Material:spairal wound gasket is formed of v-shaped of w-shape stainless steel stripe and soft nonmetallic packing or the material of flexible graphite asbestos, nonasbestos, ptfe etc by means of piled.The(inner/outer) ring:carbo steel, ss304, ss316, moneluse temperature:-200-870ípc use pressure:30mpaapplication range:the static sealing element of pipe, valve, pump, thermal exchange, condensing motorcycle, auto vent-pipe, tower, plain hole and hole of flange, etcsupplying specification:dn10-300-0mm
1. Structure
The wound style gasket consists of "v-shape"(or"w-shape")metal tape and nonmetal tape, which are overlapped each other and wound continuously.To fasten the metal tape, both its start point and end point are tack welded.
2.Performance and features
1. Wide range of applicable working condition, high temperature and high pressure resistance, applicable to super low temperature and vacuum condition.Chemical resistant gasket is available under various medium, through change of composition of gasket.
2.Strong stress compensation, stable and reliable sealing performance even under frequent pressure fluctuation condition.
3.Perfect sealing performance.
4.Normal requirement of flange surface finishing which contact with gasket.
5.Easy installation and low pre-tightening stress of gasket.
3.Kinds of gasket
1.A.Wound style gasket consists of four type:basic type, with inner ring, with outer ring, and with inner and outer rings. B.Heat exchanger wound style gasket:basic type and with inner and outer rings.
2. Normally matrial used:
A.Steel tape:08f, 0cr18ni9(304), 0cr18ni9ti, 1cr18ni9ti(321), 0cr17ni12, m02(316), 00cr17ni14m02(316l).
B.(cold roll)steel plate for inner and outer ring:outer ring:mild steel, 0cr13 and 0cr18ni9
Inner ring:same as steel tape, special order is a available through negotiation.
C.Nonmetal tape:flexible graphite, special made asbestos, teflon and non-asbestos paper.
4.Scope of application
1. Working temperature:-196íµ -700íµ(not higher than 600íµ in oxidic medium)
2.Working pressure:ín25mpa
3.Gasket coefficient:m=2.5-4
4.Min.Pre-tightening specific pressure:y-68mpa
5.Max.Machinable size:-2800mm
Die formed graphite packing ring is made of pure flexible graphite , or graphite with nikle/ss316/brass wire reinforced. Performance and features
Perfect self lubricant performance.
High elasticity coefficiency.
Scope of application
Working temperature:~200~400íµ(200~800íµ under non-oxidation atmosphere)
Working pressure:ín35mpa
Density:1.4 ~ 1.6 g/cm3
Max.Machinable size:5~850mm
Spiral wound gasket is the best in the compression resilient in all the half-metal seal gasket, which is made by the metal hoop band and different kinds of packing material. We can make its structure density according to the demand of different locking force, and we use the inner and outer circle to control the maximum compact degree. So it can be well suit the rough flange face, especially suit the situation of unbalance load, loose of joint force, temperature and pressure change periodically , concussion and shock. It is used in flange joint of valve, pump, heat exchanger, tank, and handhole. It is widely used in the fields like petrochemical industry, machine, electric power, metallurgy, ship-building, medicine, atomic energe, space navigation. We made spiral wound gasket conform to different standards, for example, asmi, bs, jis, din and several other criterion used in china.
Spiral wound gasket is the ideal gasket in the semi-metallic category. A narrow strip of v-shap metal hoop is spirally wound under tension with a filler cushion between the lami nation of the metal and is spot-welded at both ends.
This unique construction of a spring-like metal and soft filler provides gasket excel-lent characteristics.
Resistance to high temperature and high pressures.
Great resilience which allows the gasket to adjust automatically to change in operating conditions, such as pressure and thermal shocks, vibrations etc.
Excellent sealability is maintained with comparatively small gasket area.
Good tolerance for flange surface finish irregularities.
Can be designed to any dimensions economically in circular or moderately noncircular shape.
Available in a variety of hoop metals and filler materials to satisfy specific operating conditions.
Graphite gaskets are cut from pure graphite sheet or graphite sheet with metal reinforcement, features excellent corrosion-resistance, high-and-low temperature resistance, good compression resilient and high internsity it can be used as sealing elements of pipe, valve, pump, pressure vessel, heat exchanger and condenser, etc. Other complex gaskets such as water gauge gasket and flange gasket with bolt holes are available. Wrapped with metallic stripe in the inner and outer circle borderline. Keep the former excellent performances. Can be installed and disassembled conveniently without damage.
Thickness : 1.5mm, 2.0mm, 3.0mm, 4.5mm
Application: flanges, valve bonnets, heat exchangers, level indicatiors etc.
Typical service fluids : high temperature & pressure steam, hot water, gases, heat midium, hydrocarbon, organic so;vents, acids, alkalis(ph0-14), lpg, lng, liquefied oxgen, nitrogen and hydrogen etc.
Thickness : 1.5mm, 2.0mm, 3.0mm, 4.5mm
Application: flanges, valve bonnets, heat exchangers, level indicatiors etc.
Typical service fluids : high temperature & pressure steam, hot water, gases, heat midium, hydrocarbon, organic so;vents, acids, alkalis(ph0-14), lpg, lng, liquefied oxgen, nitrogen and hydrogen etc.
Ring joint metallic gasket
Metal ring gasket is by smithing, heat treatment and mechanical processing. It is suitable for oil or gas pipe flange, pressure vessel, high speed joint face, valve with high temperature and high pressure. It has good sealing performance even when the pressure and temperature is not stable.The typical style r are divided into ellipse style and octagonal style according to its cross section. The standard style r gasket is made conform to the api 6a & asme b16, 20 standard, can bear 10000psi pressure at most. The octagonal style and ellipse style can be interchanged in flange with trapezum groove. Style rx is an improvement of style r in pressure resistant. It is a standard ring gasket suitable for all the flange sealing which is suitable for style r. Style by is another item with a high pressure resistant up to 15000psi. We have some different material and style which can correspond to different design and operation demand please see the following table for the reference of material characteristic.
