Welch’s manufactures the CRVpro rotary vane pump range, a series of two-stage rotary vane pumps designed for various laboratory and industrial applications. These pumps are available in various sizes, with pumping speeds ranging from 2.5 liters per minute to 65 liters per minute, along with various configurations to suit specific applications, including corrosion-optimized ...
There are two types of filtration which are commonly used in the laboratory and it is important to select the correct type for the work you are doing.
But what is the difference between gravity and vacuum filtration?
How do you choose what type of filtration you need to do?
And what equipment do you need for each type?
Vacuum Filtration - also known as Buchner filtration - for when you nee...
Comparing vacuum pumps - how to tell which provides a stronger vacuum?
When choosing a vacuum pump for any lab or industrial process such as vacuum filtration, rotary evaporators or for a vacuum oven, you may want to compare different models.
Since vacuum can be expressed in so many different units (mbar, bar, Torr, mm Hg, Pa, psi...) this can be difficult to do!
Looking at the ultimate vacu...
Rotary vane pumps are positive-displacement pumps consisting of vanes mounted to a rotor that rotates inside of an oil-sealed cavity. These moving vanes transport volumes of gas through the system and out of an outflow.
Rotary Vane Pump Principles
The above diagram illustrates the pump action. The rotary action of the pump creates a hollow space in the chamber (1) which expands as the pump ro...
Filtration under vacuum, also known as Büchner filtration, is commonly used to isolate the solid precipitate from a solution.
This technique is used in syntheses, for example when a reaction has yielded a solid, or in analyses including gravimetric analysis of suspended solids.
Although performing the filtration is simple, several pieces of equipment are needed which must all fit together, so...
In biochemistry, cell culture and microbiology applications, aspirators are commonly used for the removal and disposal of liquids. The aspiration pump creates a vacuum in the collection bottle which pulls in liquids due to differential pressure. The liquid collected in the bottle can then be disposed of.
At Camlab we supply a range for vacuum pumps from Welch ideal for this purpose. This range...
When performing a vacuum filtration, the solvent present can dictate the pump used. This is because some pumps are not "chemical duty" - with seals that work well with water vapours, but could degrade over time if exposed to organic solvent or acidic or basic vapours.
We have taken a look at some of the common solvent categories and which vacuum pumps are most suited for use with them to give ...
Safely disposing of liquid waste in the lab, especially liquids in PCR multiwell plates, can be an awkward task. The Handvac units from Welch Ilmvac allow you to quickly, easily and safely draw up waste liquid from used PCR plates to collect it in a waste vessel for later disposal. The specialised attachments available make vacuum aspiration from any container quick and simple, while the ...
Many laboratories want to make their operation more environmentally friendly and reduce their carbon footprint. The 5 steps below are a good starting point for simple changes to get closer to being a green lab [caption id="attachment_5129" align="aligncenter" width="300"] How can you make the laboratory more environmentally friendly?[/caption] We've been reading the great tips and ...
Rotary vane vacuum pumps are a popular choice in laboratories when a strong vacuum application is needed, but they do need maintenance to keep them running smoothly. However, there are some simple steps you can follow to extend the life of your pump and the pump oil [caption id="attachment_6273" align="aligncenter" width="294"] Rotary Vane Vacuum pumps are used in the lab for a range of a...
Most laboratories will have a vacuum pump. They are widely used across labs of all disciplines for a range of tasks from basic filtrations or evacuating a desiccator right up to use with large equipment such as vacuum ovens or rotary evaporators. The two most common types are rotary vane or diaphragm pumps - but what do these mean and what is the difference? [caption id="attachment_5483" ...
Vacuum Pumps are found in every laboratory for a huge range of uses, but how do you decide which one is suitable for the task? Laboratory vacuum pumps can have a lot of different features, which makes them suitable for different jobs. For example, "chemical duty" pumps have better chemical resistance, for working with organic solvents or corrosive substances. Others can apply pres...
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I came across your article about "DPD Tablets" on Camlab Info, and it's a valuable resource for anyone seeking information about water testing and analysis using DPD tablets. Your explanation of their usage and significance in water quality monitoring is quite informative.
This article on nanocolor tube tests is a gem for analytical enthusiasts. The idea of zero calibration is intriguing, and your detailed explanation makes it accessible. The step-by-step process helps demystify the technique for beginners like me. The use cases you've highlighted, particularly in...
Grant have introduced the new Controlled Rate Freeze Thaw (CRFT), which is a liquid nitrogen and cryogen free controlled rate freeze and thaw system for cryopreservation in a wide range of applications. Cryopreservation is a process where biological materials such as cells, tissues...
A dipslide is a means of testing the microbial content of liquids. This is a common method of monitoring and measuring microbial activity within many systems and commonly cooling systems. Usually the use of a dipslide is the first line of defence for the testing of microbial issues that could be...
Purchasing items using donated funds without the burden of VAT will now save many Millions of pounds each year which can be put to better use in advancing scientific knowledge to provide new treatments and cures that will shape the medicines of the future.
Working with pressure/vacuum conditions in the lab is common but not all products are designed to withstand this. Products with appropriate geometry and wall thickness are suitable for working safely with pressure. For example, filtering flasks, desiccators, or flat flange vessels, as well as...
