Difference between Magnetic Driven Centrifugal Pump & Mechanical Seal Centrifugal Pump

It’s undoubtedly a difficult choice to make between a magnetically driven centrifugal pump and a mechanical seal centrifugal pump! To save you some time and constant Google searches, let’s give you a gist about the main comparison between the two: 

  • Sealing the fluid

In the sealed centrifugal pumps, the presence of a mechanical seal prevents fluid leakage even while the water pump is in operation. On the other hand, magnetic water pumps do not require a seal since it has a containment shell at the end that ensures a safe enclosure for any leakage to happen. 

  • Maintenance cost and life

In sealed centrifugal pumps, there is a continuous movement between the parts which are in close contact with each other. This arrangement results in easy wear down of the elements and hence, constant maintenance costs. But, because the magnetic submersible motors do not contain any seal, there’s no need for replacements, which costs less. 

  • Application of fluid types 

The mechanical centrifugal motor is capable of pumping out some hazardous fluid, but there’s always a scope for leakage there. Whereas, magnetic pumps due to their inherent design are comparatively safer for hazardous liquids as there is zero scope of leakage. Also, hazardous liquids are generally more expensive and require safe use, which proves magnetic pumps to be more effective for the purpose. 

Vijay Engineering and Machinery Company, one of the best pump dealers in Mumbai, provides a wide range of Kirloskar pumps like submersible pumps, water pumps, submersible motors, etc. Click here to know more about the products and services we provide! 

Difference Between A Centrifugal Pump And A Vacuum Pump


Centrifugal pumps and vacuum pumps differ from each other for multiple reasons, and here is the detailed explanation for both that reflects those reasons: 

Centrifugal Pumps 

Popularly known as hydrodynamic pumps and dynamic pressure pumps as well, centrifugal pumps are manufactured by making use of the primary centrifugal forces. The flow happens when the kinetic energy produced with the help of a rotating turbine or electric motor is turned to pressure in the liquid. 

If kept in comparison with a vacuum or any other pump for a fact, these water pumps are easier to install. Unlike others, they are manufactured with the help of the back pullout-design process. When a repair is required, the parts can be taken apart and restarted within a short period.

Vacuum Pumps 

Vacuum pumps are those types of submersible pumps that are used to pump out the gases, leaving a partial vacuum aside. While choosing the best vacuum pump among many, the flow of air removal in the pump, the amount of vacuum that is produced, and the power required to create the vacuum are some of the factors that need to be considered. Keeping this in mind, it’s mandatory that the manufacturers should provide information on flow-rating availability. 

When put in comparison with other pumps used in submersible motors, vacuum pumps have comparatively lower power requirements. For continuous pumping, large-sized vacuum pumps are put to use. The only drawback that vacuum pumps have that centrifugal motor doesn’t is that they get overheated if put in continuous use. 

Be it centrifugal pumps or submersible motors, VEMC provides only the best and proves that it is one of the renowned pump dealers in India and the trustworthy distributors of the reliable Kirloskar pumps. Whether it is the best water pump dealers in Navi Mumbai or topping the list of pump dealers in Vashi, VEMC has never failed to excel. Check out our website for more!

On-Grid or Off-Grid

Many people think that whenever one switches to solar energy, the only option they have is to install an off-grid system, especially in rural areas, where extending the power lines is difficult and expensive. But before you make a hasty decision, a better idea is to consider the two options in front of you- off-grid solar system and on-grid solar system. 

Here are a few differences between the two: 

  • On-grid basically means that your solar system is connected to the local company’s system eg. MSEDCL, Adani, BEST. Generally, residential homes opt for on-grid solar systems where there are good grid parity and lesser downtime. Whereas, the off-grid system means that you’re not connected to any utility company. 
  • Using the on-grid system, the extra energy produced that’s not used by you will be stored in the grid’s power company. This stored energy will act like a credit that can be cashed out at the end of the year as per the local distribution norm. Whereas, using an off-grid system, you’ll need to install a backup battery for storing energy this way. As there is no good parity and a higher electricity outage dependency on battery storage of electricity which makes more sense and has longterm financial viability. But the challenge is that this battery is rather expensive thus increasing the cost spent on installing the off-grid solar systems.
  • Though over the next 5 years the cost of battery storage shall be reduced due to the higher scale of economic order quantity. 

So stay calm! Leave the extra work to Vijay Engineering and Machinery Company, the best solar EPC consultants in Thane. We will ensure that you get the services that will benefit you the best- so whether it is choosing the right grid system or its proper installation; we are at your service!

What is an Isolation Valve, and in what conditions is it used?

An isolation valve is used to manage the flow of fluids in the plant process and prevent it from flowing to a specific location. The primary purpose is to prevent the flow of contaminated components such as blood, pharmaceuticals, or any medical devices.

Isolation valves come to use under multiple circumstances and for various technical equipment as stated below: 

  • Firewater control 

Firewater pumps are extremely risky and dangerous to handle, especially when they need to be removed. But, isolation valves ensure the safe removal of firewater control pumps and prevent any impact on the entire system of the centrifugal motor.

  • Pipeline safety

The blockage of drain lines or water pumps is quite a common issue due to ice or hydrate formation. The worst cases might even include an uncontrollable situation where the submersible pumps freeze open and are impossible to be shut back again. To avoid such mishappenings with the motor, isolation valves could be installed between the inventory and expected leakage area of the submersible motors, eliminating the scope of any leakage in the future. 

  • Oil and gas wells

Valves in the oil and gas industry ensure confidence and reduce any unforeseen risks. Every industry or plant must adhere to the safety and health guidelines provided as per the government, where oil and gas industries are quite prone to damage to the environment. Even a small gas leak in centrifugal pumps can lead to substantial environmental concerns in the future. The stem seal designs of isolation valves prevent any such leakage and ensure adherence to the social and environmental guidelines. 

Hailed as the best pump dealers in Mumbai, Vijay Engineering and Machinery Company is regarded as one of the most reputed pump dealers in India and trustworthy distributors of the reliable Kirloskar pumps. From being regarded as the best pump dealers in Navi Mumbai to being the trusted pump dealers in Panvel, VEMC lives by its principle to never compromise on what is best for its customers. Check out our website for more!

What is a water hammer? What are its ill effects?

A water hammering  effect happens when a sudden closure of the valve causes the back and forth movement of water at supersonic speeds. Water hammer is an understudied topic, and unaware of the fact that residentials have it in their submersible motors, nobody seems to care. In the light of water hammer- for residentials, it’s just that loud noise when the submersible pumps are shut. 

Having said that; a water hammer could have some adverse effects as stated below: 

  • When a centrifugal pumpset suddenly shuts at any given site, the mass of water before closure will still be moving, hence a high pressure shall be created, resulting in a shock wave. This process makes a similar hammering sound that one often hears after shutting their centrifugal pumps.
  • In the worst case, water hammers can even cause the pipelines to break if the pressure is too high. For safety purposes, air traps are often installed to absorb the damaging factors caused by high pressure.
  • The water hammer can also harm valves and pipes in case of any water, oil, or gas application. This happens in the same process of high pressure, as mentioned above, which causes a spike, thereby damaging gauges. This can occur even if the gauge has a correct pressure range for the flow application.

To avoid these adverse effects of a water hammer, air chambers prove to be quite useful because they soften the impact and hence prevent the hammer effect.

But you can swiftly avoid the chances of a malfunctioning water pump, by opting for the high-efficiency Kirloskar pumps that Vijay Engineering and Machinery Company, the best pump dealers in Mumbai, promise to provide to you. Counted amongst the reputed pump dealers in India, VEMC is the answer to your problems!

In which direction does water enter the centrifugal pump?

So, how does water enter the centrifugal pump? Well, there are different ways in which it makes it to the eye of the impeller in the pump:

  1. End suction and top discharge centrifugal pump:

 In this arrangement, the water enters the impeller horizontally and then proceeds to discharge vertically from the top of the pump, a good example of which is the single stage horizontal centrifugal pump popularly known as end suction back pull out pumps

  • Top suction and top discharge centrifugal pump:

The water both enters and discharges from the top of the pump,i.e. top half of the casing  something which happens in a boiler feedwater pump.popularly known as Multistage pump.

  • Side suction and side discharge centrifugal pump:

Here, the water both enters and exits from the same direction, but in this case, it is from the side.i.e. bottom half of the casing. A classic example of this type of arrangement is an axial split horizontal centrifugal pump. Popularly known as side suction side discharge pump

No matter which method is employed, they are available in a variety of options and are applicable in several applications.

So, if it is centrifugal pump you seek, VEMC stands by its promise to provide only the best to you as the renowned distributors of the reliable Kirloskar pumps, making it one of the best pump dealers in Navi Mumbai, Mumbai and Raigad Districts

Incidently we are also the Master Distributor for process pumps for entire West and Central zone.

Happy pumping as it is a way of Life at VEMC

What will happen if the speed of the centrifugal pump doubles, keeping other parameters the same?

What happens if we increase the speed or rather double it, keeping the other parameters constant? This is what will happen:

It is governed by the Affinity Laws (Laws of Similitude)

Flow ( Q ) is directly proportional to the ratio of the speed

Head ( m ) is directly proportional to the square of the ratio of the speed

Power required is directly  proportional to the cube of the ratio of the speed

Eg.  If flow and head is 10 m^3/hr and 10 m @ 1450 rpm respectively

        Then @ 2900 rpm the flow shall be 20 m^3/hr and head shall be 40 m.

Hence, increasing the speed of water pumps or doubling it without a proper understanding of the consequences that it will have on the pressure and flow of the pump can lead to the entire system to fail.

But when it comes to Vijay Engineering and Machinery Company, you can rest assured that you will be given the best service by one of the trusted pump dealers in Mumbai, who are renowned for providing a wide range of high-quality Kirloskar pumps.

Vijay Engineering and Machinery Company, one of the best pump dealers in Mumbai, provides a wide range of Kirloskar pumps like submersible pumps, water pumps, submersible motors, etc. Click here to know more about the products and services we provide

Power Cuts: Are Solar Panels Efficient Enough To Handle Them?

Solar energy is the best alternative energy in our homes. It is efficient, clean as well as abundant, and it is not used up. However, its only drawback is the reduction of efficiency during rainy and cloudy days. Because of its increased demand, there are a lot of Doing It Yourself at-home solar energy systems in the market. This makes it easy for you to generate energy to power your home at your property.

However, before you can decide on buying the product, you should do some initial evaluations. Home solar energy systems will require investments, and you will wish to recoup your investment within an affordable time frame. During the solar panel installation period, you do not need to move your family out to another house, and this is likely to cause you extra costs required for dismantling and rebuilding the system.

Therefore when it comes to installing the solar panel, there are some mysteries involved. Like other things, the easiest method will arise from doing some research to get the best recommendations tools as well as products. Then after getting that, you can get down into putting down your effort.

Solar panels have some problematic tasks in accomplishing and installing the panels around your home. However, the solar panels are great to help in reducing the monthly electricity expenses significantly. To some extent they can eliminate the costs wholly based on the size of the solar panel selected and the amount of power you require and use at home.

Today, everybody who does not live under rocks or in a cave understands that solar panel has overtaken the leaps as well as bounds for many months. On the contrary, the fact remains this has been happening for the longest time possible. This means that the solar, panel still plays a significant role in increasing energy in the future and reducing the power consumption expenses.

The costs of remaining dependent fossil fuels instead of that of renewable had started to increase. However, sun and wind still can provide the ever-increasing portion of day to day energy for the consumers, especially those who are vulnerable to electricity.

Solar panel, regardless of one or dozens, they reduce the cost of electricity significantly. It, however, does not matter whether the solar panels are manufactured commercially or made for homeowner use.

With the availability of many solar panels suppliers, and the decreasing of the prices of the solar panel. Solar power has started to make sense each day. It is not only the electricity prices that should drive you to the use of solar panels. It is with no doubt that lowering your monthly electricity bill is a great attraction to more benefits that accrue. This is because of the ongoing deployment and use of solar power.

Creating your solar panels is very easy, and it is during this time that you will realize the best cost-saving strategy. It is not only the costs of solar panels installation that are low compared to that of the commercial model, but you can also install one as soon as possible while adding others at the time when your family budget allows you to do so. Once your first panel starts working, you will start seeing the saving that it brings to you through reduced electricity bills

Finally, installing a solar panel at your home is the best way of reducing the monthly electricity bill expenses. Therefore it is worth your money. Although it may be hard to know which one is suitable for your home, you should consult experts to ensure you select the best solar panel since the set up will last for many years.

How To Decide – Reciprocating Compressor or Screw Air Compressor

Elgi Screw Compressor & Reciprocating Compressor

In recent times, more and more industries rely on compressed air and are, sometimes, called the 4th utility of any industry. When looking for an air compressor, there are different types of compressor like Reciprocating compressor, Vane Compressor, Screw Air Compressor, Diaphragm Compressor, Centrifugal Compressor, and so much more. We will talk about the 2 popular types of compressor, namely the reciprocating and screw air compressor (also known as the rotary compressor). Users often get confused between these 2 variants during purchase; however, in order to make the correct decision, you will need to understand how they operate.

Reciprocating Compressor

In a reciprocating compressor, air is taken into a cylinder and then compressed to a higher pressure with a piston using reciprocating motion (much like an engine). Piston compressors are the most common type of compressor used in most industries because of their lower capital investment. These compressors, however, make a lot of noise and vibration. As the compressor operates on reciprocating motion, there is pulsating air produced, which causes the inlet and outlet valve blades to open and close multiple times a second, making higher noise levels. Most air compressors manufacturers provide an allowable duty cycle of 60%-70%. That said, a general recommendation is that when your compressor is idle for more than 50% of the time, it is best to go for a reciprocating compressor. Piston compressors are usually oversized to allow some idle time as they operate at higher temperatures. BAC Reciprocating Compressor ranges from 0.5HP to 20HP and are manufactured to industry standards to withstand above 70% duty cycle.

Screw Air Compressor

Screw air compressor consists of 2 rotors, rotating in the opposite direction, compressing air between the lobes to a higher pressure. Since the rotors are rotating and not reciprocating, there is minimal vibration, wear, and downtime compared to a reciprocating compressor. In a reciprocating compressor, there is a high friction loss between the piston rings and cylinder compared to a screw compressor where their rotors are non-contact. The air produced is continuous and prevents the inlet and outlet valves opening and closing continuously, thereby reducing noise to significantly lower levels. Screw compressors are especially good in medium-scale and large-scale industries where there is a continuous requirement of air. These compressors do not prefer idle time and long periods of idle time, which sometimes causes issues. Rotary Screw compressor requires a higher capital investment, but provides better efficiency and faster ROI. There are 2 types of screw air compressor fixed speed and variable speed compressors, each having its own advantages. BAC’s screw compressors currently range from 7.5 hp to 60 hp, and also provide custom combinations for getting the best out of your investment.

If you are in search for a reliable and professional supplier of Reciprocating or Screw Compressors, you can contact Vijay Engineering And Machinery Company – the Authorised Distributors of Elgi Compressors and Spare Parts.