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  • Lens Ring Joint Gasket
    Lens Ring Joint Gasket

    HOT!! Lens Ring Joint Gasket supplied by Ningbo Kaxite Sealing Materials Co., Ltd., Lens Ring Joint Gasket for all styles, price varies, cheap & save.

  • Double Jacket Gasket
    Double Jacket Gasket

    HOT!! Double Jacket Gasket supplied by Ningbo Kaxite Sealing Materials Co., Ltd., Double Jacket Gasket for all styles, price varies, cheap & save.

  • Corrugated Gaskets
    Corrugated Gaskets

    HOT!! Corrugated Gaskets supplied by Ningbo Kaxite Sealing Materials Co., Ltd., Corrugated Gaskets for all styles, price varies, cheap & save.

  • PTFE Envelope Gasket
    PTFE Envelope Gasket

    HOT!! PTFE Envelope Gasket supplied by Ningbo Kaxite Sealing Materials Co., Ltd., PTFE Envelope Gasket for all styles, price varies, cheap & save.

  • Rubber Sheet
    Rubber Sheet

    HOT!! Rubber Sheet supplied by Ningbo Kaxite Sealing Materials Co., Ltd., Rubber Sheet for all styles, price varies, cheap & save.

Products

Lens Ring Joint Gaskets

> Lens ring joint used in higher pressure than 3,000 lbs. > These gaskets had been used on pipe flanges in synthesizing line.


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Description


Lens ring

Metal lens gasket

High pressure pipe connection, the widely used lens gasket sealing structure.Lens gasket seal face were spherical, contact with the pipeline cone sealing faces, the initial state for a loop.Under the pre-tightening force, lens pad in contact produce plastic deformation, the loop into a ring, good sealing performance.Due to the contact surface is made up of spherical and cant naturally formed, in a gasket is easy.Lens gasket seal belongs to forced sealing, sealing surface for spherical surface and conical surface contact, easy appear indentation, poor interchangeability of parts.In addition, the gasket manufacturing cost is higher, processing also more difficult.


Metal lens gasket performance characteristics:

1, high temperature resistant, resistant to high pressure, suitable for high pressure flange;
2, reliable sealing persistent;
3, to adapt to the working conditions of pressure and temperature fluctuations;

Metal lens gasket application scope: general machinery industry in our country the current Angle type high pressure valve end flange, USES the lens gasket seal, apply to the nominal pressure of 16.0 ~ 32.0 Mpa.Nominal diameter is 3 ~ 200 mm;Use temperature was minus 30 ~ 200 oC, often used for sealing of high-pressure hydrogen acid medium.

Metal ring gasket first comes from the United States, in the 1920 s, the first to use in boiler, then used for manhole cover, autoclave other Windows sealed, later in the oil production and refining industry particularly valued.With the increase of temperature and pressure of the steam power plant, metal ring gasket have been used more and more widely.

Metal lens gasket main structural forms:

Metal lens gasket material selection:

material Maximum hardness mark oC
Brinell HB Rocknell HB Min Max
Soft Iron 90 56 P -40 540
Low C/S 120 68 S -60 500
SS410 170 86 S410 -40 850
SS304 160 83 S304 -250 540
SS316 160 83 S316 -200 815
SS347 160 83 S347 -200 870
4-6%Cr,0.5% Mo, 130 72 F5 -40 650
Copper 80 - C -100 315
Aluminum 35 - A -200 425
Inconel 600 150 78 Y -100 1095
Inconel 825 150 78 W -100 1095
Monel 400 150 78 M -100 760
Titanium 215 77 T -200 540
Nikel 200 110 58 N -200 760
Hastelloy B2 230 121 X1 -100 1095
Hastelloy C276 210 110 X2 -100 1095

The size of the metal lens gasket limit deviation:

Name of size Generation of no. Limit deviation
Ring pad pitch diameter P + / - 0.18
The width of the ring gasket A + 0.20 - 0
The height of the ring gasket H + 0.20 - 0
Metal lens mat bottom width C + 0.20 - 0
23 o Angle Plus or minus 0.15 o
Radius of ring gasket R + / - 0.4
Metal lens mat all 23 o Angle of the plane, the surface roughness shall be no greater than 0.8 microns

Metal lens gasket main performance parameters:


Coefficient of gasket
m=5.50-6.50
Gasket using pressure <=32MPa
Gasket using temperature - 196 oC to 1000 oC
Than the minimum preload pressure y=126.6-182.8MPa

Metal lens pad technology standards:

Can provide any size of standard and non-standard, including API 6 a, ASME B16.20, DIN 2693-67, JPI - 7-23-72 - s, DIN - 2696-1999 and other standards.

Domestic relevant standards:

JB/T 2777-1992 | PN16.0 ~ 32.0 MPa without aperture lens gasket
JB/T 2776-2010 | valve parts high-pressure lens pad
JB90-1959 type of flange sealing surface lens with metal gasket

Does the actual application condition is complex, the above parameters are for reference only do not make any guarantee is requested.Metal lens gasket material selection:

material Maximum hardness mark oC
Brinell HB Rocknell HB Min Max
Soft Iron 90 56 P -40 540
Low C/S 120 68 S -60 500
SS410 170 86 S410 -40 850
SS304 160 83 S304 -250 540
SS316 160 83 S316 -200 815
SS347 160 83 S347 -200 870
4-6%Cr,0.5% Mo, 130 72 F5 -40 650
Copper 80 - C -100 315
Aluminum 35 - A -200 425
Inconel 600 150 78 Y -100 1095
Inconel 825 150 78 W -100 1095
Monel 400 150 78 M -100 760
Titanium 215 77 T -200 540
Nikel 200 110 58 N -200 760
Hastelloy B2 230 121 X1 -100 1095
Hastelloy C276 210 110 X2 -100 1095

The size of the metal lens gasket limit deviation:

Name of size Generation of no. Limit deviation
Ring pad pitch diameter P + / - 0.18
The width of the ring gasket A + 0.20 - 0
The height of the ring gasket H + 0.20 - 0
Metal lens mat bottom width C + 0.20 - 0
23 o Angle Plus or minus 0.15 o
Radius of ring gasket R + / - 0.4
Metal lens mat all 23 o Angle of the plane, the surface roughness shall be no greater than 0.8 microns

Metal lens gasket main performance parameters:


Coefficient of gasket
m=5.50-6.50
Gasket using pressure <=32MPa
Gasket using temperature - 196 oC to 1000 oC
Than the minimum preload pressure y=126.6-182.8MPa

Metal lens pad technology standards:

Can provide any size of standard and non-standard, including API 6 a, ASME B16.20, DIN 2693-67, JPI - 7-23-72 - s, DIN - 2696-1999 and other standards.

Domestic relevant standards:

JB/T 2777-1992 | PN16.0 ~ 32.0 MPa without aperture lens gasket
JB/T 2776-2010 | valve parts high-pressure lens pad
JB90-1959 type of flange sealing surface lens with metal gasket

Does the actual application condition is complex, the above parameters are for reference only do not make any guarantee is requested.

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