Hollow Metallic O-ring is only gasket made of metal tube which is formed and special welded into a round or other shapes. The gasket is provided with various advantages and it can be sealed with low tightening power, can be formed into various shape according to the shape of matrix face and can be used for high pressure, high temperature and ultra-vacuum services. It is the most suitable gasket for seating such machinery and equipment¡¯s that space factor and compactness are accounted much for design. Special surface plating and coating is available according to need.

Hollow Metallic o-ring of can be used materials and temperature surface treatment.

Material	Maximum Temp. (DEG C)	Surface Treatment	Type of fluid	Service temp. (DEG C)
AISI 304(SUS 304) AISI 316L(SUS 316L) AISI 321(SUS 321) AISI 347(SUS 347)	450 600 870 870	P.T.F.E Coating	General gases, Volatile liquid, Chemical liquid.	-250 ~ 260
		Silver plating Copper plating	Ditto Silver and copper plating Resistance of Chemical liquid	-250 ~ 800
				-250 ~ 870
Monel Inconel 800 Inconel x-750	800 1100 1100	P.T.F.E Coating Silver plating Copper plating Nickel plating	General gases, Volatile liquid, Chemical liquid Silver, copper and Nickel plating resistance Of chemical liquid	-250 ~ 260