Guidelines for selecting valves in water supply systems

Valves are designed to control a liquid or gas flow in any indoor or outdoor pipe system. However, there are different requirements for different systems, and therefore, valves come in various types and with numerous functionalities to suit any specific application.

So, how to choose the valve that will give you the best value based on the functionalities you are looking for?

It is crucial that you choose the right valve for your application, so there will be no need to replace it any time soon. And there are various aspects to keep in mind when making the decision – not just about functionality, but also about costs and the complete service life of the valve. Below are five steps guiding you to make the right choice for your next project, and you can download the guideline PDF for more details.

1. Key functionality

First of all, you need to consider the purpose of the valve. Should it prevent backflow, regulate flow or pressure or function as a shut-off valve? By specifying the exact performance requirements for the system in which the valve should be installed, you can compare these requirements with the principles and basic functionalities of the different valve types found in the guideline below, where you will find information about the most common valve types such as gate valves, butterfly valves, check valves, control valves and ball valves, as well as hydrants.

2. Materials and characteristics

The quality of wedge, stem and coating is the most important parameter when it comes to service life of the valve. Therefore, component materials as well as their resistance against e.g. corrosion, porosity and formation of biofilm should be considered. In the guideline, you will be introduced to the most commonly used materials in valve design and parameters to be aware of related to this.

3. Pressure loss

Especially in water systems, it is crucial that the valve causes either none or as low a pressure loss as possible. Pressure loss is basically loss of energy used to pump the water, so any loss across the system will mean that you will be using more energy. Learn more about working pressure, optimal temperatures, water hammer as well as workplace security in the guideline for selecting valves for water supply systems.

4. Total Cost of Ownership (TCO)

When considering the costs of a valve, it is important not only to focus on the purchase price but consider the total cost of ownership (TCO). TCO is the cost from purchase to disposal, and everything in between such as installation, operation and maintenance. Learn more about TCO in the guideline.

5. Size and specifications

Correct valve sizing is an important step in selecting the right valve for an application. Temperature, flow and pressure should be considered. Also, any requirement for specific actuation as well as local market requirements such as design standards, tests, approvals or certifications can also be important criteria for the valve selection process.

Need more details?

Download the complete guideline (PDF) below to make sure that you consider all relevant aspects when selecting valves for your next project.

Guidelines for selecting the right valves

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