MOOG servo valve D792-5002 adopts a three-stage control mode. Firstly, the control amplifier integrated into the servo valve receives an externally set electrical command signal, and then drives the current in the pilot valve coil according to the signal, causing the pilot valve to generate a pressure difference. This pressure difference creates a pressure difference at the control port, causing the pilot fluid to flow and resulting in displacement of the main valve.
MOOG servo valve D792-5002It is one of the D792 series three-stage servo valves developed by MOOG company. This series of valves is a pilot servo valve with an integrated control amplifier, featuring high dynamic performance and high precision. Here is a detailed introduction:
working principleThe D792-5002 servo valve adopts a three-stage control mode. Firstly, the control amplifier integrated into the servo valve receives an externally set electrical command signal, and then drives the current in the pilot valve coil according to the signal, causing the pilot valve to generate a pressure difference. This pressure difference creates a pressure difference at the control port, causing the pilot fluid to flow and resulting in displacement of the main valve. At the same time, the position sensor (LVDT linear variable differential transformer) measures the position of the main valve and feeds back the position signal to the control amplifier. The control amplifier compares the feedback signal with the set signal and adjusts the pilot valve until the error between the two is minimized, ensuring that the position of the main valve is proportional to the electrical signal, thereby achieving precise flow control.
structural characteristicsThis servo valve is a three-stage servo valve with a spool valve sleeve. The valve body structure is four-way, and the pilot stage is two-stage. D761 and D765 series pilot valves can be selected. Its installation type complies with ISO standards, but the X and Y ports do not comply with ISO 10372-06-05-0-92.
Technical Specifications：
hydraulic parametersWhen the rated flow rate is ∆ p 35bar (500psi), the flow rate per throttling edge is 400-1000l/min (105.6-264.1gpm), and the maximum flow rate can reach 1100l/min (290.6gpm). In terms of maximum working pressure, ports P, A, and B are 350 bar (5000 psi), port T with Y inside is 210 bar (3000 psi), and port T with Y outside is 350 bar (5000 psi).
Electrical parametersThe power supply voltage is 24V DC (18-32V DC), the rated signal options are ± 10V and ± 10mA, and the electrical connector is 6+PE.
Performance characteristics：
high-precision controlElectronic position feedback is achieved through pressure isolation position sensors (LVDTs), which have no loss and can achieve high-precision flow control. Its resolution is less than 0.2%, hysteresis is less than 0.5%, zero drift is less than 2% at ∆ T=55K, the maximum zero position leakage is 10l/min, and the maximum pilot stage leakage is 11l/min under 100% step signal input.
High dynamic responseWhen the response time is 0-100% of the spool displacement, it depends on the pilot valve and is generally 3-10ms. It can quickly respond to changes in the input signal, meeting the high requirements for dynamic performance in application scenarios.
integrated designIntegrated SMD electronic circuit with error polarity protection, optional fifth and sixth ports in the valve body for external pilot valve pressure supply and return port connection, convenient for installation and use.
MOOG servo valve D792-5002application fieldDue to its high dynamic response, high control accuracy, and long service life, D792-5002 servo valve is widely used in electro-hydraulic servo control systems in aviation, aerospace, shipbuilding, metallurgy, chemical and other fields. For example, in some devices that require precise flow control and fast response, it can demonstrate its outstanding performance.
