SHIELD Lite Silo Protection System

Hycontrol’s updated SHIELD Lite silo protection system is the most advanced SPS on the market today and results from decades of silo pressure technology development, experience and expertise. A proven, failsafe solution to silo over-pressurisation, it has a compact, all-in-one design that retrofits to almost any silo. This new model is even simpler to install and operate; the silo-top unit ships pre-wired with the level probe, pressure sensor, and PRV test mechanism already installed. The best silo protection system just got better.

Using purpose-designed, state-of-the-art pressure monitoring and control equipment, SHIELD Lite meets and exceeds best engineering practices and guidance from the Mineral Products Association. The new, compact panel is designed for simple operation and to be easily understood, giving users a range of new monitoring and diagnostic tools and indicating when the system is suffering from blocked filtration or endangered by poor delivery driver behaviour.

Powder storage silos are commonplace in many industries but risk over-pressurisation during tanker deliveries. The root causes of this are invariably either driver error resulting in uncontrolled air pressure being discharged during the filling procedure or a failure of the filter venting unit. Pressures from as little as 1 or 2 psi are enough to rupture a silo or blow its filter unit off the top. This factor poses serious risks, which is why a comprehensive, failsafe safety and control system is vital. 

System maintenance is simplified, and the long-term cost of ownership is significantly lower than any other system on the market. Along with many new features, SHIELD Lite incorporates Hycontrol’s pioneering Ground Level Testing system, in which a single key-turn enacts a full-function test of all the crucial safety components, dramatically reducing the need for working at height. Importantly the system is also wholly failsafe, a vital but often overlooked feature. The system can now even inform users if there has been an attempt to override the inlet safety valve.

For further information on SHIELD Lite SPS, please download the datasheet below or review the videos to the right. If you want to discuss how comprehensive silo protection can ensure your site is safe, please contact us to talk to one of our specialists and arrange a live online demonstration.

  • Key Benefits of SHIELD Lite Silo Protection System
    • The most advanced silo protection system on the market today - a new concept in silo protection from the experts in the field
    • Remove human errors and reduce risk with Ground Level Testing and automatic safety
    • Reduce working at height dangers arising from routine inspections and tests
    • Improve site safety with Ground Level Testing and advanced pressure control
    • Remove the risk of silo pressure damage - vessels can rupture at pressures above one psi without proper controls in place
    • Comprehensive event logging helps prevent override attempts and bad practice
    • Failsafe design and system operation - you will always know if there is a problem before or during a fill, without creating risk!
    • Reduce environmental emissions through properly controlled deliveries
    • Easy-to-use one-key Ground Level Testing system guarantees complete silo protection and will not allow filling unless all safety components are proven fully functional
    • GLT checks the whole system in six seconds - also reduces maintenance time and service costs
    • Pressure and vacuum control - the unique pressure sensor detects not only pressure but also vacuum. If this condition is detected, it will fully open both the inlet and pressure relief valves to remove the vacuum before silo damage occurs 


  • Key Features of SHIELD Lite Silo Protection System
    • New, compact IP65-rated panel with integrated beacon and siren, clear LED screen, easily visible operating instructions and individual failure alert lights
    • New ratio alarms help identify filter blockage or driver behaviour problems, forcing corrective action
    • Records and provides totalised counts for pressure, level, and PRV opening events to aid and direct preventative maintenance
    • VIPER seals - eliminates air leakage and water ingress. Easy to remove and replace
    • Easy-grip, quick release cover retainers enable easy inspection and cleaning on the silo-top
    • Local pressure relief valve (PRV) lifting button for cleaning and seal inspection
    • Durable polypropylene weather shield to protect the PRV and electronics
    • Corrosion-resistant, powder-coated steel body for durability in all conditions
    • Multi-point mounting holes for easy retrofitting - fits most popular connections or to mount on new upstand unit
    • High-specification pneumatic filter regulator with auto-drain to provide accurate compressed air control
    • Integrated, purpose-designed silo pressure sensor with Ground Level Test (GLT) capability and self-cleaning function
    • Integrated pressure relief valve (PRV) with GLT function - cycles the valve as part of the pre-fill test routine and records lifts during filling
    • Low-friction spring guides reduce wear during testing and improve spring longevity
    • Integrated test electronics and pre-wired level and pressures switches for a simple installation and set-up
    • Failsafe butterfly inlet control valve only opens when all safety tests are passed
    • Fill valve automatically shuts should pressure spike, PRV open or high-level activate
    • Integrated inlet valve switch status feedback detects if open or closed, with antitamper detection and logging
    • Monitors and controls air to the filter/vent unit, ensuring supply to the self-cleaning system and eliminating wastage
    • GLT activated with single key turn and tests the whole system in six seconds
    • Utilises DP Series vibrating probes for high-level alarm - fully testable and self-cleaning
    • Safe, low voltage power requirements - entire SHIELD Lite system operates on a 24 V DC power supply


SPS-SHIELDLITE20PFTF Operating Instructions
Mineral Products Association Silo Protection Guidance 2022
SHIELD Lite 2 Silo Protection System - Brochure
ShieldLite20 V3 Install Manual
SHIELD Lite Silo Protection System - Brochure på dansk
SHIELD Lite Silo Protection System - Brochure en français
Eleven Points to Consider Before Purchasing a Silo Protection System

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