The grooved pipe joining method -- which dramatically reduces the amount of installation time as compared to welding, threading or flanging -- is now used extensively in a variety of piping applications.
Victaulic grooved products comprise a complete system: rigid and flexible grooved couplings, grooved accessories (such as grooved strainers and grooved suction diffusers), grooved valves, grooved fittings and grooved adapters, gaskets and grooving tools and accessories.
If we are dealing with a drilled and grooved cover, it becomes almost impossible to get reproducible results because of the difficulties in accurately positioning the ball.
A drilled and/or grooved cover will "act" softer than a plain cover.
The insertion force is much less for the helical grooved pin than for the other pins tested.
In the comparison pictures, the knurled and standard grooved pins clearly show signs of damage from installation as the bottom halves of the expanded diameter have been skived off.
Since the end of the 1950s, extensive research on grooved feed extruders has been carried out [3-7].
Geometrical elements of the grooved feed section are changed by modifying the grooved sleeve.
During the years that followed, several advances were made in grooved feed extruder technology.
Today, the grooved feed single screw extruder is widely accepted in Europe for high molecular weight polyolefin applications such as the extrusion of films, pipes and blow molded articles.
A grooved feed section improves solids conveying and increases extruder pumping action, thereby raising output at a given extruder rpm, reducing energy put into the polymer, and lowering melt temperature.
Grooved feeds debuted in Europe in the l950s, so European processors have had plenty of time to adapt the technology to most applications, both where it has advantages over smooth bore and where it doesn't.
As was reported in June, Exxon's Erderly found that the company's plastomer gave as much as 50% lower output/revolution than did standard LLDPE with a grooved feed.
Battenfeld Gloucester, which supplies both grooved and non-grooved extruders, agrees with Exxon's Erderly in recommending a 0.
Another spreader roller is the grooved
metal idler roll, which is frequently used for tracking as well.