Page 53 - GarlockFluidSealing2010

B-21
Expansion Joint Components
Tube
¦ Synthetic or natural rubber forms seamless, leak-
proof lining
¦ Extends fully through bore to outer fange edge
¦ Common materials include chlorobutyl, neoprene,
natural rubber, EPDM, Viton* and Hypalon*
Body or Carcass
¦ When wrapped or plied, reinforcements provide sup-
port and fexibility between tube and cover
¦ Fabric reinforcement: polyester or other suitable
fabrics impregnated with specifed elastomers
¦ Metal reinforcement: bonded rectangular steel rings
exclusive to Garlock, or continuous strands of wire
and round steel body rings
¦ Metal reinforcement rings provide longer service life,
extra safety protection, and extra rigidity, allowing
higher pressure ratings
Cover
¦ Homogeneous layer of synthetic or natural rubber
¦ Chlorobutyl is standard; other elastomers available
to meet your specifc applications
¦ Rubber or other weather-resistant coating protects
carcass from corrosion or damage
Metal Retaining Rings
¦ Must be used in all applications; provides metal sur-
face to distribute bolting pressure equally, prevent-
ing fange damage during bolt tightening
¦ Install behind and against inner face of each fange
¦ Standard material: mild steel with corrosion-resistant
coating; galvanized or stainless steel also available
Metal Flow Liners
¦ Extends service life by providing protection from
abrasive materials or solids, especially in high veloc-
ity applications
¦ Flanged at one end, installed at the head of the fow,
tapered to a 5° angle, allows lateral defection
¦ Liner fange thickness: 10 gauge
Liner body thickness: 12 gauge
¦ Available in 304/316 stainless steel; also: titanium,
Hastelloy C**
¦ Special metal liner confgurations also available for
reducing or multiple arch design. Contact Garlock.
Metal Flow Liner Installation
Control Units
¦ Recommended on most applications to pre-vent
damage due to excessive pipe movement
¦ Consists of two or more tie rods connected between
fanges
¦ Triangular end plate has two holes for bolting plate
securely to fange, and one hole to accommodate
plate connecting tie rod
¦ Rubber washer between plate and rod substantially
reduces both noise and vibration
¦ Installing pipe sleeves over tie rods provides addi-
tional protection against overcompression damage
¦ NOT designed to replace pipeline anchoring
Control Unit Installation
Retaining
Ring
Expansion
Joint
Pipe
Flange Control
Unit
Assembly
Optimal
Compression
Sleeve