Today, one of our regular customers in Pakistan sent us a message that a large number of SS316 3PC Ball valves with threaded connections that he purchased from other Chinese valve vendor, were found to be of substandard quality by the end user, all of these valves are fail pass quality.
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The picture is the message sent by the customer to our sales representative.The end-user provided a test report that results show all the material was SS304, but the label was SS316. Our regular customer asked the Chinese supplier to provide a material report, but the sales refused to provide it, saying that the material was fine, and then refused to provide any certificates, test reports, production processes, etc.
fail pass quality ball valvesusually, customers only see the price on the quotation, which is just the price. The same material, parameters, and technical requirements of the target, but I am sorry to say that the Chinese valve market is now really mixed. There are a hundred ways to save costs in valve wall thickness, internal component design, stem material, valve plug/ball material, body material, etc.
For example, according to the valve wall thickness, many manufacturers use the lower limit value required by the valve standard, which means that the strength of the valve cannot be guaranteed according to the safety factor of the maximum pressure.
There is also the body material. Unless the material is tested, we can't tell with our naked eyes whether the valve meets the standard.
For threaded ball valves, the purchase volume is very large, and the general medium is water and steam, so users are not likely to really test whether the material of the valve meets the standard.
This time, the end user of our customer personally tested the material, indicating that the application conditions must be corrosive, so in order to ensure safe and reliable operation, a test was conducted.
Unfortunately, all valves in this batch did not pass. Such things are everywhere, which is also the main reason why our STONE 3PC ball valve has particularly lower sales performance, because very few customers really care about the material and wall thickness issues.
stone ball valve nptst+ 3pc ball valvescs13 10k 50 ball valveOur 3pc NPT ball valves are 30% heavy than others, and we pay special attention to the ratio of Cr, Ni, Mn, Mo for the material. We cannot compete with many cheating peers, and our costs are higher than their selling prices. We don't feel regretful or annoyed at all. A real brand will be known over time, which is why STONE has been around for more than 30 years and still exists.
I am just angry because some Chinese valve suppliers have caused a bad reputation for Chinese brands, which has not only harmed the interests of customers, but also the interests of the entire Chinese valve industry.
Today I say this not to show off how good we are, but to let more buyers, bosses, or engineers who purchase Chinese valves know that they should not only care about the price, but also pay more attention to quality control when purchasing. Cheap is a one-time business, and in fact it is very expensive, not only wasting your money, but also damaging your brand and reputation.
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.
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.
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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
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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.
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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.
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.
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