I. Basic Information

Model: A67999-100

Applicable series: MOOG 761, 631, G761 electro-hydraulic servo valves (including the A67999-065 you just checked)

Filter accuracy: 10 μm (micrometers)

Material: Stainless steel woven mesh + metal end cover

Packaging: Single unit / Set (commonly 10 units / package)

Origin: USA / Germany

Status: In production, standard consumable spare parts, stable supply

II. Function and purpose

Protect the servo valve pilot stage: Intercept tiny impurities (≥10 μm) in the oil, preventing nozzle, baffle, and throttle hole from clogging or wearing

Ensure servo accuracy: Avoid pilot stage jamming, increase in zero drift, and excessive hysteresis

Extend servo valve lifespan: Reduce valve core / valve sleeve wear, lower the risk of failure and downtime

Installation location: Internal oil inlet of the servo valve or pilot oil path (cannot be omitted)

III. Key parameters

Filter accuracy: 10 μm

Maximum working pressure: 210 bar (3000 psi)

Working temperature: -20℃ ～ +60℃

Compatible media: Hydraulic oil (ISO VG 32/46/68), anti-fouling oil

Sealing: Standardly equipped with fluororubber (Viton) sealing ring, resistant to high temperature / corrosion

IV. Applicable servo valve models (partial)

A67999-065 (the 761 series servo valve you queried in the previous item)

G761-3002B, G761-3003B, G761-3004B, G761-3005B

631 series: D633, D634, etc. direct drive servo valves

760 series, 79 series servo valves (some models)

V. Replacement cycle and recommendations

Regular operation: Replace once every 6 to 12 months

Severe contamination operation: Replace once every 3 to 6 months

Replacement reminder: When zero drift increases, response slows down, hysteresis exceeds the limit, or abnormal noise occurs, check the filter element first