In industrial terms, a gasket, or an industrial gasket, is a mechanical seal used to bridge the gap between two surfaces. Gaskets are used to create high-pressure seals between parts or surfaces. They put an end to the potential for leaks from or into products or areas. They ensure the smooth and proper functioning of many of the gadgets and equipment we use in our everyday lives.
The purpose of gaskets is to create seals at the point of connection between two pieces of equipment, or two separate stationary components. Gaskets are used where tight pressure is required. They ensure that the environment inside the housing does not come into contact with air, liquid, contaminants, or anything else from the outside environment. In applications in which liquids or gasses are transmitted through pipes, hoses or tubing, gaskets prevent leaking and loss of pressure at connection points.
Gaskets of all shapes, sizes and compositions are used for sealing applications. Some of the industries that make use of gasket manufacturing include: the aerospace, automotive, appliance, aviation, consumer goods, electronics, food and beverage, military, and transportation industries.
In commercial aircraft, for example, gaskets throughout the aircraft keep the cabin from depressurizing. In addition, gaskets are used to make pressure cookers work. Finally, airframes, appliances, business machines, compressors, elevators, escalators, medical equipment, meters, turbines, pumps, valves, engines, plumbing systems and a host of other varieties of equipment require the use of gaskets in order to function safely and effectively.
Gaskets companies - Premier Seals Manufacturing
Gaskets manufacturers - Gardico
Gaskets manufacturers - Gardico
Large Gasketing System - Gardico
Gaskets manufacturers - Arizona Sealing Devices, Inc.
Gaskets Companies - New England Gasket
Gaskets have historically played a very important role in the safe operation of equipment. Gasket failure can have catastrophic consequences, as was the case in the explosion of the Challenger space shuttle in 1986. The failure of an O-ring seal used in the shuttle's fuel system was attributed to low-temperature exposure, which made it become brittle.
The first gaskets of sorts were made in 1820; at that time, manufacturers made solid iron sulphate seals from a combination of water, pack iron filings, and Sulphur powder. Prior to the 1840s, people also made gaskets by picking apart rope and packing it into seams with lubricant or tar, depending on the application. They also used leather gaskets for water pumps, which would eventually degrade and tear apart.
Manufacturers used to make extensive use of asbestos as well; the first asbestos gasket was developed in 1899. For years, asbestos gaskets were used on locomotives, on Navy ships, and with mechanical systems that transported materials like grease, hot oil, and gases. Asbestos gasket use was popular until the 1980s, when scientists discovered its links to cancers. Since the 2000s, asbestos has been highly regulated, and its use is discouraged.
Gaskets didn't really advance until after the discovery of vulcanization in 1850. With this discovery, scientists and engineers were able to begin experimenting with rubber. Of particular importance to the gasket manufacturing industry have been advancements in the field of synthetic rubber development. Synthetic rubber materials have allowed researchers to develop heat resistant gaskets, chemical resistant gaskets, and gaskets with a host of other useful qualities. Today, while gaskets can also be made from plastic polymers, metals, fibers, and more, they are most often made from synthetic rubbers, including custom rubbers like custom neoprene.
Most rubber gaskets are die cut or punched from flat rubber or metal sheets. (A gasket with shapes punched from a sheet is known as a sheet gasket; a gasket with die cut shapes is known as a die cut gasket.) Die cutting allows a gasket manufacturer significant design flexibility. A die cut gasket can be cut into a shape as simple as a basic ring or as complex as an automotive engine block. Some applications require simple gaskets with thick, strong construction. Gaskets such as these don't make sense to make via die cutting. For these, manufacturers can choose rubber molding, compression molding, or liquid injection molding as die cutting alternatives. Also, some gaskets can be laser cut or water jet cut. Laser cutting and waterjet cutting both offer precision and minimum wasted material. Finally, some gaskets are formed when manufacturers place a rubber sealing ring in the center of a washer; in this case, the sealing ring is molded to fit over a bolt.
Common elastomeric materials used to make gaskets include: silicone, neoprene, nitrile (nitrile rubber), EPDM, Viton, and custom rubber. Rubber is the most effective material for gaskets, but gaskets are also made from a wide range of metals, semi-metals, foams, fibers, and other composite material types. Plastics commonly used to make either gasket material or for jacketing include Teflon, nylon, polyethylene (PE), polyurethane and Mylar. Sponge rubber, like open or closed cell silicone, is used for applications requiring a flexible rubber seal. Gaskets are also made out of non-asbestos sheets such as carbon filament, flexible graphite, fiberglass, ceramics, or Kevlar. A gasket made from any one of these materials may be called a non-asbestos gasket.
Gaskets can be customized in all sorts of ways; they range in their design from very simple to very complex, come in all shapes and sizes, and are used for a broad range of sealing applications. You can customize even the simplest type of gasket, the o-ring, or you can get a more complex custom gasket. If you want, for example, you can have your gasket textured to fit into a connection point more effectively. Typical textures include: tapered, ridged, and grooved. However, in order to create a tight seal between two objects, you can ask for virtually any die cut or molded shape.
Gaskets work very simply: Resting in a space between two parts, gaskets create a pressure-tight seal that does not allow any leakage into or out of the component they are sealing.
Gaskets are unique because they allow less than perfectly matched mating surfaces. They allow because they fill in the gaps between them, no matter their shape.
Different types of seals are utilized to make a joint or compartment leak-proof. Some of the most common types of include O-rings, head gaskets, spiral wound gaskets, flange gaskets, and shims. Other gaskets are specialized for specific applications. For example, an exhaust gasket is used only for exhaust management purposes. Likewise, high temperature gaskets are designed to be able to work with extremely high temperatures. Still others are categorized by the material with which they're made. Examples of these include: rubber gaskets, plastic gaskets, metal gaskets, solid gaskets, jacketed gaskets, and silicone gaskets.
The most common gasket accessories include sealing solutions of various kinds. These are especially useful if your gasket will be exposed to the elements.
When installing gaskets, the first thing you need to do is clean your mating surfaces. They need to be clear of dirt, oil, water, and anything else that could get in the way of a high-quality seal. After that, lay your mating surface flat and, if necessary, apply a thin layer of adhesive. The best adhesive for this is a pressure sensitive adhesive. Place it in position, add the gasket, and, if you're using adhesive, continue to apply it, in order to seal it. If not, skip this step and go on to connecting the gasket to the other mating surface. After this, if applicable, let your adhesive sit. If not applicable, another great way to get a better seal is by tighten your gasket with a wrench. This will compress your gasket uniformly.
Note: Because there are so many different ways that you can use gaskets, gasket installation can vary. For advice on gasket installation for your application, talk to your supplier.
In order to stay up to snuff, gaskets need occasional cleaning. Depending on where they're being used, that cleaning can manifest itself in different ways. For example, refrigerator gaskets are best cleaned with warm water, baking soda, and a scrub brush. This non-toxic cleaning method also neutralized odors. Gaskets that can be submerged in water, such as pressure cooker gaskets, should simply be washed in warm, soapy water. Make sure to let them air dry. Gaskets used for other applications, such as vehicles, can also be washed with soap and water. Just make sure to use a gentle cloth, so that you don't scratch them.
No matter how well you keep up your gaskets, they will most likely need to be replaced at some point. Quick tip: If they're cracked or leaking, it's time to replace them. When you do so, make sure to scrape off all of the residue from the old gasket first. You always want to start with a clean, flat surface.
To help prolong the life of your gaskets, also consider investing in a wax solvent or a rubber protectant. Products like these can shield your gaskets from the detrimental effects of UV light, heat, moisture, etc.
The standards to which gaskets must adhere depend largely on the application or industry for which they are intended. For example, sanitary gaskets or gaskets intended for pharmaceutical purposes must be up to FDA and USP Class VI standards. Your gaskets will likely also need to fit the standards of the region or country they'll be working in. The most common standards are BS10 (British/Australian), PN/DIN (European), ASA/ANSI (USA), and JIS/KS (Japanese/Korean).
It's also a good idea to get gaskets that adhere to ASME and/or ISO standards.
When you're searching for the perfect product for your gasket and seal application, keep these things in mind:
There are two major ways to locate a reliable gasket manufacturer: either you perform a search on Google or you can locate an online business directory.
The Google Method
No matter how you choose to find your manufacturer, before deciding to do business, you need to make sure that they're the right manufacturer. How do you know this? Simple: the right manufacturer will treat you with deference, respect, and care. They'll work within your timeline, budget, and custom gasket requirements. Remember: Customer service is key. Good luck!
- 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.