When shopping for a valve selection, it can seem complex to try and select the right valve for your application. However, once you know what to look for, it's fairly straightforward. In this article, we'll take an in-depth look at valve selection. Our valve selection guide will cover everything from valve function to valve type and more.
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Valves can serve many different purposes- control of flow, regulating pressure, on/off, temperature regulation, and many more. Each function requires different valves and configurations. So, before deciding on a type of valve, consider what you want the valve to do. Let's take a look at a few examples:
There are many different standard and industrial valves, so shopping the valve selection through a desired valve function is an ideal way to find the right choice.
What is the process medium you are putting through your valve? For instance, if a valve is on -320F liquid nitrogen, it requires different seats, seals, and bonnets than a valve that is on a 70F potable water line.
This is an essential part of selecting the right valve since an incorrect material choice can quickly lead to valve failure. Some of the valve materials you may encounter include stainless steel, plastics and epoxies, brass, and cast iron. Each material has different advantages and disadvantages, so check carefully which one would work best for your intended medium.
This may sound quite elementary, but many people think that the valve that they need should be line size. Sometimes, purchasing a valve that equals line size makes a lot of sense, but other times, you can specify a smaller (less expensive) valve that will do the exact same thing as a valve that equals line size.
In addition to valve function, media, and size, you also need to consider various flow characteristics. Some questions you may wish to ask include the following:
Another thing you'll want to consider is how frequently you'll be using the valve. Industrial valves are often better suited to frequent use than standard household options. Additionally, certain types of valves work better for regular use than others.
The globe valve, for instance, lends itself well to regular and frequent use.
As you might expect, the price of a valve is based on more than just the valve function. If you buy an actuated control valve, it will be significantly more expensive than one that's manually operated. Additionally, certain materials are more inexpensive than others. For instance, a plastic valve is often cheaper than a stainless steel one but generally offers superior corrosion resistance.
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So, before you decide on a valve, it's best to define what you can afford to spend. If you have a relatively tight budget, it may be better to go for the second-best option and then replace it when you have more funds available for the purpose.
Depending on how delicate a particular valve is and how many working parts it has, some valves may require more regular maintenance than others. It's an important consideration when making a valve selection. If you don't have a lot of time to dedicate to maintenance, it may be well worth choosing a valve that has lower maintenance needs.
However, you also need to consider that certain media will require more maintenance by necessity. For instance, if you're working on a pipeline that transports crude oil, it will likely require regular maintenance. The same is true of pipes transporting wastewater into treatment plants.
In these cases, you likely want to look for valves with minimal areas where impurities can gather. This will allow you to keep the valves clean without having to do daily maintenance.
Do you need an automated or pneumatic valve? What type of actuation- pneumatic or electric? Double acting, fail open, fail close? If pneumatic, how much air do you have available for actuation- 60 or 80 psi? Would you like a solenoid or limit switch? All of these questions (and more) are questions you should consider while specifying and purchasing your valves.
Features:
Leflow is offering Straight and Angle type globe valve, Size DN15 to DN300,PN16,The Sealing is commonly Stainless steel, Flow direction is from bottom to up. The stem is usually 2Cr13,because of its rigidity. Fusion bonded epoxy is common coating.
Cast iron globe valves are commonly used in industrial piping equipment to control and regulate the flow of fluids. It is mainly composed of body, bonnet,disc,Stem and other accessories.By rotating the stem, the disc will contact or separate to seat, so as to control or regulate flow of fluid.
Cast iron globe valves are suitable for liquid or gas piping systems under medium and low pressure. It can handle a variety of media, such as water, oil, steam and so on.
Its key benefits are as following:
1. Simple and compact structure: Cast iron globe valve is composed of a small number of parts, easy to install and maintain.
2. Good sealing performance: different materials are used for the seat and valve disc, and suitable sealing materials can be selected according to the requirements of the medium to ensure excellent sealing performance.
3. Good flow performance: the channel design of the valve seat is reasonable, and the flow resistance is small, so that the flow of the fluid is not hindered.
4. Strong corrosion resistance: the surface of the cast iron globe valve body is treated with corrosion protection, which can effectively prevent the corrosion of the medium.
5. Fast opening and closing: the opening and closing speed of the valve is fast, which can quickly cut off or restore the flow of fluid.
6. Strong bearing capacity: Cast iron globe valve is made of cast iron material, strong pressure resistance and high bearing capacity.
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