Pilot Operated Sequence Valve
The Pilot Operated Sequence Valve is a specialized hydraulic valve that plays a pivotal role in controlling the sequence of operations in a hydraulic system. It ensures that certain hydraulic functions occur in a specific order, enabling precise and efficient performance. This valve operates by using the pressure of an external pilot source to control the opening and closing of the valve's main spool.
• Precise Sequence Control: This valve ensures that hydraulic functions occur in a precise order, preventing any undesired actions or potential damage to the system.
• Increased Efficiency: By regulating the sequence of operations, the Pilot Operated Sequence Valve optimizes the overall efficiency of the hydraulic system, leading to improved performance and productivity.
• Provides an ordered sequence of operations, such as in clamp and boost circuits
• Can be used as a safety valve with high or varying back pressure in the return line.
• Can be used as a compensator in a pressure compensated flow regulator circuit
• Versatile Applications: With its ability to control the order of operations, this pressure sequence valve finds applications in a wide range of industries, including manufacturing, construction, agriculture, and more.
The Pilot Operated Sequence Valve functions based on a simple yet effective principle. It allows the hydraulic fluid to flow from its inlet port to the outlet port only when a predetermined pilot pressure is achieved. This pressure is typically generated by a separate pilot pump or obtained from another part of the hydraulic system. Once the pilot pressure reaches the required level, the valve opens, permitting the flow of hydraulic fluid and initiating the subsequent operation in the sequence.
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• Machine Tools: These pressure sequence valves are widely used in machine tools to control the order of operations during machining processes, ensuring accuracy and reliability.
• Hydraulic Presses: Pilot Operated Sequence Valves play a crucial role in hydraulic presses, regulating the sequence of operations for tasks such as clamping, pressing, and releasing.
• Automated Production Lines: In automated production lines, these pressure sequence valves enable smooth and synchronized movement of hydraulic actuators, ensuring efficient production processes.
• Material Handling Equipment: Pilot Operated Sequence Valves are utilized in material handling equipment, such as forklifts and cranes, to control the lifting, lowering, and tilting functions.
(1) Control the sequential actions of multiple components;
(2) Used in the pressure-holding circuit;
(3) It is used as a balance valve to prevent the cylinder piston from falling freely due to its own weight;
(4) Use the external control sequence valve as the unloading valve to unload the pump;
(5) Use the internal control sequence valve as the back pressure valve.
How do pilot operated valves work?
Pilot operated check valves work by allowing free flow from the inlet port through the outlet port. Supplying pilot pressure to the pilot port allows reverse flow. Air pressure at the top of the poppet assembly opens the seal, allowing air to flow freely.
What are the two types of sequence valves?
There are two different ways of classifying sequence valves. The first type is divided into direct acting type and pilot type according to its mechanism and structure. The second type of pressure control mode: internal control or external control.
How do sequence valves control pressure?
By using sequence valves, two or more actuators in a hydraulic circuit can be automatically sequenced. When the fluid flow is directed to the actuator portion of the circuit, the main actuator will move. The sequence valve will block flow to the auxiliary actuator until a predetermined pressure is reached, after which it will allow fluid flow to the actuator. The sequence valve is equipped with a check valve, which will allow fluid to flow freely around the valve when the direction of the actuator is reversed. A sequence valve is used when one pump powers both circuits and one circuit takes precedence over the other. Sequence valves are used in hydraulic circuits.
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