Reduced Pressure Tester

Overview

Whenever degassing is a requirement of the melting process, it is desirable to verify the effectiveness of the degassing process. Palmer supplies a simple, easy to use partial pressure test unit for this verification.

To use, the operator warms a sample cup, dips the cup into the furnace for a metal sample, quickly places the sample into the vacuum chamber, and starts the vacuum pump.

The aluminum solidifies under a vacuum causing any entrained hydrogen gas bubbles to expand greatly. Once solid and cooled, the sample is cut in half and compared to the chart below for gas level analysis.

GENERAL SPECIFICATIONS

• Air Motor – ¾ HP Variable Speed
• Body Size 8 ½” x 11”, Suspension Hook 11” above body
• Degassing Unit – 25 lb
• 24” and 36” one piece rotary lances available
• Degassing Capability – 50 to 3,000 lb aluminum melt
• Customer Requirements – Compressed air source (90-100 psi), inert gas source (dry nitrogen, argon, or proprietary dry gas) NOTE: Not for use with chlorine gas
• Optional Leg Assembly – 52”W x 17”H, 12 lb

Degassing Time – Approximately 5 to 15 minutes depending upon crucible size and melt conditions