Description
Parr Instruments® Model 4749 General Purpose Acid Digestion Vessels, 23 mL, Parr Instruments, 4749
Features:
- Model 4749 is 23 mL, general purpose acid digestion vessel, similar to original 4745 model but modified for use at higher temperatures and pressures, and provided with safety blowout protection as well
- Operating temperatures and pressures up to maximum of 250 °C and 1800 psig are permitted in vessel using a thick-walled PTFE liner with a broad, flanged seal
- Forces required to seal liner are developed by tightening vessel cap with spanner while holding vessel in special fixture
- Blow-off disc in vessel head is designed to blow out and release pressure through an opening in cover at approximately 3500 psig
- With its high temperature capability and blow-off disc this is an excellent vessel for all general digestion purposes, and particularly for experimental procedures in which behavior of reactants has not been well established
- One of original applications for these vessels, which continues to be one of their principal uses, is for digesting alumina samples at temperatures to 250 °C
- For this and other difficult digestions, Parr offers an optional tumbling ring (A284AC) that can be attached to vessel body
- With this ring in place, the vessel will roll smoothly when placed on a powered roller, thus providing convenient means for agitating charge during long digestion procedures