How do you choose a valve type?

How do you choose a valve type?

Selecting your Valve

1. Choose a valve type depending on your application.
2. Consider your fluid type (liquid or gas) and its characteristics to determine compatible valve materials.
3. Determine the temperature, pressure, and flow rate under which your valve will be operating.

What are valve types?

Isolation Valves: Ball, butterfly, diaphragm, gate, pinch, piston, and plug valves. Regulation Valves: Ball, butterfly, diaphragm, globe, needle, pinch, and plug valves. Safety Relief Valves: Pressure release and vacuum relief valves. Non-Return Valves: Swing check and lift check valves.

What are the three valve classifications?

All of the most common types of automated valves fall into one of three main categories. They are linear, rotary, and self-actuated. There are a variety of valve types within each of these categories each having its own benefits. This training course is focused on rotary and linear actuated valves.

How do you select valve characteristics?

Valve characteristics selection guidelines

1. Type of fluid to be controlled.
2. Temperature range of fluid.
3. Viscosity range of fluid.
4. Specific gravity range of fluid.
5. Minimum and maximum flow required.
6. Minimum and maximum inlet pressure at the control valve.
7. Minimum and maximum outlet pressure at the control valve.

How do you determine valve size?

So, how do you size a control valve anyway? When sizing a control valve, the rule of thumb is to size it so that it operates somewhere between 20-80% open at maximum required flow rate and whenever possible, not much less than 20% open at the minimum required flow rate.

How do I choose a ball valve?

6 Steps to Select the Right Ball Valve for Your Industry

1. Pick the Appropriate Valve Size. This is one of the most important steps when picking the right ball valves for your needs.
2. Choose the Right Material.
3. Performance Expectations.
4. Maintenance.
5. Certifications.
6. Expected Working Temperatures and Pressure.
7. Winding Up.

How do you identify a valve?

The tag itself should identify the valve, usually by showing the valve number. The type of valve and the system the valve is part of typically are identified. For example, the valve tag might read “200# Main Steam Shut Off.” This identifies the valve as the shutoff valve in the 200-pound main steam line.

What is the other name for the plug valve?

Explanation: Plug valve is also called as slim valve and is used for on/ off control but with little pressure drop. Needle valve is used for accurate flow.

What are valve characteristics?

The inherent characteristic of a valve is obtained when there is a constant pressure drop across the valve for all valve positions; the process fluid is not flashing, cavitating or approaching sonic velocity (choked flow); and the actuator is linear (valve stem travel is proportional to the controller output).

What are the different valve characteristics?

A few other inherent valve characteristics are sometimes used, such as parabolic, modified linear or hyperbolic, but the most common types in manufacture are fast opening, linear, and equal percentage. Each application will have a unique installation characteristic that relates fluid flow to heat demand.

How to choose the right valve for your system?

Valves control gas and liquid flow in almost every process and system. As common as they are, choosing the right valve can sometimes be time consuming and confusing. Begin valve selection by first gathering some basic information on system performance requirements. Knowing this will make it easier to find the right valve.

What are the specifications for a blind valve?

Key specifications include valve type, actuator type, port connections, valve size, as well as the material of the valve body, its seat, seal, and lining. Blind valves are common on ships and offshore platforms.

When to use equal percentage of valve characteristics?

The following guidelines can be useful in determining if the control valve installed, is suitable for the application. Equal percentage characteristics should be used for applications with a small range of flow setpoint, large delta pressure at the valve, and increasing loads.

What are the characteristics of a control valve?

Type of fluid to be controlled. Temperature range of fluid. Viscosity range of fluid. Specific gravity range of fluid. Minimum and maximum flow required. Minimum and maximum inlet pressure at the control valve. Minimum and maximum outlet pressure at the control valve.