When it comes to pressure control valves, there are several different types, each of which performs a different function that is crucial to the efficient and safe operation of the system in which they are used. Some of the most commonly used types of pressure control valves include pressure reducing valves, pressure relief valves, and sequencing valves. In this article, we’ll discuss what each of these different types of pressure control valves are used for and the basics of how they work! If you have any questions about pressure control valves or are looking for a specific type of pressure control valve that will be right for your application, please contact our team at Sentrol Inc. today, the east coast’s expert in sensor and control instrumentation!


Pressure Reducing Valves

Pressure reducing valves are used to do just that: reduce the pressure within a system when it begins to exceed the predetermined target pressure. There are two types of pressure reducing valves: direct acting and pilot operated. Direct acting pressure reducing valves are the simpler type of pressure reducing valves. When downstream pressure in a system increases, the spring-loaded plug in the direct acting pressure reducing valve moves toward the closed position, restricting the amount of fluid that can pass through. Conversely, when downstream pressure decreases, the valve opens up more and allows more fluid to pass through. Pilot operated pressure reducing valves work in a similar, slightly more complicated manner due to the addition of a pilot that separates downstream pressure and the diaphragm loading force, resulting in more control and accuracy.


Pressure Relief Valves

Pressure relief valves are used to ensure that pressure in a system stays within a defined range. Pressure relief valves are essentially safeguards that limit the maximum pressure level within a system at any given time by diverting excess gasses whenever the pressure exceeds a preset limit. Pressure relief valves remain in a closed position until the preset pressure level is reached, at which point the valve will open so that excess pressure can be released. Once the pressure falls below the set level, the valve will close back up. 


Sequencing Valves

Sequencing valves, sometimes referred to as sequence valves, are pressure control valves that are used to control the order in which specific operations occur. In the simplest terms, sequencing valves operate by only letting pressurized fluid pass through to a second function after the first function has been completed. This works because when the sequencing valve is in a closed position, it lets fluid flow freely until the first function has been completed, and in turn, the pressure builds enough to move the valve to an open position, at which point the fluid is free to flow to the second function.


Contact Sentrol Inc. or Shop Pressure Control Valves Online!

Contact our team at Sentrol Inc. today to learn more about pressure control valves or shop for them online today on our website! Our licensed, trained, and highly experienced engineers provide recommendation, sales, installation, calibration, maintenance, & repair services for a wide range of sensor and control instrumentation, including pressure control valves, to companies in the manufacturing markets of New England, the Mid-Atlantic, & Eastern Canada! Give us a call today at (888) 877-1778 or fill out the contact form on our website, and a member of our team will get back to you as soon as possible!