May 2017
Engineering Marvel #15

Rust is a worldwide problem. The US alone spends over $300 billion per year in prevention and repair. Imagine if inspectors had a way to look through solid concrete to detect corrosion. 
Thanks to a new imaging technique developed by researchers at the National Institute of Standards and Technology (NIST), they do. 

In This Issue

"If you keep your eye on the profit, you're going to skimp on the product. But if you focus on making really great products, then the profits will follow." - Steve Jobs
A Rotary Valve for Abrasive Materials?
Eliminate Wear and Reduce Abrasion

You've heard it before. Using abrasive materials in rotary valves is just asking for trouble. Rotor vane tips erode, creating gaps. Maintenance requires frequent replacement of rotors, bearings and wipers or, resurfacing and machining the vane tips. Removing an airlock from operation for the necessary service causes loss of production time and reduced profit. Valves often last six months or less before being taken out of service.

Meyer designed the new W.E.A.R. (Wear Elimination & Abrasion Reduction) Valve specifically to handle abrasive materials. Along with all White Iron cast designs, the product conveyed is matched with the most effective wear resistant coating for the valve internals. 

Coating options to extend the life of the rotary valve include:
  • Heavy Chrome
  • Diamond Chrome
  • Ceramic
  • Chrome Carbide 
The rotor is a closed end type, typically hard faced on all tip contact areas with Stellite and precision ground. The shaft packing area is purged through a lantern ring design for optimal life.

The W.E.A.R. valve design injects clean air between the headplate and the closed end rotor. Conveying air is diverted to each headplate cavity via an engineered orifice place. This keeps product from accumulating on the headplate interior surface area and secondly flushes material from between the closed end shroud area and headplate. The air is then re-introduced with the material back into the conveying system.

Meyer W.E.A.R. valves are available in sizes 6 through 14 with square or round housings to match most collector discharge flanges.

Common Service Conditions include:
  • Pressure Rating: Up to 15 PSI
  • Maximum Operating Temperature: 500°F
  • Materials: Abrasive or Hygroscopic

For more information, contact your local TEC Representative.

Technical Resources

Contact US

Steven Duke
Birmingham, AL
Bob Hodges
Covington, LA
Harvey Kinsey
Atlanta, GA
Lance Steed
Mobile, AL

TEC Engineering, 700 Century Park South, Suite 223, Birmingham, AL 35226
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