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Spiralwound gaskets

Spiralwound gaskets
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Spiralwound gaskets

Product catalog summary
Overview: The document provides a comprehensive analysis of different types of gaskets, focusing on spiral wound, metalplastic, and metallic gaskets. These gaskets are designed for high-performance sealing in challenging conditions where traditional asbestos-free gaskets are not suitable.
Spiral Wound Gaskets: These gaskets consist of a preformed metal strip and an insulating filler material, coiled under constant tension. The spiralization enhances sealing efficiency, while the insulating material prevents fluid leakage. They are adaptable to irregular flange surfaces with low clamping loads and achieve optimal sealing when compressed at a predetermined pressure.
Metalplastic Gaskets: Comprising an asbestos-free insert covered with a metal jacket, these gaskets are highly compressible and withstand high temperatures and pressures. They support compression between 20% and 30% of their original thickness. Corrugated designs improve sealing by creating a labyrinth effect, and they are available in various shapes and sizes.
Metallic Gaskets: Used in applications requiring high compression loads, these gaskets are designed with lower hardness than the flanges and are suitable for high-pressure and high-temperature environments, such as double-casing flanges and valve caps.
Components and Characteristics: The document details various gasket configurations, including those with external and internal centering rings, reinforcement rings, and specific designs for different flange types. Each configuration is tailored to specific applications, such as gate valves, pumps, and heat exchangers, with considerations for operating pressures and temperatures.
Applications: The gaskets are widely used in refining plants, petrochemical industries, and marine applications, providing reliable sealing under severe conditions. They are particularly effective in environments with limited space and low-pressure applications.
Specifications: Gaskets are composed of metal sheets, often corrugated, combined with insulating materials. They are available in various sizes and thicknesses, with materials including non-ferrous metals and forged elements, tailored to specific pressure and temperature requirements.
Characteristics: Features include mechanical resistance, elasticity, and adaptability to different sealing conditions. Profiles vary from circular to octagonal, lenticular, or trapezium shapes, depending on the application's pressure and temperature conditions.
Recommendations: The document suggests selecting gaskets based on specific operational requirements, such as pressure, temperature, and the nature of the sealing surfaces, emphasizing the importance of choosing the right gasket type for adequate sealing and mechanical performance.
Material Specifications: Materials include aluminium, stainless steel, silver, soft steel, and various alloys like Inconel and Hastelloy, each with specific hardness and temperature ranges suitable for different industrial applications.
Technical Information: Materials are listed with their trade names, compositions, and temperature ranges, with temperature limits depending on specific applications and operating pressures.
Product Lines and Brands: Manifattura Italiana Guarnizioni offers a range of products including AF joints, elastomers, fibreboard, and spirometallics, known for quality and used in various industrial applications, including boiler services and fibre tapes.
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Catalog excerpts

Spiralwound gaskets-2

La “Manifattura Colombo”, nel suo continuo rinnovamento, ha voluto preparare uno strumento di consultazione per progettisti ed utilizzatori nella scelta delle guarnizioni: SPIROMETALLICHE, METALLOPLASTICHE, METALLICHE COMPENSATE. Questi tipi di tenuta hanno trovato sempre maggior impiego, nell’ultimo decennio, in quei settori dove gravose condizioni d’esercizio non permettono l’utilizzo di giunture in asbestos-free. metalliche e metalliche compensate Sono composte da un lamierino appositamente sagomato per renderlo elastico, avvolto a spirale concentrica, sotto tensione costante graduata, unitamente...

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Spiralwound gaskets-3

Manifattura Colombo", in order to continue its technological innovation, has made a consultation guide for designers and customers for the right choice of: SPIRALWOUND GASKETS, METALPLASTIC GASKETS, METALLIC. These seal-types, during last ten years, have been used in applications where hard working conditions do not permit the using of absestos-free gaskets. They are composed of a shaped strip, which give them elasticity; the coiled, metal strip, under a constant and graduated tension, has got an insulating material nterposed. The “superflex" obtain very good sealing results, due to their components:...

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Spiralwound gaskets-4

spiralwound gaskets COMPONENTI: Lamierino metallico preformato e nastro coibente; CARATTERISTICHE: Lamierino metallico avvolto a spirale con interposizione di coibente saldato a punti vincolati da specifica costruttiva; IMPIEGHI: usate per seracinesche, valvole, pompe, su flange ad incameratura semplice o doppia. COMPONENTS: Preformed metal strip with insulation layer; CHARACTERISTICS: Coiled metal strip with insulating material interposed; the whole spot welded to manufacturing specification; USES: used for gate valves, valves, pumps, on flanges with simple or double casing. COMPONENTI: Lamierino...

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Spiralwound gaskets-5

spiralwound gaskets COMPONENTI: Lamierino metallico avvolto a spirale con interposizione di coibente con aggiunta di un anello esterno solo metallo; CARATTERISTICHE: Ove sia necessario un rinforzo esterno avendo una scarsa disponibilità d’ ingombro; IMPIEGHI: Su flange piane, in genere, condizionate da limitati piani o tenuta a basse pressioni. COMPONENTS: Preformed metal strip with insulation layer with the addition of 1 purely metal external strip; CHARACTERISTICS: Where external reinforcement is necessary in limited spaces; USES: On flat flanges with limited surface or in low pressure applications....

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Spiralwound gaskets-6

metalplastic gaskets COMPONENTI: Lamierino metallico ondulato con imbottitura di filotto coibente avente caratteristiche adeguate all’impiego; CARATTERISTICHE: Lo spessore e la fascia della guarnizione sono rapportate allo spazio disponibile ed alle condizioni d’esercizio; IMPIEGHI: È consigliata con basse pressioni e ove vi sia scarsa possibilità di serraggio; sconsigliata in presenza di liquidi, olii e sottovuoto. COMPONENTS: Corrugated metal sheet padded with insulating stuffing, with appropriate usage characteristics; CHARACTERISTICS: The thickness and the face of the seal are related to...

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Spiralwound gaskets-7

metalplastic gaskets COMPONENTI: Due lamierini facenti funzione guarnizione di scatola e foderina e un lamierino piano all’interno, con funzione di rinforzo, inserito tra due strati di coibente; CARATTERISTICHE: Realizzate in ogni dimensione con fasce minime di 8 mm. ed in aumento proporzionale alle necessità senza limitazioni; realizzate con metalli non ferrosi che richiedono un rinforzo interno per mantenere la planarità della guarnizione stessa; IMPIEGHI: In tutte le applicazioni ove le giunture normali non siano più sufficienti a garantire una tenuta adeguata. COMPONENTS: Two metal sheets,...

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Spiralwound gaskets-8

metalliche pesanti heavy metal ME 29 COMPONENTI: Metallo in lastra o piatto; CARATTERISTICHE: A sagomatura circolare tipica secondo l’applicazione; IMPIEGHI: Tenute ove vi sia una pressione interna relativamente alta. COMPONENTI: Metallo in lastra o filo a sezione torica; CARATTERISTICHE: A sagomatura circolare, adatta a sedi semisferiche elastiche o plastiche a seconda dei materiali impiegati; IMPIEGHI: Tenute con limitate possibilità di piani a medio-alte pressioni; per tenute al vuoto, al gas elastiche e a seconda dei materiali impiegati. COMPONENTS: Sheet metal or wire with toric section;...

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Spiralwound gaskets-9

COMPONENTI: Elementi forgiati o tondi; CARATTERISTICHE: Sagomate a trapezio; IMPIEGHI: Particolari tenute a richiesta. COMPONENTS: Forged or ray elements; CHARACTERISTICS: Trapezium profile; USES: Special seals on request. COMPONENTI: Metallo in lastra o tondo; CARATTERISTICHE: Sagomato unidente; IMPIEGHI: Particolari con piccole dimensioni ad alta pressione; COMPONENTS: Sheet or ray; CHARACTERISTICS: Single tooth profile; USES: Particularly with small dimensions at high pressure. COMPONENTI: Metallo in lastra o tondo; CARATTERISTICHE: Guarnizione sagomata a disegno; IMPIEGHI: Anelli realizzati...

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Spiralwound gaskets-10

metalliche per protezione di flange ME 65 COMPONENTI e CARATTERISTICHE: Lamierino metallico (in genere alluminio) ricavato a mezzo stampaggio o tornitura; IMPIEGHI: Protezioni di sicurezza all’usura ed al logorio di flange pesanti per RJ. COMPONENTS and CHARACTERISTICS: metal sheet (generally aluminium) formed by pressing or turning; USES: safety protection against wear of heavy RJ flanges. COMPONENTI e CARATTERISTICHE: Lamierino metallico (in genere alluminio) ricavato a mezzo stampaggio o tornitura; IMPIEGHI: protezioni di sicurezza all’usura ed al logorio di flange pesanti per RJ. COMPONENTS...

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technical informations of the materials DENOMINAZIONE COMMERCIALE P.S. UNI DIN ASTM UNS BS AFNOR DUREZZA HB TEMPERATURE °C TRADE NAME gr/cm3 HARDNESS HB TEMPERATURES °C ACCIAIO DOLCE - SOFT STEEL_7,85 ACCIAIO INOX 304 - STAINLESS STEEL 304 7,9 ACCIAIO INOX 304L - STAINLESS STEEL 304L 7,9 ACCIAIO INOX 316 - STAINLESS STEEL 316 7,9 ACCIAIO INOX 316L - STAINLESS STEEL 316L 7,9 ACCIAIO INOX 316T - STAINLESS STEEL 316T 7,8 ACCIAIO INOX 310 - STAINLESS STEEL 310 7,9 ACCIAIO INOX 321 - STAINLESS STEEL 321 7,9 ACCIAIO INOX 347 - STAINLESS STEEL 347 7,9 ACCIAIO INOX 410 - STAINLESS STEEL 410 7,9 ACCIAIO...

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