Stainless Steel Pipe Fittings

Types of Gasket By yaang.com

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Types of Gasket By yaang.com

Spiral Wound Gasket comprise a mix of metallic and filler material. The gasket has a metal wound outwards in a circular spiral with the filler material wound in the samemanner but starting from the opposing side. This results in alternating layers of filler and metal. The filler material in these gaskets acts as the sealing element, with the metal providing structural support.

Spiral Wound Gaskets can be reinforced with inner ring or outer ring or both. The outer centering ring holds the gasket centrally within the bolt circle and inner ring improves. The axial rigidity and resilience of gasket. 



Properties



  1.Suitable for use across wide pressure range and temperature.

  2.Spiral wound gaskets can be used to seal fluid pressure upto 400 bar and cryogenic temperature as low as -200°C and upto elevated temperatures of 1000 deg celcius.

  3.Due to its simple design, Spiral Wound Gaskets are easy to install.

  4.Due to the options of different winding materials, It can be tallored to awide range of operating conditions.

  5.Easy to remove.

  6.Cause no damage to the flange



Kammprofile Gasket :

Kammprofile Gasket is Manufactured from solid metal, has an added advantage i.e It provides reduced area of contact which creates low seating stress, thus, gives a better sealing.Kammprofiles are ideal for confined locations.



Kammprofile Gaskets are a replacement for heat exchanger gaskets.



The sealing core is a solid metal gasket with concentric serrations on both the sides and then faced with soft material like flexible Graphite, PTFE, EPDM etc.



It is used for tongue and groove, and has no guide ring. It is a replacement to heat exchanger gaskets where low seating stress is required. Selection offacing material can be specifed to suit the application.



Metal Jacketed / Heat Exchanger Gasket :



Double Jacket or Heat Exchanger

Metal Jacketed /Heat Exchanger Gasket consist of softmaterial filler and a metal cover. The filler material forces metal to deform so that it gives effective sealing. The jacket and filler materials are selected keeping in mind the chemical performance and to optimize the temparature. These gaskets are used in heat exchangers, pressure vessels, tanks etc. 

Following are the reasons as to why welded construction in metal jacketed gasket should be preffered instead of one piece metal

jacketed gasket:

   1.Cost effective due to reduced metal consumption.

   2.With welded pass bar construction, primary sealing is added to the gasket, thus in case of any leak occures through the      pass bars,primary seal maintains its function.

   3.Less time to manufacture

   4.Longer sealing life.

Metal stated below are standard. Other metal can also be served as per requirement.



   1.Soft Iron

   2.Brass

   3.Inconel

   4.Silver

   5.Nickel

   6.Monel

   7.Hasteloy

   8.Stainless Steel

   9.Copper

  10.Titanium

Filler Material



   1.Graphite

   2.PTFE

   3.Non Asbestos Material



Non Metallic Gasket :

These gaskets are used for low pressure classes. The material selection can be done according to the specified application. Thickness can be obtained as per the requirement. 



These are also called as ‘SOFT GASKET’. As the name says, can be compressed under low bolt. Non Metallic Gaskets are also used in applications ranging from flange and heatexchanger etc. 



Non Metallic Gaskets can be obtained in any shape as per the diagram. 



We offer a wide range of material for the Non Metallic Gasket: 

  1.Compressed Non Asbestos Gasket

  2.Expanded PTFE Gaskets

  3.PTFE Envelope Gaskets

  4.Graphite Cut Gaskets

  5.Virgin/Glass – Filled/Broze filled PTFE Gasket

  6.EPDM Gaskets



Ring Type Gasket :

Ring Type Joints (RTJ) are precision machined, metallic sealing ring suitable for high temparature and pressure application. 

Ring Type Joints can be produced in any sutable material depending upon the application. 

Material selection should be selected keeping in mind that it is softer than the Mating Flanges. 

Material for Ring Gasket are

Soft Iron, Low Carbon Steel, 4-6 Chrome 1/2 Mo, Stainless Steel 410, Stainless Steel 304, Stainless Steel 316.

Source: Zhejiang Yaang Pipe Industry Co., Limited (www.yaang.com)

Article Categories:
Metals

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