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About Gaskets and Gasket Manufacturers Including: EPDM Gaskets, Exhaust Gaskets, Gasket Materials, Head Gaskets, High Temperature Gaskets, Jacketed Gaskets, Neoprene Gaskets, Rubber Gaskets, Silicone Gaskets, Spiral Wound Gaskets, Teflon Gaskets & Viton Gaskets.
Gaskets are used to create a tight seal between two parts which prevents gases or fluids from leaking. A proper seal will prevent leakage during temperature or pressure changes. Some gaskets are made to withstand electromagnetic and radio frequency interference (EMI and RFI); these are EMI gaskets, which are made from special EMI-blocking materials (such as nickel). Gaskets must be more pliable than the two adjoining surfaces in order for gaskets to work properly; this allows them to mold to the groves of both components, creating a seal. For this reason, most gaskets materials are either synthetic or natural rubbers; rubber gaskets may include viton gaskets, EPDM gaskets, neoprene gaskets, silicone gaskets and a number of other rubber materials. Additionally, gaskets must be chemically compatible with the two joining surfaces. This ensures a tight seal with no fluid or gas leaks. While most gaskets used in low to mid demand applications are die cut rubber, spiral wound gaskets, metal jacketed gaskets and coated teflon gaskets are used as high temperature gaskets or chemically resistant gaskets in high demand applications. Additionally, gaskets can be designed for specific applications, such as exhaust gaskets in the automotive industry.
Gaskets of various materials, sizes and configurations are used for sealing applications across the aerospace, automotive, aviation, electronics, military and transportation industries. Some applications include air frames, appliances, business machines, compressors, elevators, escalators, medical equipment, meters, turbines and valves. Seals between joints are critical in many hydraulic, pneumatic and aerospace applications responsible for maintaining air or fluid pressure; in a commercial flight, gaskets throughout the aircraft keep the cabin from depressurizing. For especially high demand applications, particularly where high levels of pressure are applied to the seal, metal jacketed gaskets optimize temperature and chemical performance. These gaskets combine the temperature resistance of a metal jacket with the sealing performance of a soft filler. Single jacket gaskets are the most basic type, while double jackets gaskets are available for extra rigid applications, and french style jacket gaskets with two- or three-piece construction have irregular shapes.
Most rubber gaskets are die cut from flat rubber or metal sheets. Die cutting allows gasket manufacturers significant design flexibility, and gaskets are cut in shapes as simple as basic rings or as complex as head gaskets automotive engine blocks. For applications which require simple gaskets with thick, structurally sound construction, rubber molding is used as an alternative to die cutting. Gasket manufacturers use a wide number of both natural and synthetic rubbers to manufacture gaskets with application-specific tolerances. Common elastomeric materials include silicone, neoprene, nitrile, EPDM and Viton. Plastics commonly used for either gasket material or for jacketing include Teflon, nylon, polyethylene (PE), polyurethane and mylar. Sponge rubber, such as open or closed cell silicone, is also used for applications requiring a more flexible seal. Gaskets may be made out of non-asbestos sheets, such as carbon filament, fiberglass, ceramic and Kevlar. Metal gaskets and shims, which are flat metal gaskets similar to washers, are used alone or in combination with rubber gaskets to fill additional gaps that may
occur within flanges, similarly to the way metal jacketed gaskets are
used to create extra seal strength and corrosion resistance.
Gaskets are molded, die cut and roll formed into configurations to meet every possible sealing application, and there are few ways to substitute the efficiency and function of a gasket seal. O-rings are specific types of circular molded gaskets which are used in simple, primarily static sealing applications; while o-rings can provide an exceptionally strong seal around simple ring flanges, they cannot provide the kind effective seal in non-circular or complex flanges that die cut and molded gaskets are capable of providing. Soft non-polymer materials, are sometimes die cut into gaskets to create a breathable seal; these materials include cork sheet, felt, vegetable fiber, vulcanized hard fiber, chipboard and fishpaper.
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Gaskets and Gasket
Manufacturers Images Provided by Reliant
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Gaskets Types
- Also referred to as "back-up rings," they
are rings designed to fit behind rubber o-ring seals in order to prevent
extrusion into the gap between the metal pieces.
- A lightweight metal that resists corrosion and
is used in aerospace materials, springs and gaskets.
- The internal forces that exert pressure against
a gasket, which may cause the unsealing of the gasketed joint.
- Flat steel washers in the center of which a rubber
sealing ring is molded to fit over a bolt, providing a seal.
- Cutting
shapes out of material using a die. The die is a pre-formed stencil.
- An interruption produced
by an electric current, which can be filtered out by some gaskets.
- The total force that creates a seal through compression
of the gasket.
- The
internal forces working against the flanges holding the gasket in place.
- The unevenness of
a seal due to differences in the two adjoining surfaces.
- A specialized gasket material that is used in electrical
transformers.
- A rubber used in weather resistant products, adhesives,
paints, rocket fuel and gaskets.
- A back-up ring that is used as an anti-extrusion ring
for an o-ring. Parbacks are concave-shaped on one side.
- Circular sealing devices.
- Strips comprised of multiple layers of metal that
are welded together to allow gaskets to be used in extreme heat or pressure.
- A type of ring that relieves friction by fitting
over an o-ring.
- Used as spacers between a gasket and the
adjoining material.
- A seal, created by a gasket, between
two unmoving parts.
- Flat, circular rings placed under
the head of a bolt to serve as spacers, gaskets or slip devices.