Modern dry vacuum pumps have been built for better performance and safety. Presently, there are different types and variants of dry vacuum pumps. For this reason, there is need to select the most appropriate pump. This process of selection of the most appropriate dry vacuum pump is still guided by the task at hand, or the tasks the vacuum pump is expected to perform. This means that the selection process is principally task-oriented, and this also implies that the quality of the vacuum pump is also considered during the selection process. The following 12 steps to finding the perfect dry vacuum pumps do provide a framework that would help one to find the vacuum pumps that best fit his or her needs. These steps are:
1. Select the type of dry vacuum pump
There are three main types of dry vacuum pumps; screw pumps, roots pumps, and the claw dry pumps. Each of these types of pumps is fit for particular purposes and needs as defined by its specific mode of operation and unique construct. All the three types share the same basic design of non-contacting and non-lubricated mechanical impeller; and they thus all share the same advantage of reduced risk of process contamination when in use. Nonetheless, they differ in the way the vacuum is created and the mechanics used to create that vacuum.
The screw pumps uses synchronous and high-speed Archimedian-style screws to create the vacuum while the claw dry pump uses two rotating cylindrical rotors to create vacuum. Both the claw dry pump and the screw pump normally discharge their content at atmospheric pressure; and for this reason they are described as primary vacuum pumps. On the other hand, the roots pump uses valve-less synchronized and interlocked rotors as the positive displacement devices. These devices enable it to push the gas from the inlet to the outlet; and for this reason they are described as booster pumps; and because of their ability to operate without liquid lubricants, they are also described as mechanical booster pumps.
2. Determine the tasks
As mentioned earlier, the different types of pumps are best suited to particular tasks. For this reason, the type selected must be able to perform the task well. Moreover, there are different sizes of pumps in each category; and thus one must select the size that best fits the allocated tasks. The advantage of aligning the process of pump selection with the need to perform a specific set of allocated tasks is obvious when it comes to performance and maintenance. A dry vacuum pump that is fit to perform the allocated tasks would require less maintenance, and would perform better than a pump that is ill-suited to the tasks.
3. Determine the Performance Level
The measure of performance of a particular vacuum pump provides an approximate value of its utility to the purchaser. Thus, after determining the tasks that the pump needs to perform, it is important that one finds the pump that would provide the required performance. Nonetheless, one must realize that performance is tied to the cost of the equipment with high performance equipment costing more that low performance equipment. This thus necessitates the need for cost-benefit analysis.
4. Perform a Cost-Benefit Analysis
Sometimes, the pump which would provide the optimum performance is very expensive and one cannot afford to purchase. In such an instance, one is required to select another pump that is cheaper and can still perform within acceptable limits. At this moment, the pump selected must be reasonably priced, but its performance must closely approximate the ideal optimum performance that was initially required. Thus, a reasonable priced pump can be purchased and then appropriately customized to enhance its performance. The need for customization requires the buyer to consider the quality of the pump.
5. Check on the Quality
The pump is made up of moving parts, and it also needs to generate pressure; and even transiently house pressurized gas. This means that the corresponding parts must be made of the right materials and designed appropriately for their tasks. Thus, the materials and design used determine the quality of the pump. Low quality pumps have a short lifespan, and are more liable to developing problems during use hence increasing the maintenance costs. Moreover, customizing a low quality pump can be difficult as the additional accessories can fail to be integrated properly into the pump.
6. Waste Disposal
It is advisable that one finds a dry pump whose waste disposal mechanism fits into the existing production setup. The main waste is used oil, and it is thus prudent that the pump selected should have a compartment whose drainage mechanism supports easily removal of the used and dirty oil.
7. Find a pump whose Maintenance Costs are Affordable
It is recommended that one purchases a quality and sturdy pump that does not require constant maintenance. Nonetheless, the pumps contain consumable components that are subjected to wear and tear during the operation of the pumps, and such components may need to be replaced. The replacement cost is part of the maintenance costs which also includes labor costs as qualified personnel would be required to do the maintenance tasks. One is thus advised to find a dry vacuum pump that can be maintained properly.
8. Find a pump whose Spare Parts are readily Available
Related to maintenance is availability of spare parts. One must select a pump whose spare parts are not only readily available, but also priced reasonably as this would assist in minimizing the maintenance and operations costs.
9. Customization Needs
The dry pump may need to be customized in order to fit it for a dedicated task. This implies that one is required to find a pump that is amenable to being customized according to his or her desires.
Safety is important, as an unsafe pump can damage not only the production unit where the pump is used, but also harm the workers. For this reason, one must select a dry pump that has been certified to be safe under standard working conditions.
11. Energy efficiency
The energy footprint of the dry pump during standard operations determines the cost of operation. This thus means that one must select, or find, a pump whose energy footprint during standard operations are low as this not only reduces the operation costs, but also optimizes the production processes.
12. Availability of accessories
One may need to add digital thermometers and computerized gauges to the pump so as to improve the monitoring process as well as optimize the output of the pump. If these accessories are already available, then one must find a dry pump that can be fitted with these accessories. Such dry vacuum pumps are also easily integrated into the existing production processes and setup.