Check Valve Function, Installation, Materials, & Applications
August 30, 2023

Check Valve: Function, Installation, Materials, & Applications

Check valves are used as one-way or non-return valves in practically all industrial applications. Check valves are easy instruments that serve a crucial duty by preventing reversal flows, preventing harm, and guaranteeing effective operations. Different check valve designs are created for particular applications. Here are some of the most popular varieties of check valves and some of their suggested uses to assist you in selecting the best one for your needs.

What is a check valve?

A check valve is a mechanical component that only permits one direction of fluid flow. The valve blocks the path for fluid to flow as the direction of flow changes. They are also referred to as one-way valves or non-return valves. It is typically used in fluid pipelines to stop fluid backflow.

The check valves typically have two ports, one for the entrance and one for the outlet. Figure 1 depicts a standard check valve. An engineer by the name of Frank P. Cotter created the first check valve in history in 1907. Following this, Nikola Tesla created a revolutionary check valve with no moving parts, as seen in figure 2. The Tesla valve is another name for this valve.

Function of the Check Valve

The pressure differential between the outlet and intake ports is a major factor in the check valve’s operation. The valve opens the route for fluid to flow when the pressure on the inlet side is high. When the flow is reversed and the pressure at the outlet port exceeds the pressure at the intake port, the valve closes and the flow is stopped. These valves can be operated without the use of an actuation mechanism, a person, etc.

The majority of the time, check valves are positioned in areas of an operation where fluid backflow could harm the system and render it useless. In the case of reverse osmosis, the fluid needs to transit the system only in one direction; thus, to achieve this, the check valve is inserted in the flow line. Similarly, the pipelines of sewage systems feature check valves to ensure that waste can only exit the system and not re-enter it.

Installation of the Check Valve

Three things are necessary to understand the valve selection and installation: valve orientation, sealing pressure, and cracking pressure. The cracking pressure is the lowest pressure at the inlet port needed to even minimally open the route. The resealing pressure is the lowest pressure at the valve’s outlet port that completely closes the valve to stop fluid from flowing backward. The valve should be installed in accordance with the flow direction, which is why it is advised to double-check the valve’s operational direction before installation.

Materials of Check Valve

Using these materials to manufacture this check valve

The majority of check valves are constructed of sturdy materials to handle high-pressure situations. Check valves are frequently made of the following materials:

Polyvinyl chloride (PVC) is flexible and resistant to corrosion. PVC’s smooth surface makes it easy for the pieces of the check valve to move around.

Chlorinated Polyvinyl Chloride (CPVC): PVC and CPVC are similar in quality; however, CPVC can withstand applications that require high temperatures.

Bronze: Bronze is corrosion-resistant, can be cast in intricate configurations, and can be used for low- and medium-pressure applications.

Brass: Brass is less expensive than bronze and shares the same properties, including machinability.

Cast Iron: Due to their superior corrosion resistance, cast iron check valves are utilized for hot and cold water, HVAC, steam, gas, and utility services.

Ductile Iron: Due to its higher than 3% carbon content, ductile iron is easily bent and molded. It is more easily formed into check valves and stronger than cast iron.

Iron: Applications involving steam, water, oil, and gas use iron. It can withstand a variety of pressures and temperatures. Its superior performance more than offsets its hefty price.

Stainless Steel: Stainless steel is rust-proof, strong, and suitable for use in demanding environments, including chemical applications.

Polypropylene (PP): Check valves are made of polypropylene (PP), which has a remarkable corrosion resistance that surpasses that of CPVC and PVC.

PVDF (Polyvinylidene Difluoride) is a material that is used in applications that require a high degree of purity and resistance to acids, solvents, and hydrocarbons.

Cast Steel: Due to its resilience to sudden impact without deforming, breaking, or bending, cast steel is used to make check valves. Additionally, it is simple to form into any style of check valve.

The following variables affect the choice of valve type and material:

  1. The material’s suitable for the fluid in action.
  2. dimensions of the pipeline and the available space.
  3. requirement for sealing and cracking pressure.
  4. Either a horizontal or vertical installation is possible.
  5. the size and contours of the envelope.
  6. accessibility for maintenance, repair, and inspection.
  7. operating conditions and the temperature of the fluid in motion.

Application of the check valve

Check valves have been used in a wide range of applications. As an example, they are frequently installed on a pump’s outlet side to prevent backflow. Check valves are crucial for maintaining water pressure in the pipes since centrifugal pumps, the most prevalent kind of water pumps, are not self-priming. Additionally, HVAC (heating, ventilation, and air conditioning) systems frequently employ check valves. A coolant is pushed up many stories in huge buildings using HVAC systems, for instance. These check valves are set up to prevent coolant from flushing back down.

Check valves are most frequently employed in:

  • Power Industries
  • Mining
  • Food and Beverage Companies
  • Process
  • Oil and Gas Plants
  • Pharmaceutical Industries
  • Steam heat recovery
  • service at high temperatures
  • thermal service
  • High-pressure safety service
  • System safety for utilities
  • Cut off the cooling.
  • production and refinement of petroleum
  • processing of hydrocarbons

The following applications are possible, depending on how well the check valves function:

  1. To stop the system from being harmed by fluid backflow.
  2. To guarantee the avoidance of contamination brought on by fluid backflow.
  3. To prevent a pipeline from being siphoned.
  4. To keep the vacuum seal in place.

Conclusion

steam heat recovery. Using check valves, you can regulate the flow of gases or liquids. Check valves are economical tools that stop waste and safeguard machinery. The graphic below shows how check valves fluctuate based on flow rate, media gravity and temperature, line size, pressure, and flow velocity. The body, seat, disc, and cover are the four separate components of a standard check valve. Check valves come in many variations to suit a wide range of applications. Mcneil Instruments Inc. is one of the most popular check valve manufacturers, stockists, suppliers, and exporters in India and worldwide.

Read More
adminBest Valve Suppliers, Industrial, Industrial Valves, Industrial Valves manufacturers, Instrumentation Valve, valve exporters, Valve Manufacturers, Valve Suppliers, Valve Suppliers India
Valves Types and Application - Mcneil Instruments Inc.
May 26, 2023

What are valves, and how do they function?

Valves are essentially tools that control, regulate, or direct flow within a system or process. They frequently have a variety of features that serve to specify their best use.

By opening, closing, or partially obstructing different passages, a valve regulates, directs, or controls the flow of a fluid (gases, liquids, fluidized solids, or scurries). Despite the fact that valves are technically fittings, they are frequently discussed separately.

Mcneil Instruments inc. is one of the best Industrial Valve Fittings Manufacturers, Suppliers, and Exporters in India.

Valves serve a variety of purposes, such as:          

  1. based on the status of the valve, starting or stopping the flow
  2. controlling the pressure and flow within a piping system
  3. regulating the flow direction inside a pipe system
  4. enhancing security by reducing pressure or vacuum in a pipe system

Explained valve opening methods

Even while various valves work towards the same objectives, their mechanical strategies can differ.

A valve’s total performance is affected by how it opens and closes, as well as by how much control you have over the flow and how rapidly the valve can work.

The majority of valves fall into one of three groups:

  • Manual Valves: These valves use handwheels, hand levels, gear wheels, or chains to activate and are typically regulated by hand.
  • Actuated Valves: These valves provide remote control and automation for high-precision or large-scale applications and are frequently connected to electric motors, air or pneumatic systems, hydraulic systems, or solenoids.
  • Automatic Valves: Some valves open when a particular flow requirement is satisfied. Examples include pressure release valves opening when an overpressure condition is recognised or check valves closing during backflow.

Typical functional names and their typical design categories include:

  • Isolation Valves: ball, butterfly, diaphragm, gate, pinch, piston, and plug
  • Safety Relief Valves: Vacuum and pressure relief valves
  • Non-Return Valves: lift and swing check valves
  • Special Purpose Valves: Valves with many ports, floats, feet, knife gates and line blinds

The key to an accurate fit and reliable operation is the valve end connections.

After sizing and design, it’s crucial to think about valve end connections.

The most obvious takeaway from this is that you should select an end connection that works with your plumbing, but there are functional aspects of common end types that could make one valve better suited to your needs than another.

Below are typical valve connections and ends:

  1. Threaded or Screwed: utilised frequently in instrument connections or sample points
  2. Flanged: the most typical ends for use with piping
  3. Butt Welded: utilised frequently in high-pressure or high-temperature activities
  4. Socket Welded: used frequently on tiny bore pipework where threaded connections are not allowed
  5. Wafer and Lug: used frequently for small valves put in systems with little room

Conclusions

In this overview Mcneil instruments Inc. is one of the Best Valves Instrumentation Manufacturers and Stockiest in India. Making the appropriate valve selection for your project may seem difficult. However, you may quickly narrow down your selections to find the ideal valves for your needs by starting with generic criteria, such as valve design, valve size, and valve actuation mechanism.

Read More
adminBest Valve Suppliers, Industrial, Industrial Valves, Industrial Valves manufacturers, Instrumentation Valve, valve exporters, Valve Manufacturers, Valve Suppliers, Valve Suppliers India
December 1, 2022

Importance of metal seated 2-way ball valve

Mcneil Instruments Inc. are the Ball Valve Manufacturers in India!

The 2-way ball valve is one of the most widely used valves on the market. It features two ports, an exit, a bore-filled ball, and four more openings. Since the ball is spun 90 degrees by a manual hand lever, they are also known as quarter-turn ball valves or shut-off valves.

A metal ball with a hole through it is sandwiched between two seats to create a ball valve, which controls the flow. Ball valves may be used to throttle gases and vapours, and they are especially useful in low-flow situations. They are applied in several hydrocarbon processing scenarios.

In applications involving the management of fluids or gases, valves are used to start or stop the flow, control or throttle the flow, prevent backflow,

 A ball valve is a type of quarter-turn valve that controls flow through it using a hollow, perforated ball that pivots. When the ball’s hole is parallel to the flow, the valve is open; when the valve handle pivots the ball 90 degrees, the valve is closed. A ball valve is a shutoff type valve that is used to manage fluid (liquid or gas) flow. In order to regulate the flow, the valve essentially has a ball inside of it. The ball is coupled to an external lever that opens or shuts the valve’s path for fluid to travel through. Typically, gate valves are utilized in place of ball valves for diameters greater than 100MM.

Mcneil Instruments Inc. are the Ball valve manufacturers that provide premium quality classified materials in accordance with institutionalized mechanical parameters and quality standards for their excellence in water-driven actuators that are connected to the valves for controlling the progression of liquid, gas, and widely exporting, supplying to the customers of oil-refining, pharma, chemical, and other industries.

Read More
adminIndustrial Valves manufacturers
October 10, 2022

Things to consider before choosing a valve

A valve is a kind of fitting that enables fluid flow via a pipe to be regulated, controlled, and directed. Valves are frequently employed in systems to control water pressure, stop backflow, direct flow, and shut off access to water. Be it homes or industries, they are found everywhere. Thus due to its wide application, you must choose the right kind of valves from the best valve suppliers in India. To select the right domestic and industrial valves, be sure to read this article till the end.

4 Things to consider before choosing a valve –

  1. Dimensions

The flow capacity of a valve is determined by its size, which must match the system’s needed flow rate. To assess a valve’s applicability, consider its flow coefficient which describes the connection between the pressure drop over the valve and the related flow rate.

  1. Media type and various factors affecting it

Determine whether your media is self-lubricating like oils or dry like gas and air. This will help you select the right material for your valve. PFA and PTA are used when dealing with abrasive compounds. Whereas, while monitoring high-pressure gases, it is advisable to use metal valves.

Also, consider the pressure while choosing the valve that will work best for your application. Speciality valves are usual for high-pressure applications, and these valves often have thick wall diameters to withstand the pressure.

Additionally, you must also consider the temperature of the media. The key factors that must be taken into account while choosing the valves based on temperature are the material used and its seal against the temperature.

  1. The function of the valve

To what demand does your valve need to respond? While 3-way valves are useful for on/off control, media diverting, and mixing, 2-way valves work well for on/off control in a system. Additionally, keep track of how frequently your valve will be opened or closed.

Purchase a valve from the best valve suppliers in India, to ensure that it is ordinarily oriented in a direction and switches to the other direction when activated. This will increase the lifespan of the valves.

  1. Maintenance

Last but not the least, maintenance is the most important consideration when selecting a valve. Since valves may degrade over time, you must consider maintenance costs when selecting a valve. Both application stability and valve durability rely on this. Working with a damaged valve is extremely risky because it could result in gas or liquid leaks.

To ensure that your valves last for a long time with low maintenance make sure to purchase valves from the best valve suppliers in Mumbai.

Conclusion

Given the number of options available in the market. It can be overwhelming to choose the right kind of valve. However, don’t worry. If you are looking for premium quality valve suppliers in India, then Mcneil instruments are your one stop solution. They have 37 years of experience creating and developing products. Thus you no longer need to worry about the quality of your product. So what are you waiting for? Do check out the official website of Mcneil instruments to avail more information.

Read More
admin0 commentBest Valve Suppliers, Industrial Valves manufacturers, Instrumentation Valve, Valve Manufacturers, Valve Suppliers, Valve Suppliers India
October 6, 2022

Use and Advantage of Different Types of Valves

Valves used in plumbing and other related works are manufactured in various parts of India. Such Valves Manufacturers in India make many different types of valves. In this article, we discuss the different types of valves made by Industrial Valves manufacturers and their advantages and disadvantages.

  1. Gated valves

A gate valve is made by many Valves Manufacturers in Mumbai. These types of valves move a gate vertically and are used to open or close the pipeline completely. There are no small openings possible. The entire gate is either closed or opened. If you are looking for a regulated flow, a gate valve wouldn’t be an ideal choice.

  • Advantage: They have very less fluid resistance. The force required to open/ close is comparatively small.
  • Disadvantage: Large space is required for installations. The two sealing faces make processing, grinding, and maintenance tough. The time taken to open/ close is also more.
  1. Butterfly valve

If you need a valve that can open and close often, a butterfly valve would be a good choice. Purchase them from the Best Valves Manufacturers in Mumbai to enjoy good quality and performance.

  • Advantage: They have a simple structure and weigh less. The time taken to open and close is small. They resist fluid in minute amounts. They can be used for different media surfaces and are widely made by Instrumentation Valves Manufacturers in Mumbai.
  • Disadvantage: The range of adjustments available for flow is narrow. It cannot be used in high temperatures or pressure conditions in a piping system. Sealing quality is inferior in comparison, hence not preferred much.
  1. Globe valve

A globe valve is highly recommended in cases where regulation of flow is needed. The opening and closing create friction which is less than other valves made by Instrumentation Valves Manufacturers in India. So, the chances of wear and tear are much less in this case.

  • Advantage: Maintenance and repair of the valve are quite simple, as it has only one sealing surface. The valve is resistant to higher temperatures.
  • Disadvantage: The change in flow direction is subject to change and causes more resistance to flow. The opening of the valve is slow in comparison.
  1. Ball valve

A ball valve is an advanced form of plug valve with a ball-shaped opening and closing device. We rotate the ball to 90 degrees whenever it needs to be closed or opened. Industrial Valves manufacturers in Mumbai make these useful valves.

  • Advantage: A ball valve is reliable when dealing with corrosive media and can achieve full sealing even when temperature and pressure are high. The sealing surface is not easily eroded.
  • Disadvantage: Industrial Valves manufacturers in India use Teflon to make ball valves. These have poor thermal conductivity. We cannot adjust it much either.

Final Overview McNeil is one of the Best Valves Manufacturers in India with several years of experience in the field. They provide good quality valves for industrial use in all types and materials. The number of satisfied customers is testimony enough of their product quality.

Read More
admin0 commentIndustrial Valves, Industrial Valves manufacturers, Instrumentation Valve, Valve Manufacturers
We Export To :
Kazakhstan, Algiers, Johannesburg, Ghana, Uganda, Iraq, Subra al-Haymah, Australia, Yaounda, South Africa, Saudi Arabia, Ethiopa, Kuwait, Luanda, Abu Dhabi, Peru, Sudan, Colombia, Nairobi, Turkey, Russia, Khartoum, Kano, UAE, Bahrain, Cape Town, Trinidad and Tobago, Dar es Salaam, Nigeria, Antananarivo, Tripoli, Addis Ababa, London, Douala, Lebanon, Tunisia, Ouagadougou, Mogadishu, Harare, Mbuji-Mayi, Qatar, Zaria, Soweto, Omdurman, Angola, Alexandria, Dubai, Yemen, Casablanca, Africa, Oman, Giza, UK, Houston, Accra, Algeria, Argentina, Cairo, Chine, Kolwezi, Hong Kong, Abidjan, Vietnam, Port Elizabeth, Maputo, Canada, Port Harcourt, Singapore, Egypt, Venezuela, Freetown, Ibadan, Iran, Malaysia, Mexico, Cameroon, New York, Indonesia.