Want the most advanced 4-piece screw tip?
Rear seat's engineering delivers for you.

Don Zeiger is a perfectionist. Anyone who's used the gold standard of injection molding valves, the 4-piece non-return valve*, knows this.

Zeiger engineering designed it a better way, calculating just the right imperfection in mismatched angles so it can slip to adjust to the contaminates that inevitably come into play.

The result is the most advanced 4-piece screw-tip valve for best-in-class quality and The Ultimate in Performance made specifically for general injection molding operations.

Better steel, better processing:
  • Z4 Rear Seat is constructed entirely of D2 tool steel hardened to 60RC.
  • Corrosion resistant and abrasion resistant.
  • Good compression strength and resists denting.
  • Superior material quality compared to all others that use lower grade steel or cheap veneer nitrided steel.

Better seal, positive shut-off, superior shot control:

  • Exclusive Zeiger "zag-edged" Rear Seat contact seal design carefully mismatches angles to optimize adjustments and accommodate the natural inconsistencies inherent in any manufacturing process.
  • Unlike the standard matching angle design, the Z4 approach maintains control when contaminated material comes through.


Take a closer look at the Z4's ultimate performance

Call Andy Zeiger at 1-800-932-9120 x204 or email us for the ultimate Z4 screw-tip assembly performance!
Don's Never Never Land

  Never Never No. 1  

nitriding is like putting lipstick on a pig!

Nitriding is a cheap trick using a cheap veneer. The coating falsely raises the Rockwell rating, so your valve can be damaged beyond repair in two weeks! Don will NEVER nitride, ALWAYS using the right steel hardened right instead. LEARN HOW YOU CAN DECREASE DEFECTS
  Never Never No. 2  

Is a free-flow valve really free flowing?

We don't think so. Free-flow valves actually make a mess with burnt material left behind after each shot. Leakage. Labor. Downtime. Don will NEVER sell a free-flow and will ALWAYS use a full-flow valve instead. LEARN WHY OURS IS THE INDUSTRY STANDARD
© 2018 Zeiger Industries, Inc.      4704 Wiseland Avenue SE, Canton, OH 44707
800-932-9120 x209 | Request a FREE Consultation