Several problems, including the sale of remanufactured and poor-quality valves, plague the industrial valve industry. These issues put engineering safety at serious risk and may result in excessive downtime and accidents. 

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Therefore, industrial valve purchases must be well thought out to guarantee dependable and secure operations. This article lists six crucial variables to consider when buying valves for industrial applications.

The Use of the Valve Place and Purpose

Verifying a valve’s precise usage and environment before purchasing is essential. Valves can be used to regulate pressure, control flow, or isolate equipment, among other things. 

Understanding the valve's intended application aids in choosing the right type, size, and design to satisfy operational requirements successfully.

Valve General Requirements

It is crucial to consider the general criteria particular to the application while buying valves. This involves evaluating the valve's operating circumstances, including pressure and temperature ranges, the type of media being handled (liquids, gases, or slurries), and any unique environmental concerns. 

Understanding these elements ensures the selected valve can endure the circumstances and work at its best. The following are some general guidelines for valves that you should remember:

Valve Type

Choose the type of valve best for your application. Ball, gate, globe, butterfly, and check valves are common valve types. Each variety has unique qualities and is suitable for various uses.

Valve Size

Specify the suitable valve size based on your system’s flow rate and pipe dimensions. Valves come in various sizes, usually in inches or millimeters.

Pressure Rating

Consider the operating pressure in your system when choosing a valve, and select one with a pressure rating that is higher than or equal to the needed pressure. In most cases, pressure ratings are given in pounds per square inch (psi) or bars.

Temperature Range

Consider the range of temperatures across which the valve will function and select a valve that can withstand those conditions. Different substances and building techniques are appropriate for various temperature ranges.

Valve Material Compatibility

Check the valve's material to ensure it is compatible with the liquid or gas passing through it. Different substances, such as PVC, brass, bronze, or stainless steel, offer differing corrosion resistance and compatibility with various media.

Flow Characteristics

Consider your system's flow requirements when choosing a valve, such as whether you need one that can turn on and off or throttle and regulate flow. Specific flow control applications suit some valves better than others.

End Connections

Choose the appropriate end connections for your piping system. Fittings that are threaded, flanged, welded, or compressed are examples of common types. Verify that the valve's end connections meet the needs of your system.

Operation and Actuation

Consider if you need a manually operated valve or one that can be automated using actuators or control systems for operation and actuators. Applications requiring frequent operation, precision, or remote control are good candidates for actuated valves.

Compliance & Standards

Depending on your application's demands, ensure the valve complies with pertinent industry standards like ANSI, API, ISO, or particular certifications like NSF, UL, or ATEX.

Maintenance & Service

Consider the ease of maintenance, the accessibility of replacement parts, and the reputation of the supplier or manufacturer for technical assistance and post-purchase support.

6 Factors That Should Be Considered When Purchasing Valves

1. Valve Material Requirements

In industrial settings, various corrosive, erosive, and abrasive chemicals are exposed to valves. The material requirements for the valve shell and its internal components must be examined. 

The material selection should be appropriate for handling the media to avoid early wear, leakage, or failure. When choosing the valve, chemical compatibility, thermal resistance, and mechanical strength should be carefully considered.

2. Compliance with Safety Standards and Pipeline Regulations

In terms of industrial applications, safety comes first and foremost. Confirming that the valves being purchased adhere to the necessary safety requirements and pipeline laws is crucial. 

Following these guidelines ensures a safe and legal working environment by reducing the possibility of leaks, equipment breakdowns, and potential hazards.

3. Valve Performance and Packaging/Transportation Requirements

Based on the application’s needs, it is crucial to determine the performance criteria for valves, including sealing performance and leakage rates. 

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To safeguard the valves during shipping and handling, consideration should also be paid to the packing and transportation requirements. Protective coatings can be required to prevent corrosion if the valves are exposed to hostile environments.

4. Quality Testing of the Valve

It is crucial to confirm the quality of the valves through meticulous testing to guarantee their dependability and longevity. It also entails determining if the valves adhere to the necessary design specifications. 

Ball valves, for instance, must follow API6D, while butterfly valves must follow API609. Quality testing should cover various topics, including material integrity, dimensional accuracy, and functional performance, to ensure the valves satisfy the necessary criteria.

5. Valve performance requirements and packaging and transportation requirements

It's essential to consider the performance specifications of valves before buying them and to ensure they adhere to established industry standards. Sealing performance requirements and protective coating needs are two important things to consider.

Performance Requirements for Sealing: Valves must adhere to strict sealing regulations to ensure operating effectiveness and prevent leaks. To suit the unique requirements of your application, factors including sealing grade and sealing leakage should be carefully examined.

6. Quality testing of the valve

It is essential to conduct quality testing on valves to guarantee their dependability and efficiency. Valve makers frequently conduct extensive testing processes to ascertain whether the valves adhere to the design criteria. 

API6D for ball valves and API609 for butterfly valves are a few examples of design standards that are frequently utilized.

Final Words

Several things must be considered when buying valves for industrial applications to guarantee dependable and secure operations. Engineers and procurement experts can make well-informed selections and choose valves that best meet their unique application needs by carefully assessing the use, general requirements, material compatibility, safety regulations, performance criteria, and quality testing. 

Dombor: Your Trusted Valve Solution Supplier

Dombor is a reputable supplier that offers a one-stop purchasing solution for industrial valves. We ensure that customers can discover the ideal valves for their particular applications by offering various valves created to fulfill the needs of various industries. Dombor offers pre-sale consulting services to help customers choose the best valves for their needs while providing invaluable technical advice.

5 Considerations When Choosing Pneumatic Control Valves

When it comes to selecting the right type of pneumatic control valve for any application, you have many options at your disposal. Each comes with its own specific function, so it is helpful to understand differences and pick the type best-suited for your requirements.

To help you arrive at the valve “type” that’s right for your pneumatic application, this post will highlight five basic requirements to consider:

• Media
• Method of Valve Actuation
• Spring-Return Valve or Detented Actuation Valve?
• Pneumatic Valve Configuration
• Flow Capacity (Valve Size)

Media

The first and most obvious question is—what gas (or liquid) will be controlled by this pneumatic control valve, and at what input pressure? Compressed Air? Water? Negative Pressure? Gas? Before checking for any additional factors, ensure that the valve is compatible with the media and pressure passing through.

Method of Valve Actuation

There are a variety of methods available to open or close a pneumatic control valve. The four most common methods of valve actuation are:

• Solenoid operated (via electrical current)
• Manually operated (by skilled labor and via a lever, pushbutton, foot peddle, etc.)
• Mechanically operated (via tooling or work pieces in contact with a cam, ball or plunger)
• Remote air operated (from an output signal of another valve).

Spring-Return Valve or Detented Actuation Valve?

This is the return method the pneumatic valve will take “back” to its original, un-actuated state. Typically, this is either a mechanical spring, or a separate form of the same actuation method described above. Manufacturers call these methods “spring return” and “detented” valve types. Said another way, are you looking for a “momentary contact, momentary output” or “momentary contact, maintained output”? Decide whether you want your valve to return to its initial position or stay in its last position after actuation.

Pneumatic Control Valve Configuration

Most pneumatic control valves are 2-Way, 3-Way or 4-Way and, as a rule of thumb, it is a count of their active media ports:

• 2-Way Valves: Have one INLET and one OUTLET port and, upon actuation, allow media to pass through (known as a 2-way Normally Closed), or to stop flow (2-way Normally Open).
• 3-Way Valves: These add a third port to allow for venting (EXHAUST port) of pressure at the OUTLET port, when the INLET port is blocked. 3-Way valves are offered Normally Closed or Normally Open, as well.
• 4-Way Valves: These add a second OUTLET and corresponding second EXHAUST port to the 3-Way function, and are most commonly used for control of double acting pneumatic cylinders and actuators. Upon 4-Way Valve actuation, INLET pressure switches from one OUTLET port to the other.

Note: As an option, 4-Way valves can be configured with 3 positions, where the center position is forms a “neutral” position choice of three options (either all OUTLET ports exhausted, pressurized, or checked).

Flow Capacity (Valve Size)

Flow capacity is a fifth factor to address in pneumatic control valve selection. An undersized valve will slow down fill time or cause other forms of inefficiency in the system while an oversized valve can be classified as a form of waste in the system. It’s important to estimate a maximum flow capacity for your application and select the valve size with enough capacity. All valve suppliers provide a flow capacity, and have easy reference material to assist you, but essentially your valve will need to fill a specific downstream volume within your acceptable period of time.

Tip: Most manufacturers state a “Cv” value, which is a universally accepted flow capacity index, known as “flow coefficient”. It forms an easy way for you to compare similar sized valves.

Pneumatic Control Valves From Humphrey Products

Once you’ve used these five factors to identify the valve type you need, then weigh specific performance and integration attributes of matching brands and models available from valve manufacturers. Still a bit overwhelmed? Don’t worry! We’ve made it easy to browse our online catalog and narrow your results until you have found the exact products needed for your specific application. You can even search within results for the exact terms you’re looking for.

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