NEW

Different elastomers for o rings and various applications

An elastomer is a primary raw material used for most o rings. They are typically manufactured as gum rubber or manufactured synthetically, and surprisingly today, there are approximately over 32 different synthetic rubbers now available.  Elastomer compounds will...

Spiral wound gasket thickness – what’s best?

It is often recommended that using a thinner gasket type/material will result in better sealing performance.  Why?  Because thinner gaskets tend to require much less gasket stress to provide applications with the perfect seal, they also have an excellent response to...

Choosing the correct oil seal application

Choosing and using the proper sealing devices within oil and gas applications can be vital when preventing dirt, dust, water, and other debris from potentially getting inside and contaminating products.  Of course, all rubber materials and seals will provide a range...

Nitrile rubber, NBR, and Buna-N – how well do you know your o ring materials?

A widely used elastomer, Nitrile, Buna-N, or NBR rubber, are all oil and fuel resistant and provide a great level of strength, making them a popular material for seals across various industries.  Suitable for a range of applications, this versatile rubber material,...

Optimum squeezing force for an o ring

It is true that the more squeeze you place on an o ring, the tighter the seal it will provide. In essence, the more squeeze (compression) you apply, the greater the force between the o ring and its mating hardware.  And ensuring you have the perfect seal is all...

O Ring Squeeze

The squeeze and shrinkage on an o ring are vital to understanding as these factors stand in the way of your application either experiencing a perfect seal or your application suffering from leaks.  You can measure the shrinkage of an o ring during...

Keeping your o rings bonded

EMI o rings. Those seal ring gaskets are made of silicone compounds, combining environmental sealing with electromagnetic interference protection.  Consisting of metal or metal-coated particles, silicone o rings are filled with silver, silver aluminium, or nickel...

The importance of mechanical seals when reducing water consumption in mining

Environmental considerations are at the top of most industry's agendas in the 21st century as companies evaluate and improve operations, processes, and systems.  Conserving water in mining is one such area that is now being investigated further with the rotation of...

How choosing the correct gasket reduces risks

Health and Safety across any industry are vital, especially so in industrial facilities and settings.  Why?  Because harmful leaks and emissions must be avoided at all costs to avoid serious accidents or injury to your teams and property.  That’s why having the right...

How to tighten your bolts perfectly

How to tighten your bolts and which tools you should use to achieve the perfect seal is not as seamless and straightforward as we would like. Various factors come into play in these situations, such as bolt grade, size, and even application type.  Tightening torques...

COMPRESSION PACKINGS 

Braided Gland Compression Packings and Seals are used to seal a variety of fluids under a range of service conditions and are designed to operate under either static or dynamic applications. 

Compression Packings, named as such due to the manner in which they perform the sealing function, are the oldest and still most common sealing device for controlling the leakage of liquids or gases at Shafts, Rods or Valve stems. They are used to seal against media such as water, oil, gases, solvents, acids and other chemicals at varying temperatures and pressures.  

Compression Packings are available for many uses, in Centrifugal and Reciprocating Pumps, and for static duties including Furnaces and Tank Lids and for use in Valve Stems   

Braided Gland Compression Packings and Seals

Industries served 

  • Petrochemical 
  • Pharmaceutical 
  • Marine 
  • Water 
  • Sewage 
  • Nuclear Power 
  • Chemical 
  • Pulp and Paper 
  • Oxygen Service 
  • Valves, Pumps and Rotating equipment 

We have a wide range of packings available, made as a soft, pliant and resilient material to match the temperatures, pressures and speeds of your fluid handling systems and plant. 

Product Benefits 

  • Suitable for the most abrasive and chemically aggressive industries and applications 
  • Meet specialist requirements of potable water, food and oxygen duties 
  • Specific packings can cover a range of valve duties thus rationalising product range 
  • Suitable for use in poor mechanical conditions 
  • Fugitive emission control 

Compression Packings are made from a wide range of materials in many different styles of construction and many different sizes to suit many different service applications. They are generally supplied in boxes, each containing one 8 Metre length. 

Below is a list of the most common styles of construction and the most readily available materials 

Manufacturing Construction Styles

X Braided or Inter-Braid, Cross Plait or Diagonal Braid

X Braided

Also known as Inter-Braid, Cross Plait or Diagonal Braid is formed when yarns crisscross through each other from the surface diagonally through the body of the packing. This ensures all strands are strongly locked by each other to create a solid and stable structure that will not fall apart during service. Having an even distribution of yarn density allows for improved lubricant retention.  

Square Braided

Square Braided

The square braid is formed when strands of material pass over and under further strands running in the same direction. These square braid packings, which are usually soft and pliable, having a loose structure allowing for a high percentage of lubricant to be added, are used for high speed rotary service at relatively low pressure. The softness of the braid makes it usable on old and worn equipment  

Braid over Braid

Braid over Braid

Also known as Round Braid or Braid over Core this construction style is achieved by braiding thin jackets of yarn around a core material either of the same, or different, material. This style of packing is relatively dense and recommended for us in high pressure, slow speed, generally static, applications. 

Material Choices

With many different material variations there is a packing product for every application, from food, beverage and pharmaceutical PTFE based dry packings to heavily lubricated graphite or aramid fibre packings ideal for duties involving highly abrasive media.  

Correctly identify, and Inform us of, the following parameters, Size, Temperature, Application, Media, Pressure and Shaft Speed and SSP will be able to supply an ideal, reliable and cost-effective packing product to provide ultimate sealing performance. 

Braided Graphite Packing

Graphite

Using high performance pure Graphite offers high temperature and pressure capability and good chemical resistance for outstanding sealing performance. 

There are many different material versions and combinations used to produce a braided packing with enhanced performance characteristics that will perform in varying and demanding service conditions. These requirements may include very high pressure applications where an Inconel wire reinforcement can be incorporated into the braiding body, or inducing a graphite or PTFE lubricant to increase material density, improve sealing performance and reduce stem wear.  

  • High Temperature Applications 
  • High Pressure Applications 
  • Excellent Chemical resistance 
  • Excellent Sealing and Operational reliability 
  • Good resistance to abrasion and wear 
  • Flexible and compressible 
  • Fire Safe 
Braided PTFE Packing

PTFE

Polytetrafluoroethylene is primarily used for its outstanding resistance to chemical attack, low coefficient of friction, high tensile strength and wide temperature range from cryogenic to + 260⁰C, and have a higher degree of molecular orientation allowing a significantly greater resistance to cold flow. PTFE packing can be used in valve and pumping applications and different versions are available offering added PTFE, Mineral or Vegetable Oil or Graphite lubricants enhancing properties such as rapid heat dispersion in high-speed applications or for difficult applications requiring sealing of aggressive chemicals or where non-contaminated packing is required.

Potential Benefits

 

  • High purity with outstanding chemical resistance
  • WRC Approved
  • Suitable for Food, Beverage and Pharmaceutical applications
  • Long life Valve and Pump sealing with minimum maintenance
  • Minimal wear on shafts and sleeves
  • Very low coefficient of friction
  • Suitable for Oxygen Service
  • FDA Approved
Braided ePTFE/Graphite: FG50 Packing

ePTFE/Graphite : FG50

This highly versatile product adds a new dimension to compression packing reliability and performance. Made totally from WL Gore & Associates’ highly developed GFO® yarn – combining the benefits of ePTFE, graphite and high temperature lubricants – this cross-plaited packing offers the ideal balance between density, resilience, strength and durability.

  • Extended service life – by up to 400% in harsh environments
  • Well proven with aggressive media
  • High thermal conductivity for cool running
  • Low coefficient of friction and minimal shaft wear
  • Very good start-up and emergency running characteristics
  • Non hardening

Typical applications are valves and pumps handling aggressive chemical media in the petrochemical, pulp and paper, power generation and metallurgical sectors – as well as potable water, and steam at up to 260°C (500°F).

    Braided Synthetic Fibres Packing

    Synthetic Fibres

    Braided synthetic packing is a general industry, commercial grade packing and will be an effective sealing agent in mild pump applications having low temperature and moderately low speed characteristics

    Potential Benefits 

    •  Economic but versatile
    • A general valve and static seal packing
    • Can be used upto 450⁰C
    • Easy to cut and install
    Aramid Fibres

    Aramid Fibres

    Having a very high tensile strength means that Aramid packing will handle all sorts of abrasive particles suspended in the pumping fluid

    This is a tough, high performance packing, cross-plaited from texturised aramid yarns impregnated with PTFE dispersion and a silicone based lubricant that resists chemical attack at high temperatures

    Aramid packing can also be spun over a hollow or solid central elastomeric core

     

    • Excellent abrasion resistance
    • Tough aramid yarn provides dimensional stability and resistance to deformation
    • Available lubrication ensures low friction to minimise shaft and sleeve wear
      Braided Hi-Temperature Packing

      Hi-Temperature Packing

      We have a family of products specifically designed to seal applications with extremely high temperatures. One variant, an extremely soft stable fibre, is manufactured from heat resistant fibres spun into a flexible yarn together with a low percentage of glass fibre and Inconel® wire reinforcement. This yarn contains no organic agents or processing additives and is capable of retaining its physical and chemical properties at very high temperatures.

      Alternatively, we have packings manufactured from fibrous form, inorganic refractory oxides – silica fibre with no metallic or ceramic content. This group of packings can be impregnated with high-temperature resistant additives incorporating proprietary, high temperature, graphite-based dispersion.

      In all, from this family group of packings we are able to offer;

      • Suitable for many high temperature duties up to 1000⁰C
      • Good chemical compatibility
      • Cost effective against normal ceramic packings
      • Resistant to wear and abrasion
      • Corrosion inhibitor safeguards metallic interfaces from galvanic corrosion
      • Thermally stable at high temperatures
      • Tough yet flexible for arduous duties

      For applications including;

       Autoclaves, Converters, Furnace, kilns and boiler doors

      • BOS plant
      • Vessel lid seals in steelmaking plant
      • Knife edge gate valves for valve bonnet sealing
      • Ash slurries, chemical slurries, hot air, dry gases, superheated and saturated steam
      • Valves and centrifugal pumps
      • Exhaust systems
      • Valve stem sealing systems
      Specialist Hybrid Packings

      Specialist Hybrid Packings

      These are available using many different material structures and manufacturing methods also combining the addition of selected lubricants. One variant may have a central core of temperature resistant elastomer with tough aramid fibres at the corners to resist abrasion and PTFE/Graphite yarn at the centre of each side to dissipate heat and present low friction.

      Another variant may have aramid yarn again at the corners, PTFE yarn at the faces and a strong core of extruded and expanded PTFE cord.

      These specialist combination packings are designed to cope with specialised duties and in difficult applications, maybe where high stresses are involved.

      • Excellent abrasion resistance
      • Excellent extrusion resistance
      • Low shaft wear
      • Superior compression and recovery characteristics with out of true shafts and spindles
      • Dense construction offering excellent sealing properties
      • PTFE faces providing low friction

      PTFE core provides resistance to high working pressure

        Contact Us
        close slider

        Your Details

        Let us know how to get back to you.


        How can we help?

        Feel free to ask a question or simply leave a message.