HZDT Sealing; Gasket Material

GH-160 Pure Graphite Rolls/Sheets (NA)

Construction: Graphite sheet is made from exfoliated graphite flake which is compressed into foil by a carefully controlled calendering process. In this process, the expanded flake particles are mechanically locked together without the use of fibers, binders or other additives. Sheets of foil are then laminated to the required thickness.

Application: The sheet has pressure-temperature sealability capabilities that are far superior to all asbestos reinforced and non-asbestos reinforced sheet products. It is resistant to chemical attack by virtually all organic and inorganic fluids with the exception of concentrated, highly oxidizing acids.

Gaskets cut from flexible graphite sheet seal with low to moderate bolt loads and because of very low creep relaxation, re-torquing is rarely required. Flexible graphite conforms to irregular flange sealing surfaces and readily flows into flange irregularities enabling it to seal both smooth and coarse surface finishes.

Technical Data

Item		Unit	Value
Temperature	Minimum	°C	-200
Temperature	Maximum	°C	450 (In Air) 650 (In Steam) 3000 (In Inert Media)
Pressure		Bar	150
Physical Properties	Compressibility	%	＞40
	Recovery	%	＞15
	Creep Relaxation	%	5
	Tensile Strength	Mpa	＞4.5
	Compressive Strength	Mpa	＞150
	Density	g/cm³	1.0±0.05
Chemical Composition	Carbon Content	%	＞99
	Total Sulfur	ppm	＜1500
	Leachable Chlorine	ppm	＜50
Available Sheet Sizes	Thickness	mm	0.2~3.0
Available Sheet Sizes	Width	mm	1000 or 1500
*Thickness from 0.2 to 1.0mm is also available in rolls.

GH-190 Reinforced Graphite Sheets

Construction: This sheet is pure graphite sheet reinforced with a stainless steel (316 or 304) sheet or net in the center.

Application: This sheet is suitable for making gaskets of cylinders for air compressors, internal combustion engines and packings for different kinds of pipe, and flanges.

Specification

Style	Reinforced Material	Reinforced Method
190S	SS 316/304 sheets	Sticking
190T	SS 316/304 sheets	Mechanically pressing
190W	SS 316/304 wires	Sticking

Technical Data

Item		Unit	Value
Temperature	Minimum	°C	-200
Temperature	Maximum	°C	450 (In Air) 650 (In Steam) 3000 (In Inert Media)
Pressure		Bar	250
Physical Properties	Compressibility	%	＞30
	Recovery	%	＞15
	Creep Relaxation	%	10
	Tensile Strength	Mpa	＞4.5
	Compressive Strength	Mpa	＞150
	Density	g/cm³	1.0±0.05
Chemical Composition	Carbon Content	%	＞99
	Total Sulfur	ppm	＜1500
	Leachable Chlorine	ppm	＜50
Available Sheet Sizes	Thickness	mm	1.0, 1.5, 2.0, 3.0
Available Sheet Sizes	Width	mm	1000 or 1500

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