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PARR Instr. Moline

Acid Digestion Bomb 23 & 45 ml - General Purpose - Model 4744

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chemical@analis.be
++(0)9 243 77 10
QUOTATION
INFORMATION
chemical@analis.be ++(0)9 243 77 10
DESCRIPTION SELECTION GUIDE
DESCRIPTION
PARR 4744 General Purpose Acide Digestion Vessel 45 ml , 250 °C, 1800 psig

This is a 45 mL modification of the 23 mL, 4749 PTFE lined vessel for users who want additional capacity in this popular model. It is made with the same closure as the 23 mL vessel, using a similar thick-walled PTFE cup, 3-3/4 inches deep inside, with a broad flanged seal. Safety blow out protection is provided with a rupture disc that will release pressure through an opening in the cover. Its maximum temperature and pressure ratings, 250°C and vessel 1800 psig, are the same as for the 4749 Model. The 4744 Vessel is sealed by turning the screw cap down until it is hand tight, then tightening the cap not more than one-eighth turn with a hook spanner. The spanner and holding fixture required for this operation are the same as used with the 4749 Vessel. These accessories must be ordered separately

PARR 4745 General Purpose Acide Digestion Vessel 23 mL, 150 °C, 1200 psig

This is the original acid digestion vessel introduced by Parr in 1969 to provide a PTFE lined metal vessel of simple design and minimum cost that can be used safely for routine sample preparation purposes. Its wide acceptance over the intervening years has proved it to be an excellent design for general digestion procedures in which temperatures and pressures are held below 150 °C and 1200 psig. It can be used occasionally above 150 °C, but at elevated temperatures it becomes increasingly difficult to maintain a tight seal. This vessel does not have a safety rupture disc, but it is designed so that the bottom plate will shear out and release the charge if the vessel pressure should exceed 7000 psig. This  weak link' design, while effective in preventing a lateral burst which might injure a bystander, is not an adequate substitute for a frangible rupture disc as provided in other Parr designs. For this reason, the 4745 Vessel is not recommended for experimental procedures in which explosive pressures may be generated.

SELECTION GUIDE
PARR Instr. Moline website
PARR Instr. Moline
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Prices are quoted in euro (taxes excluded) and apply in the Benelux (recycling fee included). They are subject to change without notice. We reserve the right to adjust pricing errors and to limit quantities.

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