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New products
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Lens Ring Joint Gasket
If you are willing to import customized and good quality high lumen Lens Ring Joint Gasket from a such manufacturer and supplier, or you are going to check CREE, EMC, CE and OEM Lens Ring Joint Gasket price and quotation with a such exporter, providing with Lens Ring Joint Gasket enquiry, welcome to contact us.
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Double Jacket Gasket
If you are willing to import customized and good quality high lumen Double Jacket Gasket from a such manufacturer and supplier, or you are going to check CREE, EMC, CE and OEM Double Jacket Gasket price and quotation with a such exporter, providing with Double Jacket Gasket enquiry, welcome to contact us.
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Corrugated Gaskets
If you are willing to import customized and good quality high lumen Corrugated Gaskets from a such manufacturer and supplier, or you are going to check CREE, EMC, CE and OEM Corrugated Gaskets price and quotation with a such exporter, providing with Corrugated Gaskets enquiry, welcome to contact us.
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PTFE Envelope Gasket
If you are willing to import customized and good quality high lumen PTFE Envelope Gasket from a such manufacturer and supplier, or you are going to check CREE, EMC, CE and OEM PTFE Envelope Gasket price and quotation with a such exporter, providing with PTFE Envelope Gasket enquiry, welcome to contact us.
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Rubber Sheet
If you are willing to import customized and good quality high lumen Rubber Sheet from a such manufacturer and supplier, or you are going to check CREE, EMC, CE and OEM Rubber Sheet price and quotation with a such exporter, providing with Rubber Sheet enquiry, welcome to contact us.
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.
Lens ring
Metal lens gasketHigh 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:
| 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.