Page 30 - CorrugatedCatalog110913Rev8LR

An interlocked hose or liner is often installed inside a corrugated hose assembly. The liner
commonly serves two purposes while still maintaining the full working pressure of the corrugated
hose. The frst is to protect the hose corrugations from excessive media velocities. Media
speeds can induce resonant vibrations in the corrugations, causing rapid fatigue and subsequent
fracturing of the hose wall. The liner provides a relatively smooth surface for the media and, by
avoiding the media impacting on the corrugation valleys, reduces the chances of harmonic
resonance. The second purpose for a liner is abrasion resistance. Even slightly abrasive media
fowing at medium-to-high speeds can cause premature wear of the interior surfaces of the
corrugated hose. The liner provides a smooth fow path, as well as a relatively thick layer of
abrasion-resistant metal between the media and the corrugated hose. The liner will also help
reduce pressure loss due to friction between the media and corrugated hose. Proper ft between
the hoses is essential for good performance. Because Hose Master makes both the corrugated
hose and liners, a perfect ft is assured.
Applications in which the corrugated hose is subjected to external abrasion, molton material
splash, or impact damage may require a protective armor or guard along all or a portion of its
length. A guard is typically made from interlocked or squarelocked metal hose and is welded to
the assembly. Note that the bend restricter has a bend diameter equal-to or greater-than the
corrugated hose it is protecting.
Liner
29
800 - 221 - 2319 • www. hosemas t e r. com
Armor/Bend Restricter