One-way throttle valves, also known as check valves or non-return valves, are important components in hydraulic pumps. It allows hydraulic oil to flow in one direction while preventing it from flowing in the opposite direction. The structure and working principle of the one-way throttle valve can be briefly described as follows: structure: One-way throttle valves usually consist of the following components: 1. Valve Body: The main housing of the valve that contains the internal components and provides the connections required for fluid flow. Spool: This component controls the flow of hydraulic oil. It usually takes the form of a poppet, ball or flapper that rests on the valve seat to prevent flow in one direction. 3. Spring: The spring is used to provide the necessary force to keep the spool against the seat. The spring is designed to allow the valve to open at a specified differential pressure. Working Standards: The working principle of the one-way throttle valve can be summarized as follows: 1. Flow direction control: Valves are designed to allow fluid to flow in one specific direction while preventing it from flowing in the opposite direction. Flow direction is indicated by arrow markings on the valve body. 2. Forward flow (open position): When the fluid pressure on the inlet side of the valve exceeds the spring force, the spool is pushed away from the valve seat, creating an open channel for fluid flow. This allows hydraulic fluid to pass through the valve and continue to flow in the desired direction. 3. Reverse flow (closed position): When the fluid pressure on the outlet side of the valve exceeds the inlet pressure, the valve core is pressed against the valve seat by the spring. This effectively blocks reverse flow, preventing backflow of fluid through the valve. 4. Differential pressure: The one-way throttle valve operates according to the specified differential pressure. It is designed to open when the pressure on the inlet side exceeds the outlet pressure by a predetermined amount. This difference depends on the strength of the spring and the design parameters of the valve. 90R130-KA-5-NN-80-P-3-C8-H-03-GBA-29-29-24 90R130KA5NN80P3C8H03GBA292924 90-R-130-KA-5-NN-80-P-3-C8-H-03-GBA-17-17-24 90R130KA5NN80P3C8H03GBA171724 90R130-KA-5-NN-80-P-3-C8-H-03-GBA-17-17-24 90R130KA5NN80P3C8H03GBA171724 90-R-130-KA-5-NN-80-P-3-C8-H-00-GBA-42-42-24 90R130KA5NN80P3C8H00GBA424224 90R130-KA-5-NN-80-P-3-C8-H-00-GBA-42-42-24 90R130KA5NN80P3C8H00GBA424224 90-R-130-KA-5-NN-80-P-3-C8-F-03-GBA-38-38-24 90R130KA5NN80P3C8F03GBA383824 90R130-KA-5-NN-80-P-3-C8-F-03-GBA-38-38-24 90R130KA5NN80P3C8F03GBA383824 90-R-130-KA-5-NN-80-P-3-C8-F-03-GBA-35-35-24 90R130KA5NN80P3C8F03GBA353524 90R130-KA-5-NN-80-P-3-C8-F-03-GBA-35-35-24 90R130KA5NN80P3C8F03GBA353524 90-R-130-KA-5-NN-80-L-4-F1-H-04-GBA-42-42-24 90R130KA5NN80L4F1H04GBA424224 application: Check valves are commonly used in hydraulic systems for a variety of applications, including: -Prevents backflow in hydraulic circuits, ensuring fluid flow in one direction only. -Protect sensitive components from pressure fluctuations or reverse flow. - Controlling fluid flow in a specific direction, such as in hydraulic cylinders or actuators. - Regulate the pressure in the hydraulic system by combining a one-way throttle valve with a safety valve or a pressure control valve. 5. Cracking pressure: Cracking pressure is the minimum pressure required to open the valve and allow fluid to flow forward. It is the differential pressure at which the spool begins to move and clear the seat. The cracking pressure is determined by the spring force and the design characteristics of the valve. 6. Seat Design: The seat of a throttle check valve is usually machined or formed to provide a sealing surface against which the valve element rests when in the closed position. The design of the valve seat is very important to achieve an effective seal and prevent leakage in the closed position. 7. Fluid Compatibility: The compatibility of the valve material with the hydraulic fluid used in the system must be considered. Valves should be made of materials compatible with the properties of the fluid, including its temperature, pressure and chemical composition. 8. Pressure drop: When the valve is in the open position, there will be a pressure drop across the valve due to the resistance provided by the spool and flow path. Pressure drop affects overall system performance, so it is important to consider this when designing or selecting a check valve. 9. Size and flow: One-way throttle valves are available in various sizes and flows to suit different hydraulic system requirements. It is important to select a valve size that can handle the expected flow and pressure levels within the system. 10. Maintenance and inspection: The regular maintenance and inspection of the one-way throttle valve is very important to ensure its normal operation. This includes checking for any signs of wear, damage or contamination that could affect valve performance. Cleaning or replacing the valve, if necessary, will help maintain its effectiveness and prevent problems. 11. Installation direction: pay attention to the recommended installation direction of the one-way throttle valve. Improper installation, such as placing the valve upside down or at the wrong angle, can affect its function and cause problems such as leaks or improper flow control. 12. Combination with other valves: One-way throttle valves are often used in combination with other hydraulic valves to achieve specific control functions. For example, they can be used in conjunction with pressure control valves, flow control valves or directional control valves to create complex hydraulic circuits and control fluid flow and pressure in the system. 13. Flow control: The opening and closing characteristics of the one-way throttle valve can be controlled by adjusting the opening pressure or using different spring forces. This allows precise control of forward flow, enabling flow regulation or metering in hydraulic systems. 14. Types of one-way throttle valves: There are many types of one-way throttle valves, each of which has its own structure and working principle. Some common types include poppet valves, ball valves, flapper valves, and pilot-operated check valves. The specific type used depends on the application requirements and desired performance characteristics. 90R130-KA-5-NN-80-L-4-F1-H-04-GBA-42-42-24 90R130KA5NN80L4F1H04GBA424224 90-R-130-KA-5-NN-80-L-4-F1-H-04-GBA-38-14-24 90R130KA5NN80L4F1H04GBA381424 90R130-KA-5-NN-80-L-4-F1-H-04-GBA-38-14-24 90R130KA5NN80L4F1H04GBA381424 90-R-130-KA-5-NN-80-L-4-F1-H-03-GBA-14-35-24 90R130KA5NN80L4F1H03GBA143524 90R130-KA-5-NN-80-L-4-F1-H-03-GBA-14-35-24 90R130KA5NN80L4F1H03GBA143524 90-R-130-KA-5-NN-80-L-4-F1-H-00-GBA-14-14-24 90R130KA5NN80L4F1H00GBA141424 90R130-KA-5-NN-80-L-4-F1-H-00-GBA-14-14-24 90R130KA5NN80L4F1H00GBA141424 90-R-130-KA-5-NN-80-L-4-F1-H-00-GBA-14-14-20 90R130KA5NN80L4F1H00GBA141420 90R130-KA-5-NN-80-L-4-F1-H-00-GBA-14-14-20 90R130KA5NN80L4F1H00GBA141420 90-R-130-KA-5-NN-80-L-4-F1-F-03-GBA-20-20-20 90R130KA5NN80L4F1F03GBA202020 15. System Efficiency: The design and proper selection of the one-way throttle valve contributes to the overall system efficiency. By minimizing pressure loss and ensuring smooth and controlled flow in the desired direction, the valve helps optimize system performance and energy efficiency. 16. Control hydraulic shock: One-way throttle valve can be used to control hydraulic shock or water hammer in hydraulic system. The valve helps minimize the effects of hydraulic shock on system components by allowing fluid to flow in a controlled manner and preventing sudden pressure surges or reverse flow. 17. Noise reduction: The design and selection of the one-way throttle valve also contributes to the noise reduction of the hydraulic system. Noise from valve operation can be kept to a minimum by using materials with good damping properties and optimizing the valve geometry. 18. Environmental factors: When selecting a one-way throttle valve, it is important to consider environmental factors such as temperature, humidity, and exposure to pollutants. Some valves may require additional protection or special materials to withstand harsh environmental conditions. Keep in mind that the exact construction and principle of operation of a check valve may vary by design and manufacturer. It is important to refer to the technical documentation and specifications provided by the manufacturer for details on specific valve construction, principle of operation and operating parameters.