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Flexible Graphite Sheet
Lamons LG-SS & LG-TC are two proven metal reinforced laminate materials ideal for 95% of all sheet gasket applications. Lamons Flexible Graphite laminates are surface identified, and at a glance you can be certain the gaskets are of the original quality that Lamons provides. These two gasket materials meet refinery, petrochemical, and industrial service requirements. They are excellent in high temperature applications, and have good creep and blowout resistance. LG-SS & LG-TC are chemically compatible with a wide range of fluids and gases.
- LG-TC laminate with 316/316L stainless steel insert (.004”/.005” thick). Made from Standard Industrial Grade sheet of 98% typical carbon content, less than 50 ppm typical leachable chloride content, and with 550ppm typical sulfur content mechanically bonded to a tanged metal insert. Non-fibrous and non-asbestos.
- LG-SS laminate with flat 316/316L stainless steel insert (.002” thick). Made from Standard Industrial Grade sheet of 98% typical carbon content, less than 50 ppm typical leachable chloride content. “Micro-thin” adhesive bond. Non-fibrous and non-asbestos.
Non-Asbestos Sheeting
As part of Lamons strategy to offer customers a wider range of products, we are pleased to announce the launch of our non-asbestos sheet materials. These high quality non-asbestos sheets are branded with the “Lamons” name, one of the leading manufacturers and distributors of gaskets & studbolts in North America.
The initial grade available is L-441, a synthetic fiber based sheet with a nitrile binder. The blue sheet has excellent sealability & chemical resistance and is ideal for general-purpose applications. Please see attached data sheet and sample for further technical evaluation.
Available in stock the 1/16” & 1/8” sheets are 60”*60”, although we can also offer other thicknesses and larger sheets upon request.
Lamons will also soon be offering other grades of non-asbestos sheet. The full range will include:
- L-424 An economically priced flexible compressed sheet with a nitrile binder. Good for low-pressure steam, water & gas.
- L-430 A synthetic fiber sheet with a nitrile binder, which has excellent sealability & good chemical resistance.
- L-441 A synthetic fiber sheet with a nitrile binder, with excellent sealability & chemical resistance.
- L-443 A fiberglass & aramid sheet with a nitrile binder. Excellent for steam and has excellent chemical resistance.
- L-450 Carbon fiber sheet with a nitrile binder, which is excellent for high temperature or high-pressure applications.
- L-640W A synthetic fiber sheet with SBR binder. Good for steam & has good anti-stick properties.
PTFE Joint Sealant
Lamons specially processed 100% pure PTFE sealant provides soft, highly compressible gasketing on a roll for long- life, trouble-free sealing that cuts maintenance and storing costs. The high compressibility of PTFE sealant enables it to effectively fill flange imperfections for a tight, leak-free seal. Under pressure, PTFE sealant provides a very thin and wide ribbon-like joint sealant so that the smallest possible gasket surface area is exposed to the harmful effects of corrosive media. Unlike conventional PTFE, which is prone to cold flow, PTFE sealant has good creep resistance and bolt torque retention properties. You can bolt up once and not have to retorque later.
Natural Rubber
Natural rubber has good resistance to mild acids and alkalies, salts and chlorine solutions. It has poor resistance to oils and solvents and is not recommended for use with ozone. Its temperature range is very limited and is suitable only for use from -70º to 200º F.
SBR (Styrene-Butadiene)
SBR is a synthetic rubber that has excellent abrasion resistance and has good resistance to weak organic acids, alcohol's, moderate chemicals and ketones, It is not good in ozone, strong acids, fats, oils, greases and most hydrocarbons. Its temperature limitations are approximately -65º to 250º F.
CR (Chloroprene)(Neoprene)
Chloroprene is a synthetic rubber that is suitable for use against moderate acids, alkalies and salt solutions. It has good resistance to commercial oils and fuels. It is very poor against strong oxidizing acids, aromatic and chlorinated hydrocarbons, Its temperature range would be from approximately -60º to 250º F.
Buna-N Rubber (Nitrile, NBR)
Buna-N is a synthetic rubber that has good resistance to oils and solvents, aromatic and aliphatic hydrocarbons, petroleum oils and gasoline's over a wide range of temperature. It also has good resistance to caustics and salts but only fair acid resistance. It is poor in strong oxidizing agents, chlorinated hydrocarbons, ketones and esters. It is suitable over a temperature range of approximately -60º to 250º F.
Fluorocarbon (Viton)
Fluorocarbon elastomer has good resistance to oils, fuel, chlorinated solvents, aliphatic and aromatic hydrocarbons and strong acids. it is not suitable for use against amines, esters, ketones or steam. Its normal temperature range would be between -15º and 450º F.
Hypalon (Chlorosulfonated Polyethylene)
This material has good acid, alkali and salt resistance. It resists weathering, sunlight, ozone, oils and commercial fuels such as diesel and kerosene. It is not good in aromatics or chlorinated hydrocarbons and has poor resistance against chromic acid and nitric acid, Its normal temperature range would be between -50º and 275º F.
Silicones
Silicone rubbers have good resistance to hot air, They are unaffected by sunlight and ozone. They are not, however, suitable for use against steam, aliphatic and aromatic hydrocarbons. The temperature range would be between -65º to 500º F.
EPDM (Ethylene Propylene-Diene Monomer)
This synthetic material has good resistance to strong acids, alkalies, salts and chlorine solutions. It is not suitable for use in oils, solvents or aromatic hydrocarbons. Its temperature range would be between -70º and 350º F.
Grafoil®
This is an all graphite material containing no resins or inorganic fillers. It is available with or without a metal insertion, and in adhesive-back tape form for pipe gaskets over 24 inches in diameter. Grafoil has outstanding resistance to corrosion against a wide variety of acids, alkalies and salt solutions, organic compounds, and heat transfer fluids, even at high temperatures. Its use against strong oxidizing agents at elevated temperatures should be investigated very carefully. In addition to being used as a gasket, Grafoil makes an excellent packing material and is also used as a filler material in spiral-wound gaskets. welded.
Ceramic Fiber
Ceramic fiber is available in sheet or blanket form and makes an excellent gasket material for hot air duct work with low pressures and light flanges. It is satisfactory for service up to approximately 2000º F. Ceramic material is also used as a filler material in spiral-wound gaskets.
Plastics
Of all plastics, PTFE (polytetrafluoroethylene) has emerged as the most common plastic gasket material. PTFE's outstanding properties include resistance to temperature extremes from -140º degrees to 450º F (for virgin material). PTFE is highly resistant to chemicals, solvents, caustics and acids except free fluorine and alkali metals. It has a very low surface energy and does not adhere to the flanges. PTFE gaskets can be supplied in a variety of forms either as virgin material or reprocessed material and also with a variety of filler material such as glass, carbon, molybdenum disulfite, etc. The principal advantage in adding fillers to PTFE is to inhibit cold flow or creep relaxation.
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