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Hose Coupling
Systems
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DPL418
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Holedall: Externally Expanded
Holedall
™
External Swage Coupling System
The Holedall™ coupling system provides outstanding strength, durability and safety.
The Holedall™ system is a method of attaching couplings to hose utilizing a progressive swage. The patented Holedall™
couplings include a Holedall™ stem and a specially engineered ferrule. The hydraulic swaging of the coupling to the hose
is accomplished by pushing the ferrule through a die which reduces the ferrule OD, thus providing a 360° uninterrupted
compression band around the hose.
A hydraulic ram is the only piece of machinery necessary to accomplish the coupling. Available in five different sizes - 15, 25,
50, 100 and 350 ton see page 85 - these rams will accommodate dies and pushers of various sizes so that hoses up to 10" in
diameter may be coupled.
This multi-purpose, high pressure coupling system requires no bolts and results in a clean coupling with no protrusions. The
swaging operation is fast and hose of various lengths and different styles can be coupled. Ease of operation, flexibility and
economy make the Holedall™ method an unequalled assembly system.
Features:
•
provides long-lasting efficiency and safety
•
lightweight coupling consisting of ferrule and stem
•
streamlined, no protrusions to snag on equipment
•
available in stainless steel and carbon steel
•
available in multiple configurations: pipe thread, plain end, grooved or flanged ends
cross-section of Holedall™ externally swaged assembly
displacement of hose carcass
into flared portion of coupling
traps and seals hose end
ferrule
stem
hose ID
do not use wrench or vice on ferrule
Holedall™ stems and ferrules are specifically designed to be used together as a coupling system. Due to differences in
dimensions and tolerances, for safety reasons, do not use other manufacturer's stems or ferrules with Holedall™ products.