The Lee Betaplug® Expansion Plug is a pre-assembled,
one-piece, tapered expansion plug specifically engineered to seal fluid passages
in metal castings and plastic housings leak-tight, without the use of threads or sealants.
Controlled expansion during installation causes the lands and grooves on the O.D. of the
plug body to bite into the wall of the fluid passage, creating a leak-tight seal and assuring
retention. The unique tapered design eliminates the need for tight manufacturing tolerances,
and allows the designer to minimize the wall thickness required around the plug, even for
brittle housing materials.
Available Designs
The 6000 Series Betaplug is designed
for high pressure systems (up to 7,000
psi), and is available in 4, 5, 6, 7 and 8
mm diameters.
The Short Betaplug is designed for low
pressure systems, up to 500 psi, and
is available in 7, 9, 11, 13 and 16 mm
diameters.
LEE BETAPLUG ADVANTAGE
Precise Control of Boss Stress
Conventional, cylindrical shaped expansion
plugs require additional expansion for the
clearance between the plug O.D. and the
installation hole.
The matching tapers of the Betaplug and its
installation hole create a perfect fit, eliminating
the need for additional expansion. Since the
Betaplug’s expansion is precisely controlled
by the size of the tapered pin, the amount of
expansion and any resulting boss stress is
completely predictable.
The Lee Betaplug® Expansion Plug is a pre-assembled,
one-piece, tapered expansion plug specifically engineered to seal fluid passages
in metal castings and plastic housings leak-tight, without the use of threads or sealants.
Controlled expansion during installation causes the lands and grooves on the O.D. of the
plug body to bite into the wall of the fluid passage, creating a leak-tight seal and assuring
retention. The unique tapered design eliminates the need for tight manufacturing tolerances,
and allows the designer to minimize the wall thickness required around the plug, even for
brittle housing materials.