BPMA

Range
Expendables
Subtitle

Corundum material

Description

Product only used for orifice rings when a zirconia-free product is requested.

Chemical and physical properties

Typical chemical composition

 
 

Typical crystallographic analysis

Main phase: 

  • corundum

Physical characteristics

Description International standards British standards
Typical bulk density for orifice rings 2.77g/cm3 173pcf
Open porosity for orifice rings 20% 20%
Coefficient of thermal expansion 7.5 10-6K-1 4.1 10-6°F-1
Thermal shock resistance good good

 

Typical application

  • orifice rings

BPMA is recommended for sodalime container glass and flask tableware.

Related products

Expendables

333

Bonded AZS with 10% zirconia

333 is adapted for most of the standard feeder expendable applications.

Expendables

ZA33 HR

Bonded AZS with 10% zirconia

ZA33 HR is dedicated to all applications where longer life and better thermal shock resistance is needed versus the standard 333 solution.

Expendables

ZIRAL 61

Bonded AZS with 20% zirconia

ZIRAL 61 is recommended for all applications in feeder expendables, and for superstructures where high corrosion resistance is required.

Expendables

R 220

Fireclay-based luting cement to seal the gap between the orifice ring and the spout

Easy and fast preparation and positioning (5 to 10 min preparation).

Expendables

R 298

R 298 is a refractory-based anti-adhesive powder

Anti-adhesive cement for easy removal of the orifice ring.

Expendables

ORIFICE RING POWDER

Alumina-based granular insulation powder

ORIFICE RING POWDER fills all the spaces between the orifice ring and its holder. The powder has a higher thermal inertness than insulation fibers.