Composition
All basic
joints consist of:
- The
tube
- The
body or carcass
- The
cover
Their
composition is as follows:
The Tube
- Synthetic
or natural rubber protective, leakproof lining.
- Seamless
tube extends fully through bore to outer flange edge.
- Common
specified tube materials are of chlorobutyl, neoprene, natural rubber, EPDM,
Viton* and Hypalon*.
The Body or Carcass
- Fabric
reinforcement is polyester or other suitable fabrics impregnated with specified
elastomers.
- These
reinforcements when wrapped or plied provide support and flexibility between
tube and cover.
- Metal
reinforcement is achieved by the use of bonded rectangular steel rings exclusive
to Garlock. Garlock also uses continuous strands of wire and round steel
body rings.
- Metal
reinforcement rings provide longer service life.
- Metal
reinforcement rings provide extra safety protection.
- Metal
reinforcement rings supply extra rigidity allowing pressure rating increases.
The
Cover
- Construction
utilizes a homogeneous layer of synthetic or natural rubber.
- Rubber
coating protects carcass from corrosion or damage.
- Chlorobutyl
is a “standard” Garlock cover elastomer.
- Other
elastomers available to meet your specific applications.
- A thick
weather resistant coating is provided on most styles, offering additional
protection.
Metal
Retaining Rings
- Retaining
rings must be used in all applications.
- Installation
is behind and directly against inner face of each flange.
- Rings
provide a metal surface to distribute bolting pressure equally.
- Rings
prevent elastomeric flange damage during bolt tightening.
- Normal
ring material is mild steel with corrosion resistant coating.
- Galvanized
or stainless steel available on special order.
Control
Units
- Control
units consist of two or more tie rods connected between flanges.
- Control
units prevent damage due to excessive pipe movement.
- Units
are not designed as replacement for adequate pipeline anchoring.
- Additional
protection against over-compression damage may be controlled by installation
of pipe sleeves over tie rods.
- Each
control unit end plate is triangular with three-hole drilling. Two holes
bolt plate securely to flange. The final hole accommodates plate connecting
tie rod.
- Rubber
washer between plate and rod substantially reduces both noise and vibration.
- Garlock
recommends the use of control units on most applications.
*Viton and Hypalon are registered trademarks of DuPont.
