If you’re here just to find the best vacuum pumps and really can’t afford to take the time to read the excellent reviews and buying advice prepared by our researchers, this short paragraph will highlight all the vital information. We have gathered plenty of information about different products for sale on the market by looking into claims in expert review sites and comparing the products there with the reviews and ratings in actual owner feedback. Fortunately, after all the extensive product research and comparison, we have been able to find what we believe is genuinely the best one in this category, the Robinair 15500 VacuMaster. This machine offers the power and capacity to handle a wide range of applications. It comes with a high CFM rating and two-stage rotary vane design to provide fast and thorough evacuation compared to single-stage pumps. You can expect a deeper and more thorough system cleaning thanks to how the second stage commences pumping at a lower pressure. Lightweight and durable, the pump boasts cast aluminum housings plus a high torque design to ensure problem-free start up and efficient running. If the Robinair 15500 VacuMaster runs out of stock, we highly recommend the second best option in terms of quality and performance, the FJC 6912.
One of the most essential pieces of laboratory equipment is the vacuum pump. It also happens to be one of the most difficult to choose, as it comes in various designs and a wide array of features. It becomes paramount to consider the service applications for this kind of equipment, among other things, before just settling for any particular model.
Choose a suitable type for your needs
Traditional vacuum pumps are of the rotary vane type, which is still commonly used. Perfect for applications that need more thorough and deeper vacuuming, this type handles greater service demands while also presenting more need for cold trap coolant or an efficient AC system to protect the oil or prevent the filtrate from evaporating, along with avoiding bumping and foaming that can lead to loss of the sample. This is why most buyers of this type of machine focus closely on the ‘ultimate vacuum’ element, or the lowest pressure the unit can go to.
The pumping system of a rotary vane model comprises an eccentrically installed motor, vanes that move in a radial manner under resilient and centrifugal forces, a housing, and the inlet and outlet. An available inlet valve is geared to serve as a vacuum safety valve that remains open while the pump is in operation. Located inside the housing is the working chamber, which is restricted by the vanes, rotor and stator. Rotary vane pumps are either single- or two-stage. Offering lower ultimate pressures than single-stage pumps, two-stage versions also take lower ultimate pressure from the effects of the gas ballast, which is only allowed through at the high pressure stage. The pump gets isolated from the vacuum chamber by the vacuum safety valve in cases of intentional or unintentional standstill, which some premium models are equipped to handle. In such an event, the displaced gas vents the pumping system to block the oil from rising into the vacuum chamber.
A diaphragm pump is practical for most lab applications. More effortless to maintain, a diaphragm pump with chemical-resilient valves and diaphragms is appropriate for corrosive solvents without the need for a cold trap or for air conditioner systems to handle malodorous, hazardous oil mist in the laboratory. A vacuum is provided by a diaphragm pump in the necessary lab application range. Dimethylformamide (DMF), a common solvent for chemical reactions, along with other high boiling point solvents, can be evaporated at near room temperature or less than 100 degrees fahrenheit, along with the polar aprotic solvent Dimethyl sulfoxide (DMSO) that can be isolated at about 125 degrees fahrenheit, with a premium quality diaphragm model. Diaphragm pumps can be designed to be either chemical-resistant types or those appropriate for non-corrosive applications. The cost of a diaphragm pump rises with corrosion-resistant components.
Choose a suitable ultimate vacuum and flow rate
The specification for the ultimate vacuum of a pump refers to the lowest pressure that it can achieve or the pressure at which it ceases to move any vapor. You want the vacuum pump you choose to feature an ultimate vacuum specification below the level at which you intend to run your application. For instance, do not get a 5 Pa pump if you need to run your application at the same level.
The volume of gas the pump can move per unit of time is referred to as the flow rate, free air displacement or pumping speed. Regardless of the necessary ultimate vacuum, you will need a pump with higher flow rate to handle larger applications. The flow rate is the top speed the unit can move vapors at atmospheric pressure or simply in the absence of a vacuum. When running at the necessary vacuum levels for your specific service application, even pumps with identical flow rate specification can deliver varying actual pumping speeds. A unit that can’t produce enough flow at the necessary vacuum level will cause a slower progression of the application and in extreme cases, even no progress at all. The available proportion of the specified flow rates is demonstrated through a flow curve of the pump’s vacuum range. Be sure to ask about the flow curve when comparing flow rates at operating vacuum.
Choose your control options
Electronic adaptive controls provide the highest level of vacuum pump system control. Motor speed is consistently adjustable, depending on the instantaneous sensing of application conditions, to ensure sufficient pumping speed for maintaining the target pressures while reducing the risk of bumping or excessive pumping. Electronic adaptive controls prove to be appropriate for protecting critical samples and for full automation in evaporative applications.
With manual controls, you have the option of a basic on/off control or bleeder valves or pinch valves for manual adjustment of the control of flow. Manual controls offer a more approximate vacuum control thanks to the manual matching of the pumping speed according to the vapor flow rate, which varies with vacuum pressure. Manual operation can be guided by a gauge that monitors vacuum pressure conditions.
Electronic two-point controls adjust the vacuum in much the same way that a thermostat controls temperature. After the setting of a target pressure, the application pressure is maintained within a narrow range close to the target by an electronic controller for switching the pump on and off. This can also be achieved by opening and closing a solenoid valve to either allow or disallow pumping of the application. Electronic two-point controls can accommodate programmable ramps and setpoints.
There is a wide variety of vacuum pumps on the market, and this can unduly complicate the buying process. We urge you to consult the buying guide above for valuable tips and information that can help make you a more informed buyer. We have also showcased the best products below for even more shopping assistance.
Top rated vacuum pumps in 2019
Moisture in a refrigeration system is the reason for most of its problems. But there are some things you can do about it and which will prevent it. Moisture alone is bad enough to cause corrosion of metals but other gaseous molecules like hydrochloric acid and chlorine can also form. A vacuum pump removes the moisture as well as other gases from the system also lowering the pressure within the system. The best vacuum pumps reviews help you to find out the best vacuum pump for your refrigerator and air conditioner.
The FJC Vacuum Pump works very fast, pulling out gas molecules from refrigerators and air conditioners. This unit does not vibrate, it runs quietly, and is easy to set up. It removes non condensable gases and moisture very fast that can destroy any refrigerator or Air Conditioner. Its lightning design and durable construction allows you to use it for almost a lifetime. If you are trying to become a home mechanic for the weekend, go through best vacuum pumps reviews, and see why this is the best vacuum pump at an reasonable price.
“Just for precaution, I bought this vacuum pump, so I extend the lifetime of my AC system. I regularly use it when the air conditioning system starts having problems and it clears the AC of any gas build ups that might hinder its well functioning. The great operation of this model leads me to believe it’s the best vacuum pump 2019.” – Demetrius S. Williamson
Buy from Amazon.com for ($118.73)
Robinair ROB 15500
The VacuMaster high performance vacuum pump is mainly engineered for air conditioning, and fast refrigeration service. It is built with Robinair offset rotary vane for fast and thorough evacuation. This system provides powerful, high vacuum capability, and reduces evacuation time including moisture removal. It runs smooth and quiet; does not heat up or does not need cooling for its operations. This is an excellent system with over the counter replacement warranty, coming at a very cheap price.
“Robinair has designed a top vacuum pump through the ROB 15500 model. Using it extensively for many refrigerators and AC systems has made me realize its high quality. If you have problems with your home appliances this is the vacuum pump I recommend” – Andrew R. Thomas
Buy from Amazon.com for ($192.3)
Offering an option between 3 and 5 CFM capacity, the Zeny® D1-1090A@#JA0681 is a single-stage rotary vane type that employs R410a refrigerant, which is known to be environmentally friendly due to the absence of any ozone-depleting substances. If you need an economical means of isolating samples in the laboratory, this model is your best bet.
This vacuum pump operates with low noise and high efficiency. It is your best choice for demanding evaporation, filtration and drying applications that diaphragm pumps are not designed to support. The heavy-duty aluminum alloy casing is corrosion-resistant and ensures a lightweight overall build, while capably encasing all the sensitive inner components to save on expenses for replacements parts.
The oil drain plug is conveniently positioned at the bottom of the oil reservoir, effectively eliminating the need for any additional connectors to drain the old oil out. The internal cooling fan provides high volume movement of vapor for extended operations. The direct drive motor ensures easy start up and virtually maintenance-free use.
You can easily monitor the oil level through the convenient oil sight glass. The on/off switch ensures problem-free starting and stopping. The non-slip cushion handle enables easy portability. The exhaust cap on the exhaust port prevents ugly messes all around the unit.
The available inputs on this pump are R-12 and a larger one of the same type, according to one user. This makes the unit tricky to match with an existing manifold gauge set of a different variety. You will need a low side adapter to facilitate use so you can draw vacuum through the high side of your air conditioning system.
Buy from Amazon.com for ($54.99)
If you need a simple but powerful machine then do not look further as this vacuum pump will work better than any other pumps in the market. Best vacuum pumps reviews brought this product into the list for its quality and fast performance. You can also buy this pump for your office, business, or home usage as well. The job is done in a perfect way, quietly, and thoroughly. This package comes out at a price which slightly passes a hundred dollars. Nothing could be better than this vacuum pump at such a reasonable cost.
“I didn’t pay too much for Robinair 15310 vacuum pump and in the time I’ve put it to work, this model has proven to be very resourceful. It’s very easy to use and set up, making me certain I’ve invested in a premium model. I give it a five star rating!” – Luke Hawk
Buy from Amazon.com for ($102.45)
Yellow Jacket 93560
The Yellow Jacket has really great pull compared to other pumps. The quality of its construction is far better making it the best HVAC tool in the market. Most of the customers do not just think it of it as being an option; they believe this is the correct option. You can easily check the oil level through the oil sight glass. Moreover, the product is made in the U.S. assuring you the best quality in the world. Yellow Jacket costs a bit more than other vacuum pumps, but that is the price you pay for top quality.
“My refrigerator works better now that I use this vacuum pump from Yellow Jacket to remove the excess moisture from it. This device was bought by me after reading the positive feedback given to it by satisfied customers. The price I’ve paid for it was very affordable too.” – Chris Lindsay
Buy from Amazon.com for ($524.94)
Mastercool 90066 – no longer available
It is a sturdy, powerful pump with great working capability that you will need to evacuate your A/C or refrigerator. This system also works fine for operating a daily surge milker. This vacuum pump produces some watse; therefore, you certainly need proper ventilation or pipe to remove the waste. You need to change the oil used in the system regularly. In case of less moisture, you may have to change the oil once a year. The price is not too high, making it a favorite throughout the US.
“I knew about this model’s popularity from reading the best vacuum pump reviews and decided to invest in it. With it I manage to prolong the lifetime of my AC system in which I invested a lot of money. Many reputable reviews recommended this model, so it must be a top vacuum pump.” – John Collins