Hydraulic Valves and Directional Control Valves

In this category, you will find various types of hydraulic valves and directional control valves. These components are responsible for starting and stopping the hydraulic fluid flow and changing the direction of flow. The product names indicate the number of ports and functions each valve has. For example, the simplest directional control valve is the 2/2 type, which in one position disconnects the pressure line from the work point, while in the opposite position, it establishes the connection between the two.

Using high-quality components is essential for ensuring the reliable performance of directional control valves.

Contact us if you need advice when choosing the right product!

Classification of Hydraulic Valves and Directional Control Valves

Hydraulic directional control valves can be categorized into three main groups based on their operation and design: spool valves, rotary spool valves, and poppet valves.

Spool Valves

These components feature a movable spool fitted into a housing bore. The housing, typically made of steel or cast iron, is machined with ring channels into which the spool moves to connect or disconnect fluid paths. The spool generally moves linearly.

The sealing characteristics between the spool and the bore are determined by the gap and overlap. The seal is also influenced by factors such as temperature, fluid viscosity, and pressure.

With spool-controlled directional valves, it’s important to consider leakage loss, which can lead to significant performance degradation or even cause the hydraulic system to fail.

One common malfunction is that the hydraulic motor may rotate even when the valve is in the closed position. Fortunately, leak-free spool valves are available in the market, offering a solution to this issue. Among the different types of directional control valves, spool valves are the most popular and widely used due to their easy handling, versatile design, and low operating losses.

Rotary Spool Valves

While worth mentioning for completeness, rotary spool valves are rarely used nowadays. They are not suitable for use in modern high-pressure systems.

Poppet Valves

In poppet valves, the movement of the valve disk opens or closes the flow of fluid. A key advantage is that as the pressure in the sealed area increases, the closing force strengthens, preventing leakage.

This makes poppet valves ideal for high-pressure applications. Another benefit is the reduced risk of sticking, and they can handle pressures up to 1000 bar, whereas spool valves are generally limited to 300-400 bar.

Quick and Easy Purchasing

Our website offers sorting and filtering options to help you find the perfect hydraulic valves and directional control valves. Use the vertical menu on the left to specify the manufacturer and product features you are interested in.

If you still find the selection process too time-consuming, you can use the dropdown menu on the right to sort the products based on your preferences, bringing the most relevant options to the top of the list. Once you've found the product you need, you can add it to your cart with a single click.

If you can't find what you're looking for on our online platform or have additional questions, feel free to visit us in-store or contact us through any of our communication channels.