Vacuum desiccator

Introduction

A vacuum desiccator is a laboratory container used for the storage and the drying of the moisture-sensitive materials under a vacuum, and it is used in the chemistry, the biology, the pharmacy, and the research laboratories for the drying of the samples, the storage of the hygroscopic materials, and the degassing. The vacuum desiccator consists of a glass or a plastic vessel with a lid, a vacuum connection, and a desiccant chamber or a tray that holds the desiccant, such as the silica gel, and it provides a sealed and a low-humidity environment, with the air removed by the vacuum, which accelerates the drying and the degassing; in operation, the samples are placed in the desiccator, the desiccant absorbs the moisture, and the vacuum is applied to the desiccator, reducing the pressure and the humidity, and the samples are dried and stored in the moisture-free environment; the vacuum desiccator is used for the drying of the samples after the synthesis, for the storage of the hygroscopic reagents and the samples, for the degassing of the solvents, for the removal of the moisture from the samples, and for many other applications, and it is available in various sizes, from the small desiccators for a few samples to the large desiccators, with features such as the vacuum gauge and the valve; the vacuum desiccator is an essential instrument in the laboratory for the moisture-sensitive work. Vacuum desiccators are used in the chemistry and the pharmacy laboratories, in the biology laboratories, in the research institutions, and for many other applications. With their vacuum and the low-humidity environment, vacuum desiccators are essential for the drying and the storage of the sensitive materials.

Vacuum Desiccator LVD-T2011

Vacuum Desiccator offers an inner diameter of 210 mm and an outer diameter of 270 mm for spacious storage. It features a ground-in stopcock that ensures an airtight seal and smooth vacuu...

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Vacuum Desiccator LVD-T2010

Vacuum Desiccator has a 400 mm inner diameter, providing ample space for moisture-sensitive samples. Its total height of 460 mm accommodates various laboratory applications. The perforat...

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Standards

Complies with the above standards, but is not limited to them.

Features

1. Vacuum desiccator for drying, degassing and storing samples under vacuum or inert atmosphere.

2. Sealed chamber with vacuum port, desiccant tray, and lid for low-humidity sample storage/drying.

3. Suitable for laboratory, pharmaceutical, electronics, material science and sample preservation.

4. Includes desiccator body, lid, vacuum gauge/valve, desiccant tray, shelves and manual.

5. Supports vacuum drying, inert gas purging, moisture-sensitive sample storage and degassing.

FAQ

Q1: What testing scenarios is this desiccator mainly applied to?

A: The vacuum desiccator provides a sealed, low-humidity (or vacuum/inert) environment for drying, degassing, and storing moisture-sensitive samples. Used in laboratories (drying hygroscopic chemicals/samples (salts, powders), storing moisture-sensitive reagents (Karl Fischer reagents, anhydrous solvents), cooling dried samples after oven (prevent moisture reabsorption before weighing - critical for moisture determination/Loss on Drying), degassing liquids/epoxies (remove bubbles under vacuum)), pharmaceutical (storing hygroscopic APIs/excipients, dry powder handling, stability samples), electronics (storing moisture-sensitive components (MSD - moisture sensitive devices per IPC/JEDEC J-STD-033), baking/drying PCBs before soldering), material science (drying polymers, powders, ceramics before analysis (TGA, FTIR, elemental analysis - moisture interferes)), and sample preservation (hygroscopic standards, reference materials). Types: standard (desiccant + vacuum port), vacuum (with pump connection, gauge), inert gas (purge with N2/argon), cabinet (large, multi-shelf). Materials: glass (lab standard, transparent), plastic (polycarbonate, lightweight), metal (stainless, industrial/vacuum).

Q2: What standards does the desiccator comply with?

A: Complies with ISO 17025 (lab equipment), ASTM standards for moisture determination (ASTM D280, E1064), IPC/JEDEC J-STD-033 (moisture-sensitive devices), USP (pharmaceutical drying/loss on drying <731>), and GB/T standards. Hardware meets vacuum integrity (leak rate), seal quality, gauge accuracy, and material compatibility (glass/316L for pharma/food). For moisture determination (Loss on Drying), cooling in desiccator is required by method (samples cool to room temp in desiccator before weighing to prevent moisture reabsorption and convection weighing errors). For electronics MSD, follow IPC/JEDEC J-STD-033 (floor life, baking at 125 C or low-humidity storage <5% RH). For pharma, follow cGMP (clean, documented, calibrated hygrometer).

Q3: What is the warranty period for the whole desiccator and key components?

A: Whole desiccator covered 12-24 months. Lid seal/gasket (wear - degrades with use/chemicals; replace if leaking), desiccant (consumable - silica gel, molecular sieves; recharge/replace when saturated), vacuum gauge/valve (wear - 3-7 years), and shelves (wear) are consumables/accessories. Damage from improper use, over-vacuum (glass implosion risk - use proper vacuum desiccator, not regular; shield), dropping glass (breakage), chemical attack on seal/gasket (some solvents swell/degrade rubber - use compatible gasket), or unauthorized modification is excluded. Extended warranty available. Glass body lasts years if not broken; seals 1-3 years; desiccant rechargeable (silica gel: bake at 120 C to regenerate).

Q4: Is this device difficult to operate? Is professional training required?

A: Very simple: place desiccant (silica gel, molecular sieves) in bottom tray, place samples on shelf (above desiccant, not in direct contact), apply vacuum or close lid (for passive desiccant type), open valve slowly (vacuum - sudden pressure change can break glass or spill samples), monitor gauge/hygrometer. For vacuum drying: connect vacuum pump, apply vacuum, heat (if oven-vacuum desiccator), release vacuum slowly with dry air/inert gas (do not let moist air rush in). No professional training required, but proper technique important. Safety: GLASS VACUUM HAZARD (glass desiccators under vacuum can implode if cracked/scratched - use safety shield, inspect for cracks, do not use damaged glass; plastic/metal safer for high vacuum), DESICCANT (silica gel dust - avoid inhalation; some indicating silica gel contains cobalt chloride (carcinogenic - use cobalt-free alternatives), handle with care), CHEMICALS (some samples release fumes - ensure compatibility, use in fume hood if toxic), VACUUM PUMP (oil mist, proper ventilation, do not pump corrosive/flammable vapors without cold trap). For cooling hot samples: allow to cool slightly before placing in desiccator (hot samples create convection/vacuum as they cool, can pull lid tight - use desiccator with lid release).

Q5: What is the typical lead-time for order delivery?

A: Standard models require 7-30 working days. In-stock units can ship within 3-7 working days. Custom configurations or large built-to-order systems may require additional time, and we confirm the exact schedule before order confirmation.

Q6: Is regular calibration required? What is the recommended calibration cycle?

A: Calibrate vacuum gauge every 6-12 months (with reference gauge, if precision vacuum needed). Hygrometer (if built-in) calibrate annually (with salt solutions or reference hygrometer). Routine: check desiccant condition (indicating silica gel changes color when saturated - blue to pink for cobalt type; orange to colorless for cobalt-free), recharge/replace when saturated (silica gel: bake 120 C/2 h or per manufacturer; molecular sieves: 250-300 C), inspect seal/gasket (daily/weekly - vacuum leak test), clean interior. For critical moisture work, verify humidity with calibrated hygrometer. For ISO 17025, maintain gauge/hygrometer calibration records. Desiccant is not calibrated but must be active (recharge regularly). Leak test: apply vacuum, close valve, monitor gauge - should hold vacuum (or rise slowly; rapid rise = leak).

Q7: Are supporting consumables universal?

A: Desiccant (silica gel, molecular sieves, calcium sulfate - universal lab supply; indicating vs non-indicating, cobalt-free preferred), vacuum pump oil (specific to pump), gaskets/seals (specific to desiccator model/size - use OEM or compatible size), and shelves (specific to size) are available from lab supply companies. Long-term cost: desiccant (rechargeable, low cost), gasket replacement (periodic), vacuum pump maintenance (if used). Very low ongoing cost.

Q8: Can I customize parameters or supporting accessories?

A: Customization includes type (passive desiccant only, vacuum (with port/gauge), inert gas purge (N2/Ar), vacuum oven combination (heated), cabinet (large multi-shelf, stainless for industrial/cleanroom)), material (glass (transparent, standard lab), polycarbonate (lightweight, shatter-resistant, not for high vacuum/chemicals), stainless steel (industrial, vacuum, high temp)), size (small 150 mm to large 300+ mm diameter; cabinets), features (built-in vacuum gauge, hygrometer (digital RH readout), gas inlet/outlet valves, vacuum release valve (slow release), clear lid, multiple shelves, outlet port for pump), accessories (vacuum pump (oil-free or rotary vane), desiccant (silica gel, molecular sieves), hygrometer, extra shelves, gasket replacement, safety shield (for glass vacuum), certifications (CE, ISO 9001, IPC/JEDEC compliance for electronics, cleanroom compatible).

Q9: Does the purchase include on-site installation and commissioning service?

A: Standard delivery includes desiccator, desiccant tray, shelves, lid/gasket, manual (vacuum pump and desiccant often separate). On-site installation not required (unbox, add desiccant, use). For vacuum/inert gas models, setup guidance provided (connect pump/gas, leak test). Training not needed for basic use. For large industrial cabinets or cleanroom installations, on-site setup available. Always leak-test vacuum desiccator before use with samples.

Q10: What types of samples are compatible with this equipment?

A: Compatible: hygroscopic powders/chemicals (salts, sugars, APIs), dried samples (after oven, for moisture determination), moisture-sensitive electronics (MSDs), anhydrous reagents/solvents, polymers/ceramics before analysis, and degassing liquids/epoxies (vacuum model). Not compatible: volatile/flammable samples under vacuum (can evaporate/boil, contaminate pump, fire hazard - use cold trap, fume hood), samples emitting corrosive/toxic fumes (attack gasket/desiccant, hazard - use in fume hood, compatible materials), samples requiring precise temperature control (use vacuum oven, not ambient desiccator), large samples beyond chamber size, or samples that react with desiccant (some chemicals - separate with shelf/container). For cooling hot samples after oven: standard procedure for Loss on Drying (USP <731>, ASTM) - cool in desiccator to room temp before weighing to prevent moisture reabsorption and buoyancy errors. For vacuum degassing: release vacuum slowly to avoid sample boiling over.