Tuesday, October 28, 2008

Gasket Material

They are a lot of people just thinking gasket is a very simple item that we can just install it without knowing what material are they making off, actually high quality gasket have a diffrence material from those other which it can withstand high temperature and pressure, and for preventing air leak, oil leak or water leak also need to use the correct gasket material, here are some gasket material list for our readers reference.


Material Tensile Strength High Temperature Usefulness °F Relative Cost Rating Within This Material Group

Natural Rubber (Pure Gum) 3000 150 1.05

Description: Soft rubber with high resilience and tear resistance. Good for squeegee blades and seals. Poor oil, ozone, sunlight and heat resistance.

SBR 700 200 0.60

Description: Popular low cost, non oil-resistant rubber.

Neoprene 1500 225 0.70

Description: All-purpose material combines moderate oil, gasoline, sunlight, ozone, chemical and oxidation resistance in one product.

Nitrile (Buna N) 1500 250 1.60

Description: Excellent oil and gasoline resistance.

EPDM (EPR) 1500 300 1.45

Description: Excellent weather, water and ozone resistance. Good heat resistance. Not for use with petroleum products.

Silicone 700 450 4.60

Description: Maximum resistance to heat and cold, oxidation, ozone and weathering. High dielectric strength.

Urethane 6000 250 9.00

Description: Tough resilient material designed for applications requiring maximum abrasion resistance and high tensile strength.

Viton® 1200 400 33.50

Description: Maximum resistance to most oils and many chemicals in high temperature conditions.

White FDA Rubber 1500 200 2.70

Description: Ingredients used in the compound are FDA approved. Non-marking; useful in food handling.

Cloth Inserted Rubber 700 200 1.80

Description: Fabric reinforces the rubber to reduce stretching. Many varieties available. Contact Precision Gasket for details.

Thermoplastic Rubbers 1200 250 3.25

Description: Excellent fatigue and chemical resistance. Some products are impervious to oil. FDA and NSF compounds available.

Blend Neoprene/Cork 200 250 2.40

Description: Gasket Material made from cork particles blended with neoprene rubber to improve compression set, fatigue, sealing properties over rubber.

Blend Nitrile/Cork 200 250 2.50

Description: Similar to neoprene/cork, but better suited to petroleum applications.

Neoprene Blend Sponge 75 225 0.33

Description: Widely used for gaskets, pads, etc., where solid rubber is too hard. Firmer than foam materials.

Natural Rubber Sponge 150 150 0.84

Description: Excellent resistance to compression set. Firmer than foam materials. Absorbs liquid.

Silicone Sponge 100 450 4.85

Description: Closed cell material with maximum resistance to compression set and most environmental conditions. Firmer than foam materials.

White FDA Sponge 100 130 0.90

Description: Closed cell material made from FDA approved ingredients. Used primarily in food applications.

Open Cell Polyurethane Foam 25 225 0.30

Description: Softest cellular material for gasketing, sound control, packaging, etc. Excellent chemical resistance properties. Absorbs liquid, low cost.


Closed Cell Polyurethane Foam (Crosslinked) 50 200 0.15

Description: Soft resilient material has excellent chemical resistant properties.

Composite Cellulose Fiber 2000 250 0.50

Description: Useful for applications with medium flange bolt pressure. Fuel resistance, but affected by acids, water.

Composite Reinforced Cellulose Fiber/Rubber (Beater Saturated) 1500 350 0.50

Description: Rubber binder adds resistance to some chemicals and improved sealability. For applications with medium flange bolt pressure.

Composite Reinforced Aramid Fiber/Rubber (Beater Saturated) 4000 750 1.75

Description: For medium to heavy flange bolting pressure. Variety of rubber binders available. 1/16" thick maximum. Uniform fiber dispersion.

Composite Reinforced Aramid Fiber/Rubber (Compression Saturated) 3500 750 3.00

Description: For heavy flange bolt pressure applications. Contains rubber binder. Thickness from 1/64" to 3/16" available.

Composite Graphite Sheet 750 900 2.00

Description: For applications with very high temperatures.

Wool Felt 250+ 200 0.95

Description: Many thicknesses and densities available. Excellent cushioning, sealing, wicking and environmental properties.

Synthetic Felt - - 1.00

Description: Typical materials include: Polypropylene, rayon, polyester, nylon, Nomex, and Teflon felts.

Polyethylene 5000 250 0.40

Description: Low and high densities available. Excellent solvent resistance.

Nylon 12000 250 2.30

Description: Tough over a wide range of temperatures. Abrasion, heat and chemical resistant. Can be fiberglass or MDS filled.

Polypropylene 5000 250 0.45

Description: Tough, rigid with outstanding flex life. Excellent abrasion and good chemical resistance.

Polyester (Mylar®) 25000 400 1.25

Description: Very strong with good balance of physical, chemical properties. Outstanding dielectric strength for electrical insulation.

Teflon® 2000 500 6.25

Description: Unexcelled chemical resistance; high dielectric strength; non-flammable and inert to weather and sunlight. Lowest coefficient of friction of any solid.

Kapton® 25000 700 3.30

Description: Available from .0003" to .005" thick. This Dupont film has exceptional heat resistance, mechanical strength, and dielectric properties.

Nomex® 1000 400 0.50

Description: Available from .003" to .030" thick. Dupont Aramid paper can be creased and formed and is UL listed.

Vulcanized Fibre (Fishpaper) 21000 250 0.35

Description: Chemically hardened paper with excellent dielectric strength and high friction and oil resistance. Can be formed.

Flame Retardant Papers/Boards 10000 275 0.65

Description: UL 94V-0 Flame retardant rated materials. Rigid with high electrical insulation properties where moisture is not present.

Formex™ Flame Retardant Plastic 3600 200 0.65

Description: Moisture resistant with high dielectric strength. Excellent scoring/folding performance and UL 94V-0 rating.

Epoxy/Glass Laminates 50000 350 2.50

Description: Glass cloth is saturated with epoxy thermosetting resins to create rigid, strong material with excellent dielectric properties. Minimum thickness is .005".

Non-Asbestos Paper 500 750 1.00

Description: White material reflects heat and light. Effective for replacing asbestos paper. Some contain rubber binder to limit moisture absorption.

Fiberglass Insulation N/A 350-1000 0.25

Description: Low cost light weight versatile material. Organic binders burn at 350° F, but glass is unaffected up to 1000° F.

Ceramic Insulation 35 2300 2.05

Description: Unaffected by most chemicals. Thick blanket, compressed board, paper versions available.

Sound Absorbing Foams 20 225 0.50

Description: Absorbs hight frequency sound. Can be adhesive backed.

Specialty Damping Sheet 1000 135 3.10

Description: A dense thermoplastic used to reduce low frequency vibration. Adhesive backing available.

Foam/Damping Sheet Composites 1000 135 1.28

Description: Absorbs both high and low frequency sound and vibration. Adhesive backing available.

Foil Laminates N/A 200 1.30

Description: Aluminum or copper foil laminated to paper or plastic film; strong; formable and uniform. Good for wrap around shielding.

Wire/Rubber Composites N/A 375 15.00

Description: Used for conductive gasketing. Stops both liquid and EMI/RFI radiation from passing between mating flanges. Many types available.

Silver Particle Filled Conductive Rubber 175 375 125.00

Description: Used for conductive gasketing. Has corrosion characteristics of silver.

Rubber Based Adhesives N/A 150 1.15

Description: High initial tack strength. 1 year shelf life maximum.

Acrylic Based Adhesives N/A 250 1.25

Description: Low initial tack strength but high long term bond strength. 2 year shelf life maximum.

Silicone Based Adhesive N/A 450 9.00

Description: Moderate tack strength. Withstands 450° F temperature. 6 month shelf life maximum.

3M Safety Walk® - - -

Description: Adhesive backed, durable antislip material contributes friction to make surfaces safe and efficient. Different textures are available.


2 comments:

Danny Morgan said...

Hi,
I admire the valuable information you offer in your articles. I will bookmark your blog and I am quite sure they will learn lots of new stuff here than anybody else!

Thanks!
High temperature gasket material

Goh san said...

Hi Danny, thanks for browsing through my blog, I'm also in the learning path as myself are dealing in this field, most of the info may be able to find it online in others website, which I only try to compile most of the gasket info into my blog, and for my own future references as well.