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Dresser Couplings

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Dresser couplings are the original and best compression type pipe joining device. Allowing slight misalignment, vibration, expansion and contraction with a very simple and rapid installation process. If you can do up a nut and bolt you are capable of installing a Dresser coupling.

Dresser-couplings-diagram

The basic Dresser Coupling is made up of a central ring and one follower ring at each end, in between the central ring and these follower rings sits a gasket. The central ring is flared so the tapered gasket sits within the flare. Long carbon steel bolts run the length of the coupling connecting to both following rings. The flat backend of the gasket is compressed together by sequentially tightening the bolts that pull the two follower rings closer together creating a pressure seal of up to 1500 PSI.

Rage of Dresser Couplings

There is a huge range of Dresser couplings available from Anode Engineering, mainly divided by seal only models or seal and restrain coupling models which seal and stop pipe pullout. The couplings can also be electrically insulated or non-insulated allowing D.C. current to flow for Cathodic Protection (CP) systems.

 

Dresser-gasketThe gaskets used in Dresser couplings are specific to the product being transported within the pipeline. They come armored or non-armored with the difference being that the armored gasket features a metallic spring which conducts electricity to allow CP current to flow between the pipes. The non-armored gaskets will allow pipes of dissimilar metals to be joined or prevent CP current flow. Following is a list of gasket materials and their common uses:

  • Buna N Grade 42- Nitrile- Max 100˚Celsius. Mainly used for oil, hydrocarbons, condensates and gasolines.
  • Buna S Grade 27- Max 100˚Celsius. The most widely used gasket material for fresh and salt water, natural gas, air, alkaline solutions and some refrigerants.
  • Viton/ Fluorocarbon Max 176˚Celsius. Good for alcohols, organic acids, nitrogen compounds, vegetable oils and greases.
  • Butyl- Max 250˚Celsius resistant to hot air, steam, hot water, aqueous solutions.
  • EPDM- Max 150˚Celsius- resistant to Ozone, Oxygen, hot water, glycols, hydraulic fluids, ketones and alkalines.
  • High temp- Max 650˚Celsius- asbestos replacement for high temp and abrasive atmospheres.

Anode Engineering have years of experience ensuring you receive the correct model to suit your precise requirements.

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Find out more about Dresser Couplings

    Various styles of Dresser couplings

    • Style 38

      The original simple bolted pipe coupling providing flexible leak proof connections to 900 PSI.

    • Style 62

      Reducing- connects different sized pipes via a reducing central ring or thicker gasket.

    • Style 131

      Dismantling joints dual flange ended coupling which allows for length adjustment to meet another flanged join- pump, valve etc.

    • Style 88

      Compression Coupling, made for copper tubing compatible with Style 65 with insulating adapter.

    • Style 90

      Insulated restraining coupling for max 300 PSI- higher pressure alternative to style 65.

    • Style 39

      As per Style 38 providing electrically insulated coupling.

    • Style 40

      As per Style 38 with a longer body for pipes up to 60cm apart.

    • Style 31

      Line Caps- for capping the end of a pipe run.

    • Style 128

      Flange Adapter ideal for connecting pipes to a flange on a pump.

    • Style 63

      Expansion joints provide for up to 250cm of expansion contraction.

    • Style 65

      Compression coupling, max 150 PSI- plumbing and light industrial.

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