OmniSafe Particle Study – Stainless Steel Gaskets

Stainless steel gaskets are required in certain gas systems such as carbon monoxide, ozone, and trimethyl arsenic. Because SS gaskets are harder than nickel, the torque induced problems of sealing and galling are amplified. Due to the SS sealing problems, some companies have specified silver plated SS gaskets to reduce friction and galling. Recently these…

Non Destructive Multi Mate/Demate Metal Seal Formation

Metal gaskets under compression, along a torroidal interface, exhibit plastic and elastic deformation. The elastic deformation is the “spring back” in the gasket indentation that occurs when the fitting is demated. The plastic deformation is remaining the indentation left in the gasket. The elastic deformation is directly proportional to the plastic indention, (i.e. 10%). As…

OmniSafe Particle Study – Multiple Make Up

This is the equipment and procedure used to determine the quantity and size of the particles shed into the process stream, due to galling, as a legacy metal face seal fitting is tightened. Objectives Compare standard metal face seal fitting with the OmniSafe torque suppression fitting over the following criteria: Examine the sealing surfaces of…

Counter Rotational Displacement – Standard VCR vs. OmniSafe

How much rotation is transferred to the components connected by a “VCR type”* metal face seal fitting as it is tightened with a nickel gasket? This data below shows that the relative rotation of the components ranges from 6.7 to 18.2 degrees. This rotation is based on the plating inside the female nut and the…