language English >

Home icon Product User Guide icon How Do Pilot-Operated Check Valves Work?

How Do Pilot-Operated Check Valves Work?

duhui 2023-05-29

How Do Pilot-Operated Check Valves Work?


Pilot-operated check valves are a type of valve used in hydraulic systems to control the flow of fluids. They work by using a combination of pressure and gravity to allow or prevent the flow of fluid through the system. The valve consists of two main parts: a pilot valve and a main valve.


The pilot valve is responsible for controlling the movement of the main valve. It does this by sensing changes in pressure within the system and adjusting its position accordingly. When pressure from upstream builds up, it opens up an inlet passage that allows fluid to flow through to downstream components. On the other hand, if there is no pressure or negative pressure present, then it closes off these passages.


The main valve operates based on what happens with the pilot valve.



How to troubleshoot common issues with your pilot operated check valve


Pilot operated check valves are a vital component in hydraulic systems. They allow fluid to flow in one direction while blocking it from flowing back in the opposite direction. Unfortunately, like any other mechanical device, pilot operated check valves may experience problems that can hinder their performance.


One of the most common issues with pilot operated check valves is internal leakage. This occurs when the valve fails to close completely and allows fluid to flow back through the system, causing inefficiencies and pressure drops. To troubleshoot this issue, inspect all components of the valve for signs of damage or wear that may impede its ability to seal correctly.


Another common issue is external leakage caused by damaged seals or fittings that allow fluid to escape from the system. In this case, conduct a visual inspection of all connections and replace faulty parts as necessary.


The science behind how a pilot operated check valve works


A pilot operated check valve (POCV) is an essential component in hydraulic systems. It is designed to allow fluid flow in one direction while preventing backflow in the opposite direction. The POCV operates using a pilot valve that controls the opening and closing of the main check valve. The science behind how a POCV works can be explained through its structure and function.


The POCV has two main components: the pilot valve and the main check valve. The pilot valve is a small, spring-loaded valve that regulates pressure on one side of the main check valve. When there is sufficient pressure on this side, the pilot valve opens, allowing fluid to pass through the main check valve. However, when pressure drops below a certain level, the spring forces the pilot valve closed, which closes off access to the main check valve and prevents backflow.


Benefits of upgrading to a more advanced pilot operated check valve


A pilot operated check valve is a type of valve that allows fluid flow in one direction and prevents it from flowing back in the opposite direction. It functions by using a pilot pressure to open or close the valve, allowing it to work even under high-pressure conditions. If you are currently using a standard check valve, upgrading to a more advanced pilot-operated one can offer several benefits.


Firstly, an upgraded pilot operated check valve ensures better control over fluid flow. It has the ability to maintain constant flow rates and prevent changes in pressure that could damage your equipment. Secondly, these valves have improved safety features compared to their standard counterparts. With its tight shut-off capabilities, this type of check valve reduces potential leaks and minimizes environmental hazards.


Thirdly, an advanced pilot-operated check valve offers increased reliability with longer operating life expectancy due to its sturdy design and quality materials used during manufacturing.


Expert advice on selecting the right size and type of pilot operated check valve for your application


Pilot operated check valves are used in a wide range of industries and applications. These valves are essential components that help prevent backflow, protect equipment from damage, and ensure smooth operation. However, selecting the right size and type of pilot operated check valve can be challenging, especially if you're not familiar with the various options available.


To choose the right pilot operated check valve for your application, it's important to consider several factors. Firstly, you need to determine the flow rate and pressure requirements of your system. This information will help you select a valve that can handle the demands of your particular application. Secondly, consider the type of fluid or gas that will pass through the valve as this could impact material selection. For example, corrosive or abrasive fluids require materials that provide resistance against these elements.


China Capped Valves manufacturer


VALTEC is a trusted name in the industry of China pilot operated check valves manufacturing. VALTEC's expertise and experience in designing and developing pilot operated check valves have made them one of the most sought after manufacturers in China.


The company has a team of expert engineers who are dedicated to delivering innovative solutions to their clients. They use state-of-the-art technology and advanced equipment to manufacture their products, ensuring that they meet the highest standards of quality and reliability. What sets VALTEC apart from other manufacturers is their commitment to providing personalized services to their customers, ensuring that they receive customized solutions that suit their unique needs.


VALTEC's range of pilot operated check valves includes various types such as single-pilot check valves, double-pilot check valves, hydraulic shock absorbers, and more.



VALTEC will rely on the comprehensive competitiveness of international technology research and development advantages, automation equipment advantages, enterprise management advantages and human resources advantages to continuously innovate industry technologies, promote industry progress, and achieve sustainable development.

Related news


zhejiang valtec plumbing equipment Co., Ltd.