Understanding Sizing of Semi-Metallic Gaskets When Replacing Soft Gaskets

Sizing Semi-Metallic Gaskets When Replacing Soft Gaskets

When replacing soft gaskets with semi-metallic gaskets, it's important to understand the sizing differences and considerations. The following guidelines provide suggested dimensions based on experience to help you choose the appropriate non-metallic gasket size to replace a soft gasket. These sizings are not mandatory but serve as useful recommendations.

1. When Flange Dimensions Are Provided

If the customer provides the dimensions of the flange, the following guidelines can be used to determine the appropriate gasket size:

Gasket Inner Diameter (I.D.): The inner diameter of the gasket should be the bore size of the flange plus a minimum of 1/8".
Gasket Outer Diameter (O.D.): The outer diameter can be up to the bolt hole circle diameter minus one bolt hole diameter. This applies when the proposed gasket width corresponds to the standard width of semi-metallic gaskets, which is typically 1/2", 3/4", or 1".

If the desired gasket width does not match these standard widths, you can choose an appropriate standard width for the gasket and use an outer ring to centralize the gasket. This approach helps in maintaining the proper placement and sealing effectiveness. For example, you might consider using the Maxiprofile type LA1 or LA3 to achieve the desired fit.

2. When Soft Gasket Dimensions Are Provided

If the customer provides the dimensions of an existing soft gasket, you can follow these steps to specify the dimensions for a semi-metallic gasket:

Semi-Metallic Gasket Inner Diameter (I.D.): This should be the same as the inner diameter of the soft gasket.
Semi-Metallic Gasket Outer Diameter (O.D.): The approach for determining the outer diameter is the same as described above. Ensure the O.D. is up to the bolt hole circle diameter minus one bolt hole diameter, depending on the standard width of the gasket.

Conclusion

Replacing soft gaskets with semi-metallic ones requires careful consideration of the gasket dimensions to ensure a proper fit and effective sealing. By following the above guidelines based on either flange or existing soft gasket dimensions, you can make an informed decision on the appropriate gasket size. Remember, while these suggestions are based on industry experience, always verify the sizing with the specific requirements and conditions of the application.

Comments

Choosing the Right Sealing Gaskets for Power Oil Transformers

Transformers are an essential part of the electrical power distribution grid. Transformer gaskets’ materials are critical for their performance and longevity. Hence, this requires the best selection of sealing materials as leakage can lead to oil contamination of surrounding environment, damaging insulation materials and significantly reducing the life of a transformer. Proper gasket material will help maintain the transformer’s dielectric strength, prevent oxygen, nitrogen and/or moisture leaks, prevent oil contamination and more… Below are some options to consider for proper gasket material selection: Cork with Nitrile binder : traditional material used for decades. Easy to compress in place, fair weather and oil resistance. Low cost Nitrile rubber (NBR) : for general purposes with operating temperature between -30°C to 100°C. Low cost, easily available Fluoroelastomer ( V iton ® B, FKM) rubber : application for higher temperatures to 200°C. Expensive,

Which Removable Insulation Cover Materials to chose?

Flexible, removable insulation covers find application in heavy industries where swift or regular access to equipment is essential. These covers are crucial for insulating heat (or cold) to ensure safety, energy efficiency, and precision in industrial processes. A common inquiry revolves around the choice of fabric under specific circumstances. One pivotal factor to contemplate is whether the material is in direct contact with the equipment or exposed to external elements. Presented below is a Decision Table to assist you in making informed choices: Link We hope this table will facilitate your choice next time you require flexible removable cover insulation. Call Robco or Prodimax if you need further information.

Quel joints d'étanchéité choisir pour transformateurs électriques à l'huile

Les transformateurs sont un élément essentiel du réseau de distribution de l'énergie électrique. Les matériaux utilisés pour les joints de transformateurs sont déterminants pour leurs performances et leur longévité. Il est donc nécessaire de sélectionner au mieux les matériaux d'étanchéité, car les fuites peuvent entraîner une contamination de l'environnement par l'huile, endommager les matériaux d'isolation et réduire considérablement la durée de vie d'un transformateur. Un matériau d'étanchéité approprié permet de maintenir la rigidité diélectrique du transformateur, d'éviter les fuites d'oxygène, d'azote et/ou d'humidité, de prévenir la contamination de l'huile, etc. Vous trouverez ci-dessous quelques options à considérer pour le choix d'un matériau de joint approprié : - Liège avec liant Nitrile : matériau traditionnel utilisé depuis des décennies. Facile à comprimer en place, bonne résistance aux intempéries et à l&#

Robco Expert

Search This Blog