5 Must-Have Features in a Swing Check Valve With Lever And Weight

Understanding Swing Check Valves

Swing check valves, also known as backflow preventers, are important in many industries because they help fluid move in one direction while stopping it from going backwards. This helps things run smoothly and efficiently. valves feature a swinging disc on a hinge or shaft, determining their shut-off capabilities. The disc&#;s weight and the return flow dynamics significantly influence their performance.

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How do Swing Check Valve Works?

the flow to pass through. On the other hand, the valve closes when there is a drop in pressure on the inlet side and a build-up of pressure on the outlet side. The back pressure in the line holds the disc in the closed position.

 

Advantages of Swing Check Valve

Swing check valve advantages include several benefits that make them a popular choice for check valve uses in various applications. Let&#;s explore some of these benefits:

• Easy Maintenance:

  IPC&#;s swing check valves are designed for easy access to maintenance. You can easily remove the bonnet assembly, which includes the hinge and disc, by unscrewing a few bolts, making maintenance easier.

• Optimum Sealing:

  The unique disc design of IPC&#;s swing check valve ensures reliable sealing under pressure. The disc is optimally designed and requires just to right force to open and close the valve, enhancing its sealing ability.

• Versatile Installation:

  Swing check valve can be installed in both horizontal and vertical positions, offering flexibility in various piping systems.

• Preventing Water Hammer:

  Swing check valve with a lever and weight or a lever and spring are good for places where there&#;s a higher chance of water hammer. The weight on the lever can be adjusted to close gently against the seat and at the right speed, stopping the water hammer.

IPC Valves, a top valve company in India, makes and sells swing check valves. These valves are reliable and last a long time. Let&#;s explore the features and specifications of IPC swing check valve.

Manufacturing Excellence

As a leading Valve Manufacturer, IPC makes valves with top-notch manufacturing facilities. Our welding can seal and hard face weld well, and we also provide comprehensive technical information. We have good testing equipment, ensuring every valve we make is precise and meets nearly all international valve standards.

Secure Bolted Cover Design

IPC swing check valve features a secure bolted cover design for low and medium pressures and a pressure seal bonnet for high pressure Swing Check Valves, providing enhanced safety and leak-free operation.

Specifications

IPC swing check valves are available in a wide range of sizes and pressure ratings, catering to various industry requirements. Here are some key product selection and technical specifications:

• Pressure rating: ASME class 150 through
• Sizes: 1/2&#; to 1½&#; (DN-15 to DN-40) for lift check valves, 2&#; to 24&#; (DN-50 to DN-600) for swing check valves
• Manufacturing standards: API 594 / BS / API 6D / ASME B16.34
• Flange details: Standard as per ASME B16.5, with additional options according to BS, AWWA, EN, DIN, etc.
• End-to-end dimensions: As per ASME B16.10
• Testing standards: API 598 / BS EN -part 1 / API 6D
• Butt-weld end details: As per ASME B16.25

These details ensure that IPC swing check valves work well for many different jobs, offering reliable performance and dependable results.

IPC offers a range of swing check valves designed to meet various industry needs and specifications. Some common types of IPC swing check valves include:

Common Types of IPC Swing Check Valve

1. Standard Valve:

This traditional design features a swinging disc that opens and closes with the flow of fluid, allowing for efficient fluid movement while preventing backflow.

2. Pressure Seal Swing Check Valves:

Engineered for high-pressure applications, pressure seal swing check valves provide reliable sealing performance in critical environments.

3. Dual Plate Check Valve:

Also known as butterfly check valves, dual plate check valves consist of two semicircular discs mounted on a central hinge, offering reduced weight, size, and pressure drop compared to traditional swing check valves.

4. Silent Check Valve:

Designed to minimize noise and water hammer effects, silent check valves incorporate features such as spring-loaded discs or dashpots to ensure quiet operation.

5. Wafer Check Valve:

Wafer check valves are compact and lightweight, ideal for space-constrained installations. They feature a simple design with a swinging disc and are sandwiched between flanges for easy installation.

6. Lift Check Valve:

Lift check valves utilize a piston or ball to lift off the seat, allowing fluid flow in one direction while preventing backflow when the flow stops.

Additional reading:
What Are the Benefits of Industrial Valves?
Prevent Backflow: Why Tilting Disk Check Valves Are Essential
The Advantages of Choosing Cryogenic Check Valves for Purchase

The company is the world’s best Swing Check Valve With Lever And Weight supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.

Each type of IPC swing check valve offers unique features and benefits suited to specific application requirements, ensuring efficient fluid control and system performance.

Valves Application 

Swing check valves are integral to Wastewater Applications and various industrial applications, where the prevention of backflow is a critical concern. Let&#;s delve into some of the primary sectors where swing check valves are a staple:

• Water Treatment Plants In water treatment facilities, swing check valves are crucial for preserving the integrity of the water distribution network.
• Petrochemical Industry The petrochemical industry relies on swing check valve for maintaining the safety and efficiency of petrochemical processes.
• Oil and Gas Industry Swing check valve prevent the backflow of oil, gas, and other fluids in pipelines. These valves ensure the uninterrupted flow of resources, improving the efficiency and reliability of operations.
• HVAC Systems Swing check valves are commonly used in heating, ventilation and air conditioning (HVAC) systems. It helps to prevent the reverse flow of fluids.
• Power Generation

  In power generation facilities, it stops steam, water, or other fluids from flowing backward.

Conclusion

In numerous industries, the swing check valve is pivotal for ensuring fluids move efficiently and securely, preventing reverse flow. Their ease of maintenance and inherent safety contribute to their robust sealing capabilities, ensuring exceptional performance.

IPC manufactures top-notch swing check valves in compliance with industry rules & standards. Proper installation and routine maintenance, including visual inspection, are essential to maintain their efficacy over time. The global use of the swing check valve is testament to its versatility and reliability in a myriad of applications worldwide.

Tilting disc, slanted seat check valves

The slanted seat check valve also offers enhanced resistance to water hammer. The valve has a double eccentric shaft position as well as an increased seating angle. This yields a shorter valve stroke, thus reducing the time taken for the door to close.

Hydraulic dampers are recommended, especially when the valves are installed on a pumping station where high frequency opening and closing of the valve is required. The valve disc closes quickly over the first 85% of its angular travel before meeting the hydraulic damper. The damper then dissipates the kinetic energy of the disc and forces it to open slightly. The disc closes until it contacts the damper again and this cushions the disc until it returns to its fully closed position, sealing the valve. This function greatly reduces the onset of water hammer due to the damped and controlled method of valve closure. 

Hydraulic dampers are recommended, especially when the valves are installed on a pumping station where high frequency opening and closing of the valve is required. The valve disc closes quickly over the first 85% of its angular travel before meeting the hydraulic damper. The damper then dissipates the kinetic energy of the disc and forces it to open slightly. The disc closes until it contacts the damper again and this cushions the disc until it returns to its fully closed position, sealing the valve. This function greatly reduces the onset of water hammer due to the damped and controlled method of valve closure.

For more details, please see our slanted seat check valve product information.

Nozzle check valves

Nozzle check valves are designed with the valve disc connected to the stem which is guided on the central horizontal axis. A spring is positioned between the disc and the diffuser sleeve. When flow enters the valve, the hydraulic force exerted onto the front face reacts against the spring, causing the spring to compress and allow the valve to open. When the flow stops, the spring forces the disc to return to the closed position.

Due to the spring-assisted closure and the short linear valve stroke, the nozzle check valve is one of the quickest acting check valves available and is commonly used in pumped systems where water hammer is a potential concern. Because the disc is constantly in the direct line of flow, the head loss characteristics of this valve are higher compared to that of conventional swing check valves.

For more details, please see our nozzle check valve product information.

What to consider when choosing your check valves?

In order to choose the right check valve for your application, several selection criteria should be considered. First, however, there is not one type of check valves being the best choice for all applications, and the selection criteria may not be equally important for all cases. Some of the things you may need to consider are fluid compatibility, flow characteristics, head loss, non-slam characteristics and total cost of ownership.

Fluid

All check valves referred to in this article are designed for water and treated wastewater applications, but using the valves for raw wastewater/sewage applications may cause some issues. When selecting a valve for these fluids, you should consider how the presence of solids may potentially affect operation of the valve.

Flow characteristics

If a check valve closes very fast, it may prevent slamming against upstream equipment such as pumps. However, the rapid closure will not protect against the surges caused by pumps being started and shut down. If the valve opens (and closes) quickly, the flow will change rapidly and thus increase likeliness of surge occurrence.

Head loss

Head loss is, among other things, a function of fluid velocity. The head loss through a valve is determined by the internal design of the valve and the opening degree. When a valve is designed with a restricted (narrowed) opening compared to the pipeline, the velocity will increase through the valve, increasing the head loss as a result. Vice versa, if a valve is designed with less restriction and bore is equal size to the pipeline, the head loss will be smaller, and the valve will in practice not affect the overall head loss of the system. There are a number of values for head loss, amongst others zeta values, Kv and Kvs values.

Total cost of ownership

The costs for your check valve consist of more than just the purchase price. For some installations, the most important costs may be purchasing and installation, but in other cases, maintenance or energy costs may be equally or even more important. Also protecting more valuable equipment such as e.g. pumps has to be considered, and looking at the valve performance will be crucial. When considering costs as a selection criterion for your check valve, the total costs over the life of the valve should be considered. In general, the simpler the valve construction is, the lower are the maintenance requirements. The higher the Kv value, the lower the energy consumption. The higher the performance, the better the protection ability.

Non-slam characteristics

Check valve slam can affect pressure surges in a negative way. First step of the process is when the pump stops, starting the pressure surge. Second step is, when the flow is reversed, slamming against the fully closed check valve. If the check valve closes too fast, the kinetic energy is turned into high pressure, stressing the pipes, and causing high noise.

A slam sounds like if the disc or the ball from the check valve is hitting the seat and can make quite some noise. However, the sound is not caused by the physical closing but by a sound wave arising from a pressure spike stretching the pipe wall.

To prevent the occurrence of check valve slam, the valve should close in a controlled way and slower when near closed position. For a check valve to close slowly, it requires additional ancillary equipment, such as hydraulic dampers, which act as a cushion to the valve door, as it comes into its seated position. This slower closure allows the fluid to pass through the check valve until it closes, causing less kinetic energy turning into high pressure, and thus less energy to feed and maintain the surge. Consideration must be given to the upstream pump to ensure that it is suitable for reverse spin and flow.

As swing check valves have the disc in the flow stream, helping with rapid closure, they have better non-slam characteristics. However, today many pumps are frequency converted, enabling them to adjust the start-up and closure time to avoid water hammer.

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