Bulk Solids Radar Mechanical Installation: Dust, Impact and Abrasion

Mechanical installation for bulk-solids radar must survive more than static vessel conditions. Fill streams can impact or bury equipment, abrasive particles can erode exposed parts, dust and condensation can build deposits, and silo roofs or brackets can move under vibration and temperature. The antenna must also observe a useful part of an uneven surface without obstruction. A good installation plan connects material and filling behavior to nozzle, projection, beam, support, protection and access, then verifies the completed assembly before software tuning or production acceptance.

Map material movement

Document inlet locations, distributor positions, drop height, filling rate, particle size, angle of repose, rebound, avalanches and discharge funnels. Identify zones of direct impact, burial and severe dust. Place the radar for the required high alarm or surface trend while avoiding the most damaging path. A convenient roof nozzle may not provide a survivable or representative location.

Select a suitable mechanical assembly

Confirm antenna and process connection materials, geometry, temperature, abrasion and hazardous approvals. Review protective shields only when they do not obstruct the beam or create deposits. Do not assume a non-contact transmitter has no process exposure; the antenna and nozzle can experience dust, condensate, impact and corrosive vapour.

Design nozzle and projection

Use the exact antenna drawing for minimum bore, maximum length, antenna projection, reference plane and blocking distance. Avoid internal welds, reducers and steps that create echoes or collect material. Check the full beam against structures and the solids surface. Include gaskets, adapters and roof thickness in the as-built measurement.

Control alignment and structural movement

Specify a measurable aiming direction and bracket tolerance. Check roof stiffness, vibration, wind and thermal movement. Reinforce supports where necessary without transferring unsafe loads to the vessel. Mark final orientation. A narrow beam can move onto a wall or brace when a tall silo bracket shifts by a small angle.

Manage dust and deposits

Review extraction, purge if approved, condensation and safe cleaning access. Seal cable entries and use suitable environmental protection. Provide inspection without unnecessary vessel entry. Set an early-service review based on deposit and signal evidence. If buildup is recurrent, address air quality, mounting or process cause rather than relying on frequent parameter resets.

Protect electrical and hazardous boundaries

Verify grounding, bonding, surge protection, barriers, glands, cable routing and electrostatic considerations. Keep signal cable away from high-power equipment. Match enclosure and approvals to the dust zone and temperature. Field covers, adapters and fasteners should not invalidate the certified construction.

Inspect and commission the as-built installation

Record nozzle, projection, alignment, beam, support, cable sealing and photographs before filling. Capture empty and loaded echo curves, track filling and discharge, and test output, quality, lost echo and high alarms. Retain deviations and maintenance triggers with the equipment record.

Define lost-echo response during filling

Specify what the transmitter, PLC and conveyor or valve system must do when dust or impact causes lost echo. The response should distinguish a short qualified disturbance from sustained measurement failure and must not hold a healthy-looking last value indefinitely. Test the configured delay against maximum filling rate and remaining capacity. Recording this behavior links mechanical installation to operational safety and ensures that a rugged mounting arrangement is not undermined by an undefined failure action.

Engineering checklist

Place equipment outside direct impact zones.
Approve antenna materials and construction.
Measure nozzle and projection as installed.
Allow for roof and bracket movement.
Plan dust inspection and safe cleaning.
Test echo and alarms during real filling.

Frequently asked questions

Can a shield protect the antenna?

Only if it is model- and application-approved and does not block the beam or trap deposits.

Why mark the aiming direction?

It preserves the approved beam target after maintenance or housing rotation.

What should be inspected after early service?

Deposits, abrasion, bracket alignment, sealing, signal margin and high-alarm behavior.

Need a project-specific review? Send process data, drawings, photographs and acceptance criteria through our contact page.