Metal wrapped gasket/high-temperature flange sealing graphite gasket

NegotiableUpdate on 04/30

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

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Overview

The metal wound gasket (basic type) is made of high-quality SUS304, SUS316 (V-shaped or W-shaped) metal strips and other alloy materials overlapped and spiral wound with soft materials such as graphite, asbestos, polytetrafluoroethylene, and asbestos free. The metal strips are fixed at the beginning and end by spot welding.

Product Details

Metal wrapped gasket/high-temperature flange sealing graphite gasket
Basic information: Characteristics of a semi metallic flat gasket made by spiral composite winding of metal and non-metal strips

1. The applicable operating range is wide. Capable of withstanding high temperatures, high pressures, and adapting to usage conditions under ultra-low temperatures or vacuum. By changing the material combination of the gasket, the chemical corrosion problem of various media on the gasket can be solved.

2. Strong stress compensation capability. At workstations with frequent temperature and pressure fluctuations, the sealing performance is stable and reliable.

3. Excellent sealing performance.

4. The surface accuracy requirement for flange sealing in contact with gaskets is not high.

5. Easy installation, low pre tightening pressure of gasket Metal wrapped gasket/high-temperature flange sealing graphite gasketType, structure, form, and code:

fundamental type	code name	Applicable flange sealing surface
Basic model	A	Tenon groove surface
Inner ring type	B	concave-convex surface
Equipped with a central ring type	C	Flat or protruding surface
With inner and middle rings	D	Flat or protruding materials

1. Metal strip

A. Cold rolled steel strips such as 08F0Cr13,0Cr18Ni19Ti, 0Cr18Ni9Ti, 00Cr18Ni10, 0Cr18Ni12Mo2Ti, 00Cr17Ni14Mo2 with a thickness of 0.15mm~0.25mm shall be used, or determined through negotiation between the supply and demand parties.

B. The metal strip should be a pre formed V-shaped or W-shaped narrow strip with a smooth surface Clean, there should be no roughness or unevenness crackle. Scratches Defects such as dents and rust spots

C. The hardness value of stainless steel HV ≤ 200

2. Non metallic strip

A non-metallic filling includes specially made asbestos tape, flexible graphite tape, polytetrafluoroethylene tape, non asbestos fiber tape, and mica tape. The thickness of the tape is 0.3-1.0mm.

B. The burning loss of special asbestos must be ≤ 25%

C. The chloride ion content of non-metallic strips is ≤ 100PPM

D. Recommended operating temperatures and pressures for various media and non-metallic tapes

medium material	asbestos	graphite	non-asbestos	Polytetrafluoroethylene
Water based medium	600℃，CL 2500	550℃，CL 1500	350℃，CL 1500	-200-260℃， CL 1500
Oil medium	500℃，CL 1500	550℃，CL 600	350℃，CL 600	-200-260℃， CL 600
gas medium	400℃，CL 600	550℃，CL 400	350℃，CL 400	200-260℃， CL 400

Note: Graphite can be used up to 800 ℃ in non oxidizing media.

material	Temperature °C	Zui Da Gong Make pressure	Applicable Medium	compression ratio %	Rebound rate%	Stress relaxation rate%
expanded graphite	-220--550	250 BAR	corrosive medium	18--30	≥17	≤18
Specially made asbestos tape	-200---600			18--30	≥19	≤28
Polytetrafluoroethylene	-200-- 250	100 BAR	corrosive medium	18--30	≥15	≤13
Asbestos free material	-100--250	100 BAR	General airtightness	18--30	≥19	≤28
Mica	-150--800	100 BAR	Ultra high temperature	18--30

3. Unless otherwise agreed, the material of the inner reinforcing ring should be the same as that of the metal strip, and the material of the outer reinforcing ring should be A3 steel with rust prevention treatment.

Special material wrapped gasket

Special stainless steel or alloy materials such as 321, duplex steel, Monel, Inconel, Hastelloy, titanium, etc. are used as wound steel strips, inner and outer rings, and non-metallic materials such as high-purity nuclear grade graphite, expanded PTFE, and asbestos free wound gaskets. They are used for flange sealing under various special working conditions such as high bottom temperature resistance, strong internal corrosion, and strong radiation.

Performance characteristics: Can withstand various ultra-high temperatures Maintain excellent sealing performance under harsh conditions such as low-temperature cyclic alternation, strong corrosion, and strong radiationHebei sealing gasket metal winding gasket priceOperating temperature

Graphite metal wrapped gasket operating temperature -200-850 ℃

Asbestos metal wrapped gasket operating temperature -200-500 ℃

PTFE metal wrapped gasket operating temperature -200-260 ℃