This metric oring groove design reference guide will help you find the right radius, backup, pressure and other oring dimensions for basic applications. Select an o ring crosssection size from the available standard sizes. The plug diameter h for an o ring must be figured using the minimum clearance gap as given in figure 20 and the maximum clearance gap as shown in figure 22. Calculated values at excentrical position of piston. Techseal division radial seal design guide tsd 5440 1. An o ring can perform sealing by means of squeeze under low pressure conditions.
Gland design oring, seal design oring, seal design 3 considerations finite element static seals axial static 1 axial static 2 trapezoidal conical static boss seal radial static dynamic seals rotary reciprocating to consider 1 to consider 2 to consider 3 semiconductor vacuum sealing permeation outgassing trapped gas oring, seal failure. It is recommended that an oring with tighter cs tolerance. Oring installation design and specification static flange. These types of glands are used in most common static radial applications recommended surface finish. Static crush seals are easy and inexpensive to machine. An oring can perform sealing by means of squeeze under low pressure conditions. 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.
Radial applications can be differentiated between static and dynamic. Static oring gland design a high level run down linkedin. Typical o ring static seal glands grooves see gland groove detail above. 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. Flange seal radial seal dovetail seal boss seal crush seal. We have like 5 different standards for many different situations, but admittedly i work at a very large company.
Gland design static radial applications are easier to comprehend with ace seals engineering. Static seal gland design chart tube od b throat dia. Both are interlinked, thus ensuring the best possible combination of the calculated oring size and material choice. Dynamic reciprocating o ring gland design in reciprocating sealing applications there is a back and forth or reciprocating motion along the shaft axis between the inner and outer parts of the gland. Orings are often referred to as piston and rod seals when used in these types of applications. Eriks nv oring technical handbook oring gland design. The design charts indicate a surface roughness value not to exceed 32 microinches 32 rms on the sealing surfaces for static seals with a maximum of 16 rms recommended for facetype gas seals. A dovetail face seal is a special static gland designed to retain the oring in the groove. The seal assembly consists of an elastomer o ring and a gland. Find the recommended o ring size and gland dimensions in the appropriate design table in static o ring sealing or dynamic o ring sealing, sections iv and v, respectively. Up o a k ing pressure g no backup ring 00 b 63 g one backup ring g two backup rings oring gland design for static seals a b1 groove dia.
Make sure the squeeze % is sufficiently high enough to seal, but low enough to allow dynamic movements. Oring sizes have been standardized and range in size from an inside diameter of 0. No less than 75% of the seal crosssection should be contained within. Metric oring groove dimensions are listed for the most common metric cross sections with and without backup rings. Having a circular cross section that functions as a seal, in both static and dynamic applications, by being compressed between the mating surfaces comprising the walls of the gland, in which it is installed. These guides provide the necessary information to effectively install and fix gland design static radial applications. In radial seals, the gland is defined by the bore diameter on the outside radius, the groove diameter on the inside radius, and the groove width in the axial direction see schematic inner diameter. The seal assembly consists of an elastomer oring and a gland. More information, including design criteria on o ring drive belts and their application will be found in o ring applications, section iii. Sae as5857 gland design, oring and other elastomeric seals.
An oring is a circular crosssection ring molded from. Static applications there are five types of static oring applications. Selecting orings for static and dynamic applications. An o ring is a simple and versatile ring shaped packing or sealing device. An o ring seal is used to prevent the loss of a fluid or gas. The three main types of standard groove designs are industrial static also called radial, industrial reciprocating also called dynamic, and face seals also called. One general guideline for good oring application and design is to maintain a range of % sqeeze on the oring 1040% for static and no more than 30% for dynamic. More specific information is available throughout this guide. Gland detail finishes are rms values break corners approx. Static oring groove design of rod and piston glands is a key consideration when selecting orings for common static radial applications. Metric oring groove designs vary greatly and choosing the right one for your application is important for maximum oring performance. In a dovetail oring gland application the oring squeeze is primarily axial in direction, where a valve exerts force on the top and bottom of the orings surfaces. Since there is no extrusion gap, there are fewer design steps and you can control the tolerances easier. Static oring gland design a high level run down published on november 9, 2015 november 9, 2015 23 likes 6 comments.
The following are some major differences between static and dynamic orings. For industrial use, order the oring by the parker compound number followed by the size number. Static axial seals tend to be easier to design than static radial seals. This document establishes standard gland design criteria and dimensions for static axial oring seal applications without antiextrusion devices. Oring installation design and specification for dynamic. However, this sealing solution hides the risk that during assembly the o ring may become twisted and that the position of the backup ring is not optimal.
Our oring analyst software generates standard static oring gland dimensions, and presents them in an editable format so the user can optimize them for. In order for the oring to fit snugly in the groove, it is desirable to circumferentially stretch the oring slightly. Static radial oring gland design in a static radial seal application the oring is squeezed between the inner i. For example, if your o ring s crosssectional diameter is 1. Seal implementationrelated software kalsi engineering. Oring installation design and specification static.
Oring installation design and specification static cylindrical. Reference charts for designing the right oring groove dimensions for optimal oring performance, then order orings online from the worlds largest oring inventory network. O ring is already where it needs to be as a result of the pressure. This equation can obviously be repeated for cases of the oring andor groove at the dimensional extremes if a designer feels the need. Sae as6235 r face seal gland design, static, oring and. Contact ace seal today for more information regarding our design guides. The engineering design guides developed by ace seal are intended to provide assistance. Sae as5857 gland design, oring and other elastomeric. The extent of extrusion depends upon the hardness of o. Oring groove design guide for static id od rod piston glands. This sae aerospace standard as specifies standardized gland design criteria and dimensions for static face seals for internal pressure and external pressure applications for aerospace hydraulic and pneumatic applications using the same size range as as4716 and as5857 where applicable.
After selecting a material that fits your sealing application, you can continue by having the size selector calculate the oring dimensions and tolerances. Static stationary rod and piston oring gland design default chart id od. Seal implementationrelated software oring analyst rev. Apr 06, 20 i would lean toward placing the o ring at the bottom of the hole, if your design is amenable to this. The designer will be making tradeoffs between dimensional. Spiral failture techseals double chamfer seals and drings are radial seals that have flat inner diameters and machined outer diameters. Parkers calculators not only address standard oring sizes, but allow users to custom design oring glands and seals specifically for their application. Since its initial release in 1957, the parker oring handbook has become a.
Gland design o rings and rubber parts supplier techno ad. Determine the maximum clearance present in your application. An oring seal is used to prevent the loss of a fluid or gas. You can and i personally do use orings at pressures that high, but right around 10,000 psi and above you have to use a backup ring system if you want long. These seals are commonly used in static applications. The table below lists recommended dimensions for static radial seal glands by as568a oring dash numbers. This book contains extensive information about the properties of basic sealing elastomers, as well as examples of typical oring applications, fundamentals of static and dynamic seal design and oring failure modes. Section ww oring face seal glands these dimensions are intended primarily for face type oring seals and low temperature applications. Oring gland design the following pages contain basic oring gland design information.
There are fewer design steps and tolerances are easier to control. Dynamic reciprocating gland design, dynamic oring gland. Static face or flange oring seals designs, and gland. Ring one ring two rings gland depth f groove depth ref. Pressure g no backup ring pressure g 1 one backup ring pressure g 2 two backup rings. 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. The oring selector covers both imperial and metric standards. Eriks technical manual oring gland design information. Nominal actual depth actual % clearance width radius max. These developmental design guides make it easier for the user to install and manipulate orings with a standard axial squeeze gland design. Static testing checks the code, requirement documents, and design documents to find errors whereas dynamic testing checks the functional behavior of software system, memorycpu usage and overall performance of the system.
Additionally, the oring volume should not exceed 90% of the minimum gland void to allow the oring to deform. The plug diameter can also be calculated by subtracting the minimum gap from the minimum bore giving the maximum plug diameter. Select an oring crosssection size from the available standard sizes. Oring groove design guides for face seal flange, dovetail flange, static cylinder and piston, and dynamic cylinder and piston designs. Oring seals for static and nonrotary dynamic applications. The extent of extrusion depends upon the hardness of o ring, the pressure, and the size of the clearance gap. An o ring is a circular crosssection ring molded from. Finishes are rms values refer to design chart 41 below and design table 41. Nov 09, 2015 there are standard gland design dimensions for all series of orings used in a static configuration which can be found in multiple publications such as the parker handbook and differ only slightly. Metric o ring groove designs vary greatly and choosing the right one for your application is important for maximum o ring performance. Both are interlinked, thus ensuring the best possible combination of the. The following pages contain basic oring gland design information.
Static gland male static gland female oring w l e a, c g r size cross section gland squeeze diametral groove groove eccentricity no. You could probably get away without using the inner part of the gland since i also infer that your pressure is internal, and the pressure would only be pushing the o ring outward. Parker recommends utilizing our design tools mobile inphorm and the oring selector design software to guide the user through the design and selection of an oring and corresponding seal gland. Introduction double chamfer seals and dring seals figure 1. In these applications the oring is completely confined and pressure deformed within a 45. Find your o ring s squeeze amount in inches by subtracting the gland depth from crosssectional diameter with a calculator. Static axial engineering design guide ace seals gland. Installation dimensions vary with duty and application, and the user may find it easy to consult manufacturers catalogs, which are typically configured as shown in figure 1020.
Oring face seals are used in a variety of applications, including bolted flanges or removable lids. Compression results take into account crosssectional. Static radial gland design, static radial oring groove design. Rings ring rings radius max oring gland design for static seals note. Selecting high performance orings for static and dynamic applications. The engineering design guides developed by ace seal are intended to provide assistance with gland design static axial applications. Static crush gland design in crush seal applications the oring is squeezed at an angle relative to its cross section. Gland design static radial applications are easier to comprehend with ace seals engineering design guides. For industrial use, order the o ring by the parker compound number followed by the size number. The material used to manufacture dynamic orings should be tougher than that used to manufacture static orings. Gland depth x groove width area of the gland must be larger than the cross section area of the oring pi x r2. Typically used in static or slow moving applications the dovetail orings gland purpose is to properly hold the oring in place during machine operation. Simple selection tool to easily order online today. Otherwise many bad things will happen to your design.
Gland detail finishes are rms values refer to design chart 43 below break corners approx. This is because the dynamic oring will have to undergo movement while the application is functioning. Groove design guide for static oring face seals provides default recommendations on width, depth, diameter and more for basic applications. Squeeze inches o ring cross section diameter in inches gland depth. 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. If you are unsure what crosssection size to use, see here. More information, including design criteria on oring drive belts and their application will be found in oring applications, section iii. Oring is already where it needs to be as a result of the pressure.
Sae as6235 r face seal gland design, static, oring. Squeeze inches oring cross section diameter in inches gland depth. Find your orings squeeze amount in inches by subtracting the gland depth from crosssectional diameter with a calculator. Gland depth x groove width area of the gland must be larger than the cross section area of the o ring pi x r2. Orings are a critical component of nearly every type of application. 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. Please contact the local eriks representative if an application does not clearly fall into these design parameters.
The criteria herein are similar, but not identical, to those in m. In the hardware configuration, you can choose between different sealing cases such as radial piston or rod sealing, axial sealing with internal or external pressure. Static testing was done without executing the program whereas dynamic testing is done by executing the program. O ring seals for static and nonrotary dynamic applications. This static oring groove design guide will help you find the right static oring dimensions.
Customary units have been provided for reference purposes. Gland design static radial application custom oring. As568b standard oring 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. In this way, assembly would be simple just drop the o ring in. Static radial gland engineering guide static radial. Section ww 32 r g fl 32 63 63 12e w w w gland w depth ld. Oring design, static seal designs and gland dimensions. Gland det ail gland dimensions industrial static seals refer to design table below for dimension w w w. Static face or flange oring seals are much easier to design than static radial seals since in this type of design there is no extrusion gap.
Gland design, oring and other elastomeric seals, static applications this sae aerospace standard as provides standardized gland groove design criteria and dimensions for elastomeric seal glands for static applications. Have you checked within your company for an o ring gland design standard. Gland detail 16 r g f l 32 x x 12e w w w gland w depth ld. Typical oring static seal glands grooves see gland groove detail above. Design chart 41 for industrial oring static seal glands o r ing w l e a g groove width r max. Generally, an oring design should maintain a 1040% squeeze for static applications, and no more than 30% for dynamic. 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. These donutshaped engineered high performance seals, seal connections in equipment by forcing a rubber seal into a channel and applying mechanical or hydraulic pressure to prevent clearance of a less viscous material.