approx. Ra 3.2 μm. KLINGERmaxiflex

gaskets can be used in flanges with

larger surface roughnesses, but in this

case the bolt loads should be increased so as to ensure proper function of

the gasket. 

When the KLINGERmaxiflex gasket is compressed during mounting,

the homogeneous filler „flows“ into

the irregularities of the flange. The

metal windings enclose the filler and,

at the same time, ensure the strength

and elasticity of the gasket.

If the gasket is equipped with an

PTFE filler it must have an inner ring

since the PTFE permits no further

compression, as is the case with other

fillers. On the one hand, it prevents

the gasket from springing open and

on the other, penetration of the flowing PTFE in the pipeline. The larger

the surface roughnesses in the flange

surface, the larger the surface load

required to permit a flow of the PTFE

in the irregularities.

Mounting

The bolts should be free of damage

and lubricated with high-temperature

resistant greases before mounting.

Insert the gasket and fasten bolts

finger-tight.

Next, tighten the bolts crosswise

(see sketch) in at least 3 to 4 passes.

The more passes you perform, the

more uniform the force which is introduced into the flange-gasket system.

In the last pass, the bolts must be

tightened only clockwise. 

1

2

4 3

7 5

6 8

All information is provided in

accordance with the current state of

knowledge. As we cannot influence the

specific application conditions, we

would ask you to consider this as a

non-binding recommendation. 

We can assume no liability for any

resulting damage.

We reserve the right to technical

modifications.

Mounting

Flange surface condition:

1. metallically clean

2. plane-parallel

3. dry

4. fat free

Do not use separating agents 

or sealing aids!
Wide choice of materials for metal 

strip and filler. 

Suitable for high pressures and 

temperatures.

Recommended for flanges with 

tongue and groove.

Type R

Solid metal outer ring used as a 

centerring device and compression

stop.

Used on raised face and flat face 

flanges.

Type CR

Solid metal inner ring.

Use with high pressures and 

temperatures.

Male to female flanges.

Type RIR

This gives the gasket recovery

forces which provide for a reliable

surface load even at fluctuating operating conditions.

In the present 8 versions, the

basic element is added by inner

and/or outer rings as needed. 

Standard Metal strip materials Gasket thicknesses

Nominal

thickness

3.2 mm

4.5 mm

7.2 mm

Compressed Guide ring

thickness thickness

2.3 - 2.5 mm 2 - 2.2 mm

3.2 - 3.4 mm 3 - 3.3 mm

5.0 - 5.5 mm 5 - 5.5 mm

The design principle of the

KLINGER Spiral-Wound 

Gaskets

The basic element of every gasket is

the wound core. The V-shaped metal

strip is spirally wound with the softmaterial filler.

To improve the mechanical

strength and other sealing characteristics, some layers at the beginning

and at the end are wound without soft

material and spot-welded over the

total circumference.

The constant tensile force during

the complete winding process permits

a defined, constant thickness of the

structure.

1.4301

1.4401

1.4404

1.4541

1.4571

Special version:

Monel 400 ®, InConel 600 ®, InConel 625 ®, InConel X750 ®,

Nickel 200 ®, Titanium, Incoloy 800 ®

, Incoloy 825 ®

Other materials on request

304

316

316 L

321

316 Ti

KLINGER

Spiral-Wound Gaskets
Wide choice of materials for metal 

strip and filler. 

Suitable for high pressures and 

temperatures.

Recommended for flanges with 

tongue and groove.

Type R

Solid metal outer ring used as a 

centerring device and compression

stop.

Used on raised face and flat face 

flanges.

Type CR

Solid metal inner ring.

Use with high pressures and 

temperatures.

Male to female flanges.

Type RIR

This gives the gasket recovery

forces which provide for a reliable

surface load even at fluctuating operating conditions.

In the present 8 versions, the

basic element is added by inner

and/or outer rings as needed. 

Standard Metal strip materials Gasket thicknesses

Nom.

gasket thickness

3.2 mm

4.5 mm

7.2 mm

Recommended 

thickness in loaded condition

2.3 – 2.5 mm

3.2 – 3.4 mm

4.8 – 5.0 mm

The design principle of the

KLINGERmaxiflex spiral-wound 

gaskets

The basic element of every gasket is

the wound core. The V-shaped metal

strip is spirally wound with the softmaterial filler.

To improve the mechanical

strength and other sealing characteristics, some layers at the beginning

and at the end are wound without soft

material and spot-welded over the

total circumference.

The constant tensile force during

the complete winding process permits

a defined, constant thickness of the

structure.

1.4301

1.4401

1.4404

1.4541

1.4571

Special version:

Monel 400 ®, InConel 600 ®, InConel 625 ®, InConel X750 ®,

Nickel 200 ®, Titanium, Incoloy 800 ®

, Incoloy 825 ®

Other materials on request

304

316

316 L

321

316 Ti

KLINGERmaxiflex 

spiral-wound gaskets
KLINGER

Spiral-Wound Gaskets

Spiral wound sealing element. 

Wound high density.

Wide choice of materials for metal

strip and filler material.

For use in high-pressure pumps,

high-pressure valves and gas 

applications.

Low emission tested.

Type RHD

KLINGERgraphite facing 0.5 mm.

For use in manhole gaskets.

Suitable for use with low bolt loads

and uneven gasket surfaces.

Double sealing effect.

Type R with

KLINGERgraphite facing

Combined inner and outer rings.

The inner ring could have pass bars

or could carry either a metal clad or

soft gasket with pass bars.

Type HTX for

heat 

exchangers

Recommended 

sealing strip roughness

These gaskets are capable of giving

an excellent seal over a wide range of

flange surface finishes.

Subject to technical alterations. 

Status: April 1999

general 

critical 

vacuum 

Ra micrometer

3.2 – 5.1

3.2

2.0

(Larger flange surface finishes require

higher bolt loads) 

However, as a general guide we

recommend the following:
Mounting Instructions

The principle

The spiral wound function is

based on the metal winding/ filler relationship and the flange surfaces.

The surface roughness should be

approx. Ra 3.2 μm. These gaskets

can be used in flanges with larger

surface roughnesses, but in this

case the bolt loads should be 

increased so as to ensure proper 

function of the gasket. 

When the gasket is

compressed during mounting,

the homogeneous filler „flows“ into

the irregularities of the flange. The

metal windings enclose the filler and,

at the same time, ensure the strength

and elasticity of the gasket.

If the gasket is equipped with a

PTFE filler it must have an inner ring

since the PTFE permits no further

compression, as is the case with other

fillers. On the one hand, it prevents

the gasket from springing open and

on the other, penetration of the flowing PTFE in the pipeline. The larger

the surface roughnesses in the flange

surface, the larger the surface load

required to permit a flow of the PTFE

in the irregularities.

Mounting

The bolts should be free of damage

and lubricated with high-temperature

resistant greases before mounting.

Insert the gasket and fasten bolts

finger-tight.

Next, tighten the bolts crosswise

(see sketch) in at least 3 to 4 passes.

The more passes you perform, the

more uniform the force which is introduced into the flange-gasket system.

In the last pass, the bolts must be

tightened only clockwise. 

1

2

4 3

7 5

6 8

All information is provided in

accordance with the current state of

knowledge. As we cannot influence the

specific application conditions, we

would ask you to consider this as a

non-binding recommendation. 

We can assume no liability for any

resulting damage.

KLINGER reserve the right to 

technical modifications.

Mounting

Flange surface condition:

1. metallically clean

2. plane-parallel

3. dry

4. fat free

Do not use separating agents 

or sealing aids!
d2

d3

d4

d4

d1

d2

d3

CR CRIR

10 –

320

d1

10 –

320

d2

PN10 –

40

d3

PN 64 –

320

10 16 25 40 64

d4

100 160 250

DN

Subject to technical alterations.

Status: April 1999

Certified according to 

DIN EN ISO 9001.

KLINGER SWG

types CR/CRIR

Suitable for flanges in accordance with DIN and BS 4504, measures in mm
d2

d3

d4

d4

d1

d2

d3

CR CRIR

Subject to technical alterations.

Status: October 2000

Certified according to 

DIN EN ISO 9001.

150

300

400

600

900

1,500

2,500

150 300 400 600 900 1,500 2,500 150 300 400 600 900 1,500 2,500

øA of

sealing elem.

øI

of sealing element

øA

of centering ring

d3 d2 d4

Nominal width

Press. st. [lbs] Pressure stage [lbs] Pressure stage [lbs]

KLINGER SWG

types CR/CRIR

Gaskets in accordance with ASME B 16.20, 

flanges according ANSI B 16.5, measures in inch
d2

d3

d4

d4

d1

d2

d3

CR CRIR

KLINGER GmbH

P.O. Box 1370, D-65503 Idstein

Rich.-Klinger-Straße, D-65510 Idstein

Tel +49 (0) 61 26 950-0

Fax +49 (0) 61 26 950 340/341

e-mail: mail@klinger-gmbh.de

http://www.klinger-gmbh.de

Subject to technical alterations.

Status: October 2000

Certified according to 

DIN EN ISO 9001.

150

300

400

600

900

1,500

2,500

150 300 400 600 900 1,500 2,500 150 300 400 600 900 1,500 2,500

øA of

sealing elem.

øI

of sealing element

øA

of centering ring

d3 d2 d4

Nominal width

Press. st. [lbs] Pressure stage [lbs] Pressure stage [lbs]

KLINGERmaxiflex

types CR/CRIR

Gaskets in accordance with ASME B 16.20, 

flanges according ANSI B 16.5, measures in inch
d4

o/A o/I o/A o/A o/I o/A o/A

Centering

ring

Sealing

element

Centering

ring

Sealing

element

Centering

ring

d4 d2 d3 d4 d2 d3

o/I o/I o/A o/A o/A o/I o/A

Inner

ring

Sealing

element

Centering

ring

Sealing

element

d1 d2 d3 d4 d2 d3

KLINGERmaxiflex

types CR/CRIR

Flanges in accordance with BS10, measures in inch

Nominal width

d2

d3

d4

d4

d1

d2

d3

CR CRIR

KLINGER GmbH

P.O. Box 1370, D-65503 Idstein

Rich.-Klinger-Straße, D-65510 Idstein

Tel +49 (0) 61 26 950-0

Fax +49 (0) 61 26 950 340/341

e-mail: mail@klinger-gmbh.de

http://www.klinger-gmbh.de

Subject to technical alterations.

Status: October 2000

Certified according to 

DIN EN ISO 9001.
d2

d3

d4

d4

d1

d2

d3

CR CRIR

øI øI øA øA øI øI øA øA øI øI øA øA øI øI øA øA

Inner

ring

Sealing 

element

Centering

ring

Inner

ring

Sealing 

element

Centering

ring

Inner

ring

Sealing 

element

Centering

ring

Sealing 

element

Centering

ring

Inner

ring

Pressure stage [lbs]

150

Pressure stage [lbs]

300

Pressure stage [lbs]

600

Pressure stage [lbs]

900

d1 d2 d3 d4 d1 d2 d3 d4 d1 d2 d3 d4 d1 d2 d3 d4

KLINGER SWG

types CR/CRIR

Large flanges in accordance with API 605, measures in inch

Nominal width

Subject to technical alterations.

Status: 1995

Certified according to 

DIN EN ISO 9001.
d2

d3

d4

d4

d1

d2

d3

CR CRIR

øI øI øA øA øI øI øA øA øI øI øA øA øI øI øA øA

Inner

ring

Sealing 

element

Centering

ring

Inner

ring

Sealing 

element

Centering

ring

Inner

ring

Sealing 

element

Centering

ring

Sealing 

element

Centering

ring

Inner

ring

Pressure stage [lbs]

150

Pressure stage [lbs]

300

Pressure stage [lbs]

600

Pressure stage [lbs]

900

d1 d2 d3 d4 d1 d2 d3 d4 d1 d2 d3 d4 d1 d2 d3 d4

KLINGERmaxiflex

types CR/CRIR

Large flanges in accordance with API 605, measures in inch

Nominal width

KLINGER GmbH

P.O. Box 1370, D-65503 Idstein

Rich.-Klinger-Straße, D-65510 Idstein

Tel +49 (0) 61 26 950-0

Fax +49 (0) 61 26 950 340/341

e-mail: mail@klinger-gmbh.de

http://www.klinger-gmbh.de

Subject to technical alterations.

Status: 1995

Certified according to 

DIN EN ISO 9001.
d4

o/A o/I o/A o/A o/I o/A o/A

Centering

ring

Sealing

element

Centering

ring

Sealing

element

Centering

ring

d4 d2 d3 d4 d2 d3

o/I o/I o/A o/A o/A o/I o/A

Inner

ring

Sealing

element

Centering

ring

Sealing

element

d1 d2 d3 d4 d2 d3

KLINGER SWG

types CR/CRIR

Flanges in accordance with BS10, measures in inch

Nominal width

d2

d3

d4

d4

d1

d2

d3

CR CRIRSubject to technical alterations.

Status: October 2000

Certified according to 

DIN EN ISO 9001.
Pressure stage [lbs]

150

P. s. [lbs] 

300 bis 1500 300 400 600 900

Pressure stage [lbs]

1500 2500

o/I o/I o/A o/A o/I o/A o/A o/I o/A o/A

Inner

ring

Sealing

element

Centering

ring

Sealing

element

Centering ring Sealing

element

Centering

ring

d1

[inch]

d2 d3 d4 d2 d3 d4 d2 d3 d4

Nominal width

d2

d3

d4

d4

d1

d2

d3

CR CRIR

Pressure stage [lbs]

Subject to technical alterations.

Status: 1995

Certified according to 

DIN EN ISO 9001.

Flanges in accordance with BS 3381, ANSI B 16.5, measures in inch

KLINGER SWG

types CR/CRIR
Pressure stage [lbs]

150

P. s. [lbs] 

300 bis 1500 300 400 600 900

Pressure stage [lbs]

1500 2500

o/I o/I o/A o/A o/I o/A o/A o/I o/A o/A

Inner

ring

Sealing

element

Centering

ring

Sealing

element

Centering ring Sealing

element

Centering

ring

d1

[inch]

d2 d3 d4 d2 d3 d4 d2 d3 d4

Nominal width

d2

d3

d4

d4

d1

d2

d3

CR CRIR

KLINGER GmbH

P.O. Box 1370, D-65503 Idstein

Rich.-Klinger-Straße, D-65510 Idstein

Tel +49 (0) 61 26 950-0

Fax +49 (0) 61 26 950 340/341

e-mail: mail@klinger-gmbh.de

http://www.klinger-gmbh.de

Subject to technical alterations.

Status: 1995

Certified according to 

DIN EN ISO 9001.

Flanges in accordance with BS 3381, ANSI B 16.5, measures in inch

KLINGERmaxiflex

types CR/CRIR
d2

d3

d4

d4

d1

d2

d3

CR CRIR

150 300 600

[mm] [inch] o/I o/A

Sealing

element

Pressure stage [lbs]

d2 d3

o/A

Centering

ring

d4

Nominal width

o/I o/A

Sealing

element

d2 d3

o/A

Centering

ring

d4

o/I o/A

Sealing

element

d2 d3

o/A

Centering

ring

d4

o/I o/A

Sealing

element

d2 d3

o/A

Centering

ring

d4

900

o/I o/A

Sealing

element

d2 d3

o/A

Centering

ring

d4

1500

o/I o/A

Sealing

element

d2 d3

o/A

Centering

ring

d4

2500

Nominal width

Subject to technical alterations.

Status: 1995

Certified according to 

DIN EN ISO 9001.

In accordance with the french standard NF–M–87621,

measures in mm

KLINGER SWG

types CR/CRIR
d2

d3

d4

d4

d1

d2

d3

CR CRIR

150 300 600

[mm] [inch] o/I o/A

Sealing

element

Pressure stage [lbs]

d2 d3

o/A

Centering

ring

d4

Nominal width

o/I o/A

Sealing

element

d2 d3

o/A

Centering

ring

d4

o/I o/A

Sealing

element

d2 d3

o/A

Centering

ring

d4

o/I o/A

Sealing

element

d2 d3

o/A

Centering

ring

d4

900

o/I o/A

Sealing

element

d2 d3

o/A

Centering

ring

d4

1500

o/I o/A

Sealing

element

d2 d3

o/A

Centering

ring

d4

2500

Nominal width

KLINGER GmbH

P.O. Box 1370, D-65503 Idstein

Rich.-Klinger-Straße, D-65510 Idstein

Tel +49 (0) 61 26 950-0

Fax +49 (0) 61 26 950 340/341

e-mail: mail@klinger-gmbh.de

http://www.klinger-gmbh.de

Subject to technical alterations.

Status: 1995

Certified according to 

DIN EN ISO 9001.

In accordance with the french standard NF–M–87621,

measures in mm

KLINGERmaxiflex

types CR/CRIR