• Greatly improved seed placement
• 100% of air pressure is vented, for precision low-velocity seed drop
• Allows higher fan speeds to reduce hose blockages*
• Quick visual indication of boot blockage
  
• Better seed distribution along the length of row

Download Mounting Instructions

Download Tuning Your D-Cup Diffuser

While air drills offer tremendous advantages in terms of capacity and acres per day, the added velocity of seed often creates substantial problems with more seed bounce—causing many seeds to be misplaced (i.e., not at the bottom of the furrow), and therefore in a poor position for germination. The exciting new D-Cup Diffuser gives you the best of both worlds: High capacity plus precision!

Most openers were intended for low-velocity gravity-feed, not the high speeds of today’s air carts. Nor do most designs provide any method for relieving the air pressure other than as the air stream carrying the seeds exits the opener—carrying them right on out of the furrow!

The problem is two-fold: more velocity on the seed creates more bounce (which generally isn’t easily ‘contained’ by the opener blade/boot/tube and furrow sidewalls), plus the pressurized air itself can carry seed out of the furrow as it escapes into the atmosphere upon exiting the bottom edge of the boot/tube. This is a common problem especially on the JD 50, 60, and 90-series single-disc openers, on CNH’s SDX drill, on the Borgault single-disc, as well as for many other disc and shank seed openers that are fed by a pressurized air stream.

The resolution is at hand, with the D-Cup Diffuser, which offers much greater venting of air than some other “air brake” designs, and is proven to be simple and highly effective. The D-Cup Diffuser is quite helpful for both small and large seeds and doesn’t have any internal screens or deflectors, which are prone to blockages and can damage seeds during impact. Overall, the D-Cup Diffuser makes air-seeding systems easier to use and more capable of delivering fast and consistent germination results.
 
For more information, and to enter a monthly drawing to win 10 of the D-Cup Diffusers, sign up for a Free Air Seeding Guide.

* On JD 1900-series air carts, use the lowest fan setting practicable, to help seed flow uniformity.