UNAFLEX®
"SUPREME" Style 189 Lightweight Rubber Expansion Joints are available in
round, or rectangular, with arch configurations. They are recommended
for pressure and limited vacuum applications such as air, gas and water
service where pressures are slight and duty not severe.
They feature a
lighter wall and flange thickness to provide extreme
flexibility. Their duck plies are reinforced with steel rings.
Style 189 Joints
are also available for temperatures up to 500ºF
and can be made with sleeve ends.
Max operating
pressure for all sizes is 25 psi internal pressure and 1.5
inches of mercury vacuum.
DESCRIPTION:
UNAFLEX® "SUPREME" U-Type Expansion Joints form a flexible
connection between equipment outlet and inlet flanges. They are normally
constructed of a natural rubber tube, several heavy plies of rubber or
neoprene - impregnated fabric, and neoprene cover to protect the
carcass. Maximum operating temperature is 180ºF, and the carcass will
withstand full vacuum to 25 psi. They are available in the following
configurations:
RECTANGULAR (STYLE 145) with internal
flange (no arch) for vacuum and pressure. They allow ample axial and
lateral movement capable of withstanding 30 inches of vacuum, or 25 psi
gauge internal pressure. Retaining flanges are provided for support.
OVAL (STYLE 155 AND 157 ) With
external flange available in Style 155 for vacuum only and Style 157 for
pressure and vacuum. Used in installations where external bolting is
desired. Style 155 withstands 30 inches of vacuum with standard flat
steel retaining rings Style157 is designed for both 30 inches of vacuum
and 25 psi gauge internal pressure and is designed with special steel
fabricated support rings.
ROUND (STYLE 156 AND 185)
lightweight rubber expansion joints available in Style 156, "U type, no
arch, steel reinforced for vacuum and pressure. Style 156 body is of
duck and rubber without metal reinforcing. Style 185 is constructed with
steel reinforcement. These units can also be supplied with offset
features.
