Applications:
SPETOGRAF gaskets GUS 30 style and GUS 40 style are applied in petrochemical industry and refineries, power and heat generation and in all the installations with exposure to high temperature media. Applied in the construction of the pipelines, valves, vessels and heat exchangers; typical working temperatures -200 ÷ +450°C in customized versions up to +550°C
SPETOGRAF GUS 40 style are gaskets manufactured from the top quality graphite sheet SIGRAFLEX Hochdruck composed of multi-layer laminate from metal foil of 0,05 mm thickness and graphite foil of desinty 1,1 g/cm3 and thickness 0,45 mm bonded together in a proprietary process without any glue. The sheet has very high resistance, the highest of all sealing materials used at present; applied in tongue and groove, male and female, flat and raised face flanges in all dimension standards; also as a gasket in high pressure liquid level gauges. Only nuclear grade graphi-te, impregnated on the surface. SPETOGRAF GUS 40 gaskets have often very small width < 5mm. In flat and ra-ised face flanges SPETOGRAF GUS 41 style is preferred due to increased sealability and resistance to blowout, cor-rosion and chemical degradation of the gasket. Above mention criteria make it a high-quality gasket. SPETOGRAF GUS 43 style for man- , handholes and similar applications. Application of SPETOGRAF GUS 41IZ, GUS 41JZ styles with centring ring allows for optimization of the sealing joint by reduction of the gasket’s sealing area and thus eco-nomical use of the graphite sheet; metal centring part allows for adding the locating lugs which facilitate the instal-lation, e.g. in case of vertical flanges. SPETOGRAF GUS 41I, GUS 41IZ styles with metal core are applied in case of either very high contact stress or at very large diameters to ensure rigidity and protect the gasket from damage; ap-plied at dimension DN>900 and in specific situation, where thicker gaskets are required; in order to increase the recovery and ability to adapt to uneven, wavy flange faces, the metal insert may be also from corrugated steel ring: GUS 41J, GUS 41JZ; in case of both corrugated and flat steel inserts it is possible to manufacture the gasket of va-ried thickness on the circumference for old, non-parallel flanges.
SPETOGRAF GUS 30 gaskets are manufactured from SIGRAFLEX Universal sheet that is from graphite foil of pu-rity >98%C bonded by means of 1.4401 stainless steel insert; the surface of the graphite layer is treated with spe-cial impregnation agent protecting the graphite from water and accidental scratches, increasing its sealability, opti-mized technology of the steel insert protects the flange flaces from damage; gaskets delivered in the following thick-nesses: 1; 1,5; 2; 3mm; styles GUS 31I, GUS 31 J, etc. with a steel insert may have any thickness. SPETOGRAF GUS 31 style is considered to be so called high quality gasket for sealing the installations with flammable and toxic fluids. It has increased sealability and blowout resistance. GUS 32 style is preferred for the gaskets made from seg-ments and joined by the manufacturer, where the outer steel eyelets increase the rigidity of the gasket during the transportation (for DN>900); outer metal eyelet is also applied at temperatures above 400oC to protect graphi-te from oxidation; at temperatures above 550oC the eyelet is manufactured from silver; GUS 32 Z may be also ap-plied in flat flanges GUS 33 is the gasket applied in the inspection man- and handholes. For large diameter gaskets or in case of very high contact stress the styles with the steel insert of custom thickness are applied - GUS 31I, GUS 31IZ These styles are applied in high contact stress joints, where simultaneously the substantial thickness of the ga-sket is required, and in segment product as a rigid, resistant to damage sealing solution (e.g. for large flages accor-ding to MSS SP44, ASME B16.47). SPETOGRAF GUS 31 J, GUS 31 JZ styles have the insert from corrugated ste-el ring, which improves the recovery and conformability; gaskets with centring ring facilitate the optimization of the flange joint by the reduction of the gasket’s sealing area; metal centring part allows for adding the elements adju-sting the gasket which facilitates the installation, e.g. in case of vertical flanges. Gaskets in custom styles can be ma-nufactured without impregnation, e.g. GUS 30 W from SIGRASEAL sheet or with additional anti-adhesive protec-tion from SIGRAFLEX C2A sheet.
Custom styles:
- full face gaskets with bolt holes
- metal eyelets from other materials, e.g. Hastelloy or silver.:
- gaskets with bars and of shapes other than round
- gaskets for plastic flanges
Availabilty:
DIN2690, DIN 2691, DIN 2692, ISO 7483, EN 12560-1, EN 1514-1, ASME 16.21, other
SIGRAFLEX Universal sheets 1500x1500 or 1000x1000 th.. 1,5; 2;3mm
SIGRFLEX C2A sheets1500x1500 or 1000X1000 th. 2;3 mm
SIGRAFLEX Hochdruck sheets 1000x1000 or 1500x1500 th. 1; 1,5; 2;3;4mm
