How to Clean a Clogged Sand Screw Washer
For sand producers in Nigeria and India, a clogged sand screw washer can bring production to a halt. Knowing how to clean a clogged sand screw washer quickly and safely minimizes downtime and prevents damage to the gearbox, shaft, or screw flights. The Type W screw washer can become blocked by sticky clay, over‑size particles, or a buildup of fines that hardens in the trough. Below we explain a step‑by‑step cleaning procedure and preventive measures. OCP Mechanical Company supports sand plants with durable washers and 24/7 technical assistance.
Signs of a Clogged Screw Washer
Before learning how to clean a clogged sand screw washer, recognize the symptoms:
Reduced or zero sand discharge at the upper end.
Motor current spikes or the screw stalls.
Water overflowing the weir with little sand movement.
Unusual grinding or knocking noises from the trough.
If you notice these, stop the washer immediately. Running a clogged screw can bend the shaft, damage the gearbox, or break the screw flights – a costly repair.
Note: Product data are constantly updated; for the latest specifications of Type W screw washers, please contact our online customer service.
Many sand plants in Lagos and Maharashtra have prevented major damage by acting as soon as they saw the first sign of reduced discharge.
Step‑by‑Step Cleaning Procedure
Follow this practical guide for how to clean a clogged sand screw washer safely:
Step 1 – Shut down and lock out power.
Isolate the motor and conveyor feeds. Drain water from the trough by opening the drain plug or lowering the weir.
Step 2 – Reverse the screw (if equipped).
Some Type W screw washers have a reversible drive. Running the screw backward for 10‑20 seconds can dislodge soft clogs. Do not run backward for more than 30 seconds, as it may unscrew the shaft coupling.
Step 3 – Manual removal.
If reversal fails, open the inspection door(s) at the lower end. Use a high‑pressure water jet (100‑200 bar) to break up compacted material. For stubborn clays, use a long‑handled shovel or a digging bar to loosen the buildup. Never put your hands inside while the screw could move.
Step 4 – Flush the trough.
Restart the washer in forward direction with water only (no feed). Run for 2‑3 minutes to wash out loose debris. Check that sand discharges normally before resuming production.
Many operators in Nigeria’s Ogun State have found that a monthly inspection and cleaning routine keeps the screw clog‑free. A high‑pressure water lance through the inspection door every 50 hours is a simple preventive measure.
The above values are for illustration only. OCP continuously improves its products. Contact our online team for the most current data sheet.
Preventive Measures to Avoid Clogs
Prevention is better than cure. Use these tips to reduce the frequency of how to clean a clogged sand screw washer:
Install a desliming screen ahead of the washer – Remove material below 0.5 mm before it enters the screw. A vibrating screen with fine mesh (0.5‑1.0 mm) reduces clay and silt that cause packing.
Control feed rate – Do not exceed the screw washer’s rated capacity (e.g., 100 tph for Type W‑100). Overloading forces sand against the trough walls, promoting buildup.
Optimize water flow – Insufficient water allows fines to settle and harden. Maintain a water to solids ratio of 1.5‑2:1 in the trough.
Inspect water nozzles – Clogged spray bars reduce washing effectiveness. Clean nozzles weekly.
OCP’s Type W screw washer features bolt‑on wear shoes and easily accessible inspection doors. Regular maintenance extends screw life and reduces cleaning downtime.
Why OCP Is Your Partner for Sand Washing
Understanding how to clean a clogged sand screw washer keeps your plant running profitably. OCP Mechanical Company has over 40 years of history in sand processing equipment. We offer:
Free pre‑sale clog‑resistance assessment based on your sand source.
Factory‑direct pricing on screw washers, with reversible drive option and polyurethane shoes.
24/7 online technical support for troubleshooting and parts replacement.
For a no‑obligation consultation and personalized advice on how to clean a clogged sand screw washer for your plant, simply click the live chat icon on this page. Our online customer service team is available 24 hours a day, 7 days a week, to answer your technical questions, provide free recommendations, and help you minimize downtime.
