Product Introduction: The D661-5205 is a pilot-operated servo valve for analog signals, which belongs to the D661 series of Moog. It adopts a new type of ServoJet pilot stage, which improves the dynamic characteristics of the entire valve. The internal flow channel design of the large-flow valve greatly increases the rated flow of the valve. The spool position is electrically fed back by a displacement sensor, and the built-in electronic amplifier realizes closed-loop control of the spool displacement.
Technical Specifications: It complies with ISO 4401 size 05 and is a two-stage valve with a sturdy ServoJet pilot valve. The rated flow rate is 20 to 200 l/min (5.3 to 53 gpm) at 35 bar (500 psi) pressure drop per land. The maximum flow rate is 250 l/min (65 gpm) (when the second T-port is connected). The maximum operating pressure is 350 bar (5000 psi). The installation mode complies with ISO 4401 size 05. The 100% step response time is 6.5 to 14 ms at 210 bar (3000 psi). The supply voltage is 24 VDC (18 to 32 VDC), and the rated signal options include +/- 10 V, +/- 10 mA, 4 – 20 mA.
Functional Characteristics: It has high precision and responsiveness, can realize high-precision processing and measurement, and improve production efficiency and product quality. The fault insurance (Fail-Safe) function can ensure that the machine and equipment are in a safe position in case of unexpected power failure. It has low leakage, no pilot stage internal leakage, so the power consumption is low, especially suitable for multi-valve control systems. The permanent magnet linear force motor outputs twice the driving force of the electromagnet, and can maintain long-term and constant use. The dynamic response is high and has nothing to do with the system pressure.
Application Scenarios: Widely used in various industrial fields, such as 数控机床，aerospace, petroleum chemical industry and electric power. In the aerospace field, it is used in the hydraulic control system of aircraft to control the movement of flaps, landing gear and other components; in the petroleum chemical industry, it is applied to the control system of oil pumps and pipelines to ensure the stability and safety of the production process; in the power industry, it is used in the control system of steam turbines and generators to improve the operating efficiency and stability of equipment.
