Make sure the squeeze % is sufficiently high enough to seal, but low enough to allow dynamic movements. Otherwise many bad things will happen to your design. Oring inner diameter stretch, outer diameter squeeze. They cover more surface than roundprofile orings for a better seal in static applications, such as hose, pipe, and faucet connections. How to design and calculating the proper groove dimensions for the installation of orings. To use this document, first identify if you have a female or male o ring gland requirement. Air force first regulated o ring sizing under the system as568. Worldwide unique online calculation tool taking into consideration of the thermal expansion of. Square rings fit in oring grooves and are interchangeable size for size. Jan 03, 2010 hi everybody, i want to design an o ring groove. The o ring is compressed in the radial direction when seated in the gland.
The extent of extrusion depends upon the hardness of oring, the pressure, and the size of the clearance gap. Communicate directly with our dedicated team of experienced professionals empowered. Prototypes and samples prototypes and samples are produced from experimental moulds. Compression results take into account crosssectional reduction due to installation stretch.
Please consult with your o ring manufacturer for custom or application specific requirements. Static axial engineering design guide ace seals gland. In most static applications, a square ring will serve as a direct replacement for an oring and generally will perform a high. To avoid tearing or nicking, the use of oring lubrication is recommended while installing the oring into the dovetail gland. Dovetail glands are used in static or slow moving dynamic applications, and require strict tolerances that are difficult to control. Cold set can be reduced by using a more flexible polymer structure, this would be reflected in a lower glass transition temperature. I need to get a seal as my adapter fits inside a 10mm bore. Square cut o rings square o rings supplier rocket seals. Design and dimension the groove that your o ring will go into by researching our o ring groove design guide.
The modular design allows a variety of endcaps to be attached to the flange. Reference charts for designing the right oring groove dimensions for optimal oring performance, then order orings online from the worlds largest oring inventory network. Browse the function and availability of each groove design. Jan, 2019 im making a vacuum chuck adapter for my woodworking lathe. An oring is contained in a gland and forced to flow into the surface imperfections of the glands and any clearance gaps available to it. A properly designed o ring groove allows the o ring to be squeezed diametrically outofround even before the application of pressure. The fourlobed design not only provides lower friction than the square cut o ring but also, due to its square crosssection, it resists spiral twist. Contact us or request a quote today for more information on o ring cord. Select an o ring crosssection size from the available standard sizes. Gland design should also be checked to ensure the o ring is not overcompressed with too much squeeze applied. Ace seal supplies o ring cord stock as either bulk cord spooled or spliced and vulcanized into custom o rings. You need to be registered and logged in to see the oring calculation software.
Take the guesswork out of oring design and selection with mobile inphorm. Our primary products are o rings in over 30 different compounds. Request a quote millions in stock or made to order in a few weeks without tooling fees. As568b standard o ring groove design contact us for assistance or samples the three main types of standard groove designs are industrial static also called radial, industrial reciprocating also called dynamic, and face seals also called axial or flange. This metric o ring groove design reference guide will help you find the right radius, backup, pressure and other o ring dimensions for basic applications.
An o ring, also known as a packing or a toric joint, is a mechanical gasket in the shape of a torus. An o ring can perform sealing by means of squeeze under low pressure conditions. O ring seals for static and nonrotary dynamic applications. Squeeze inches oring cross section diameter in inches gland depth. The oring selector covers both imperial and metric standards. When the quad ring is squeezed upon installation, they seal with the 4 small contact surfaces on the top and bottom. The o ring is the most widely adopted seal in history because hardness rating shore a scale. An o ring is contained in a gland and forced to flow into the surface imperfections of the glands and any clearance gaps available to it. Our online oring calculator offers a quick and easy way to calculate oring. Metric o ring groove designs vary greatly and choosing the right one for your application is important for maximum o ring performance.
Gland depth x groove width area of the gland must be larger than the cross section area of the oring pi x r2. Choose a standard size as568 o ring using this o ring size chart. Squarering seal size chart standard squarering seal size. Nearly all custom size o rings, washers, square rings, and xrings in almost every material are supplied without tooling fees. An oring can perform sealing by means of squeeze under low pressure conditions. Dovetail o ring gland design in dovetail applications the o ring is squeezed primarily in an axial direction, with a valve exerting force on the top and bottom of the o ring sealing surfaces. Oring installation design and specification static. This web based mobile app offers material recommendations, fluid compatibility, and gland seal calculations standard sizing design analysis. Hence, one can think of the o ring crosssection as being pinched between the bore diameter b d and the groove diameter g d. Oring sizing charts usa as568 parker oring size chart, xring square ring size charts. The subsequent series production may differ in terms of production tech. I presume if you know the o ring crosssection dia and inner dia of o ring you can use the as568a serieschart and find the required dimensions.
You need to be registered and logged in to see the o ring calculation software. This also creates a lubricant reservoir formed between the sealing lips that. The o ring groove calculator enables engineers to specify an o ring groove for any given o ring or vice versa calculates the best suitable size o ring for any given groove. Square rings are available in a variety of rubber and plastic materials such as buna, viton, epdm, teflon, etc. Available now our user friendly and easy to use the o ring groove calculator. We serve customers around the world from our o ring warehouse in clarkston, washington. For industrial use, order the oring by the parker compound number followed by the size number. Male gland female gland 12 e o ring gland design for eciprocating seals w i. Both are interlinked, thus ensuring the best possible combination of the calculated oring size and material choice. Oring guide parker hannifin prdifa technology division parker. Take the guesswork out of o ring design and selection with mobile inphorm. The extent of extrusion depends upon the hardness of o ring, the pressure, and the size of the clearance gap.
Both are interlinked, thus ensuring the best possible combination of the. For existing applications, there is no need to change the design or procedures. Squeeze inches o ring cross section diameter in inches gland depth. Eriks standard orings and load them also into your created design. Otherwise contact us and we can custom mold any size or shape o ring you need. In order for the o ring to be compressed when in the gland, its crosssection diameter cs must be greater than the total effective depth of the. Pressure above 150 barrecommend to use backup ring. Basically, you want the o ring to take on a slightly triangular shape, as it is compressed into the gland.
Find the recommended oring size and gland dimensions in the appropriate design table in static oring sealing or dynamic oring sealing, sections iv and v, respectively. Determine the maximum clearance present in your application. Excentricity info inner diameter stretch at inst % inner diameter mm. The engineering design guides developed by ace seal are intended to provide assistance with gland design static axial applications. This flange has a double oring seal that fits in the tube of the water tight enclosure for rovauv 4. The following chart gives typical gland dimensions for common o ring sizes. Parker recommends utilizing our design tools mobile inphorm and the oring selectordesign software to guide the user through the design and selection of an oring and corresponding seal gland.
Gland depth x groove width area of the gland must be larger than the cross section area of the o ring pi x r2. Oring groove design guides oring groove charts for standard oring gland designs. Since 2007 we have been making getting o rings easy by continuing to improve our people, product and process. These developmental design guides make it easier for the user to install and manipulate o rings with a standard axial squeeze gland design. Ive searched most of the threads here that mention o rings, and tried out several of the online o ring calculators that were mentioned in those threads. Material and dimensional considerations during the hydraulic seal selection process this normally takes place within a triangular gland created by machining a 45degree angle on the outermost edge of the male component. Bunan oring assortments these orings have a square profile with flat edges on all four sides. Parkers calculators not only address standard oring sizes, but allow users to custom design oring glands and seals specifically for their application. From the chart below, identify your nominal o ring desired size, then your o ring gland depth requirements. These dimensions will also be different if the o ring is sealing a liquid which has a low volume.
After you have verified your nominal o ring size functionality within your assembly, specify design your o ring groove gland. Design dimensions for o ring installation o rings are normally used as seals in several ways, and dimensions of the groove or gland will also vary with the cross section of the ring, the type of operation, and the amount of pressure used in the system. Login or register here to start the o ring calculator. The primary reason for using a square ring in a sealing application is that they perform the sealing function in a superior manner and at a cost lower than any other comparable sealing device. If you are unsure what crosssection size to use, see here. Seal implementationrelated software kalsi engineering.
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