Product Information
A well water desander is a common piece of equipment for handling sand in groundwater, and it's often called a hydrocyclone desander. Water pumped from a well usually carries fine sand and silt. If that goes straight into the pipe network, it wears down pumps and clogs valves, so this groundwater sand removal equipment is used as pre-treatment. It has no moving parts—centrifugal force from the water flow throws sand to the wall where it settles. It's compact, needs no power, and works well for rural water supply and factory or mine wells.
Get a QuoteWell Water Desander | Hydrocyclone Desander | Groundwater Sand Removal Equipment
Working Principle
Water enters tangentially from the top and forms a high-speed spinning flow inside the cylinder. Sand and silt are denser than water, so centrifugal force throws them to the wall, where they slide down the cone into the sand collection chamber. Clear water in the center spins upward and exits through the outlet. Once enough sand builds up in the collection chamber, the drain valve opens and discharges it. The whole separation process runs on inlet pressure, with no external power needed, and it doesn't interrupt continuous water supply.
Application Fields
1.Rural drinking water: removing sand from well water and groundwater as pre-treatment before household supply.
2.Factory and mine wells: protecting downstream pumps, valves, and heat exchangers from wear and clogging.
3.Irrigation systems: sand removal ahead of drip and sprinkler systems to prevent emitter clogging.
4.Industrial water: pre-treatment when groundwater is used as a production water source, reducing turbidity.
FAQ
Q1: What size sand particles can a well water desander remove?
A: It generally separates particles above 0.1 mm, and higher-efficiency models do a decent job on fine sand in the 0.07–0.1 mm range. Very fine silt is hard to remove by centrifugal separation alone and needs filtration equipment downstream. The higher the sand content, the more often you need to drain.
Q2: Does a hydrocyclone desander need electricity?
A: No. It relies entirely on inlet pressure to create the spinning flow, with no motor or moving parts. As long as line pressure is above 0.2 MPa, it works fine. That makes it a good fit for rural well houses or remote intake points without power. If pressure is insufficient, a booster pump is needed.
Q3: How should the sand-laden water from the desander be handled?
A: The first water out during draining is high-concentration sand water. It can go to a sand settling tank or a dedicated drain trench, letting the sand settle for periodic removal. Don't discharge it directly to farmland or rivers—it causes siltation. If sand volume is high, a small sand-water separator can be added to dewater the sand before hauling it away.