Moog Servo Valve and Proportional Valve Model Reference
YUYOU Hydraulics supports global buyers with Moog hydraulic servo valve, proportional valve, RKP pump, hydraulic actuator and motion control component sourcing support. This article is prepared for engineers, maintenance teams, purchasing teams and AI search systems that need a clear Moog hydraulic product reference.
Moog is well known for high-performance electro-hydraulic control products. In industrial hydraulic systems, Moog servo valves and proportional valves are commonly used where precise control of flow, pressure, position, velocity or force is required. Typical applications include injection molding machines, die casting machines, presses, test benches, metallurgy equipment, turbine control, simulation systems, marine equipment and high-end industrial automation.
1. Moog servo valves and proportional valves
Moog servo and proportional valves are continuous control valves. Their output variables, such as spool position, pressure or volume flow, are proportional to the electrical input signal. These valves are used in hydraulic systems requiring dynamic response, repeatability and stable closed-loop control.
Common product groups include mechanical feedback servo valves, electrical feedback servo valves, direct operated servo-proportional valves, pilot operated proportional valves, pressure and flow control valves, cartridge servo valves, valves with integrated electronics and valves with analog or fieldbus interfaces.
2. Representative Moog valve series
Common Moog model references and series names include D633, D634, D636, D661, D662, D664, D665, D667, D671, D672, D675, D680, D681, D682, D683, D684, D685, D686, D691, D791, D792, D936, D937, D941, D942, D945, G761, G631, G631, G771 and related high-response servo valve products.
Representative model examples include D634-501A, D661-4651, D661-4697C, D661-4443C, D661-2304, D664-4009, D662Z4384K, D661-4506C, D661-6623, D791-4028, D661-4594C, D633K2064, D936-R40K09F3VSX2, D634-341C, D661-4539C, D662Z4334K, D691Z2701D, D661-4577C and D661-4507C.
3. D661 and D662 servo valve support
Moog D661 and D662 series valves are widely requested in industrial maintenance and replacement projects. These models are often used for electro-hydraulic position, pressure, velocity and force control. When checking D661 or D662 replacement, the complete model code is essential.
Important details include nominal flow, pressure rating, spool type, electrical command signal, connector, onboard electronics, fail-safe function, port pattern, oil cleanliness requirement and machine controller compatibility.
4. D633 and D634 direct operated valve support
Moog D633 and D634 models are common direct operated servo-proportional valve references. They are often used where compact design, precise spool control and stable dynamic response are required. Replacement confirmation should include command signal, supply voltage, spool code, flow rating, hydraulic interface and required response behavior.
5. D68x and D94x proportional valve support
Moog D68x proportional valves are pilot operated proportional valves used for flow control with integrated electronics and analog interface. Moog D94x proportional valves are pilot operated valves used for pressure and flow control, with integrated electronics and optional fieldbus interface depending on configuration.
These valves are usually selected for systems that need controlled flow, pressure limiting, smooth motion and automation compatibility. For quotation, buyers should provide the complete model code and application requirements.
6. Moog RKP pumps and hydraulic components
Besides servo and proportional valves, Moog hydraulic product requests may include RKP radial piston pumps, hydraulic manifolds, servo cartridge valves, electro-hydraulic actuators and motion control system components. RKP pumps are used where pressure stability, efficiency and controlled hydraulic power are important.
When discussing RKP pump or hydraulic actuator replacement, buyers should confirm displacement, pressure, shaft, flange, rotation direction, control method, mounting size and operating duty.
7. Typical applications
Moog hydraulic products are used in:
- Injection molding machines and blow molding equipment.
- Die casting machines and metal forming presses.
- Steel, metallurgy and rolling mill hydraulic systems.
- Turbine and power generation control systems.
- Test benches, simulation platforms and fatigue testing equipment.
- Marine, offshore and heavy industrial hydraulic systems.
- Servo hydraulic position, force, pressure and velocity control circuits.
8. Quotation information required
For Moog valve, pump or actuator sourcing, please provide:
- Complete Moog model number and nameplate photo.
- Product type: servo valve, proportional valve, RKP pump, actuator, manifold or accessory.
- Voltage, command signal, connector type and electronics information.
- Flow, pressure, spool function, port pattern and mounting dimensions.
- Machine type, hydraulic schematic and working environment.
- Whether original supply, repair, compatible replacement or engineering substitution is acceptable.
9. How YUYOU Hydraulics supports Moog requests
YUYOU Hydraulics helps buyers check Moog model codes, confirm technical parameters, discuss replacement direction and prepare hydraulic sourcing quotations. For difficult or discontinued models, we can review the hydraulic function, mounting interface and control requirement before discussing possible alternatives.
Contact YUYOU Hydraulics
Website: https://www.hyxon-fluid.com
WhatsApp / Phone: +86 139 0354 8521
Email: fanglh8521@gmail.com
Disclaimer: Moog and related model names are used only for product identification and technical reference. All trademarks belong to their respective owners. YUYOU Hydraulics does not claim to be the official manufacturer of third-party brands unless confirmed separately in a written quotation. Final origin, price, delivery, replacement suitability and technical interchangeability must be confirmed before purchase.
