Over 250 stock molded sizes in various shapes are available:

	Elliptical		Obround
	Round		Special Shapes
	Sheet Material		Bolt Gaskets
	Gauge Glass Gaskets		Custom Shapes and Sizes
	McDonnell Miller

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Material Specification Sheet: Topog-E Molded Gaskets & Sheet Material

Material Description: Special, proprietary rubber composition, Black, 80-85 Durometer

When used on steam pressure vessels, Topog-E Gaskets are typically used at operating pressures of up to 180 psi (12.4 bar) and 380*F. (193*C.) for an average service life of one year under these severe conditions. When used in other applications (e.g. condensate, water, and air vessels), Topog-E Gaskets are sometimes used at pressures above 200 psi (14 bar) where temperatures are typically more moderate (e.g. below 250*F./121*C). When operating under less severe conditions (e.g. water applications at ambient temperatures) Topog-E Gaskets can provide very long service lives.

Topog-E Gaskets have been used successfully around the world for over thirty years. In general, any type of industrial pressure vessel or tank that has inspection openings is a potential application where Topog-E Gaskets can be used as a cost effective sealing device. In addition to using them in steam pressure vessels, customers also use Topog-E Molded Gaskets and Sheet Material with great success in many other applications, including: water softeners, hot water heaters, steam humidifiers and cookers, water purifiers and demineralizers, refigeration units, liquid treatment vessels, carbon absorption and filtering vessels, dryer cans in paper mills, water hydrants, various types of mixing tanks, compressed air tanks, various types of dryers, air starters and receivers, hatch covers on railroad tank cars and river barges, water towers and columns, PVC reactor vessels, and in applications where excellent low-temperature sealing properties are required.

Topog-E Gaskets are specifically formulated to have excellent resistance to steam and hot and cold water. They also have good resistance to alcohols, ketones, phosphate esters, silicone oils and greases, dilute acids, bases, salts, glycols, ammonia, selected refigerants, and animal and vegetable fats. Water treatment chemicals, when used in accordance with supplier's guidelines, should not have a significant effect on the service life of properly installed Topog-E Gaskets. In general, Topog-E Gaskets do not perform satisfactorily in applications where they see direct exposure to high concentrations of aromatic hydrocarbons, chlorinated solvents, or petroleum based oils, fuels, and lubricants.

Topog-E Gasket Company, which formulates and mixes its won rubber, invests heavily in research and development efforts to insure that Topog-E Gaskets live up to their worldwide reputation for quality, durability, and ease of use. Topog-E Gaskets are tested in-house at steam pressures and temperatures far exceeding the 180 psi and 380* F. levels below which most Topog-E Gaskets are used in steam applications. Carefully installed and monitored Topog-E Gaskets are routinely subjected for extended periods of time to steam pressures and temperatures of up to 360 psi and 438* F.

Because there are many application specific factors that can affect service life, it is always advisable to first test Topog-E Gaskets in a particular application to determine their ultimate suitability. Please contact us if you have questions regarding a specific application. If you have never used Topog-E Gaskets, we would be happy to provide you with a sample gasket for your evaluation.