Using Equations 3 and 4, calculate the minimum and maximum seal cross-sectional compression (squeeze). A good “rule-of-thumb” is to not exceed about 90% gland fill.
If the gland fill exceeds 100%, the groove will have to be redesigned. If you are using a back-up ring in your application, increase the groove width by the maximum thickness of the back-up ring.ĭetermine the maximum percent gland fill using Equation 6. Refer to the table above to determine the groove width for the O-Ring cross-section size you have selected. With a face seal, if the two surfaces to be sealed are in direct contact (such as with a cover), the seal groove depth is simply the Recommended Gland Depth Then, calculate the O-Ring groove diameter as follows:Ī. For a rod (shaft) seal:O-Ring Max Groove Diameter = Min Shaft Diameter + (2 x Recommended Gland Depth)ī. For a bore (piston) seal:O-Ring Min Groove Diameter = Max Bore Diameter – (2 x Recommended Gland Depth)Ĭ. For a face seal:O-Ring Max Groove Depth = Recommended Gland Depth – Application Clearance Using the table above, determine the maximum recommended gland depth for your application. Note: The graph provides clearance values as radial values, so divide the number obtained in the preceding step by 2 to obtain your radial clearance. If the clearance is unacceptable, component tolerance will have to be tightened, a harder material will have to be special ordered, or a back-up ring will have to be used. Minnesota Rubber and Plastics standard-line products are made from materials having a hardness of 70 Shore A. For a face seal, subtract the distance between the sealing surface and the mating surface.ĭetermine if the clearance is acceptable for the application pressures and the material hardness being used by checking the graph. For a radial seal, subtract the minimum rod (shaft) diameter from the maximum bore diameter. If you are unsure what cross-section size to use, see here.ĭetermine the maximum clearance present in your application. Select an O-Ring cross-section size from the available standard sizes. Inflatable Seal and Clamp Custom Capabilities.Inflatable Seal and Clamp Configurations.Selection Guide/Standard Size Quad-Ring ® Brand Seals and Quad ® Brand O-Rings Seals.
Quad-Ring ® Brand Rotary Seal Application.Quad-Ring ® Brand Seals for Rotary Applications With Oil.Sealing Systems Rotary Seal Application.Quad-Ring ® Face Seal Application Example.Quad-Ring ® Brand and O-Ring Seals for Face Seal Applications.Defining Factors in Sealing Applications.Temperature Resistance of Thermoplastics.Structure of Thermoset Plastics vs Thermoplastics.FKM Compounds for Fuel and Chemical Industries.Rubber Resistance to Chlorine and Other Water Treatment Chemicals.International Certifications – Potable Water.NSF International ® Potable Water Applications (ANSI/NSF Standard 61).FDA Regulations/Food & Beverage Applications.Avoiding Rubber Component Design Problems.
0 kommentar(er)
