Shield lite Silo Protection System

SKU: Shield Lite

Manufacturer: Hycontrol

The Shield Lite compact panel monitoring and control equipment from Hycontrol gives 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. It is simple to install, can be retro-fitted to existing tank silos and is easy to operate.

pdf datasheet

Powder storage silos are commonplace in many industries handling cement, lime, sugar flour an others but are at risk of 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 poses serious risks, which is why a comprehensive, failsafe safety and control system is vital.

A silo protection system (SPS) is the name given to an interlinked collection of safety devices on a silo. In its most basic form, it should monitor pressure in the silo during a fill and take action to protect the vessel if anything goes wrong. The essential components of a standard SPS are as follows:

(1) Pressure relief valve (PRV)
(2) Pressure sensor
(3) High-level alarm probe
(4) Air filter (binvent or venting unit)
(5) Control and alarm panel at the fill point

(6) Shut-off valve on the fill pipe


SHIELD Lite incorporates essential high-accuracy pressure safety components into a modular design that can be adjusted to suit site requirements. 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.