Refractory Spouts with Wear-Resistant Inserts

As glass container manufacturers struggle to maximize production and limit downtime, one constant that they cannot escape is the annual spout change.

Refractory spouts funnel the molten glass to the orifice ring in order to form the gob.  They mate with the tube so that the flow of glass can be stopped when the orifice ring must be replaced.  The spout is a critical component in the glass feeder system.

Most traditional refractory spouts last for approximately one year.  As the glass pours through the throat, the refractory is eventually eroded away to the point when the tube will no longer seat properly against the spout, and the flow of glass can no longer be stemmed.  The best means to address this issue, and thus significantly increase the useful life of the spout, is to use a denser material that will better resist the constant erosion.  Dense materials tend to be very poor in thermal shock, if the entire spout was made of such material, then the heat-up of the spout would have to be very slow to prevent cracking.  A more practical solution is to use a traditional refractory for the spout body, and insert a dense material into the throat.  Emhart Glass now offers its full line of refractory spouts with inserts made of either isostatically pressed zircon mullite, isostatically pressed chrome oxide, or fused cast AZS (alumina zirconia silica).

All standard Emhart Glass spouts are available with all three insert materials.  Emhart Glass metering spouts are only available with chrome oxide or fused AZS inserts.  To order, select the part number of the appropriate spout and the give us the desired spout insert material.

To select the part number please visit our on-line refractory catalogue at:

Features & Benefits

  • Spout Refractory Life increased by 1 ½ to 2 ½ times versus traditional spout
  • Reduced Down-Time due to less frequent spout changes
 515 Metering Spout with a Chrome Oxide Insert
 503 Standard Spout with AZS Insert