Valve Gate Systems | Valve Gating

All MDi Valve Gate systems are built with MDi’s exclusive adjustable valve pin feature. These systems are built to be maintenance friendly with our advanced “any valve pin in any location” feature. Valve pin adjustment and/or replacement is no longer a molder’s nightmare.

Ask us about our PET VG option.

Product Features

  • Interchangeable pins: “any pin in any location”
  • Compact stack height
  • Wiring is internal and protected
  • Pins, pistons, and seals are accessible without having to split the plates apart
  • Pneumatic controlled pins
  • Low maintenance with reduced down time
  • Simple tools included with Valve Gate Systems
  • MDi designs improve molders’ production times


Parts made with valve gating usually have the least frozen-in stress, without any sprue, and no visible defects. Valve Gates can yield consistent shot-to-shot repeatability, faster cycle times, good automatic mold operation and better part quality. Valve Gated molds are therefore, ideal for automated high volume production.

MDi also designs and builds Valve Gate Stack systems, thus doubling capacity without a need to increase the size/tonnage of your press.

We also offer Single-Cavity Valve Gate systems with only one drop for production or prototype applications. MDi’s Single-Cavity Valve Gates feature the same gating technology used in our multi-cavity Hot Runners.

MDi offers high quality, high performance systems that are durable, dependable, competitively priced and feature MDi’s innovative nozzle and manifold technology.

Hot Runner Systems made in U.S.A

MDi is a world-leading American manufacturer of Hot Runner systems and components with the capability to develop custom and innovative solutions for plastics Injection Molding. Established in 1984, MDi continues to offer experience in the design and manufacturing of complete, internally heated and balanced precision Hot Runner systems, Valve Gate systems, Sprue Bushings, Molding Machine nozzles, Filters, and MDi’s unique system products and controls. All of our components are in-house designed and manufactured in our facility at St. Charles, IL, with a focus on quality and reliability.