Moog D684Z4826 Pilot-Operated Proportional Valve
- Product Introduction: It is a member of the Moog D68x series proportional valves, which are pilot-operated proportional valves integrating electronics and analog interfaces. The spool of this valve is directly installed in the valve housing and controlled by hydraulic pilot operation. It adopts Mini DDV as the pilot valve, which has excellent dynamic performance and high efficiency. The valve is designed for high-demand industrial applications, with high functional flexibility and excellent dynamic response, and can meet the precise control requirements of various complex hydraulic systems.
Detailed content
- Technical Specifications:
- Control Function: Flow control.
- Mounting Standard: ISO 4401 Size 08 (NG 25+).
- Hydraulic Parameters: The rated flow rate per land at a pressure difference of 5 bar (75 psi) is 550 l/min (145.3 gpm); the maximum flow rate can reach 1500 l/min (396.2 gpm); the maximum operating pressure of ports P, A, and B is 350 bar (5000 psi); the maximum pressure of port T with internal Y is 70 bar (1000 psi), and with external Y is 350 bar (5000 psi); the step response time for 0-100% step is 11-26 ms.
- Electrical Parameters: The supply voltage is 24 VDC (18-32 VDC); the rated signal options include ±10 V, ±10 mA, and 4-20 mA; the electrical connector is 6+PE or 11+PE.
- Functional Features:
- The valve body is optimally designed to achieve high rated flow.
- Equipped with a D633 pilot valve, it has low internal leakage and high energy efficiency.
- The required minimum pilot pressure range is small, which is convenient for system configuration.
- Integrated amplifiers and control electronics enhance functional flexibility.
- The pilot stage has a high natural frequency, enabling excellent dynamic response.
- Multiple fail-safe options are available to match different application requirements.
- A new pilot valve with integrated electronics and pilot valve position control can be optionally configured.
- Application Scenarios: It is widely used in various industrial fields, such as metallurgical equipment, where it controls the hydraulic system of rolling mills to ensure stable operation of rolling processes; in heavy machinery, it is used for the hydraulic control of large construction machinery such as excavators and cranes to improve operation accuracy and stability; in plastic machinery, it regulates the hydraulic system of injection molding machines to achieve precise control of injection speed and pressure; and in test systems, it is used for dynamic performance testing of hydraulic components and systems to provide reliable flow control.












