Description of operation
The blast hose must be cut squarely and cleanly. The nozzle holder is installed with the screws provided. These screws penetrate the outer wall, but not the inner wall of the blast hose.
In operation, the air pressure inside the blast hose helps hold the nozzle holder securely in place.
A nozzle washer must be placed on the shoulder inside the nozzle holder to prevent premature wear and failure, of both the holder and the nozzle, from high-speed abrasive.
Tongbao cast steel quick couplings attach to the end of any properly sized blast hose using screws provided.
The hose must be cut squarely and cleanly. The screws should penetrate the outer layer of the blast hose without perforating the inner tube.
In operation, air pressure inside the blast hose helps hold the hose tight against spiral ribs inside the coupling.
Using a quarter turn, the blast operator connects the quick coupling to any other quick coupling or quick coupling nozzle holder.
A built-in lock-spring on the coupling keeps the couplings securely connected.
All blast hose coupling connections should be secured with safety cables.
• Cast steel material springs back from most impacts that would dent or deform metal couplings
• Built-in lock-springs eliminate need for safety pins
• Injection molded for precise dimensions, ensuring positive fit
Same diameter sand pipe coupling
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