Dry Flask 250 mL, 5-Piece Set — DC401 Freeze Dryer

The Yamato 212821 is a 5-piece set of 250 mL dry flasks for the Yamato DC401 freeze dryer — the round flasks that hold pre-frozen sample and mount to the DC401's flask chamber or manifold for lyophilization. This is the 250 mL flask, the larger companion to the 120 mL dry flask (212820), for bigger batches per flask. It supplies five flasks to build or expand a flask-drying configuration on the DC401.

Key Specifications

Application Profile

Sample is pre-frozen as a shell on the inside wall of a dry flask, then the flask mounts to a port so vacuum draws vapor through the cap's glass joint into the DC401's −45 °C trap (see cold-chain-sample-storage). The 250 mL dry flask (212821) is the larger vessel option — more sample per flask than the 120 mL version, so bigger batches use fewer ports. Each flask pairs with a dry-flask cap (212570/212571) to seal onto a flask chamber (212560) or manifold. Supplied as a set of five.

Frequently Asked Questions

What is the 212821 for? Flask-format freeze-drying on the DC401 — pre-frozen sample is dried in the 250 mL flask under vacuum. A set contains five flasks.

How is it different from the 120 mL flask? The 212821 (250 mL) holds more sample per flask; the 212820 (120 mL) is the smaller option. Both mount the same way on the DC401.

What else do I need to use it? A dry-flask cap with glass joint (212570 straight or 212571 45°) and a flask-mounting chamber (212560) or manifold on the DC401.

Ordering & Configuration

add to your DC401 order. Confirm the flask volume (120 vs 250 mL), cap type, and the chamber/manifold you are loading. Add it to your DC401 quote to complete a flask-drying configuration.

DC401 dry flasks, by volume: the 212821 (250 mL) suits larger batches; the 212820 (120 mL) suits smaller volumes. Pair with a cap (212570/212571) and a flask chamber (212560).