power posts | power-posts
Medical oxygen sensors

Things to Consider When Buying Medical Equipment From a Supplier

While choosing a supplier for your medical equipment needs, you need to keep in mind multiple points. As there are many suppliers dealing in different medical equipment, you need to carefully access each to find the best supplier.
Some of the most important things to consider when buying a medical equipment from a supplier are:

Reputation and experience
Once you have decided which medical equipment to buy, you should do the necessary background check for the supplier, like what is the reputation of the supplier in the market, does he have a good reputation, since how long is he in this business and does he have sufficient industry experience.

You can also check with the suppliers current customers to know if they are satisfied with the supplier’s medical equipments or not. Knowing the suppliers past record will help you make a decision.

Quality of equipment
Quality is an important factor when buying a medical equipment. Check for the quality of the equipment. Make sure the supplier offers branded products that have all the necessary features and specifications. It is also necessary that the products offered are standardized equipments that come with warranties. A reliable supplier will give a warranty for the medical equipment they are selling. Ensure that the warranty options are available on recertified equipments.

Services offered
Medical equipment suppliers should offer proper service that include after-sales support, on time material service visits, in-house service and repairs, when ever there is a requirement. Therefore, it is necessary for you to choose a supplier who is able to offer good post-sale service, and if any of the medical equipment needs repair, they should be able to get it repaired or replace it in a short time.

Product delivery
A reliable medical equipment supplier will ensure that the equipment is delivered timely on the agreed date and will see to it that the equipment has been delivered safely whether it is through shipping or by the supplier or by a third party.

After-sale service
After you have decided a supplier from where you will be buying the medical equipment, an important thing to consider is whether the supplier will provide post sale service and gives you proper training on how to use the medial equipment. It is advisable to buy medical equipment from a supplier who provides after sale services.

These are some of the important things to consider when buying a medical equipment from a supplier. To choose a reliable supplier you can also search on the web for online purchases. Web directories and yellow pages have much information on various suppliers of medical equipment.

Control Systems In Draft Fans

Control system is applied in all kinds of mechanical devices in order to obtain the required output from the system. In case of draft fans, control systems include motor controllers, belt drives and adjustable speed drives. Among the above three motor controllers, the kind of drive used is very important. These controllers will decide the overall efficiency of the system.

Motor Controllers

  • The motor controllers are switching mechanisms which take signals from a low power circuit such as on or off switch or a low, medium or high start selector switch, and configure it for energizing the motor windings to drive the motor at a required speed.
  • If we consider a consequent pole motor with a single set of windings, it is equipped with a switch that energizes two pole configuration or a four pole configuration.
  • In the case of multiple speed motor, the use of multiple windings and appropriate switching between 2-4-6 or 8 poles, provides variable speed levels like full, half, one-third or quarter speeds.
  • The multiple speed motors are a bit expensive and are less efficient than the single speed motors.

Belt Drives

  • These are used to reduce the rotational speed of the fans by using an appropriate ratio of pulley diameter to sheave for achieving the required fan speed.
  • When a belt transfers the power from the motor to the fan, change in fan speed is obtained by changing the pulley ratio.
  • The complete energy transfer to the fans by the motor is done by belts. The operation condition of the belt with the sheave and pulley, results in the efficiency of the speed change and power transfer.
  • There are several types of belt drives. For example Flat belts, V-belts, cogged V-belts and synchronous belts.
  • In belt drive system, there is a common problem of slippage which results in reduction of fan rotational speed causing an energy loss in the system, that finally leads to the reduction of over all air delivery.
  • If the belt drive is over tighten, it results in early bearing failure as well as early belt failure.
  • Some factors are taken into consideration while selecting the belt drive. They are belt size, maximum practical speed ratio, alignment of pulleys, variable pitch fan blades and adjustable speed drives.
  • In the belt size there are again four factors that are to be considered, they are horsepower required by driven load, the site operating temperature, service factor and the arc contact between the belt and the sheave or pulley.
  • Speed ratios of fan belts are limited to 4:1 which is the ratio of motor speed to the fan speed.
  • The reason for having a higher speed ratio is having less area of contact between the pulley and the belt, which results in lower friction loss.

The control systems will also include other mechanical systems which make the system run more effectively and efficiently. Sometimes, common control systems use electronic circuits that help them to improve the performance and productivity.

Affects of Gum Disease on Health

Dental Implant LondonGum disease is an infection which occurs to the tissues that support the teeth. It is mainly caused by bacteria from plaque buildup. In patients who are more susceptible to gum disease, the body over reacts to the bacteria around the gums and lead to inflammation. The result of the gum inflammation is that it affects the blood stream and slowly damages the blood vessels in the brain and heart over a long period of time.

Gum disease which is also known as periodontal disease starts when plaque made of mucus, bacteria and food particles invades the small space between your teeth and gums. If the gum disease progresses, it becomes difficult, painful and expensive to treat.

Gum disease is linked to other health problems including:

  • Diabetes and its control
  • Rheumatoid arthritis
  • Heart attacks and heart disease
  • Stroke

There is no evidence to prove that treating gum disease will prevent heart related problems, but it was suggested that there may be a link between gum disease and cardiovascular problem. In fact, gum disease may be a serious factor for heart illness than high blood  pressure, high cholesterol and smoking. The current theory is that the bacteria that is present in infected gums may become loose and move freely to all parts of the body. The same bacteria that cause the disease may affect your gums and travel to the arteries. Hence, the risk of developing cardiovascular disease depends on the severity of the infection.
If infected gums bleed, there may be a chance of bacteria entering your blood stream through these gums. If bacteria becomes dislodged, it can enter through the sores in your mouth and travel to other body parts through the blood stream. While analyzing the link between gum disease and heart disease, it was found that people who have periodontal disease are more likely to have poor heart health. Also, those having diabetes have higher risk of gum disease and infection problems than the normal persons. If the diabetes is not under control, people are even at higher risk of gum disease.

Gum disease has also been found to surge the risk of dementia in life. Also, it was found that the periodontal problems may be associated with cognitive impairment, such as memory problems. Rheumatoid arthritis is marked by painful joints and inflammation. People with this disease are more likely to have gum disease.

By doing simple preventive things people can save a whole lot of problems. Caring your gum involves:

  • Flossing once in a day
  • Brushing twice a day
  • Seeing your dentist for regular cleaning and check-ups.

Brushing teeth properly and getting the gums examined regularly, can prevent and treat gum disease, improve overall health and reduce the risk of health problems such as heart disease, cancer etc.

Rules and Regulations with the Ventilation System

Workers have a right to work in a safe place. The laws are imposed on employer in order to make the work place better, by providing ventilation system, health support, equipment to safeguard from fire accidents etc in the work place. Some basic acts related to ventilation system are as follows. We can say, in terms of the government laws the definition of the industrial Ventilation system is the method to protect employees from airborne contaminants.

  • The health and safety at work Act 1974 section 2(2)

According to this law the employer must provide and maintain a working environment that is reasonably practicable to ensure safe and secure workplace without any risks or hazards.

  • The control of substances hazardous to health regulations 1999 (regulations 6,7,8)

Undertake the risk assessment and prevent or control the exposure of your employees to substances hazardous to health by using suitable control measures which includes general ventilation, maintenance, examination and testing.

Importance of HVAC

In industries the ventilation system along with heating and air conditioning is called as HVAC (Heating, Ventilating and Air Conditioning). In pharmaceutical industry HVAC plays an important role in the manufacturing of the drugs. Some rules are as follows in this industry.

  • The type of filters required for different industrial applications.
  • Depends on the quality of the ambient air and the return air and also air flow rates.
  • Follow the standard test method to check the actual filter efficiency.
  • Materials for the components of an HVAC system must be selected in such a way that it should not become the source of contamination. Any component with the possibility of liberating or circulating microbial contamination into the air stream should be located up stream of the final filters.
  • Ventilation dampers, ventilation filters and other services should be manufactured and placed so that they are accessible from outside the manufacturing areas for maintenance of the systems
  • No person should become the source of the contamination at the workplace.
  • HVAC air distribution components should be made, installed and placed to prevent contaminants generated within the room from being spread.
  • High induction type air diffuses are not advisable in clean areas because the air introducing in the diffuse should be of low induction type to maximize the effect of flushing.

Setting up of rules and regulations will make the system run more effectively and ensure that life of people working inside the work place is not at risk. These rules and welfare laws are imposed on the employer by the Government to make sure the life of the worker is protected in many ways, without any adverse effects so that every worker leads a happy and healthy life.

tunnel ventilation

Limitations of the ventilation system

tunnel ventilationIn nature everything has limitations, likewise ventilation system also has its limitations. The limitations occur when there is excess expenditure on the system, due to mechanical Mal-function or due to the system failure or may be due to any other reason.

Require ongoing Maintenance

  • The ventilation system requires a regular and ongoing maintenance in order to ensure the correct working of the system.
  • This must be carried out in a regular and periodic manner for the good functioning of the system.
  • Some parts of the system with sliding pairs or reciprocating parts require frequent lubrication, and frequent cleaning is also necessary in places like air cleaner blower.
  • The ongoing maintenance will cost some amount to the organization.
  • During maintenance of the parts of the system, we come across different types of particles in the different sections of the system and these impurities must be disposed properly.

System Deterioration

  • This occurs when the parts of the system are exposed to the toxic gases, dust particles present in the air and they make them corrode beyond recovery.
  • When these parts get corroded, there is only one way to ensure our system to perform properly i.e. to replace them.
  • Thus replacing a part will impose some cost on the organization. Likewise in industries that deal with high temperatures or high pressures, they cause the parts to get distorted or deformed.
  • In some cases though the parts are fine there may be deterioration in the cylindrical tubes which can cause leakage of the contaminated air into the working atmosphere.
  • There are some expensive parts such as air cleaner, blower costing high may also get damaged after some period of time. When these parts gets deteriorated we cannot reuse them. So, this causes an extra loss of money to the organization.

Routine and Regular Testing

  • The main purpose of the ventilation system is to maintain the adequate amount of air inside the work place.
  • This is done by maintaining the amount of airflow in the system. So, the airflow is to be tested regularly in order to know the working condition of the system.
  • The measuring of the airflow consumes a time when performed on a periodic basis.
  • If we do not measure the airflow rate regularly inside the ventilation system this can cause a suffocation to the people working inside the working area.
  • The solution to maintain the regular airflow is to regularly clean the parts which contain the dust particles and the corners where the dust particles are trapped.
  • The measuring devices which are used to measure the airflow rate are also costly.
  • After complete testing of airflow rate we have to compare the results with the previous results in order to maintain a good rate of the airflow.
  • The other quantities which are to be tested are relative humidity, cooling effect that the ventilation system provides.
  • These can be measured by the aid of the different equipment available.

Requires a skilled person for monitoring

  • The regular maintenance of the mechanical parts involves a skilled person to rectify the problem.
  • If we use an unskilled person the outcome of the result will be different when compared with that of the skilled person.

Even though ventilation system has some limitations, an industry requires good ventilation system to run smoothly.

Knowing about Ventilation System

Industrial ventilation system is the process of circulating air inside the industry that of with the outside in order to make industrial air breathable, maintain adequate moisture, odor, smoke and maintain heat level. Ventilation also includes circulation of air within the building. It is one of the important factor of maintaining a good indoor air quality inside a building. It can also said as a mechanical system which is used to control exposure to airborne contaminants. Industrial systems are designed to move a specific amount of air at a specific speed which results in the removal of undesirable contaminants. While all ventilation systems follow the same basic principles, each system is designed specifically to match the type of work and the rate of contaminant release at that workplace.

Ventilation system is the most important feature for any industry which helps to make the environment more suitable for working. The two main types of the ventilation systems are dilution type and local exhaust type. Both serve in a different manner according to their needs. Ventilation system is very predominant in all manufacturing industries such as alloy industries, automobile industry, pharmaceutical industry etc.

Even the though the main purpose is to supply fresh air, it must also provide adequate cooling affect in the working area. Some important parts of the ventilation system are cylindrical tubes, fans, hoods, shutters etc. The ventilation system must prevent the formation of make-up air. Make-up air is the amount of air that is to be replaced when the contaminated is removed. If enough amount of make-up air is not supplied to the work place then the people may suffocate.

Working of a Ventilation System
The working of the ventilation system is nothing but attaining equilibrium pressure in the region and it can be achieved by removing of the contaminated air by introducing fresh air inside the work place. There are certain standards of having a ventilation system in workplace such as the mechanical design of the work place, area of the work place, number of people working in the work place etc. We can also see ventilation systems in submarines, where the amount of oxygen levels have to be maintained constant. In these applications the main purpose of the ventilation system is to remove excess carbon dioxide and fill it with fresh oxygen. Ventilation system is also applied in households where a single exhaust fan is installed to remove the heat from the house.

Main Purpose of the Ventilation System

  • To provide a continuous amount of fresh air from the outside.
  • To maintain adequate temperature and humidity levels.
  • Reduce the fire hazards up to some extent.
  • To remove the dilute and airborne contaminants.
  • To maintain required oxygen levels in submarines.