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  • Bel-Art Scienceware F42020 Polypropylene Bottom Space Saver Vacuum Desiccator, 19.7cm ID, 23cm Flange OD, 26cm Height, 19cm Plate Size
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Bel-Art Scienceware F42020 Polypropylene Bottom Space Saver Vacuum Desiccator, 19.7cm ID, 23cm Flange OD, 26cm Height, 19cm Plate Size


List Price: $97.65
Price: $56.68 & FREE Shipping. Details
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Polypropylene, 19.7 cm ID, 23 cm Flange OD
  • Holds a full vacuum (29.9" Hg 75.9cm) at room temperature for 24 hours; will remain airtight even if not under vacuum
  • Polypropylene stopcock with PTFE plug accepts 6.4mm (1/4") I.D. tubing and allows a controlled entrance of air preventing unnecessary turbulence
  • 'Flat Dome,' clear polycarbonate top with large ribbed knob maximizes interior clearances and provides an average of 13% greater interior volume over standard hemispherical domes
  • All models include a 0.32 cm (") thick perforated plate; disposable or reusable desiccant can be placed on or under this plate
  • Clear polycarbonate top on a bottom that is either clear polycarbonate or chemical-resistant white polypropylene
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Product Description

Size: Polypropylene, 19.7 cm ID, 23 cm Flange OD

Bel-Art Space Saver Vacuum Desiccators, SCIENCEWARE 420200000 Polypropylene Bottom

Product Information

Size: Polypropylene, 19.7 cm ID, 23 cm Flange OD
Technical Details
Brand NameBel-Art Products
Item Weight2.4 pounds
Product Dimensions9.5 x 9.5 x 7.2 inches
Item model number420200000
Number of Items1
SizePolypropylene, 19.7 cm ID, 23 cm Flange OD
Manufacturer Part Number420200000
  
Additional Information
ASINB002VBW9RS
Best Sellers Rank #94,522 in Office Products (See top 100)
Shipping Weight2.4 pounds (View shipping rates and policies)
Domestic Shipping Item can be shipped within U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
Date First AvailableAugust 1, 2008
  
Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
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From the Manufacturer

Desiccators

Desiccators are an economical and reliable way to assure dry, dust-free, and if necessary, air-free storage of humidity sensitive products, such as valuable reagents or electronics.

Depending upon what you are storing, optimal conditions can be achieved using standard desiccants in a manual or automated format, with gas purge or by keeping the contents under vacuum.

When choosing a desiccator the following questions should be considered:

Q. What storage environment is optimal or required?

A. Use this chart for an overview of the environment and benefits each method of desiccation provides.

Standard Desiccant Automated, Standard Desiccant Gas Purge Vacuum
Manual monitoring and operation. Moisture is absorbed from air in the unit by using a desiccant. Once the desiccant is 'saturated' it must be regenerated through heating, or replaced. Electric fans and heaters continuously regenerate the desiccant to prevent saturation and to automatically maintain a low humidity environment. A slow steady flow of inert gas (often dry nitrogen) is provided. Air and moisture are removed by the chamber by use of a vacuum pump.
Flexibility to use any type of desiccant (silica gel beads, activated charcoal, etc) based on economics and convenience. Convenience, requires minimal monitoring. Achieve relative humidity at a much faster rate. Best for total dry storage or if air could be damaging to material being stored.
Portability. Precise control of humidity. Operates on a set schedule of desiccation followed by a regeneration period. Dust free and desirable for many applications including clean room environments. Dust free and desirable for many applications including clean room environments.
Economical functionality. Most desiccants can be regenerated periodically. Process uses silica gel beads that last for thousands of regeneration cycles. Option to close stopcocks and use with regular desiccants. Option to close stopcocks and use with regular desiccants.

What do you need to know to choose the right desiccator?

Q. What size(s) are the items you need to store and in what quantity?

A. Interior volume of the desiccator and shelving should be considered.

Q. How important are ease and economy of use?

A. Each method of desiccation has advantages and trade-offs. Each user must determine the method that best serves their purposes. Using standard desiccants and regenerating them as needed is economical, but requires monitoring. There may also be more variability in your environment. An automated desiccator requires much less monitoring but uses electric power. Gas ported desiccators are quick to achieve relative humidity, but if the unit is accessed frequently, proportionately more gas will be needed to keep the desired low humidity level. Vacuum desiccators remove air and moisture and can be brought back to vacuum rather easily after opening but require a pump.

Once you have determined your most desirable method of desiccation, there are a variety of styles and sizes of desiccators to choose from.

Search by brand name indicated below for more information.

Secador Space Saver Techni-Dome Dry-Keeper Lab Companion Scienceware
Standard Desiccation 0.31 to 1.87ft³ 0.09 to 0.31ft³ 0.14, 0.35, 2.01 & 2.08ft³ 0.21 & 3.6ft³
Automated, Standard Desiccation 0.51 to 1.87ft³ 1.2, 2.01 & 2.08ft³ 3.6ft³
Gas Purge Desiccation 0.31 to 1.87ft³ 2.29ft³ 0.14ft³ 3.6ft³
Vacuum Desiccation 0.09 to 0.31ft³ 2.29ft³ 0.2, 0.4, 0.7, 0.8, 1.2 & 1.6ft³ 0.015 & 0.21ft³
F42010-0000 F42012-0000 F42020-0000 F42022-0000 F42025-0000 F42027-0000
Bottom Material White Polypropylene All-Clear Polycarbonate White Polypropylene All-Clear Polycarbonate White Polypropylene All-Clear Polycarbonate
Flange O.D. 17.1cm (6¾") 17.1cm (6¾") 23cm (9¹/₁₆") 23cm (9¹/₁₆") 27.3cm (10¾") 27.3cm (10¾")
I.D 14.9cm (5⅞") 14.9cm (5⅞") 19.7cm (7¾") 19.7cm (7¾") 24cm (9⁷/₁₆") 24cm (9⁷/₁₆")
Plate Diameter 14cm No.3 14cm No.3 19cm No.4 19cm No.4 23cm No.5 23cm No.5
Overall Height 20.6cm (8⅛") 20.6cm (8⅛") 26cm (10¼") 26cm (10¼") 31.1cm (12⅛") 31.1cm (12⅛")
Clearance above plate 12.1cm (4¾") 12.1cm (4¾") 15.7cm (6³/₁₆") 15.7cm (6³/₁₆") 19.7cm (7¾") 19.7cm (7¾")

Technical Details

Size: Polypropylene, 19.7 cm ID, 23 cm Flange OD
  • Brand Name: Bel-Art Products
  • Part Number: 420200000
  • Number of Items: 1
  • Item Package Quantity: 1

Customer Questions & Answers

Customer Reviews

3.9 out of 5 stars

Most Helpful Customer Reviews

10 of 11 people found the following review helpful By scott on November 12, 2011
Size: Polycarbonate, 19.7 cm ID, 23 cm Flange OD Verified Purchase
I bought this to de-air RTV and resin and ended up ordering two of these to get a complete and usuable unit. Both were missing parts: the first was missing the neoprene gasket and the second desiccator contained two bottoms! The odds of two having missing/mismatched parts seems to indicate a problem at the factory.

The Good:
The desiccator shells themselves are quite thick and seem durable.

The Bad:
The neoprene gasket is too small for the groove it sits in and it easily pops-out. You must be very careful to get the gasket to sit and then carefully place the top on. The timing is not ideal when your hands are contaminated with RTV or resin and the neoprene gasket slips out. I plan to try grease to see if it will stay better, or ultimately use some Piobond or similar glue

The valve that comes with it is not high quality and leaks. I had to run my vacuum pump continuously to maintain the vacuum.

Despite the quirks, these do work and are considerably cheaper than a bell jar.
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7 of 8 people found the following review helpful By DREWSASTER on September 13, 2012
Size: Polycarbonate, 19.7 cm ID, 23 cm Flange OD Verified Purchase
I received this item for my birthday, and it DOES hold a vacuum, if you can get the gasket in place, and if you leave it hooked up to a running vacuum pump... The valve leaks, the O-ring leaks, seems everything leaks, I have tried vacuum grease with no success. The product description says this thing should still be holding a good vacuum after 24 hours, yeah right. Mine loses all vacuum in a matter of minutes, I expect better products than this on Amazon, especially considering this thing is supposed to be a lab product. I will say that in it's defense it would make a wonderful cereal bowl and is alot larger than I expected. I looked inside the valve and can see plastic "burrs", which are probably what cause it to leak. Also speaking of burrs, they did a poor job of finishing the plastic shelf that comes with the unit. I would recommend buying something from a better brand if you do important work, especially considering I bought this for hobby use and it's just about useless.
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3 of 3 people found the following review helpful By Brenden L. Kelly on June 2, 2013
Size: Polypropylene, 14.9 cm ID, 17.1 cm Flange OD Verified Purchase
The stopcock leaks a few inches of mercury a minute without a constant vacuum being applied. The o-ring can be difficult to keep in place but is adequate for my uses.
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5 of 6 people found the following review helpful By Jason Milner on December 6, 2012
Size: Polypropylene, 14.9 cm ID, 17.1 cm Flange OD Verified Purchase
It will not reach a full vacuumn or hold a vacuumn for any extended period of time I don't recommend this!!
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6 of 8 people found the following review helpful By Kevin T. Smith on November 17, 2010
Size: Polycarbonate, 14.9 cm ID, 17.1 cm Flange OD Verified Purchase
Can't find any other way to contact anybody; so, airing my grievances here!!!
This item is not as advertised. It is not Bel-Art part number 420120000.
The stopcock valve has been removed that is a standard element of the proper assembly.
I am sure the seller will point to the fact that a picture of the modified assembly has been taken and included that does not show the valve; and, that is correct.
But, if you purchased this item by part number anywhere else, you would receive the complete, unaltered assembly.
Even the literature enclosed indicates the valve.

Otherwise, it functions as required.
Only, I was cheated out of a $5 valve. (presumably sold by the seller to someone else for additioanl profit)
Such are the risks of purchasing from other than the proper source. All to try to save a few bucks!
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1 of 1 people found the following review helpful By Eric on December 31, 2012
Size: Polycarbonate, 19.7 cm ID, 23 cm Flange OD Verified Purchase
I bought this based on some other reviews for use as a vacuum chamber to de-air silicone rubber molding compounds and epoxy resins for a work project.

As other reviews note, it's pretty sturdy, but the o-ring likes to jump out of its groove and the petcock has a tendency to loosen and leak a little. It generally won't hold a useful vacuum without the pump running, and certainly not for 24 hours. It does allow me to completely de-air 275 grams of Smooth-On Mold Max XLS II in 5 minutes or so when using a 5CFM pump.

Would I buy again? Probably not... I think I'd just do DIY vac chamber with a section of 8" PVC, some polycarbonate sheet, and silicone caulking.
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4 of 5 people found the following review helpful By brian on July 3, 2013
Size: Polypropylene, 14.9 cm ID, 17.1 cm Flange OD Verified Purchase
Product works but after a few uses the valve has a slow leak so you need to keep pulling vacuum.
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3 of 4 people found the following review helpful By Jenny W on March 15, 2012
Size: Polycarbonate, 19.7 cm ID, 23 cm Flange OD Verified Purchase
I'm using this jar in conjunction with Robinair 15500 VacuMaster 5 CFM Vacuum Pump to degass silicone and resin for molding/casting. My molds and finished parts are small, so I selected this small jar so that the pump would have less air to pull out. My plan worked great and it only takes 30-60 seconds for my vacuum to pull the air (I think, anyway, I need a pressure gauge to put inside). The o-ring was too small when it arrived, but I just stretched it out a bunch until it stayed on. Very happy with the product.
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Bel-Art Scienceware F42020 Polypropylene Bottom Space Saver Vacuum Desiccator, 19.7cm ID, 23cm Flange OD, 26cm Height, 19cm Plate Size
This item: Bel-Art Scienceware F42020 Polypropylene Bottom Space Saver Vacuum Desiccator, 19.7cm ID, 23cm Flange OD, 26cm Height, 19cm Plate Size
Price: $56.68
Ships from and sold by Amazon.com