Expansion Joint Components0 pages

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Expansion Joint Components

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Tube

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■ Synthetic or natural rubber forms seamless, leak-

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proof lining

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■ Extends fully through bore to outer flange edge

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■ Common materials include chlorobutyl, neoprene,

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natural rubber, EPDM, Viton* and Hypalon*

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Body or Carcass

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■ When wrapped or plied, reinforcements provide sup-

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port and flexibility between tube and cover

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■ Fabric reinforcement: polyester or other suitable

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fabrics impregnated with specified elastomers

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■ Metal reinforcement: bonded rectangular steel rings

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exclusive to Garlock, or continuous strands of wire

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and round steel body rings

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■ Metal reinforcement rings provide longer service life,

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extra safety protection, and extra rigidity, allowing

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higher pressure ratings

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Cover

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■ Homogeneous layer of synthetic or natural rubber

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■ Chlorobutyl is standard; other elastomers available

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to meet your specific applications

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■ Rubber or other weather-resistant coating protects

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carcass from corrosion or damage

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Metal Retaining Rings

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■ Must be used in all applications; provides metal sur-

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face to distribute bolting pressure equally, prevent-

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ing flange damage during bolt tightening

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■ Install against external flange surface

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■ Standard material: mild steel with corrosion-resistant

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coating; galvanized or stainless steel also available

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■ Available in 304/316 stainless steel; also: titanium,

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Hastelloy C**

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■ Special metal liner configurations also available for

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reducing or multiple arch design. Contact Garlock.

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Metal Flow Liner Installation

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Control Units

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■ Recommended on most applications to prevent

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damage due to excessive pipe movements

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■ Consists of two or more tie rods connected between

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pipe flanges

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■ Triangular end plates (gussets) have two holes for

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bolting securely to flange, and one hole to accom-

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modate the connecting tie rod

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■ Spherical washers are incorporated to accomodate

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moderate piping alignments, but also assists with

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angular, torsional and lateral movements

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■ Each rod incorporates double nuts on each end to

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keep the expansion joint from over-elongating

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■ When excessive axial compression is a concern,

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compression nuts can be incorporated to restrict

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movements as needed and to protect the expansion

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joint from damage

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■ NOT designed to replace pipeline anchoring

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Metal Flow Liners

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■ Extends service life by providing protection from

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abrasive materials or solids, especially in high veloc-

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ity applications

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■ Flanged at one end, installed at the head of the flow,

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tapered to a 5° angle, allows lateral deflection

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■ Liner flange thickness: 10 gauge

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Liner body thickness: 12 gauge

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Compression Nuts

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Control Unit Rod (Optional Feature)

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Retaining Gusset Plate

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Spherical Washer

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Expansion Joints

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Standard Pipe Flange

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Typical Control Unit for Rubber Expansion Joint

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