Ovens play an often times critical role in the processes that occur inside laboratories. These processes include a variety of activities, ranging from drying samples and glassware, to completing different types of melting and chemical reactions. There is an obvious need to be extra cautious when completing each of these processes, especially when working with materials that tend to overheat, or when dealing with toxic airborne contaminants. Explosions and fire are common risks associated with working with laboratory ovens.
There are several precaution measures that need to be put into practice when operating ovens in lab areas, and below we are going to speak about some of the most important of them.
Basic Oven Inspection Tips
Lab oven inspection is mandatory prior to their use. Ovens need to be maintained in good operating condition. The cords and outlets need to be inspected for signs of damage and malfunction.
Temperature sensing devices need to be properly installed, as they are responsible for turning off the ovens automatically should the materials overheat inside the oven.
In the event of an oven not working under normal parameters, it should be taken out of service and not be used again until all repair work is done. Unplugging and placing “defective oven” tags on the plug and door of the oven are also logical steps. A faulty oven that is used improperly is prone to cause more or less severe issues.
The calibration of the oven also needs to be verified with a thermometer in order to make sure that the temperature read-out is accurate. Special attention should be given to the high temperature shut-off set point. Ovens need to be maintained clean and free of any chemical spills or residues.
Safe Storage&Surveillance Of Ovens
It is not advisable to store any combustible materials like paper, plastics, or cardboard nearby ovens. This includes the areas on top, next to, under, or behind ovens.
Liquids that are flammable should be kept away from hot surfaces.
Storage of materials inside laboratories should be done in specially designated areas, away from open flames or ovens.
Modern-day labs rely on electronic locks that require special access cards, or fingerprint lock alternatives. Deadbolt locks should be added to existing sets of locks for more safety in case classic types of locks are installed on the doors.
Surveillance systems and intruder alarms are also highly advisable to prevent unwanted occurrences inside laboratories. Surveillance cameras that record and broadcast images in real time on a 24/7 basis can help identify potential oven fires and other similar accidents on time and prevent them from spreading out and causing explosions.
Lab ovens usually feature alarms that rely on audible tones that signal the oven has reached certain operation conditions that will require the attention of the person operating the oven.
Heavy Duty – Standard or Custom Built to Customer Specifications
Robust and very adaptable workhorse ovens are available to work at up to 250°C or 300°C. They can be supplied with either a coated steel or stainless steel chamber and adjustable shelves and a digital PID controller as standard.
Some applications such as curing rubber compounds can release unpleasant vapours. In such circumstances we would recommend to fit a variable rate extraction unit (as depicted in the photo above)
HDV style ovens have one door with HDH models having two doors as shown below.
HDH Oven.225 Litres.
As standard the outer chamber is finished in grey powder paint with a blue control panel but the colour scheme can be either one or a combination of colours.
HDV models are available in capacities up to 1000 litres or more, and can be supplied internally ‘spark free’, and ordered with different types of shelving to suit various applications and include rollers for heavier products.
Ideally suited to a robust laboratory or industrial environment where a really sturdy cabinet is required . This particular model has a corrosion resistant coated steel chamber with two doors; irrespective of the size or height of the oven ordered. Doors are fitted with heavy duty hinges and catches. In fact everything about this oven is heavy duty, making it one of the obvious choices for use in a demanding environment.
These Standard Digitally controlled Laboratory Ovens in horizontal styleoffers accurate temperature control with a reliable safety function. They come with a digital controller and internal fan circulation and a safety thermostat. Stackable space-saving design makes them an ideal solution for compact laboratory spaces.
Capacities from 50 to 200 litres
Standard temperature range 40°C to 250°C
Fluctuation typically +/-0.75°C
Calibrated dial thermostat
Overheat safety thermostat
Typical oven applications include:
General aging Curing rubbers & plastics General conditioning Desiccating products Drying products Moisture extraction Wax and grease softening Drying plant tissues Soil drying Drug metabolism study Burn-In of electronics Resin curing General heating Drying glassware Moisture exclusion General drying applications Pre-heating Pre-warming Softening plastics Moisture determination Sterilization Textile drying Vulcanisation Annealing Aerospace testing.