Applications

• Recommended applications of these fittings are: concrete pump hose; plaster and grout hose; oil suction and discharge hose; multi-purpose heavy duty air hose; jetting hose; barge loading hose and bottom loading hose.

Use

• For use with Internal Expansion Ferrules

Features

• Internally expanded couplings are essential when maximum flow of media is important.
• Reduces turbulence through hose
• Excellent sealing and retention characteristics
• Outperforms band clamps
• Easy and consistent installation
• Only one expansion tool is needed for each ID.

Safety notes

• Dixon 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 Dixon Holedall products.
• Do not use a wrench or vice on ferrule
• Holedall couplings; regardless of coupling style; are never to be used for steam service at any pressure.
• Holedall fittings are not to be used with cable reinforced high-pressure hose; 4 or 6 braid wire hydraulic hose or any other service not listed in the recommendations. 
• Strict adherence to ferrule OD range (Internally Expanded) for each hose end to be assembled is essential for satisfactory performance.
• Internally Expanded Holedall Couplings are not to be used with plastic lined chemical hose.
• Hose service working pressure (including surges and spikes) is never to exceed the maximum recommended working pressure for the fitting. The assembly's (hose + coupling) maximum working pressure is the lesser of the hose rated working pressure or the coupling rated working pressure.
• Media being transported through the hose should be compatible with the stem material. Compatibility of ferrule material with the environment in which it will be used is recommended. 
• Maximum pressure rating recommendations are given at 70°F /21°C.