Equatemp®Dual Zone Sprue Bushings

Equatemp® Sprue Bushings

The automotive industry faces a major problem with processing materials at high temperatures. MDI recognized this issue, and after intensive research and development to address this problem came up with a revolutionary Dual zone hot sprue bushing. A robust and integrally heated hot sprue bushing with 2 zones provides the customers with ultimate temperature control and uniformity. This bushing has been meticulously designed for applications that demand a higher precision specially catering to the automotive industry.

Equatemp®Dual Zone Sprue Bushing Features

  • High purity ceramic insulator compacted to its near theoretical limits insures highest heat transfer rate, resulting in longer heater life
  • Predetermined wattage distribution, provides even heat along its entire body resulting in better melt flow
  • Each zone responds to any heat drain instantly without affecting the other, thus avoiding overheating or freeze-off problems
  • Advantageous when high temperature engineering resins are being processed
  • Constructed out of H-13 tool steel
  • Heat treated up to 35Rc

The flexibility in the design insures an answer to any of your special needs.

Equatemp®Dual Zone Sprue Bushings

Equatemp®Dual Zone bushings are offered in two sizes.


Ø3/4" Dia (Small)

Topless Tip

The most common tip which is designed for excellent cosmetic gates

Rb10T

Full Body

The gate geometry is machined in the end cap while allowing good gate vestige

Rb10F

Sprue Type

A replaceable tip for feeding runners

Rb10S

Ø1" Dia (Medium)

Topless Tip

The most common tip which is designed for excellent cosmetic gates

Rb10T

Full Body

The gate geometry is machined in the end cap while allowing good gate vestige

Rb10F

Sprue Type

A replaceable tip for feeding runners

Rb10S

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.