The Check Ring is where the wear usually happens, but the Z4 4-piece screw-tip valve withstands the harshest conditions.

Injection molding can be a tough business. Harsh realities can't be avoided; however, they CAN be controlled. While other screw-tip valve makers will tell you different, Don Zeiger knows the harsh truths:

Their valve assemblies can't take the heat. His can!

Their valve assemblies can't take the abrasion. His can!

Their valve assemblies can't take the friction. His can!

Their valve assemblies can't take the corrosion. His can!

Don likes it hot.

Don Zeiger's Z4 4-piece screw-tip CAN take the heat, the abrasion, the friction, and the corrosion - no sweat, because Don makes the ultimate valve assembly for the most demanding applications - like YOURS!

There are 4 essential reasons the Z4 beats all others:

  1. Better STEEL
  2. Better TEMPERING
  3. Better DESIGN
  4. Better RESISTANCE

Let's look at each in more detail:

  1. Better, high-speed steel - The wear parts of Don's valve assembly are made from the highest grade of high-speed steel. Hardened, molybdenum-based steel hardened to 62RC maintains its hardness. NO breakdown and NO failures, unlike all of those products using inferior steels.
  2. Better processing for tempering to withstand higher temperatures - The other guys just don't get it. Friction creates heat and high temperatures lead to product failure. If they understood the physics and the chemistry of the injection molding process, that would help them immeasurably. The Z4 withstands higher temperatures in excess of tempering, 1100º F, retaining a Rockwell Hardness of 62 - THE HIGHEST STANDARD IN THE INDUSTRY. This isn't just a little better; it's up there with cutting tool strength, so it's up to the harshest ultra-high-speed applications.
  3. Better designed, easy sliding Front Seat reduces friction - Wanna lessen the adverse effects of friction? Start by creating less friction in the first place! A valve assembly's wear parts, the Check Ring and the Front Seat, work together, so it's a big deal that Don designed a way to mill and rotate the companion Front Seat so it slides easier. Less friction ? less heat ? more able to handle higher temperatures. Pure and simple.
  4. Better fashioned to resist abrasion and corrosion - Abrasives are enemies. Throw materials like glass into an injection molding situation and you're looking at trouble - IF you use inferior metals. Abrasives will cut, scrape, grind, and scratch their surfaces. Not the Z4's. Moreover, corrosives can be just as bad if you're using lesser quality steels (and you ARE if you're not using the Z4). Just look at hot saline. It attacks an ordinary steel, because it's an active solution that is naturally corrosive. Simple chemistry told Don Zeiger to make his Check Ring stand up to what's naturally there. And, naturally, he did.
Here's the Check Ring checklist:

The Z4 is infinitely adjustable for specialty resins, applications, and process improvement at no cost to the customer. Better steel and better processing makes for the ultimate performance under the most demanding injection molding circumstances.

  • as one of the wear parts of the valve assembly, it's specifically made to reduce and withstand the harshest conditions
  • molybdenum-based steel hardened to 62RC to maintain hardness and elevated temperature conditions
  • tempered to withstand higher temperatures caused by friction (in excess of tempering, 1100º F) to retain a Rockwell Hardness of 62, the highest standard of the industry
  • this is high-speed tool steel with high red hardness, so under high heat conditions ("red hot") it doesn't lose its hardness EVER
  • cutting tool strength-equivalence and perfect for ultra-high-speed applications
  • very good wear resistance and good corrosion resistance
  • a better seal, positive shut-off, and superior shot control (all from Zeiger's exclusive "zag-edged" Rear Seat contact design of carefully mismatched angles that optimize adjustments for natural inconsistencies and contaminants)
  • LIFETIME WARRANTY ON STAINLESS STEEL 17-4 RETAINER & 100% CUSTOMER SATISFACTION GUARANTEE ON EVERYTHING!


Take a closer look at the Z4's ultimate performance
Add zip to your injection molding process and get in the zone with the BEST-IN-CLASS Z4 4-piece screw-tip valve from Zeiger Industries.

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. 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
  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
© 2017 Zeiger Industries, Inc.      4704 Wiseland Avenue SE, Canton, OH 44707
800-932-9120 x209 | Request a FREE Consultation