What are Valves? What are their types and applications?

No matter which supply system you are talking about, one piece of equipment is absolutely indispensable — valves. Why are these so important for the proper functioning of your supply system and which valves suit your needs the best? In this blog, we touch upon all these fundamental questions about these ingeniously simple yet essential instruments.

Valves are simply instruments that control, regulate or direct the flow in a supply system. These are used in pipelines carrying liquids such as water, oil, and chemicals, or gases such as natural gas and cooking gas. The most basic function of valves is to completely start or stop the flow. However, they are also used to regulate the flow or pressure, throttle the flow rates, and improve safety by relieving pressure or vacuum in the piping system. Valves also prevent a backflow of the liquid or the gas. Let’s take a look at some of the main types of valves and their unique applications.

  1. Ball Valve: These have a quick-acting 90-degree handle to provide easy on-off control. These are faster and easier to operate as compared to other valves as they do not require a protracted winding action. These valves are mostly used in refineries, fertilizer plants, petrochemical processes and thermal power stations.
  2. Butterfly Valve: These have a characteristically compact design and are therefore best suited for cramped spaces. Their name comes from the wing-like action of the disc which operates at right angles to the flow. These find use in sewage plants, chemical processing and petrochemical plants.
  3. Spindle Valve: These valves have the simplest mechanism as they merely require twisting of the spindle wheel attached to the spindle rod. This moves the gate at right angle to the flow and stops it. These valves are mostly used in water supply.
  4. Foot Valve: A foot valve is typically installed at a pump or bottom of a pipe. These have an open end with a shield or screen over them to keep out debris. These can be found installed in ponds, lakes and pools on a pump. They let the liquid to flow in but prevent it from flowing back out.
  5. Sluice Valve: A sluice valve is a large valve with a rectangular or circular gate. On rotating the spindle, the gate slides across the opening. These valves find wide application in water works, effluent treatment, shipping, irrigation and thermal power plants.
valve dealers

Choosing the right valve for your operations is an important decision to ensure seamless flow and regulation of your piping system. The right valve can be chosen on the basis of valve design, valve size, and actuation method. For more information on our products, feel free to contact us on +91 98199 07445. We would be happy to assist you in finding the best match, based on your requirements. As one of the leading valve & water pumps dealers in the country, VEMC provides seamless end-to-end services to its clients. VEMC is ISO 9001:2015 certified and a pioneer in the field of electromechanical engineering products, allied equipment, and services.

VEMC at 73: Recollecting the Years Gone By

On 11th August this year, VEMC turns 73. A business spanning the better part of the last century speaks volumes about our experience, expertise and competence. On the occasion of our 73rd anniversary therefore, we decided to take you down the memory lane by recollecting the years gone by.

Vijay Engineering and Machinery Co. was founded in 1948 by Late Shri Sharad Kumar Shah along with Late Shri Rajaram Shinde, both entrepreneurs par excellence with a penchant for engineering and machinery. Their first office was a 100 square feet room at Commerce House in Ropewalk Street Bombay. During those days, erratic electricity even in urban and commercial areas, often compelled users to look for alternatives for running their equipment. The company saw this as an opportunity worth exploring and participated in an import auction of Petter Field Engines. The product, owing to its high quality, turned out to be a great success and gave VEMC a spectacular start.

During the 1950’s, VEMC made its way to various government projects and forged associations with many renowned companies. These included Kirloskar Brothers, WRT Talwalkar Pvt. Ltd., Bush Electricals and MICO Full Injection Equipment Company. The diverse nature of these projects vastly added to our product basket and also to the depth of our client profiles. Strong emphasis on ethics-based business practices and customer-centred approach soon became the defining features of our brand.

The 60’s was a time of expansion for the company. In this period, the government framed policies that laid emphasis on providing basic necessities of life, especially water, to all citizens of the country. The dry hinterland of western India was an important focus area and became VEMC’s market for Vertical Turbine Pumps. After this, VEMC group took a bold step and went beyond their comfort zone of the western region, and established the Rajendra Engineering Company in West Bengal, as the state distributor of Cooper Engines.

Radical changes in the style of doing business were seen in the decades between 1970 and 1990. The scope of work changed from supply of products to taking up turnkey projects, especially in the water pumping business. With its dynamic leadership at the helm, VEMC was up for the challenge and established Shailesh Engineering in Bangalore, a company that mostly handled turnkey projects for government’s water supply scheme and thermal power plants.

As the Indian economy opened up in 1991, new challenges came our way. Multinational companies began making in-roads into the Indian market giving VEMC and its partners a very stiff competition. However, the many years of trust and high-standards of service now bore fruit as the company remained unfazed in the wake of this altered situation. In fact, new avenues, such as building and construction began opening up to VEMC. In 1996, VEMC was awarded as the number one channel partner across India! In the period from 2003-08, the company grew at a rate of 20% CAGR, owing largely to its government projects.

Thus, after years of arduous efforts and strongly rooted business ethics, VEMC has been able to carve out a unique brand image for itself: one that emanates unfailing trust, relentless confidence and an inspiring vision for the future.

How Solar, Wind, and Hydropower can Outclass Coal Energy

For a very long time in modern human history, coal dominated the energy market as the cheapest, most easily available, and readily combustible source of energy. Coal energy was in fact the force behind the Industrial Revolution and continued to power factories, trains, and smelting furnaces, even into the twenty-first century.

However, today there is a huge concern to shift our energy demands from fossil fuels such as coal to renewable energy like solar, wind, and hydropower. This is due to the growing awareness about environmental issues and also the exhausting fossil reserves across the world. In the developed world, the transition is already evident, with shrinking demand for coal in the electricity sector. More and more power plants are switching over to solar and wind farms as the main source of energy to generate electricity. In the US, the Energy Information Administration (EIA) reported that the demand for coal in the electricity sector shrank from 28% in 2018 to 22% in 2019 (source).

As declining reserves of coal impact supply and leads to increased prices, renewable energy will be seen as a more cost-effective source of energy. This will draw the commercial sector further towards renewable energy as it will not just make them more compliant with their environmental legislation but also help them cut their energy bills and improve their margins.

India has set itself a target of producing 175 GW of renewable energy by 2022, out of which 100 GW will come from solar energy, 60 GW from wind, 10 GW from biomass, and 5 GW from hydropower (source). Increasing reliance on non-fossil energy is especially important for India to keep threats from climate change under check while its economy grows at a steady pace.

Critics take an interesting line of attack at renewable energy: The sun doesn’t always shine and the wind doesn’t always blow. This seems like a valid criticism but overlooks the stupendous growth of research and innovation in renewable energy (especially solar energy), backed by generous funding. This has greatly enhanced the storage systems so that the energy is used as and when needed. This has also placed renewable energy on the trajectory of increasing efficiency and declining equipment costs.

As fossils fade away into the background of the energy conundrum, renewable sources of energy like solar, wind, and hydropower will form the dominating portfolio for our energy needs of the future.

For more information on various types of solar services, feel free to contact us on +91 98199 07445. We would be happy to assist you in finding the best match, based on your requirements. As one of India’s best solar companies with 73 years of market experience, VEMC provides end-to-end Solar EPC services to its clients. VEMC is ISO 9001:2015 certified and a pioneer in the field of electromechanical engineering products, allied equipment, and services. Our sub-brand VEMCO Solar is one of the leading solar EPC companies — be it solar plant erection, procurement, commissioning, net metering, or electrical connections.

Types Of Solar Panels And The Best Fit For Your Commercial Needs

One of the foremost choices to make when it comes to procuring a solar system is with regards to the type of solar panel you wish to install. There are broadly three types of solar panels available and each differs from the other in terms of cost, efficiency and aesthetics.

Monocrystalline Panels

This type of panel gets its name from the fact that each cell in the panel has a single crystal of silicon which allows free movement of electrons through the cell, taking its efficiency upto 20% and more. High efficiency means lesser requirement for space and hence, these panels are best suited for residential use as space can be managed efficiently. Monocrystalline panels contain either 60 or 72 cells, depending on the size of the panel. The silicon cells are in the shape of black squares with their corners cut off, giving the panels a deep black aesthetic look.

Polycrystalline Panels

Multiple crystals go into making each cell in these panels which restrict the free flow of electrons through the cell. Their efficiency ranges between 15% and 17% but with increasing innovation in technology, this is expected to improve. Compared to Monocrystalline panels, these panels require more space and therefore, may be slightly challenging to accommodate in a residential setting. These panels also contain 60 or 72 cells but multiple crystals give them a marbled blue appearance, which may not be aesthetically pleasing. However, Polycrystalline panels are more affordable which, despite factors like space and efficiency, has enabled the product to make galloping strides even in the residential market segment in recent years.

Thin Film Solar Panels

These panels are solid black in colour and do not have any silicon cell outlines. Being lightweight and flexible, these are easy to carry and install. Thin-Film panels are the least energy-efficient (10-13% range) and are only suitable for large establishments like industries and utility solar projects with ample space. Being extremely cost-effective due to low energy efficiency and ease of installation makes these panels all the more suited for large-scale commercial establishments. These have a very short life expectancy and require frequent replacement. Depending on the material they’re made of, these panels can be both blue and black.


If you need some assistance to decide on the solar panel that suits your needs the best, feel free to contact us on +91 98199 07445. We would we happy to assist you in finding the best match based on your requirements. As one of India’s best solar companies, having 72 years of market experience, VEMC provides end-to-end Solar EPC services to its clients. VEMC is ISO 9001:2015 certified and a pioneer in the field of electromechanical engineering products, allied equipment, and services. Our sub-brand VEMCO Solar (Check out our solar story) is a market leader in solar system solutions — be it solar plant erection, procurement, commissioning, solar metering system, or electrical connections. At VEMCO Solar, our valued clients are provided with customised solar services solutions to fit all their needs.

6 Tips to Finding the Right Solar Installer Basis Your Requirement

Finding the right solar installer could be a challenging task as the market is flooded with installers claiming to have the required know-how. There are a number of aspects that must be considered while choosing the right professionals in the field. Here are 6 tips that will guide you in your quest for the right installer:

  1. Expertise: As the solar industry is rapidly expanding, there is growing demand for competent professionals with the right skills and expertise. In India, many solar installers go through formal training courses offered by reputed institutes like Indian Institute of Solar Energy and Gujarat Energy Research and Management Institute (GERMI). Certificates from these institutes are the best authentication for skills, knowledge, and expertise.
  2. Track record, experience, and references: Projects with previous clients could provide a good understanding of the level of experience an installer has. An installer must be thorough with the systems installed for other clients and be able to confidently discuss and demonstrate the projects. Speaking to their past clients could be a great way to find out how their installation was handled.
  3. Reputation in the market: Many online forums and sometimes, even the installers’ websites or social media pages can provide valuable insights into their clients’ experiences. A pattern of negative comments and customer complaints would indicate that you need to select another installer.
  4. Use of subcontractors: While installation by subcontractors is a common practice in the industry, there must be complete disclosure and transparency about their expertise, reputation, and track record. It will be important to fix responsibilities and confirm who stands behind the quality of the system.
  5. Warranty: What is the warranty being offered on the equipment? To give you a rough estimate, the average warranty offered on solar panels in around 20 years, and that on batteries and inverters is 5-10 years. Warranties shorter than this can indicate that the quality of the equipment is not up to the mark. 
  6. Competitive quotes: Finally, it is always recommended that you contact as many installers as possible and gather quotes, especially in a business-to-business scenario, where competing bids can help save expenses significantly. The contractors can prepare their bids only after visiting your facility to ascertain the various equipment, labour and logistics costs that will go into installing the system.

With the help of these tips, you can confidently stride towards the solar transformation of your facility.

If you need assistance on any solar engineering services, feel free to contact us on +91 98199 07445. We would be happy to assist you in finding the best match based on your requirements. As one of India’s best solar companies, with 72 years of market experience, VEMC provides end-to-end Solar EPC services to its clients. VEMC is ISO 9001:2015 certified and a pioneer in the field of electromechanical engineering products, allied equipment, and services. Our sub-brand VEMCO Solar (Check out our solar story) is a market leader in solar system solutions — be it solar plant erection, procurement, commissioning, solar metering system, or electrical connections. At VEMCO Solar, our valued clients are provided with customized solar services solutions to fit all their needs.

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!