Whether you intend to use them in a commercial or industrial setting, diaphragm pumps are handy machines that are ideal for pumping high viscosity fluids in sanitary or chemical applications. These pumps can be very useful for those folks that love to be around RVs, spray rugs, camps, vans and other marine applications. Diaphragm pumps create a difference in pressure between chambers efficiently pumping fluid in only one direction. Needless to say, no one wants to spend bucks on some useless piece of equipment that cannot even last a month. It is for this reason, having adequate experience in diaphragm pumps, have decided to give you the best perspective by reviewing the Top 10 Best Diaphragm Pumps. At the end of this post, I am pretty sure you will spend your every single penny on a diaphragm pump you will always be proud of, year in year out.
Table of Contents
- Table of the Best Diaphragm Pumps
- 10. Roughneck 12 GPM Air-Operated Double Diaphragm Pumps
- 9. Roughneck 24 GPM Air-Operated Double Diaphragm Pump
- 8. FUELWORKS Heavy Duty Aluminium Diaphragm Pump
- 7. Happybuy Polypropylene 13GPM Air Double Diaphragm Pumps
- 6. Happybuy Aluminum 24 GPM Diaphragm Pump
- 5. Air Operated 120PSI Double Diaphragm Pump – Happybuy QBY4-25L
- 4. Happybuy 72GPM Chemical Industrial Double Diaphragm Pump
- 3. Ingersoll-Rand Multiport Double Diaphragm 13GPM Pump – ARO 66605J
- 2. Double Diaphragm NDP-25BAN Fluid Pump – YAMADA
- 1. Double Air-Operated Diaphragm Pump – Happybuy QBK-15PP
Table of the Best Diaphragm Pumps
10. Roughneck 12 GPM Air-Operated Double Diaphragm Pumps
The Roughness Air-Operated Pump is a top model that is easy to install and use. It can pump up to 24 gallons/min while operating at 115PSI at temperatures not exceeding 80deg F. For best performance, this unit works well with low viscosity petroleum fluids such as waste oils, kerosene, and diesel owing to the built-in elastomer of Nitrile. Note that it cannot be used with gasoline. For solid performance, Roughness Air-operated Diaphragm Pump features a double-acting seal and a high-end glyd ring. To close on unmatched performance, an all-bolted construction and air distribution system that is serviced externally are well incorporated into the pump. To simplify operations, a 14inch air inlet is fitted with NPT fittings and uses the regular shop air.
- Flow rate 24GPM
- Max pressure 115PSI
- Includes Elastomer Nitrile diaphragm
- NPT fittings 1/4inch air inlet
9. Roughneck 24 GPM Air-Operated Double Diaphragm Pump
This is another outstanding model from the Reputable Roughneck brand that will get petroleum fluids flowing. Just like other Roughneck models, it doesn’t work with gasoline but can be used with kerosene, diesel and some waste oils. Expect a flow rate of 24GPM while operating from 29 to 115PSI. The pump is capable of pumping up to a maximum of 80 degrees F. it also has the nitrile diaphragm for optimal performance with low viscosity fluids. More adorable is the solid cast aluminium construction that will last for ages, even your granddaughters will surely know you loved diaphragm pumps. Additionally, Roughness 24GPM pump uses NTP 1inch air inlet. Overall, it is a great pump for the price.
- Heavy-duty solid cast aluminium
- Nitrile diaphragm
- Max Temp 80 degrees F
- Measures 17in.L x 15in.W x 12in
- Flow rate 24 gallons per minute
- Suitable for low viscosity fluids
8. FUELWORKS Heavy Duty Aluminium Diaphragm Pump
The Fuelworks 24GPM 17151200 is a model that revolutionized the hardware industry from 1992. Crafted from high-quality aluminium, this pump does a pretty decent job and lasts as well. It will handle several applications including water treatment, coating material, mining, metallurgy, petroleum, printing and much more. Maximum pressure is set at 115PSI/8BAR. It is unbelievable how Fuelworks 17151200 still kicks when at suction heights of 10FT/3M with its 164FT head. For superior performance, both the O-ring and elastomer boasts nitrile material. An all-bolted construction plus the externally services air distribution system are well integrated into this air-operated diaphragm pump. You can use Fuelworks to handle oil fluids, grease, diesel, and kerosene.
- Nitrile diaphragm
- 24GPM flow rate
- Can be used in several industry applications
- Max suction height 30Ft.
- 1inch air inlet
7. Happybuy Polypropylene 13GPM Air Double Diaphragm Pumps
Happybuy is another top-in-the-line model that will handle almost any industrial application. Capable of pumping fluids at 13GPM at maximum, this pump features the best heat, chemical and abrasion resistance. Apart from being durable, it also boasts an all-bolted construction and an externally serviced air distribution system. You will forget you will ever have to deal with fluid leaks. The pump has 1/4inch FNPT air inlet. Plus, another adorable aspect that makes Happybuy QBY-15PP stand out from the rest is the polypropylene construction that will withstand all harsh conditions. Overall, if you are looking for an outstanding diaphragm pump that will handle general acid and alkali fluids, look no further.
- Polypropylene construction
- Max flow speed 13GPM
- Maximum 100PSI
- 1/4inch FNPT air inlet
- Widely used in several applications
- Handles water fluids and biodiesel
6. Happybuy Aluminum 24 GPM Diaphragm Pump
A positive pump that boasts of the best shut-off valves on either side of the diaphragm. Commonly referred to as the membrane pump, Happybuy QBK-25L is an air-operated double diaphragm pump that operates within the 29-115PSI range. At maximum, it can pump 24 gallons per minute while operating at 80 degrees F. It boasts a unique combination of Teflon, rubber and thermoplastic diaphragm, the reason for its unmatched reciprocating action. It is highly suitable for use with water and other low viscosity petroleum fluids.
- Aluminium construction
- Flow rate 24GPM
- Best reciprocating diaphragm action
- Can be used with low-viscosity fluids
- Works at 115PSI at maximum
- Maximum Temp 80 degree F.
5. Air Operated 120PSI Double Diaphragm Pump – Happybuy QBY4-25L
Compared to other Happybuy models, the Double Air-operated QBY4-25L Pump features a number of improvements. It is capable of withstanding more harsh conditions and operates at 150 degrees F. at maximum. It is an air-operated pump featuring well-crafted aluminium construction. When used with low viscosity petroleum fluids and water, this pump delivers a great performance. Both the inlet and outlet port measure 1inch. A unique combination of rubber, Teflon and thermoplastic shut-off valves gives this pump an edge against its competitors. Note that this pump shouldn’t be used with acid-base solvents as this could cause damage.
- Solid aluminium construction
- Works great with low-viscosity fluids
- 120PSI at maximum
- The flow rate of 35GPM
- Double air-operated diaphragm pump
4. Happybuy 72GPM Chemical Industrial Double Diaphragm Pump
Happybuy QBY4-25PP is another commercial-grade model designed to pump low viscosity fluids at 72GPM. It is with no doubt that is a high-end diaphragm pump capable of operating at a maximum temperature of 150 degrees F. Besides, it is constructed from high-quality polypropylene and works at maximum PSI of 120. It is an air-operated pump that is perfect for use with particular waste oil, motor oil, kerosene, motor oil, and diesel. Most amazing is its heat, chemical, and abrasion resistant. Furthermore, the all-bolted construction prevents fluid leaks during operation. Even though Happybuy QBY4-25PP is one of the most efficient air operated diaphragm pumps, it should not be used with solvents.
- Highly versatile
- Efficient – No stall operation
- Max suction height 5m
- Max PSI 150
- Double diaphragm
- Polypropylene ball seat
3. Ingersoll-Rand Multiport Double Diaphragm 13GPM Pump – ARO 66605J
Even though not popular, the ARO Multiport Double Diaphragm Pumps is a unit that performs incredibly well in various applications. It is an air-operated pump that boasts a flow rate of 13GPM. The body is crafted from polypropylene material while balls and diaphragm are PTFE. For improved performance, the fluid caps are polypropylene. Overall, this pump works well when used in regular industrial or personal applications.
- Double diaphragm
- Max PSI 150
- 1/2inch NPT fluid connection
2. Double Diaphragm NDP-25BAN Fluid Pump – YAMADA
From the popular YAMADA, the NDP-25BAN is an outstanding piece of equipment that does a pretty decent job. Most adorable is the all-bolted construction that does away with leakages and also prevents the need to reassemble the unit. Apart from featuring a high suction lift, this unit can be put into several industrial applications. It has a flow rate of 42.6GPM and 3/8” FNPT inlet. The BunaN Flat Check valves/O-Rings optimizes performance in any application. More prominent is the air silencer that keeps the noise level low. To sum it up, YAMADA NDP-25BAN is a highly efficient air-operated diaphragm that works great with most low-viscosity fluids.
- 46.2GPM flow rate
- Bolted construction
- Available in various materials
- Non-metallic centre
1. Double Air-Operated Diaphragm Pump – Happybuy QBK-15PP
Pick performance from a compact package are the best words to describe the Happybuy Double Air-operated Pump. Even though not as powerful as other Happybuy models, the QBK-15PP boasts an exclusive reciprocating action resulting in unparalleled performance. The body is constructed of Polypropylene for reliable durability. With a flow rate of 12GPM, this pump operates at a maximum PSI of 120 and maximum temperature of 220 degrees F. if you are looking for a double diaphragm pump that works great with water and other low viscosity fluids such as kerosene, diesel, some waste oil and motor oil, look no further.
- 1/2inch NPT Inlet/Outlet
- Max PSI 120
- Polypropylene body construction
- Max Temp 220 degree F
- Double Diaphragm