Structural design of linear pressure control valve: the cornerstone of accuracy and stability

Cage single-seat control valve: the best choice for reducing side loads
Cage single-seat regulating valve is a classic design among direct stroke pressure control valves. Its core feature is that the valve core is wrapped in a cage-type valve seat structure. This design not only enhances the pressure-bearing capacity of the valve, but also significantly reduces the lateral load on the valve core during operation. Side load is one of the important factors affecting the accuracy and stability of the valve. It may cause problems such as valve core deflection and loose sealing. Cage single-seat control valves effectively reduce these risks by optimizing the contact between the valve core and the valve seat, thereby ensuring the high accuracy and long-term stability of the valve.

Guide structure: reduces friction and improves performance
In addition to the cage single-seat design, the guide structure is also an integral part of the linear stroke pressure control valve. The guide structure usually includes components such as valve core guide sleeves and valve stem guide sleeves. Their main function is to guide the valve core and valve stem to move smoothly on the prescribed trajectory and reduce unnecessary friction and vibration. By using high-precision, low-friction coefficient materials and reasonable guide design, the resistance of the valve core during movement can be significantly reduced and the response speed and accuracy of the valve can be improved. At the same time, the guide structure can also effectively prevent the valve core from getting stuck or worn due to uneven stress, thereby extending the service life of the valve.

Flow-to-open type and flow-to-close type: flexible selection according to working conditions
In the design of direct stroke pressure control valves, flow-open and flow-close are two common fluid flow configurations. When the flow-to-open valve is opened, the fluid flows in from the bottom of the valve core and flows out from the top; while the flow-to-close valve does the opposite. Both designs have their own advantages and disadvantages, which have a direct impact on the stability of the valve. When the flow-open valve is opened, the force on the valve core is relatively uniform, which is beneficial to reducing vibration and noise. It is suitable for media with high pressure difference, high viscosity or easy crystallization. The flow-closing valve is more suitable for situations where quick closing is required or media backflow needs to be prevented. Therefore, when selecting a linear stroke pressure control valve, it is necessary to flexibly choose a flow-open or flow-close design based on specific working conditions and medium characteristics to ensure the best performance and stability of the valve.