Purchasing Valves: The Essential Technical Factors
Valves are an essential component in a variety of mechanical systems and processes, helping regulate and control the flow of fluids and other substances. Therefore, when it comes time to purchase a valve, it is extremely important to bear in mind the various technical factors that need to be considered in order to ensure you are buying the right valve with the right characteristics for your particular application. In this article, we shall outline the eight essential technical factors purchasers must consider when purchasing valves.
1. Regulation
When purchasing a valve, it is essential to first consider the purpose for which you intend to use the valve. In doing so, you must consider the type of regulation and control that you need the valve to provide – whether it is a full-flow on/off valve, a throttle valve for reducing flow, a manual shut-off valve, a pressure relief valve, a check valve to maintain pressure, etc.
2. Operating Conditions
It is also necessary to consider the environment in which the valve is intended to operate, as this will determine the type of valve that is most suitable for your application. You must assess factors such as temperature, pressure, corrosion, flow rate and other physical and chemical factors that affect the valve. Depending on the circumstances, you will need to select a valve appropriate for the specific service conditions, selecting materials that are suitable for the particular application.
3. Valve Size
You must also consider the required valve size, as this will have an impact on the type of valve and the overall performance characteristics. The appropriate sizing of the valve is determined by the flow rate and pressure drop required in the system, with larger valves generally offering improved flow regulation while smaller valves can offer better throttling performance.
4. Connection Type
The type of connection used to attach the valve is also important, as it will determine the degree to which the valve can be efficiently integrated into the system. Generally speaking, butt-welded valves offer the best overall performance, offering a superior restriction to pressure or flow, while flanged valves may be easier to install and offer a lower cost alternative.
5. Valve Type
Depending on the purpose and environment in which it will operate, there are many different types of valves available, each of which has its own unique characteristics and performance limitations. Common types of valves include globe valves, butterfly valves, gate valves, ball valves and needle valves. It is essential to select the valve type most suitable for the application and operating environment.
6. Materials of Construction
The type of material that the valve is constructed from is also a very important consideration. Valves are typically constructed from materials such as cast iron, brass, carbon steel, stainless steel, Monel and other alloys. Depending on the operating environment, the chosen material should be strong, corrosion-resistant and capable of withstanding the pressure and temperature ranges required in the system.
7. Service Life
The service life of the valve must also be taken into consideration. It is important to select a valve that is capable of withstanding the pressures, temperatures, corrosive conditions, and other factors pertinent to the application, so that it will be able to serve its purpose over the long-term.
8. Cost
Finally, the cost of the valve must also be taken into consideration. While it is important to buy the right valve with the right characteristics, it is also important to choose one that fits within your budget. Cost factors such as the size and material of construction will have a significant impact on the overall cost of the valve, so it is essential to weigh these factors against the required performance of the valve.
In conclusion, when purchasing a valve, there are a number of essential technical factors that purchasers must consider. These include the regulation type, the operating conditions, the valve size, the connection type, the valve type, the materials of construction, the service life, and the cost. By keeping these factors in mind and selecting the appropriate valve for the job, purchasers will be able to ensure that the valve purchased is suitable for the particular application and operating environment.
