Model Code Explanation (D661-4479C)D661: Series (ISO 4401‑05 mounting, integrate ...

II. Model Meaning (Segmented Explanation)D661: Basic Series, ISO4401-05, Integra ...

II. Model Meaning (D661-446xC)D661: Basic series, ISO4401-05, bushing valve core ...

II. Model Meaning (D661-4450C - Estimated)D661: Series (ISO4401-05, 24V integrat ...

Model Code Explanation (D661-4444C)D661: Series (ISO 4401‑05, 24 VDC integrated ...

Model Code Explanation (D661-4444C)D661: Series (ISO 4401‑05, 24 VDC integrated ...