How to choose valve material

What are valves?

This article will help you provide a good understanding of How to choose valve material. Different types of valves include gate, globe, butterfly, plug, check, diaphragm, control, pinch valves etc. each type of valve has model numbers with different functional capabilities and features. Some of the valves are self-operated or they are operated with hydraulic, pneumatic or actuator. Engineers must know flow media, flow velocity and the intended purpose when selecting valves that are used in high pressure circuits.

How to choose valve material

Proper design needs lots of thought. It is especially when it comes to specifying the components. These components make these types of valve systems. Valves selection is very critical and it is a key aspect of that selection process. It is the understanding of how the materials used in the valve are considered. It has a long range impact on valves and its overall system performance.

1.   Establishing the parameters

When engineers select the valves used in a high pressure circuit it requires functions of those valves that match the choices. Flow media, velocity, pressure and the specific kind of valves are the key parameters. It will help to direct the engineers towards the right material to the valves. Beyond all these parameters the engineers today are also turning their attention to the valve materials.

2.   Materials that play nicely

Understanding the materials’ incompatibilities are crucial. These are for those parts of the valves that come into direct contact with the media flow.

3.   Valve type and size

Choosing the right valve type and every valve needs to perform more than one or more functions such as: Shut flow, mix flow, divert flow, pressure relief, and adjust flow and backflow prevention

4.   Construction materials

Knowing the comp ability of chemical requirements. The valve materials are needed to be compatible with liquids or gasses that are flowing through it. Plastic valves resist with the corrosive and harsh chemicals that are better than metal valves. Common materials that are used for valve making includes ductile iron, bronze and brass, Monel, Inconel and stainless steel.

5.   Performance

Determining the temperature and pressure requirements. One should find both pressure and temperature ranges when the valve is installed. Metal valves are the best as they have a higher temperature and plastics. These are also best for pressurized gasses and hence they are stronger.

6.   Maintenance

Make sure to consider the maintenance. Valve choices should include and give attention to maintenance requirements. This is very important for both application stability and valve reliability.

Challenge in choosing valve material

The challenge in making the material choice is very important because the chosen material fits the application. Very important thing to be concerned about the working condition is to know that the temperature and pressure ratings for the working media is to check erosion and corrosion properties. Engineers that are assigned to choose valve material should be always familiar with the ASME B16.34 standard requirements. ASME codes are accepted worldwide.


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