Rotary Valve Basics

4.6
Rotary Valve Basics

A rotary valve is a type of gate valve that rotates to control the flow of gas or liquid. The most basic version of a rotary valve is the common stopcock. Howev

A rotary valve is a type of gate valve that rotates to control the flow of gas or liquid. The most basic version of a rotary valve is the common stopcock. However, there are many more types and sizes. Here's a look at a few of the most common types. You can learn more about their application and maintenance in this article. Hopefully, this will help you select the perfect rotary valve for your needs.

Components

A rotary valve has three primary components: the rotor, the bearing, and the housing. The valve body, also known as the rotor shaft, has a planar upper surface 168 that is raised by an optical sensor assembly 200. These three components work together to regulate the flow of materials, maintain a differential gas pressure, and seal materials inside the valve housing. The rotor shaft is mounted on a drive mechanism, or motor, from the outside. This mechanism controls the rotation speed and direction of the rotor.

Application

The elliptical seal is a key feature of the rotary valve. Its radial tilt regulates the volume of fluid passing through the valve. The annular metal seal 136 is captively retained in the depression 138 of the assembled seal cartridge structure 18 a. When unclamped, the disk periphery 24 forcibly engages the seal portion 136 a, causing it to deform into an elliptical shape.

Sizing

Rotary valve sizing is important when selecting the best valve for your particular application. Though rotary valves look similar, their applications vary widely. If you're unsure of which valve to select for your specific application, the Smoot Sizing App can help. In addition, using the app's extensive database of available valves, you can easily contact app developers for advice. For more information about rotary valve sizing, download the app and get started today.

Maintenance

To maintain a rotary valve, check the linkages that connect the levers and rotors. These should be well-lubricated to keep the mechanisms quiet and prevent any damage. If the valve stops rotating, check for signs of a foreign object jam or buildup inside the valve. If you can't determine the cause, consult a valve maintenance manual to diagnose and repair the problem. A thorough inspection of rotary valves will guarantee optimal performance.

Repair

If your rotary valve is noisy, it could mean a few things. Either your rotors are getting too large, or you have a foreign object jamming the valve. If you're not sure what caused the noise, there are some simple steps you can take to fix the problem yourself. First, read the valve's maintenance manual. Oftentimes, noise is an indication of a malfunctioning valve.