This client required a turnkey four‑channel silo protection system to ensure safe, controlled filling operations across multiple silos. The installation needed to monitor internal silo pressure, prevent overfilling, and provide operators with clear status information both during normal daytime deliveries and out‑of‑hours operation. The new system also had to work seamlessly alongside the existing silo level gauging and high‑level alarms already in place.
To deliver this, we designed a complete protection package built around Afriso DMU 03 pressure transmitters for continuous internal silo pressure monitoring. Overfill protection is provided by Afriso ENT 7 STF self‑test capacitance level switches with flexible sensing probes, ensuring reliable activation and easy routine testing. Operators manage the filling process through a dedicated control panel covering all four silo fill points, with a two‑key access system to ensure product is delivered into the correct silo every time.
The system was engineered to give operators clear visibility and controlled shutdown under alarm conditions, with the following core functionality:
- Internal silo pressure indication on local displays
- Silo overfill alarms via ENT 7 STF self‑test capacitance switches
- Four‑channel operator control panel for silo fill points
- Two‑key access operation for correct silo selection
- Audio/visual alarms for high silo pressure, silo overfill, PRV blockage, filter blockage, compressor air failure and inlet isolating valve status
- Controlled shutdown of filling operations under alarm conditions
- Full status and fault information displayed on the internal readout
The completed installation provides a robust, integrated silo protection system that enhances operational safety, improves operator awareness and ensures controlled product delivery at all times — all delivered as a turnkey solution tailored to multi‑silo industrial sites.
