Top Rated 7 Best Diaphragm Vacuum Pumps In India (Review & Buying Guide) May 2022

Welcome to my blog: Best Diaphragm Vacuum Pumps In India

A diaphragm vacuum pump is a simple and convenient way to evacuate a system and is capable of generating a vacuum within seconds.

Additionally Find: Best Water Pumps In India

A diaphragm pump uses a membrane (or diaphragm) to produce a partial vacuum inside a chamber or cylinder. The vacuum is generated by placing the membrane between two chambers, one of which contains the fluid to be evacuated. As the pressure on one side of the membrane increases, it deforms and moves the fluid on the other side of the membrane. 

The deformation of the membrane can be used to drive a mechanical system or can be coupled to a plunger which displaces air, generating an even lower pressure in the process.

The main advantage of this type of pump is that there are no moving parts inside the pump to wear out or have failure modes. It also has very low power consumption, typically 200W at 100 kPa, although there are exceptions that are much more efficient. 

The main disadvantage is that it requires special equipment to work with gaseous or liquid media that does not compress or expand under pressure.

In this article, we will review the 7 best diaphragm vacuum pumps in India with a buying guide. So when you want to buy a diaphragm vacuum pump in India, take a look at this article.

Here’s The List Of The Best Vacuum Diaphragm Pumps In India

Best Diaphragm PumpsPrice (Approx)Buy Now
Diaphragm Pump FL3216 DC12V14000/-Amazon
Diaphragm Pump, DC12V Transfer Pump11000/-Amazon
Diaphragm Water Pump11000/-Amazon
Ecomspace 55 Series RV Marine Diaphragm Pump17000/-Amazon
Liujaos Diaphragm Water Pump11000/-Amazon
Miniature 24V Diaphragm Vacuum Pump6500/-Amazon
Fl-34/35 Dc 12V Water Electric Diaphragm Pump7900/-Amazon

Diaphragm Pump FL3216 DC12V

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1 Diaphragm Pump
Diaphragm Pump

The Diaphragm Pump FL3216 is a cost-effective, high-precision diaphragm pump with a working pressure of 16bar. It is suitable for bi-directional circulation, liquid supply or liquid discharge. 

The diaphragm pump features an automatic voltage regulation mechanism, which will regulate the voltage input at 220V±5%. That is to say, the pump will run smoothly even if the input voltage changes. 

The FL3216 has an overpressure relief valve at the bottom that can automatically control the maximum operating pressure, ensuring safe use. The pump has a metal cover to protect it from dust and debris.

These Diaphragm pumps are widely used in chemical, textile, food, pharmaceutical, metal processing and other industries.

Specifications:

  • Rated voltage: AC220V±5% 50/60Hz
  • Rated power: <1W
  • Max. operating pressure: 16bar

Diaphragm Pump, DC12V Transfer Pump

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2 Diaphragm Pump
Diaphragm Pump

The Salinr Diaphragm pump is a positive displacement pump. It consists of a plastic diaphragm that forms a watertight seal with the pump housing and is moved up and down by the motion of the piston. 

The diaphragm is connected to the piston by an elastomeric material, which acts as an energy absorber.

When the diaphragm is pushed down by the piston, the water pressure on the other side pushes it back up. As the process repeats itself, water is transferred from one point to another.

The two major benefits of using this type of pump are that it is quiet in operation, and there are no seals to wear out. This makes it an ideal pump for use in aquariums or water features, where the user wishes to avoid making too much noise or where maintenance would be difficult.

Specifications:

  • Model No.: SAL-10H
  • Power:220-240V/50Hz
  • Voltage Regulator: Yes
  • Current : 0.4A
  • Maximum Head: 12m
  • Maximum Pressure: 8MPa
  • Flow Rate: 1.8L/min
  • Aperture Size: 10 mm
  • Max. Water Depth: 10 m
  • Power Cord Length: 1.5m

Diaphragm Water Pump

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3 Diaphragm Pump
Diaphragm Pump

The Diaphragm Water Pump is a simple and practical pump, which is widely used for irrigation, drainage, domestic water supply, car washing, car washing, watering plants and so on. 

It is suitable for the work of low pressure, which can be applied to the water output of 0.1Mpa-0.8Mpa.

Specifications:

  • Outlet Diameter: 9.5mm
  • Outlet Type: Male thread
  • Cable Length: 1.5m
  • Head Pressure: 0.05~0.09Mpa
  • Motor Type: DC12V

Ecomspace 55 Series RV Marine Diaphragm Pump

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4 Diaphragm Pump
Diaphragm Pump

Ecomspace 55 Series RV Marine Diaphragm Pump is highly efficient, multiple diaphragm pumps are used for high volume water transfer or drainage applications. 

Diaphragm pumps are air-operated positive displacement pumps that are self-priming. It has a 5-chamber diaphragm. The diaphragm chambers are made out of rubber.

Specifications:

  • Spring tensioned valve, air vent valve, pressure relief valve, overload protector, and check valve are all included in the pump head. 
  • The diaphragm is made of virgin rubber compound to ensure maximum strength and durability. 
  • The pump housing is made out of high-quality cast iron to ensure a long life span. Cast Iron is widely used in the construction industry due to its ability to withstand high pressure and high-temperature environments.
  • The diaphragm pump is easy to install, portable, compact, and appropriate for various applications.

Liujaos Diaphragm Water Pump

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5 Diaphragm Pump
Diaphragm Pump

Liujaos Diaphragm Water Pump is a kind of pumping machine designed with a piston-type pump and a diaphragm to deliver liquids.

The diaphragm is made of rubber or silicone rubber, which has high elasticity and resilience. 

When the piston is moved back and forth, the pressure will be evenly distributed along the surface of the diaphragm, causing the entire diaphragm to be deformed. In this case, the diaphragm will be separated from its seat on one side by a certain distance. 

The liquid in the suction chamber will then flow into the delivery chamber through the clearance between the diaphragm and seat. The driving force of a piston pump is kinetic energy, which arises from a change in pressure of the medium on the outside of the movable parts.

The most widely used diaphragm pump is used for home cleanings, such as window cleaners and pressure washers because they are easy to use and very convenient.

Specifications:

  • 120W, strong power output, the maximum lift is 130m.
  • The product has stable and reliable performance and long service life.
  • Products are widely used in: high pressure washer, water spray, pesticide spraying, garden watering, filling machines and other equipment.
  • The product is compact and easy to install.
  • The theoretical value of pump flow can be 10L/m.

Miniature 24V Diaphragm Vacuum Pump

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6 Miniature 24V Diaphragm Vacuum Pump
Miniature 24V Diaphragm Vacuum Pump

The diaphragm pump is a kind of mechanical vacuum pump that uses the diaphragm and the connecting rods to produce a vacuum, and the piston is driven by the gas pressure difference between the inlet and outlet to drive the diaphragm back and forth. 

The inlet and outlet are connected with elastic diaphragms, when there is a high pressure outside the chamber, the diaphragm deforms inwardly (a vacuum chamber is formed in the middle), and when there is high pressure inside the chamber, the diaphragm deforms outwardly (the vacuum chamber collapses). 

The suction and discharge valves are connected with each other by a flexible pipe and they can be adjusted separately. There are two types of diaphragm pumps: one is the single-piston type and another one is the double-piston type. 

The former type has a single-piston structure while the latter has a double-piston structure. In general, the single-piston structure has better flow characteristics than the double-piston structure. In addition, according to the material of the piston, there are metal piston type and plastic piston type.

Specifications:

  • Small size, strong structure, and long serving life
  • Chemical stability
  • Widely used in instruments and equipment, medicine and chemical industry, home appliances and other fields.

Fl-34/35 Dc 12V Water Electric Diaphragm Pump

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7 Water Electric Diaphragm Pump
Fl-34/35 Dc 12V Water Electric Diaphragm Pump

The Fl-34/35 Dc 12V Water Electric Diaphragm Pump is an efficient way to pump water, because it uses a diaphragm to move the water instead of using hoses. 

The diaphragm is flexible, so it can fit into the tightest corners and reach into hard-to-reach places. 

Its efficient design allows it to produce 12V of power, which is enough to pump water at a rate of 20 gallons per minute. 

The Fl-34/35 Dc 12V Water Electric Diaphragm Pump is most commonly used in conjunction with a standard water faucet.

Specifications:

  • Permanent magnet and intermittent duty
  • Built-in pressure switch automatically starts or stops pump when faucets is opened and closed
  • Self-priming so pump can be located above water tank
  • Can not runs dry for extended periods of time

Buying Guide- Best Diaphragm Vacuum Pumps

Factors that you have to consider before buying a diaphragm pump are:

Pump Composition:

A diaphragm pump is composed of a pump casing with the pump shaft, diaphragm, pump stem, check valves, and other fittings.

Pump Operation:

The pump is operated by external pressure. For example, if the pump is immersed in water, the water pressure acts on the diaphragm. Thus, the diaphragm moves the pump stem. The pump stem rotates the pump shaft. The pump shaft rotates the check valves. Thus, the fluid is pumped. The pump receives pressure from the fluid itself. Thus, the pump is self-priming.

Durometer:

The hardness of the diaphragm depends on its durometer. The hardness of the diaphragm is determined by the amount of vulcanized rubber in the diaphragm.

Shape:

The shape of the diaphragm is important when it is in contact with the fluid. The diaphragm should be made in such a way that when it is in contact with the fluid, it does not allow the fluid to penetrate the pump. Thus, the diaphragm must be impermeable to the fluid.

Materials:

The materials used in the diaphragm pump are steel, cast iron, copper, brass, bronze, aluminum, plastic, rubber, and other materials.

Applications:

Diaphragm pumps are used in chemical plants, food plants, oil plants, mines, water plants, nontoxic plants, etc.

Advantages of Diaphragm Pumps are:

  • Seal-less and oil-free
  • Self-priming up to 6 meters
  • Simple cleaning/maintenance
  • Versatile design and function (can handle most media types)
  • Can run dry for short periods

Disadvantages of Diaphragm Pumps are:

  • Low maximum speed
  • Not very energy efficient
  • Pulsed flow – requires dampener for reduction

Frequently Ask Questions-Best Diaphragm Vacuum Pump:

1. What does the diaphragm do in a vacuum pump?

A. The diaphragm expands as the vacuum expands. The vacuum is created by the pressure of the liquid being pumped on the outside of the diaphragm, which causes it to expand. This expansion increases the area of the inside cavity, hence decreasing the pressure difference between both sides of the diaphragm, and as a result, the pressure difference between both sides is decreased.

2. Can I use cast iron to construct diaphragm pumps?

A. No, cast iron has to be preheated before it can be used in a vacuum pump. It is very difficult to achieve thermal equilibrium in cast iron during cooling due to its slow rate of thermal conduction. Thus, cast iron should not be used to construct diaphragm pumps.

3. Can I use brass to construct diaphragm pumps?

A. Brass is also unsuitable for constructing diaphragm pumps. It is an alloy whose mechanical properties are affected by temperature.

4. What is the maximum allowable temperature for a diaphragm pump?

A. This depends on the materials used in making the diaphragm and other components of the pump. If there are any doubts about this, consultation with an expert is recommended.

5. What are ball valves used for in diaphragm pumps?

A. They are used to control flow in vacuum pumps. The valve design is critical for vacuum pumps because the flow has to be controlled precisely at very low flow rates (e.g., less than 0.1 GPM). Because valve designs vary significantly between manufacturers, valve replacement should be done only by the manufacturer or its authorized service agents.

6. What are ball valves made of?

A. They are made of glass or ceramic material which have a very low coefficient of friction thus minimizing frictional losses during operation of the valve and maximizing performance characteristics of vacuum pumps significantly.

7. What are check valves made of?

A. They are made of stainless steel or other material that can withstand high temperature and pressure conditions present within vacuum pumps during operation at high vacuum levels (e.g., 10 microns)

8. What are check valves used for?

A. They are used to prevent back flowing of liquid through vacuum pumps when there is no liquid flowing through lines connected to the pump outlet during periods when the pump is operating at high vacuum levels (e.g., 10 microns) or when there is a large volume of liquid being pumped out from storage tanks/vessels, etc.

Conclusion

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