Product Introduction: It belongs to the D680 series of Moog servo proportional valves, which is an electro-hydraulic driven servo valve made of cast steel and produced in the United States. The D680 series valves are throttle-type flow control valves available in two-way, three-way, four-way, and five-way configurations, mainly used in systems that require high dynamic response. The integrated circuit board of this valve adopts SMD technology and uses a 24V DC power supply, which has the advantages of energy saving and reliable operation.
Technical Specifications: The working pressure range of ports P, A, and B is ≤350 bar; the pressure of the pilot stage is at least 10 bar higher than the pressure of port T or Y; the ambient temperature range is -20℃ to +60℃ (-4℉ to +140℉); the oil temperature range is -20℃ to +80℃ (-4℉ to +170℉); the recommended viscosity of the working medium is 15 to 45 mm²/s, and the allowable viscosity is 15 to 400 mm²/s; sealing ring materials can be NBR, Viton, etc. according to user requirements; the working medium is petroleum-based hydraulic oil (DIN 51524 Parts 1 to 3) and ISO 11158, which can be selected according to user requirements.
Functional Features: Direct-acting pilot valves do not require pilot stage leakage flow, which can save a lot of energy, especially for systems with multiple valves; the dynamic performance of direct-drive valves is not affected by changes in working pressure; the pilot valve has excellent pressure gain, and the spool and valve sleeve design provides high spool driving force for the long-stroke main spool, which can enhance the position control of the main spool even under strong fluid power and in media containing impurities; based on high natural frequency, it has excellent dynamic performance, can achieve high position loop gain of the main spool, and ensure excellent static and dynamic response of the main valve; small pilot oil flow can also drive the main spool to move quickly; the fail-safe Type A two-position four-way solenoid valve is used to control the pilot flow short circuit, which can make the spool in a limited safe position.
Application Scenarios: It is widely used in the industrial field, such as the flow control of hydraulic systems in machinery manufacturing, the precision control of industrial automation equipment, and the servo control links in heavy industrial equipment. It can also be applied to electro-hydraulic position, speed, pressure, or force control systems, such as the control system of injection molding machines, the servo mechanism of metallurgical equipment, etc.
