Machines need more energy and horsepower to provide high performance. Therefore, vacuum pumps are used to create that favorable environment. There is a need to control the situation in which the machines are working to have higher efficacy and achieve higher performance levels.
Best vacuum pumps do not allow any leakage of gas. A vacuum pump is basically a device that sucks the water vapors, moisture, and air from a chamber to create a vacuum inside it. The primary reason to do all these things is to create an optimal environment to carry out the industrial and domestic processes.
Vacuum pumps work on three principles including the positive displacement, momentum transfer, regeneration, and entrapment. Based on these principles, the vacuum pumps are designed to provide safe and secure use in the industrial sector, medical sector, agricultural sector, aviation and automobile industry.
Best vacuum pump for ac and refrigeration work on the positive displacement principle and most of them fall in the rotary vane category. A lot of things have to consider from the manufacturers while choosing the best vacuum pumps.
Such items include the material used into the making, tolerance, and reliability of the vacuum pump, the sealing material, the inlet intervals, the pressure flow and above all is the fact that the material does not show any reaction to any chemical or gas upon exposure.
Scroll through this article to have a better idea about the things that must be considered while buying the best vacuum pumps. A few examples are given below which will be a definite help while buying as well.
Consider Before Buying A Vacuum Pump
CFM: When looking for the best vacuum pump, have a look at the CFM, or cubic feet per minute. The CFM gives an insight into the vacuum flow speed, and it tells you the rate at which you can get air out of a refrigeration system, air conditioner or a tank. CFM ranges from 1.5 to 11.
Micron Rating: It is better to have a lower the micron rating. A suitable vacuum pump can take up to 75 microns, while as low as 50 or less is taken up by other vacuums. A 5 CFM vacuum pump can quickly make it up to 35 to 25 microns. An Air conditioner works well at that level.
Sizable Diameter: Always find a sizable diameter for a vacuum pump that you are going to use as you will have to fill oil in it. A suitable width is needed to avoid the spillage of oil while loading it in the vacuum pump.
Easy to access Sight Glass: The sight glass must be designed in such a way that you can easily spot the mark to which the oil is filled. It also allows you to check if the vacuum pump is already loaded as well.
Suitable Oil Plug: The oil plug of the vacuum pump should have an adequate opening and diameter. Aiding the drainage and flow of oil is imminent. A prominent and broader opening will be more suitable and convenient.
Gas Ballast Valve: Some vacuum pumps come with a gas ballast valve. Some air enters the pump when this valve is opened. They help to evaporate the water vapors from the pump before they get mixed with the oil in the pump. It is useful to know as a customer in the early stages of evacuation.
Vacuum Gauge Indicator: You can always have a sight of the vacuum drawn right in front of your eyes using the Vacuum gauge indicator.
Isolation Valve: Isolation valve makes the managing of the vacuum system and the oil in it a bit easier. It allows you to shut the unit on and off whenever you want. Isolation valve can be used to drain the oil out of the system and refill it as well.
Exhaust Filling: An exhaust filling is pivotal to indoor workings. For external venting of the garden hoses, the exhaust filling makes for a perfect attachment.
Best Vacuum Pumps of 2018 According To Their Types
Vacuum pumps work on three principles according to which they are further classified as well:
- Vacuum generators.
- Diaphragm pumps.
- Rotary vane pumps.
They are either single stage pumps which draw the air in one phase. Or they could be double stage pumps which draw air in the first stage and then make the vacuum more sealed and tighter in the second stage.
The more commonly used pumps nowadays are the rotary vane pumps so we will discuss its examples in detail.
Rotary Vane Pumps
They are oil-based pumps. The vane gets pumped with oil which enables it to create a vacuum. They provide excellent working efficacy and credibility. Although you have to change oil time to time to prevent the clogging which could be an inconvenience for some people, it works well. If you are looking to buy the best vacuum pump for HVAC, you can opt for the Rotary vane pumps. They are reliable and can be your partner for a very long time.
Here is a few example that you can consider if you are looking to buy a vacuum pump for your commercial or domestic use:
Single Stage Pumps
ZENY 5 Pa is a 3 CFM, single-stage vacuum pump which is highly rated for 38 microns. It comes with a sight glass. A cooling fan and exhaust port are also present. It is made of aluminum alloy and weighs around 11.7 pounds. Its dimensions are 12.6 x 10.6 x 6.3 inches.
It is affordable as well. But the drawback is the fact that it needs a separate adapter for the attachment of another tubing.
- It is Lightweight.
- Has Cooling Fan and exhaust port.
- Noise-canceling device.
- Needs a separate adaptor for another tubing.
- Has a low CFM.
The Kozyvacu TA350 Single-Stage Rotary is a 3 CFM, single stage vacuum pump which is rated for 150 microns. It comes with a built-in glass sight and an oil reservoir. It is made of aluminum and weighs around 10.6 pounds. Its dimensions are 10.7 x 10.6 x 4.7 inches.
It also comes with a thermal protection that is for the protection of the motor. It also prevents overheating and operates at 120 Volts and has an oil capacity of 280 ml.
- The machine is portable and light in weight.
- Sight glass allows clear sight of the oil level.
- Easy to start and operate.
- It takes time to start.
- Its power rating is deficient.
XtremepowerUS 3CFM or 4CFM Air Vacuum Pump is a 1/4 HP 3 CFM Single-Stage Rotary Vane Vacuum Pump. It is operated at 110 Volts. It weighs around 10 pounds and has the dimensions of 14.2 x 12.5 x 10.5 inches. It comes with silicone dampened gauges. A set of 3 – color-coded hose 36″ is also a part of the vacuum pump along with the Diagnostic R134A, R12, R22, and R404A.
- Good ac pump at such an economical price.
- Has a sturdy design.
- Not easy to operate and handle.
- Gauges wear out after 8-12 months.
Double Stage Pumps
Robinair (15500) VacuMaster Economy Vacuum Pump comes with free air displacement. The pump is 2-stage and 5 CFM. The Intake fittings of the pump are 1/4 inch MFL and 3/8-inch Acme, 3/8-inch FFL x ½-inch Acme adapter.
It has an Oil capacity of 7.5 ounces (220 ml). The pump operates at a voltage of 115V and 60 Hz. It weighs about 21 pounds and has dimensions of 15 x 8 x 11.7 inches. It has a sturdy housing and has a built-in sight glass that allows keeping track of the oil levels. The 2-stage system will enable it to remove more dirt and debris from the system.
- Easy to use.
- Suitable for medium draining jobs.
- Comes at an economical price.
- Spilling of oil is an issue for it.
- The design is not sturdy due to the use of plastic.
The Robinair (15600) CoolTech Vacuum Pump is a unit that is very budget-friendly having off-set rotary vanes. It works as a 2-stage, 6 CFM vacuum pump. The dimensions are 18.6 x 7.7 x 11.8 inches, and it weighs 30 pounds. It comes with a solid housing and a heavy-duty motor.
The pump has a built-in sight glass and allows to change oil quickly as well. This pump comes with fittings that are suited for multiple attachments and adaptors according to your usage. The Robinair can pull 40 micrometers which make it a great option to be chosen for small to medium drain jobs.
- Removes more debris from the system and is durable as well.
- Easy to Drain and Refill.
- Affordable as it comes at a very economical price.
- Spitting of oil has been reported which is a big drawback as it messes up the while working area.
- Plastic Parts are used in making the handle and cap which is quite a disappointment.
The Yellowjacket is the company which is probably the most impressive regarding its products. But its items are the costliest on this list. The Yellow Jacket 93580 Superevac Vacuum Pump unit rated up to 100 microns. It has a sturdy design which is made of aluminum mostly. Its dimensions are 19 x 8.2 x 13 inches, and it weighs 12.28 pounds. It allows you to get a higher level of vacuum which is needed in the industry mostly.
A built-in ball valve is also a part of the system which will enable you to separate the space from the oil if you want to change it during the working of the vacuum. It also comes with a filter screen which is there to prevent the damaging particles from closing the system. It comes with an intake check valve which prevents clogging of the unit if there is any short circuit or power failure.
- Comes with a vast reservoir that helps to keep the unit free of overheating.
- Has a good Sight Glass Range which helps to keep a better track of oil level.
- Aluminium is used in the making which allows it to have a sturdy design.
- Intake Check Valve is also a plus point.
- Ball Valve System is an ultimate saver as well.
- It is a bit more expensive than the others having the same features available in the market.
Yellow Jacket 93600 Vacuum Pump is terrific two-stage vacuum pump available in the market. It is made of metal and has a steel handle. It is a seven CFM economy vacuum pump. It works at 115 volts and 60 Hz. It has 28 oz. of Oil capacity.
In case of a power failure, internal intake check valve prevents oil back up into the system. Intake filter screen keeps unnecessary particles from going into the pump. It has a large sight glass that allows you to monitor the levels of oil easily. Its dimensions are about 8 x 13 x 19 inches, and it weighs approximately 35.9 pounds.
- Wide-mouthed oil reserve that allows you to drain and fill oil easily.
- Comes with a threaded garden hose which can be carried around easily.
- Comes at a suitable price.
- Easy to use as well.
- Can hold 28 microns pressure which is less than its competitors.
All of these are the best vacuum pumps available in the market. You can see the differences in each on of them and then make your final decision according to your requirements. Whether it is the CFM, isolation valve, sight glass or the oil plug, make sure that you select the right one for your domestic or commercial use. Consider the features and the price first and then buy any vacuum pump as it will serve you for a long time.