German Made Moog Servo Valve with Up to 500 L/min Flow Rate Horizontal Pump Shaft Position and Flange or Foot Mount

D663-5002, D663-5304K, D663Z4305K, D663Z4307K, D663Z4322K, D664-4009, D664-4013, D664-4311K, D664-4383K, D664-4384K

American MOOG German made pressure flow control servo valve for industrial applications.

• MOOG-6226 ZUD662UNDD661
• MOOG-6227 D633Z313B
• MOOG-6228 D941-6733C-0001
• MOOG-6229 D661-4922 P80H0BD5NSD2-B
• MOOG-6230 D633-195B A16KO5MOHMV
• MOOG-6231 oil pump
• MOOG-6232 D684-N05AUF4NSM2-A
• MOOG-6233 VSE/R/2-150/NC/BSPP
• MOOG-6234 D634-403C
• MOOG-6235 ITT CA120001-97

An electrohydraulic servo valve is a precision component that acts as an interface between the electrical control system and the hydraulic power system. It receives a low-power electrical analog signal and converts it into a proportional, high-power hydraulic output (flow and pressure).

A Moog servo valve typically consists of a polarized electrical torque motor and a two-stage hydraulic amplifier:

• First Stage: The torque motor deflects an armature and a flapper attached to it. This flapper moves between two nozzles, creating variable orifices that control the pressure on either end of the second-stage spool.
• Second Stage: The differential pressure moves the spool, which then controls the flow of hydraulic fluid to the actuator.

Proper installation is critical for performance and longevity:

• Filtration: Install a precision filter with a rating of 5 microns or less upstream of the servo valve.
• System Flushing: Before installing the servo valve, the entire hydraulic system must be thoroughly flushed to remove contaminants.