What is a face O-ring?
As the name implies, O-ring Face Seal (ORFS) fittings incorporate an O-ring at the face of the fitting and are designed to eliminate leaks in high pressure hydraulic systems.
What is groove in O-ring?
Designing the parts of an application where o-rings will be applied is broadly termed “o-ring groove design”. In order to seal properly, the o-ring has to deform in the application by being compressed and stretched in any number of ways.
How far should an O-Ring protrude?
This stretch should be between 1%-5% with 2% as the ideal in most applications. A stretch greater than 5% is not recommended. The resulting stress on the O-ring will cause accelerated aging and cross section reduction. Exception to this rule is a floating seal.
How do you select O-Ring groove size?
Select the Seal. If the bore or shaft size you are using is not listed, select the O-Ring with an inside diameter just smaller than the shaft you are using. If you are designing a face seal, select the O-Ring with an inside diameter which will position the O-Ring on the side of the groove opposite the pressure.
How much does it cost to tighten an O-ring?
The general rule for properly tightening an o-ring fitting is hand-tight, plus a quarter turn. Connect the fittings and tighten by hand. Once completed, use two wrenches, positioning them ¼ turn apart [show starting position of 12 o’clock].
How do you select O-ring groove size?
How do you spec an O-ring?
Place the O-ring on a clean, flat, level surface. Determine the inside diameter by using a ruler to measure from one inner edge to another. Use a ruler to measure the diameter, from one outer corner of the O-ring to the other outer corner. Finally, measure the cross-section.
How do you calculate groove for O-ring?
Groove Design: O-Ring Seals
- Calculate the O-Ring groove dimensions. Using the table above, determine the maximum recommended gland depth for your application.
- a. For a rod (shaft) seal:O-Ring Max Groove Diameter = Min Shaft Diameter + (2 x Recommended Gland Depth)
- b.
- c.
How much interference should an O-ring have?
To provide an effective seal, the O-ring’s inside diameter (I.D.) must be smaller than the piston groove diameter, so that the O-ring is slightly stretched, fitting snugly in the groove. This stretch should be between 1%-5% with 2% as the ideal in most applications. A stretch greater than 5% is not recommended.
What do you need to know about O ring groove design?
Designing the parts of an application where o-rings will be applied is broadly termed “o-ring groove design”. In order to seal properly, the o-ring has to deform in the application by being compressed and stretched in any number of ways. The design of the groove where the o-ring sits plays a major role in how the o-ring performs its sealing
How are O rings used in seal design?
Designing the parts of an application where o-rings will be applied is broadly termed “o-ring groove design”. In order to seal properly, the o-ring has to deform in the application by being compressed and stretched in any number of ways.
What causes extrusion in an O-ring groove?
These factors include room for thermal expansion, swell due to fluid exposure, and the effect of tolerance variations in the machined groove and molded o-ring. Extrusion is a concern for radial seals where a designed gap exists between moving components: Either the piston and bore, or the rod and bore.
What do you need to know about static O ring?
Static o-ring face seals, used for a wide variety of applications, come in many shapes and forms. Whether you need bolted flanges or removable lids, this o-ring face seal groove design guide will help you choose the right o-ring for your application. O-Ring Size Charts O-ring, x-ring and square ring size charts.