xp HELICOFLEX GB - Tekva

ET 512E0130

High performance sealing HELICOFLEX®

Garlock Sealing Technologies


INTRODUCTION OF HELICOFLEX SEAL FOREWORD

The Helicoflex seal has been created with the technical collaboration of the French Atomic Energy Commission (CEA). It is an elastic metallic seal which results from a long experimentation and which has proved its efficiency in many fields from research to industry. Its basic concept (sealing lining + spring) allows, through the technical knowledge of Cefilac, to adjust the characteristics and the shapes of the seal to your assembly and to meet the sealing requirements.

HELICOFLEX SEALING CONCEPT

The sealing concept of the Helicoflex seal is based on viscoplastic deformation of a metallic lining. This lining is selected based on its plasticity, which has to be better than the flange material plasticity. Such deformation is obtained by compressing a helicoidal spring. The spring gives to the Helicoflex seal its remarkable elasticity. The choice of the spring characteristics allows: ● to adjust compression load based on type of lining material and required sealing level. ● to control the load needed to ensure a permanent contact between the flanges. The use of a helicoidal spring with joined coils as the elastic core ensures, thanks to the individual action of each coil, an outstanding level of adaptability to flange geometry and defects.

Plasticity

Resiliency

)

All metal

GENERAL CHARACTERISTICS ● ● ● ● ● ● ●

2

DN 4 to 8000 mm Ø 1,5 to 40 mm cross section Sealing level from bubble tightness up to 10 -12 Pa m3.s Temperature from -272 up to 800°C Pressure from 10-10mbar up to 3000 bar Very good resistance to radiation Very good resistance to corrosion

● ●

●

Extended life time Adaptable to all types of sealing surfaces (FF, RF, TG, Groove, ….) (3 faces, radial, shaped, …) Adaptable to all flange standards (PNEUROP, ANSI, ISO, …)


METAL TO METAL ASSEMBLY

The metal/metal assembly consists in generating a solid mechanical contact independent of the active part of the seal. The seal elasticity is completely dedicated to maintaining the sealing. This concept protects the seal from overtightening.

Before tightening

After tightening

ADVANTAGES OF THE METAL/METAL CONTACT ●

Optimized compression

●

Minimum elastic deformation required

●

Rigid assembly

●

Excellent withstanding of thermal transients

CONTROL OF THE COMPRESSION The Helicoflex seal requires, in case of a static sealing application, controlled compression either by means of a groove A or by means of a built-in compression limiter B . In case of a semi-static application, it requires a controlled seating load C . AFTER TIGHTENING

BEFORE TIGHTENING

A HN

HL HELICODUR

HN

B

HL HELICODUR

B HN

HN

B HN

HN

A HNDE Double tore mixte

HNDE Composite double section

Controlled load HND Double tore métallique

C

HND Double tore métallique

3

HELICOFLEX SEAL ADAPTABLE TO EVERY APPLICATION


N.mm-1

BASIC VERSION

- Used in most cases with single or double lining • Single or double C.S. in the various types or shapes mentioned in pages 8 to 13

HELICOFLEX HN

standard circular Cross Section (C.S.)

ADAPTABILITY BY THE SEAL GEOMETRY N.mm-1

HLO

The seal section is oval and allows its use in trapezoidal groove in place of RTJ gaskets

The grinding of the spring according to an angle ß perfectly gives the possibility to modulate the seal tightness

N.mm-1

HNR

wire section N.mm

-1

HL

Has an internal limiter to control the compression Used in a non metal to metal assembly Accepts a retightening

ß

Particular shape of the seal resulting in a lower point for initial sealing level Yo as well as for sealing point Y2

N.mm-1

HNV

ADAPTABILITY BY THE MATERIAL CHOICE Sealing lining : Aluminum - Gold - Silver - Iron - Copper - Brass - Soft steel - Nickel - Monel - Tantalum - Stainless steel (304L - 316L - 321 - 316 Ti) - Zirconium - Inconel (600 - 625) - Hastelloy - Titanium. Spring : Music wire XC80 - H.T.A. (High Temperature Alloy). ADAPTABILITY BY THE DESIGN FLEXIBILITY

GROOVE

RADIAL

CONICAL FLANGE

TONGUE & GROOVE

3 FACES CONTACT

PUPPET VALVE

RAISED FACE

BUTTERFLY VALVE

LEAK CHECK

ADAPTABILITY TO THE APPLICATION Helicoflex/rubber Section Double Helicoflex Section Seal with spacer Seal with leak check

Very large seal Seal with rib Seal with clip

But also : for Pneurop flanges, for conical flanges, remote handling, for valves. 4

Shaped seal oblong, square with PTFE coating

…


APPLICATION FIELDS

TRANSPORT

RESEARCH

SPACE

NUCLEAR (NPP)

CHEMICAL/PETROCHEMICAL

CRYOGENICS

HELICOFLEX®

ULTRA HIGH VACUUM

NUCLEAR (Fuel)

AUTOMOTIVE

SEMI-CONDUCTORS

5


GUIDELINE FOR USING & DIMENSIONING RECOMMENDATIONS SEALING CRITERIA The characteristic values given in this catalog are designed to meet 2 distinct sealing criteria : ● The “bubble tight” sealing corresponding to a gaseous flow of air ≤ 10-5 Pa.m3.s-1 (10-4 Atm.cm3/s) under 1 bar ∆ P. ● The Helium sealing corresponding to a gaseous flow of Helium ≤ 10-11 Pa.m3.s-1 (10-10.Atm.cm3/s) under 1 bar ∆ P. Some lower gas flow (10-12 Pa.m3.s-1) can be achieved

according to the choice of the lining, but that requires a super polishing of the seal and of the sealing surfaces.

SURFACE FINISH The sealing level of the Helicoflex seal is directly and closely related to the quality of the surface finish of the sealing areas. The sealing surface finish is critical from

both roughness and method of machining standpoints. Lathe finishes have to be recommended for circular seals ; milling should be avoided. The below table summarizes these recommendations.

●

The choice of sealing criteria according to the different assembly requirements (gas sealing, liquid sealing, toxicity, pollution, …) must be done before designing the assembly due to the consequences of this choice on the characteristic values.

Circular seals for use on turned surface N° LCA - CEA Ra in µm Rt in µm µ. inches

N10 12,5 50 500

N9 6,3 37 250

N8 3,2 21 125

N7 1,6 11 63

N6 0,8 6,2 32

N5 0,4 3,4 16

N4 0,2 1,9 8

Plating (Pb, Sn, In) PTFE - FEP Aluminum Silver, copper, iron Nickel, stainless steel not recommended (please consult us)

correct values acceptable

correct values recommended

Note : The sealing areas must be turned by lathe. It is not recommended to try to get the required roughness by polishing with abrasive paper. This process must be reserved

for refurbishing damaged sealing surface. This polishing has to be done in the same circular way as machining by lathe.

SHAPE SEALS (rectangular, oblong, ….) FOR USE ON MACHINED SURFACE The surfaces, using shape seals, are obtained with processes less favorable to the sealing performance than lathe machining. By consequence, the seal requires a design, compared

to the circular seal, with a stiffer spring . For non circular seals, the sealing surface finish has to be better whatever the lining (Ra = 0,4 à 0,8 µm). In case the roughness can not be obtained, a specific tool generating preferential polishing lines can be recommended.

●

FLATNESS TOLERANCE Thanks to its spring concept, the Helicoflex seal accepts flatness defects. The following flatness tolerances can be acceptable on the flange assembly (cumulated value for both flanges). A local defect could generate a lack of compression that shall not exceed 20% of the nominal value.

dimensions

amplitude*

tangential* slope

radial* slope

DN 10 to 500

0,2 mm

0,1/100

1/100

DN 500 to 2000

0,4 mm

0,2/100

2/100

DN 2000 to 5000

0,8 mm

0,5/100

3/100

• Average value to adjust according to the cross section. 6


CHARACTERISTIC VALUES LOAD VERSUS DEFLECTION CURVE

The compression and decompression cycle of the Helicoflex seal shows a progressive flattening of the curve. The position of this step is selected according to the required sealing and the lining material.

Y0 = Linear load from where the required sealing level is obtained. Y2 = Linear load to reach the seating point and the metal to metal contact.

Linear load (N.mm-1)

Y2

deco mpr essio n

e2 = Compression value to get the metal to metal contact. It is related to the linear load Y2 and determines the groove depth.

Ym

com pres sion

Y0

ec = Critical compression value beyond which the sealing level could deteriorate. (1)

deflection mm

Y1 e0

e1

em e2

Permanent deformation

Ym = Minimum linear load to maintain sealing in service. It varies according to the pressure and the temperature

ec

em = Compression values related to Ym below which the sealing level is lost. (1) Function of P & T. (1)

Useful elastic recovery

Nota : Ym for T = 20°C & P = 1 bar is named Y1, and em is e1

PRESSURE/TEMPERATURE CHART

N.mm-2 (MPa)

Pu = Maximum pressure : it is the maximum pressure that the seal can withstand at a certain temperature. Pu 20° = Maximum pressure at room temperature (20°C) Pu = Maximum pressure at service temperature. maxi = This value allows the Ym calculation. Temperature where Pu is closed to zero.

VALUES TO TAKE INTO ACCOUNT FOR THE HELICOFLEX CALCULATION (page 9) Refer to tables, page 8, for standard seals and page 12 for Helicoflex delta HNV. Consult us for all other specific seals (Helicoflex beta HNR, shape seals, Omicron, …) The Y2, e2, ec, Y1 values are directly readable in the tables. 2 values (Pu et Pu) allow to linearly interpolate Pu with a safety margin. Ym is calculated with P, Pu, Y1, Y2 (see page 9). 7


Lining : SILVER

1,6 (1,6 à 1,8) 2 (1,9 à 2,1) 2,2 (2,2 à 2,4) 2,6 (2,5 à 2,9) 3,1 (3 à 3,4) 3,6 (3,5 à 3,9) 4,2 (4 à 4,4) 4,7 (4.5 à 4,9) 5,2 (5 à 5,4) 5,7 (5.5 à 5,9) 6,2 (6 à 6,9) 7,2 (7 à 7,9) 8,4 (8 à 8,9) 9,4 (9 à 9,9) 10,8 (10 à 10,9) 11,8 (11 à 12,9) 12,95 (12,95 à 14,9) 15,8 (15 à 16,9) 17,8 (17 à 18,9) C.S. (mm)

Lining : COPPER SOFT IRON MILD STEEL

1,7 (1,6 à 1,8) 1,9 (1,9 à 2,1) 2,34 (2,2 à 2,4) 2,74 (2,5 à 2,9) 3,24 (3 à 3,4) 3,84 (3,5 à 3,9) 4,34 (4 à 4,4) 4,84 (4,5 à 4,9) 5,34 (5 à 5,4) 5,84 (5,5 à 5,9) 6,34 (6 à 6,9) 7,54 (7 à 7,9) 8,54 (8 à 8,9) 9,94 (9 à 9,9) 10,94 (10 à 10,9) C.S. (mm)

Lining : NICKEL MONEL TANTALUM

Lining : STAINLESS INCONEL TITANIUM ZIRCONIUM

1,6 (1,6 à 1,8) 2 (1,9 à 2,1) 2,4 (2,2 à 2,4) 2,6 (2,5 à 2,9) 3,2 (3 à 3,4) 3,7 (3,5 à 3,9) 4,2 (4 à 4,4) 4,7 (4,5 à 4,9) 5,2 (5 à 5,4) 5,9 (5,5 à 5,9) 6,4 (6 à 6,9) 7,4 (7 à 7,9) 8,4 (8 à 8,9) 9,8 (9 à 9,9) 10,94 (10 à 10,9)

C.S. (mm) 1,6 (1,6 à 1,8) 2 (1,9 à 2,1) 2,4 (2,2 à 2,4) 2,6 (2,5 à 2,9) 3,2 (3 à 3,4) 3,7 (3,5 à 3,9) 4,2 (4 à 4,4) 4,7 (4,5 à 4,9) 5,2 (5 à 5,4) 5,9 (5,5 à 5,9) 6,4 (6 à 6,9) 7,4 (7 à 7,9) 8,4 (8 à 8,9) 9,8 (9 à 9,9) 10,6 (10 à 10,9)

0,7 0,85 0,9 0,9 1 1 1,1 1,2 1,4 1,6 1,8 2,2 2,6 3 3,5 3,8 4,6 5,4 6,2 7 9 12

150 160 165 175 185 190 200 210 220 230 245 270 290 325 350 375 400 465 540 725 925 1160

COMPRESSION e2 (mm) 0,5 0,6 0,6 0,7 0,8 0,8 0,8 0,8 0,8 0,8 0,9 0,9 0,9 0,9 1 1 1,2 1,2 1,3

± 0,05 ± 0,05 ± 0,05 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,15 ± 0,15 ± 0,15

eC (mm) 0,6 0,7 0,8 0,9 1 1 1,1 1,1 1,3 1,4 1,7 2 2,4 2,7 3,1 3,4 4,2 5 5,8

0,5 0,6 0,6 0,7 0,7 0,7 0,8 0,8 0,8 0,8 0,9 0,9 0,9 0,9 1

± 0,05 ± 0,05 ± 0,05 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1

ec (mm) 0,6 0,7 0,8 0,9 1 1 1,1 1,1 1,3 1,4 1,7 2 2,4 2,7 3,1

0,4 0,5 0,5 0,6 0,6 0,6 0,7 0,7 0,7 0,7 0,8 0,8 0,8 0,8 0,9

± ± ± ± ± ± ± ± ± ± ± ± ± ± ±

0,05 0.05 0,05 0,05 0,05 0,05 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1

ec (mm) 0,5 0,6 0,7 0,8 0,9 0,9 1 1 1,1 1,3 1,6 1,8 2,1 2,4 2,7

200 220 230 240 260 280 300 320 340 360 400 440 490 540 600 640 680 1100 -

0,4 0,5 0,5 0,6 0,6 0,6 0,7 0,7 0,7 0,7 0,8 0,8 0,8 0,8 0,9

± ± ± ± ± ± ± ± ± ± ± ± ± ± ±

0,05 0,05 0,05 0,05 0,05 0,05 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1

ec (mm) 0,5 0,6 0,7 0,8 0,9 0,9 1 1 1,1 1,3 1,6 1,8 2,1 2,4 2,7

Y1 N.mm-1

30 30 35 45 50 50 55 60 60 65 70 80 90 100 110 130 150 200 -

50 52 53 55 55 55 60 60 63 65 67 70 72 75 75 80 82 84 85 90 90 90

5 10 14 17 20 22 24 25 28 32 33 36 38 40 42 43 45 45 45

90 100 105 115 130 140 150 160 170 180 195 205 225 235 245 255 295 345 400 550 700 900

65 65 70 75 85 95 105 115 125 135 150 160 170 180 185 185 185 190 -

6 8 14 22 27 31 36 40 47 54 60 67 73 81 88 95 -

Y1 N.mm-1

260 280 300 320 350 390 430 470 510 550 630 740 860 990 -

40 50 60 70 80 80 90 100 110 120 140 160 190 220 -

10 11 13 17 20 23 27 30 33 36 40 45 49 52 -

150 150 160 170 180 190 200 220 230 250 270 300 350 390 440 520 580 740 860

Y1 N.mm-1

320 350 390 450 440 580 640 700 780 850 -

80 80 90 100 110 120 140 150 180 200 -

190 200 220 230 250 270 290 320 330 360 420 460 530 600 670

11 16 21 27 34 40 45 52 57 62 -

Y1 N.mm-1

350 400 450 500 575 660 750 825 -

100 100 110 120 130 150 170 220 -

200 220 230 270 300 340 380 420 460 500 560 650 730 820 920

25 27 29 32 36 39 42 45 -

30 30 30 40 45 45 50 50 50 60 60 65 70 80 90 100 120 140 170

40 40 40 45 50 55 60 70 80 90 110 125 140 150 155 155 155 155 155

Y1 N.mm-1

Y1 N.mm-1

60 60 70 70 80 90 100 110 110 120 130 150 160 170 200

4 5 9 13 16 19 22 25 30 36 42 48 54 60 67 71 73

35 35 35 40 40 45 45 45 50 50 55 60 65 70 75

5 6 8 10 12 15 17 19 21 23 26 29 32 35 37

Pu 20° Pu 350° N.mm-2 N.mm-2

40 42 44 47 50 54 57 60 65 67 72 78 83 87 90

300 320 350 380 425 470 520 560 600 650 720 800 900 1000 1070

T °C maxi Recommended surface finish °C 150 150 180 220 250 250 280 280 300 320 340 340 360 380 380 400 400 430 430 450 450 450

T °C maxi Recommended surface finish °C 240 240 280 280 300 300 350 370 370 400 450 450 500 500 500 550 550 550 550

T °C maxi

Pu 20° Pu 300° N.mm-2 N.mm-2

7 9 12 16 20 23 27 30 33 37 41 45 50 53 56

BUBBLE SEALING

Pu 20° Pu 400° Y2 N.mm-2 N.mm-2 N.mm-1

90 91 92 97 100 104 107 110 -

Pu 20° Pu 250° N.mm-2 N.mm-2

BUBBLE SEALING

HELIUM SEALING Y2 N.mm-1

5 10 14 17 20 22 24 25 28 31 32 33 35 36 38 39 40 40 40

Y1 N.mm-1

30 40 50 60 70 70 80 80 90 100 100 110 130 140 160

Pu 20° Pu 350° Y2 N.mm-2 N.mm-2 N.mm-1

70 72 76 82 87 93 96 105 110 115 -

35 40 40 42 45 47 50 52 55 57 60 65 68 72 73 77 80 82 82 85 85 85

BUBBLE SEALING


Pu 20° Pu 200° MPa MPa

BUBBLE SEALING

Pu 20° Pu 300° Y2 N.mm-2 N.mm-2 N.mm-1

50 50 55 60 65 70 70 80 85 90 95 100 110 150 -

Y1 N.mm-1

20 20 20 20 20 20 20 20 25 25 30 35 40 50 50 60 65 75 90 100 150 200

Pu 20° Pu 250° Y2 N.mm-2 N.mm-2 N.mm-1


COMPRESSION e2 (mm)

BUBBLE SEALING

Pu 20° Pu 200° Y2 MPa MPa N.mm-1

HELIUM SEALING

COMPRESSION e2 (mm)

20 20 20 20 25 25 25 25 30 30 35 40 50 55 60 70 80 90 110 130 190 250

Y2 N.mm-1

COMPRESSION e2 (mm)

Y1 N.mm-1

°C

350 350 360 380 380 400 420 450 450 480 520 520 550 580 580

Pu 20° Pu 400° N.mm-2 N.mm-2

80 80 90 100 110 130 150 180 190 200 220 260 290 340 370

47 50 52 57 62 67 72 77 82 87 94 102 108 115 120

6 8 11 15 20 25 30 34 37 42 47 52 58 62 66

380 380 420 450 480 500 550 600 650 650 650 650 650 650 650

°C

420 420 480 500 500 550 600 650 700 700 700 700 700 700 700

Please consult us for the material not listed, the coated seals (Lead, tin, indium, FEP, gold, silver,…). For the Helicoflex beta HNR see page 13. For Helicoflex delta HNV, see page 12. For radial or 3 faces compression, see page 11. 8

Recommended surface finish

T °C maxi Recommended surface finish °C

T °C maxi

Y1 N.mm-1

1,6 to 3,2 µm

± 0,05 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,15 ± 0,15 ± 0,15 ± 0,2 ± 0,25 ± 0,3


1,6 to 3,2 µm

C.S. (mm)

0,6 0,7 0,7 0,7 0,8 0,8 0,9 0,9 0,9 0,9 1 1 1 1 1,1 1,1 1,2 1,3 1,5 2 2,8 3,5

e2 (mm)

1,6 to 3,2 µm

Lining : ALUMINUM GOLD

1,6 (1,6 à 1,8) 2 (1,9 à 2,1) 2,2 (2,2 à 2,4) 2,6 (2,5 à 2,9) 3 (3 à 3,4) 3,5 (3,5 à 3,9) 4 (4 à 4,4) 4,5 (4,5 à 4,9) 5,1 (5 à 5,4) 5,6 (5,5 à 5,9) 6,6 (6 à 6,9) 7,6 (7 à 7,9) 8,6 (8 à 8,9) 9,8 (9 à 9,9) 10,8 (10 à 10,9) 11,8 (11 à 12,9) 14,2 (13 à 14,9) 16,2 (15 à 16,9) 18,2 (17 à 18,9) 19 à 25 26 à 30 31 à 40

COMPRESSION e2 (mm)

0,8 to 1,6 µm

C.S. (mm)

Recommended surface finish

0,8 to 1,6 µm

TABLE OF CHARACTERISTIC VALUES (standard HN, axial compression)


CALCULATION DATA FOR HELICOFLEX SEAL

The tightening load for a Helicoflex seal can be calculated according to the CODAP (Annexe C6A4) or by analogy with the calculation done for the flat gaskets. We can supply calculation data sheet according to the following process: PARAMETERS Dj Y2 Y1 P Et20° Ets Pu Pu

Formula

Mean diameter of the seal Linear seating load of the seal Threshold of sealing lost at 20°C/1bar Calculation pressure (working, design or test) Young modulus of the bolt material at 20°C Young modulus of the bolt material at calculation temperature Max pressure at 20°C Max pressure at design P & T

Units mm N.mm-1 N.mm-1 MPa MPa MPa MPa MPa

CALCULATION OF THE MINIMUM TIGHTENING LOAD Fj FF Ym Fm FS FS* FB

Seating load of the seal Hydrostatic force from the pressure Minimum linear load to keep the sealing Minimum load to keep the sealing Total load to insure the sealing Total load taking into account the young modulus compensation FORCE TO BE APPLIED TO THE BOLTS

= = = = = = =

π x Dj x Y2 π/4 x Dj2 x P Max (Y1 ; Y2 x P/Pu) π x Dj x Ym Ff + Fm Fs x Et20°c/Ets* Max (Fj ; FS*)

N N N.mm-1 N N N N

Note: if P x Dj ≥ 32 x Ym : Ym = Y2

CALCULATION OF THE BOLT STRESS SB Nb

Resistant section of the bolt Number of bolts

a ts

Stress in the bolts at room temperature

= FB x NB / SB

Stress in the bolts at calculation temperature

=

mm2

a x Ets / Et20°

MPa MPa

CALCULATION OF THE TORQUE p d2 Dm µ Cs Cs

Pitch of the bolt Diameter on thread side Diameter of the contact under the screw head Friction coefficient of the screw and the nut Torque value in N.mm Torque value in N.m

mm mm mm = FB/Nb x (0,16xp+µx(0,58xd2+Dm/2)) N.mm = Cs (N.mm)/1000 N.m

9


GUIDE FOR USE AND DIMENSIONING DIMENSIONING OF THE SEALS ACCORDING TO THE ASSEMBLY AXIAL COMPRESSION

Internal pressure P ≥ 20 bars ● Groove assembly : at the end of compression the seal should be in contact with and supported by the groove wall opposed to the pressure side. h = d - e2 J Ø d (C.S.) Internal pressure Ø B = OD - J 0,3 1,5 à 3,4 Ø A ≥ ID + 2e2 + 0,5 0,5 3,5 à 6,9 J = clearance between seal OD and Groove OD 0,7 7 à 9,9 J = f (d) (see table) 0,9 > 10

ØB ØA e2

h

External pressure P ≥ 20 bars It is the groove ID which has to contact & support the seal

d ID

OD

Pressure P < 20 bars The seal can be centered in the groove without radial contact with a minimum groove width w ≥ Seal cross section + 2e2 + 0,5 mm

Grooves on metal-metal contact flanges

RADIAL COMPRESSION

ØC g

g = Ø C.S. + e3 + 0,2 I = 10e3

+0,05 -0

ØB

Ø A ±0,05 l

-0,1 +0

Ø C +0 -0,05

g l

ØB≤Ø Ø A = Ø + 2e3

Ø A ±0,05

Ø B +0,1 +0

g

Ø A ±0,05 l

l

ØB≥Ø Ø A = Ø - 2e3

Ø A ±0,05

g

A radial compression is possible with Helicoflex seal by using the adapted types : HN 110, 210, 160, 180, … The system offers both options : internal and external compression. The internal compression expands the inner diameter and the external compression restrains the outside diameter. The main precautions to take concern the material to be used and the roughness of the surface finish of the sealing area which must be smooth (Ra ≤ 0,8 mm) and lubricated during the assembly with a spray (PTFE, graphite, Molybdene, silicone, oil, …) compatible with the media. The seal should be maintained in its housing with axial contact. The compression has to be progressive ≤ 0,1 mm per mm of motion Aluminum Silver Copper Nickel Stainless Steel Ø mm

mm

e3

Ya Nmm-1

Ø mm

mm

e3

Ya Nmm-1

Ø mm

mm

e3

Ya Nmm-1

Ø mm

mm

e3

Ya Nmm-1

Ø mm

mm

e3

Ya Nmm-1

1,6 2,6 3 4 5,1 6,6 8,6 10,8

0,30 0,35 0,40 0,50 0,50 0,60 0,60 0,70

19 24 27 32 36 41 47 51

1,6 2,6 3,1 4,2 5,2 6,2 8,4 10,8

0,25 0,30 0,35 0,45 0,45 0,50 0,50 0,60

30 34 36 40 46 54 70 88

1,7 2,34 3,24 4,34 5,34 6,34 8,54 10,94

0,20 0,25 0,30 0,40 0,40 0,45 0,45 0,50

38 44 50 58 66 80 106 134

1,6 2,6 3,2 4,2 5,2 6,4 8,4 10,6

0,20 0,25 0,30 0,40 0,40 0,45 0,45 0,50

40 54 60 76 92 112 146 184

1,6 2,6 3,2 4,2 5,2 6,4 8,4 10,6

0,20 0,25 0,30 0,40 0,40 0,45 0,45 0,50

60 76 84 104 120 144 180 214

10


GUIDE FOR USE AND DIMENSIONING 3 FACE COMPRESSION

140 - 240

140 - 240

30° Type HN (150 - 250) J

45° Type HN (150 - 250) J 45°

30°

J≤øC.S./10

h p

+0

Ø b -0,05

e

+0

Ø b -0,05

e

h D = shaft Ø + 2 h

D = shaft Ø + 2 h

100-200

60° Type HN (120-220) J

e b

Ø

60°

+0 -0,05

h D = shaft Ø + 2 h

h 45°

30° section d

Aluminum

2,6 3,2 4,2 5,2 6,4 8,4 10,6

section d

3,30 4,00 5,25 6,60 8,15 10,90 13,80

60°

Other linings

Aluminum

Other linings

Aluminum

Other linings

3,20 4,00 5,25 6,60 8,15 10,90 13,80

4,15 5,05 6,60 8,30 10,20 13,60 17,25

4,00 5,05 6,60 8,30 10,20 13,60 17,25

3,20 4,00 5,40 6,90 8,60 11,60 14,80

3,40 4,20 5,60 7,10 8,80 11,80 15,00

Note : These values take into account the lining overlap (30° et 45°) Characteristic values The axial linear tightening load Ya and compression value e, can be obtained from Y2 and e2 values given page 8, corrected by factors K and a. Axial linear load: Y0 = KY2 Axial compressive movement: e = a e2 ●

●

Coefficient

30°

45°

60°

a

2

1,4

1,15

K

0,9

1,2

1,4 11


HELICOFLEX DELTA HNV Patented system CEA - CEFILAC, Licence CEA

CONCEPT OF THE SEALING & APPLICATION FIELDS The Helicoflex seal ∆ has 2 knife edges at the contact line of the cross section. The height and the shape of these knife edges have been designed so as to disappear during the compression for ductile linings (Aluminum, Silver, Copper) ● This aptitude avoids any risk of creep over time or during bake out and thermal cycles ● The non ductile linings present very limited risk of creeping and by consequence do not require the disappearing of the knife edge during the compression ● In every case, the exceptional elastic spring back of the Helicoflex seal ∆ can compensate its own creeping and authorize its use at high temperature according to the lining. ● The Helicoflex seal ∆ requires a lower tightening load than the one necessary for metallic seals, THAT AUTHORIZES ELASTOMER REPLACEMENT (for example replacement of FKM O.Rings on the ISO/PNEUROP standard flanges). ● ●

HELICOFLEX® ∆ ● Very high sealing performance ● Low tightening load

ductile linings

APPLICATIONS FIELDS

non-ductile linings


Ultra high vacuum ● Space & Satellite ● Semiconductor ●

HELICOFLEX® ∆ Technical information Dimensions : Ø 10 to 2000 mm Temperature : -272 to 520°C (ductile linings). -272 to 700°C (non ductile linings). Sealing level : Q ≤ 10 .12Pam3/s

Linear load N.mm-1)

∆

∆ ∆

∆ ∆

∆ compression mm

∆

∆ compression mm

Note : HELICOFLEX® ∆ = HNV (The V designates the ∆ type). TABLE OF CHARACTERISTIC VALUES CIRCULAR SEALS (SHAPED SEALS : please consult us) DUCTILE LININGS

HELICOFLEX® ∆ HELIUM SEALING

Aluminum Silver Copper Ø C.S. Ø C.S. Ø C.S. Y2 e2 HV T° Y2 e2 HV T° Y2 e2 HV T° on Type on Type on Type th th th N.mm-1 mm mini maxi N.mm-1 mm mini maxi N.mm-1 mm mini maxi mm ridges mm ridges mm ridges 2 2,7 3,4 4,9 5,8 6,9

1,9 2,6 3,3 4,8 5,6 6,7

HNV 100 HNV 200 HNV 200 HNV 200 HNV 200 HNV 200

100 140 140 140 150 150

0,6 0,7 0,8 0,9 1 1,1

65 65 65 65 65 65

150 220 250 280 320 340

1,8 2,5 3,2 4,8 5,6 6,7

1,7 2,4 3,1 4,7 5,4 6,5


NON-DUCTILE LININGS

150 160 160 160 170 180

0,5 0,6 0,6 0,8 0,8 0,9

100 100 100 100 110 120

240 280 300 370 400 450

1,74 2,44 3,14 4,64 5,54 6,54

1,64 2,34 3,04 4,54 5,34 6,34


150 180 180 180 180 190

0,34 0,44 0,54 0,64 0,64 0,74

110 120 120 120 120 130

350 380 380 450 480 520

HELICOFLEX® ∆ HELIUM SEALING

Nickel

Ø C.S. on th mm ridges

Stainless steel - Tantalum Inconel Ø C.S. Ø C.S. Y2 e2 HV T° Y2 e2 HV T° Y2 e2 HV T° Type Type on on Type th th -1 -1 -1 N.mm mm mini maxi N.mm mm mini maxi N.mm mm mini maxi mm ridges mm ridges

1,6 2,4 3,3 4,7 5,2 6,2


12

1,5 2,3 3,2 4,6 5,1 6,1

150 180 200 230 290 360

0,25 0,30 0,35 0,40 0,45 0,50

140 140 150 170 190 210

380 420 480 600 650 650

1,6 2,4 3,3 4,7 5,2 6,2

1,5 2,3 3,2 4,6 5,1 6,1


160 180 200 230 290 360

0,25 0,30 0,35 0,40 0,45 0,50

140 150 160 170 190 210

420 480 500 650 700 700

1,5 2,4 3,3 4,5 5,4 6,2

1,4 2,3 3,2 4,4 5,3 6,1


160 200 230 250 340 400

0,25 0,30 0,35 0,40 0,45 0,50

140 150 170 180 200 220

450 500 550 700 700 700

OTHER TYPES OF HELICOFLEX SEALS


HELICOFLEX BETA HNR Sealing principle : the spring of the Helicoflex ß is ground all around (see sketch) so as to have a better distribution of the spring reaction on the seal lining. The load reduction compared to the Y2 value is theoretically 30 % but we would like to be consulted to design these seals. Characteristic curve


Helicoflex® HN with round wire

Helicoflex® -ßéta HNR

with segment of circle wire ß

mm compression Avantages : - Tightening load reduction for the same sealing level - Good behaviour in temperature HELICOFLEX OMICRON HLO The Omicron seal is a Helicoflex seal with an internal limiter spacer which is used instead of the RTJ seals. It get the elastic characteristics of the Helicoflex seal. Due to a different contact point compared to the RTJ seal, it can be used to retrofit damaged flanges. This seal can be manufactured with soft steel, soft iron, nickel or stainless steel lining. Performances : T from -272 to +750°C P up to 1000 bar RTJ

COMPARISON RTJ / HLO 210

HELICOFLEX® OMICRON HLO 210

13

THE HELICOFLEX SEAL AND THE FLANGE NORMS

Flanges with groove


HN 200 NF 15000 series

RF & FF Flanges

HN 208 A (HN 203)

NFE 29203 NFE 29209 DIN 2632 to 2638 ASME B16-5 ASME B16-47

HN 113 HN 213 SP

Tongue & Groove Flanges

DIN 2512 DIN 2513 ASME B16-5 NFE 29203

RTJ Flanges HLO 210 ASME B16-5 NFE 29203

SEAL NORMALIZATION

Seals Norms Old norms : PN10 PN16 NF (France) DIN (Germany) 2632 2633 American norms : ASME B 16.20 ex APL 601 International norms : NF E 29 900-3* New norms : NF EN 1514-2 project EN 12560-2

Flange Norms PN25 PN40 2634 2635 150 Lbs

PN64 2636

PN100 2637

PN160 2638

PN250 PN320 PN400 2628 2629

300 Lbs

400 Lbs 600 Lbs

900 Lbs

1500 Lbs

ISO ISO ISO ISO ISO ISO

ISO

ISO

ISO

PN10 PN16 PN20 PN25 PN40 PN50

PN100

PN150

PN250

Class 900

Class 1500

PN10 PN16

Class 150

PN25 PN40

Class 300

PN63

Class 600

PN100

The information given in these tables can be modified according to the evolution of the normalization.

14

NF (France) DIN (Germany) ASME/ANSI B16.5 ASME B 16.47 série A ex MSSS-SP 44 ASME B16.47 série B ex API-605

NF E 29-203, NF E 29-209 Project EN 1092.1 EN 1759.1


NECESSARY INFORMATION FOR THE STUDY Cefilac : fax. 33 (0)4 77 43 51 52

DESIGN INFORMATION DATA Company : Sales contact : Technical contact : Reference

N° : Tel : Tel :

APPLICATION : STUDY :

Market Fax : Fax :

SERVICE CONDITIONS : Medium : State : Gas Pressure :

Service

Temperature : Service

- Liquid

- Vacuum

bar P. Test

bar

°C

°C

T. Test

ASSEMBLY

STATIC

Existing

Project

Other info (Viscosity, abrasion, sealing level, life time, cycles…)

SKETCH (or attach a drawing, to indicate the material)

SEMI STATIC

To be created or modified NORM : DN : PN : Type of face :

DIMENSIONS :

BOLTS :

APPLICATION Unit:

Equipment:

Previous solution:

Type of seal:

Material:

Supplier: Customer wish

Type of seal:

Material:

Quantity to be quoted:

Estimated annual requirement:

pcs/year

Comments:

Issuer :

To the attention of :

Date : 15

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...

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And cut gaskets CONVENTIONAL

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And assemblies GRAPHITE

Seals and rings BRAIDS

And compression packings LIP SEALS AND O’RINGS

KLOZURE

GPA - GULLIVER

Mechanical seals AUTHORIZED DISTRIBUTOR

EL A STOMER

Seals HYDRAULIC AND PNEUMATIC

P. Guichard & Associés 04 77 80 42 14

Oil seals

ET 521 E 0130

Components OTHER SEALING PRODUCTS

Garlock GmbH Postfach 21 04 64 . Falkenweg 1 D-41468 Neuss Tel. 49-21 31/34 9-0 Fax : 49-21 31/349-222 e-mail: [email protected]

Cefilac 90, rue de la Roche du Geai 42029 SAINT-ETIENNE Cédex 1 France Tél. 33-4 77 43 51 00 Fax : 33-4 77 43 51 51 http://www.helicoflex.com

Garlock (GB) Limited Hambridge Road, Newbury Berkshire RG 14 5 TG England Tel. 44-1635-38668 Fax : 44-1635-49586

Garlock Sealing Technologies

Garlock Inc 1666 Division Street Palmyra, New York 14522 Tel. 1-315/597-4811 Fax : 1-315/597-3339 http://www.garlock-inc.com

xp HELICOFLEX GB - Tekva

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