Orifice Rings Spouts Stirrers & Rotor Segments
Plungers Spout Assemblies Spout Insulation & Cements
Tubes Metering Spout System Forehearth Maintenance

Plungers
Improved Gob Shaping Material Specifications
The formulation and manufacture of expendable refractories has become increasingly important as demands on the feeder have increased.

Emhart Glass 333, a zircon-mullite material, has been demonstrating excellent wear characteristics when used for refractory plungers. The material is an ideal solution for today’s more aggressive production environments with higher pull rates.

  333 345
 
ZrO2 11.2 0
SiO2
14.2 16.5
Al2O3
74.0 82.6
TiO2 0.12 0.24
Fe2O3 0.2 0.27
CaO 0.04 0.03
MgO 0.01 0.02
K2O 0.06 0.07
Na2O 0.15 0.2
Other 0.02 0.07
Modulus
of Rupture (psi)
2250 2150
Bulk Density (g/cc) 2.97 2.67
Apparent Porosity (%) 17 17.5
PCE 34 39
Thermal Expansion
(in/in/°F)
3.5x10-6 3.0x10-6

Note: Data shown is subject to
normal deviation.



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