Key Questions to Ask When Ordering High Pressure Flanged Ball Valves

Industrial ball valves control the flow and ensure your industrial processes&#; smooth operation and safety. They are highly durable, reliable, and easy to use. ̧

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However, industries face challenges when selecting the optimal ball valve for their specific application. Let&#;s look at the key questions you should ask before choosing ball valves.

Also Read: Key Factors to Consider When Selecting High-Pressure Valves

Seven Essential Questions to Ask Before You Buy Industrial Ball Valves

1. What type of media will flow through the ball valve?

The nature of the fluid type (liquid, gas, or semi-solid) passing through the pipeline greatly influences the industrial valve selection. Different media have varying ike corrosive, abrasive, and viscosity. This analysis will guide engineers in selecting ball valves of ideal material to be compatible with the media to prevent leaks, damages, or malfunction properties, such as corrosive, abrasive, and viscosity. This analysis will guide engineers in selecting ball valves of the ideal material to be compatible with the media to prevent leaks, damages, or malfunctions.

2. What is the right actuation method for the ball valve?

How you actuate (close and open) valves will influence their efficiency. Therefore, it is vital to understand the various types of ball valve actuation.

There are different types of ball valve actuation, such as:

• Pneumatic ball valve: These valves use compressed air to open and close the ball. They are ideal for applications where large opening and closing forces are required.
• Electric ball valve: Such valves use an electric motor to open and close the ball and are highly useful where precise control is required.
• Hydraulic ball valve: Here, a pressurized hydraulic fluid opens and closes the ball where large forces are required.
• Manual ball valve: These valves are operated by a handle and are often used in low-pressure systems.

In this regard, you have to consider these things:

• Frequency of operation
• Energy availability and complexity
• Actuation operations
• Control and reliability

For instance, pneumatic actuators are needed for frequent and fast operations, whereas electric actuators are ideal for a reliable power supply. Similarly, hydraulic ball valves are best suited for high-pressure applications where frequent operations are needed, and manual ones are the ideal bet for low-pressure applications that require occasional manual control.

3. What are the maximum and minimum temp & pressure ratings of the fluid passing through the pipeline?

Ball valves also have temperature and pressure ratings. The minimum and maximum values indicate the temperature and pressure range of the working fluid that valves can handle.

Why is adhering to these values important?

• High-temperature variation can cause non-uniform expansion and contraction, leading to cracks.
• Minimum and maximum values indicate the valve&#;s temperature and pressure range.
• Excessive fluid pressure can break the seal and cause premature wear, leaks, and safety hazards.

The number of times you open and close the valve in a year is known as its annual cycle rating. Ball valves are rated for a specific number of cycles. Using a valve over its annual cycle rating may hamper its durability. If you use ball valves to understand their cycle requirements, they can work for tens of thousands of operations without any performance issues.

5. How are you going to use the ball valve?

Different ball valves are available on the market depending on the nature of their operation.

• Shut-off vs. flow direction control:

Standard ball valves can completely restrict the fluid flow. However, specialized ball valves are also available if you need directional control.

• Multi-directional flow (3-way ball valves):

Three-way ball valves offer even more control by splitting the flow from a single source to two destinations.

6. How do you choose the right material for the ball valve?

The media flowing through the valve should be compatible with the materials of the valve&#;s body and internal components (ball, seat). Incompatible materials can corrode or weaken the seal, leading to safety hazards or malfunctions. Consider stronger options like Monel, Inconel, or alloys containing molybdenum, chromium, or nickel for highly corrosive fluids.

7. What certifications should the valve have?

It&#;s imperative to select ball valves with the right certifications relevant to the fluid type and application within your facility. Depending on your application, your ball valve and its actuator might require certifications from:

• ANSI (American National Standards Institute): verifies pressure and temperature ratings for pipe flanges for safe operations within desired limits
• NEMA (National Electrical Manufacturers Association): sets design standards for electric ball valves for reliable performance
• NSF International: offers guidelines for selecting ball valves in food, beverage, and pharmaceutical production facilities to safeguard public health

Also Read: How to Choose the Right Valve for your Industrial Requirement?

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Ball valves are versatile flow control devices suitable for extensive industrial applications. They are available in different sizes and designs, making them adaptable to diverse sanitary, petrochemical, and cryogenic applications.

These valves control the flow of fluids through a hollow, pivoting ball that is either a full or reduced port. The dimensions of full port valves are equal to the internal diameters of the adjacent pipelines. The dimension of a reduced port (standard port) valve diameter is one pipe size less than the internal size of the adjacent pipe. For example, a 1&#; reduced port valve will actually use a ball with a ¾&#; port diameter.

Ball valves have several advantages over other industrial valves, with the most notable being:

• They provide leak-tight seals.

• They can open and close quickly.

• They are more durable than most other industrial valves.

There are several ways to categorize valves. Each category or design determines the performance characteristics of the valve. The categories include:

• Valve design based on ball movement: Floating and trunnion mounted

• Port design: full port, standard, or V-port valve.

• Body style: single body, split, top-entry, 3-piece or welded body.

There are a few questions that industrial engineers must ask before choosing ball valves. Finding answers to these questions guides the experts through the challenging valve selection process and helps select reliable ball valves that satisfy the requirements of the piping system. What are these questions?

1. What type of media will flow through the ball valve?

The first question that the engineers must address is the type of fluid that passes through the pipeline. Is it a liquid, gas or semi-solid (slurry)? Understanding the physical and chemical characteristics of the fluid helps analyze its behavior as it flows past the valve. Understanding the nature of the service fluid is vital for making decisions about valve materials, port designs and valve sizes. For example, when choosing a gas ball valve we must take into account its performance and reliability issues when working with combustible gases, like hydrocarbons, liquified natural gas or chemical vapors.

2. Which actuation methods will you use?

Pipeline designers must specify the type of valve actuation that will complement flow control operations. There are piping systems that require frequent valve operation and high precision levels. Other flow operations require a one-off activation of the ball valve. When choosing ball valves, the designer needs to quantify the frequency of valve operations. They also need to evaluate the energy requirements and complexity of actuation technologies. The available actuation methods for ball valves include:

• Pneumatic actuation

• Electric actuation

• Manual operation

• Hydraulic actuation

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Evaluate additional actuation options like spring return or double-acting actuators as well. Understand the impact of add-ons like limit switches or pilot valves on the reliability of valves.

In processes that demand fast cycle times, pneumatic actuation for ball valves seems to be the most suitable choice. Engineers can install manually-operated ball valves in strategic pipe locations to facilitate pipeline isolation for maintenance or inspection. These low-cycle valves require operation a few times a year.

3. What are the temperature and pressure ratings of the pipeline?

Specifying the pressure and temperature conditions of the service fluid and the working environment is critical when selecting ball valves. The temperature ranges of the service fluid can alter the mechanical strength of the valve. If the temperature fluctuations are too high, the valve experiences non-uniform expansion and contraction that may lead to surface fractures with time.

Ball valves should sustain the pressure of the service fluid. Exceeding the designed pressure limits affects sealing quality and can cause premature wear. Select a ball valve with temperature and pressure ratings equal or higher to the ratings of the pipeline.

4. What are the estimated annual cycles?

The frequency of valve cycling affects the durability of a ball valve. Engineers should estimate annual operating cycles to determine the durability of different ball valves in the piping system. Other factors like maintenance and media abrasion affect the reliability of valves throughout their lifecycle.

The designers should estimate life expectancy of ball valves before choosing the actuation mechanism. If properly specified, ball valves can survive several tens of thousands of operations without failure. After understanding the cycling requirements, the engineers may settle on pneumatically actuated valves that guarantee better durability and reliability than electrically actuated counterparts.

5. How do you intend to use the ball valve?

While there are different types and brands of ball valves in the market, each has a definite application area. For instance, a steel ball valve for a chemical processing facility may not meet the specifications for use in a sanitary application. Ball valves provide shut-off for pipelines and can also provide directional control of fluids. When making selections for application-specific valves, the designer should understand whether:

• The valve exclusively shuts off the flow.

• The valve switches flow between sources.

• Splits flow from one source to two different destinations (applies to 3-way ball valves).

Industrial applications operate under different pressure and temperature conditions. There are strict emission and leakage control requirements attached to diverse classes of ball valves. When selecting the ball valve, ensure that it meets minimum system requirements and regulatory specifications.

7. Which materials are used to manufacture the valve?

The type of valve materials comes down to the properties of the service fluid. When evaluating valve materials, engineers should verify:

• Compatibility with the service media

• Resistance to corrosion

• Cost

The most common materials for ball valve bodies are brass, stainless steel, plastic, Monel, Inconel, Molybdenum, Chromium alloys, nickel alloys or copper. Severe service ball valves require materials with better strength and corrosion resistance values like Monel or Inconel.

When examining valve materials, the designers should pay attention to the composition of seal materials. Soft-seated ball valves may use rubber seals or PTFE seals. For extreme fluid service, the ball valves feature metal-to-metal seats.

Which testing and quality assurance procedures does your valve vendor use?

When working with vendors or manufacturers, the company should request information about testing protocols and quality assurance measures that they use. Testing procedures analyze the performances of different ball valves, leak and emission tests and pressure tests to ensure valves are safe for specific applications.

Do not purchase ball valves because they are the cheapest in the market. Take an extra step to evaluate the quality assurance criteria and standardization marks on the valve body or packaging. There is no point in purchasing ball valves in bulk, only for them to fail after a few working cycles.

8. What certifications should the valve have?

The application of ball valves spans different industries. In each sector, appointed organizations certify products to verify compliance with health and safety regulations. Depending on the type of application, ball valves and their actuators are subject to the following certifications:

• ANSI certifications: Determines the pressure and temperature ratings for pipe flanges.

• NEMA certifications: Sets the standards for the design of electrically actuated ball valves.

• NSF certifications: Provide guidelines for selecting ball valves in food, beverage and drug production facilities.

Ball valves should have certifications relevant to the fluid applications you are running within the facility.

9. What are the maintenance requirements for ball valves?

Ball valves do not typically require a high volume of maintenance interventions. They have simple flow control mechanisms and are less likely to fail. However, that does not preempt the fact that industrial valves, at times, will require maintenance. When selecting valves, establish a plan for inspection and maintenance. Maintain a lean inventory of repair and replacement parts like seals for valves and consumables for actuators. Manual ball valves may require fewer maintenance interventions than actuated valves.

Conclusion

Selecting ball valves for different industrial applications is not a simple process. It requires a careful review of the technical specifications of the pipeline, a balanced selection of manufacturing materials, and research on the different valve industry codes and standards. By answering the above questions, engineers and pipeline designers can make informed decisions and select reliable ball valves that provide long-term service.

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