Hydrocyclones use centrifugal action to classify, separate or thicken solids in slurry. Pressurized slurry enters tangentially and forms a swirling flow. Coarser or denser particles move towards the wall and leave through the underflow, while finer or lighter particles follow the inner vortex through the overflow pipe. There are no moving parts, but internal erosion can be severe. Linings and replaceable inserts are the principal wear parts. Applications include grinding circuit classification, desliming and thickening.
Equipment Parts
Part Identification and Technical Details
Explore part names, images, material options and technical requirements. Select a card to open the corresponding replacement part page.
Major Components and Assemblies
Major Components and Assemblies
Individual and Maintenance Parts
Individual and Maintenance Parts

01
Cylinder Liner / Upper Liner
- Material Options
- Polyurethane / rubber / high-chromium cast iron / ceramics
- Installation and Function
- Wear protection for the inner wall of the cylindrical section
- Maintenance Category
- High

02
Cone Liner / Lower Liner
- Material Options
- Polyurethane / rubber / high-chromium cast iron / ceramics
- Installation and Function
- Wear protection for the inner wall of the conical section
- Maintenance Category
- Very High

03
Vortex Finder
- Material Options
- Polyurethane / ceramics / high-chromium cast iron
- Installation and Function
- Prevent short-circuit flow and direct the fine-particle overflow
- Maintenance Category
- High

04
Vortex Finder Insert
- Material Options
- Ceramics / polyurethane
- Installation and Function
- Replaceable vortex finder lining
- Maintenance Category
- High

05
Apex / Spigot
- Material Options
- Polyurethane / ceramics / high-chromium cast iron
- Installation and Function
- Underflow outlet that controls the solids concentration of the underflow
- Maintenance Category
- Very High

06
Apex Insert
- Material Options
- Ceramics / polyurethane
- Installation and Function
- Replaceable liner for the underflow spigot
- Maintenance Category
- Very High

07
Inlet Head / Feed Chamber
- Material Options
- Polyurethane / high-chromium cast iron
- Installation and Function
- Tangential feed inlet area
- Maintenance Category
- High

08
Inlet Nozzle Liner
- Material Options
- Ceramics / polyurethane
- Installation and Function
- Inlet nozzle wear protection
- Maintenance Category
- High

09
Cylinder Section Ring
- Material Options
- Stainless steel / polyurethane
- Installation and Function
- Connection and seal between liner segments
- Maintenance Category
- Low

10
Overflow Pipe Liner
- Material Options
- Polyurethane / rubber
- Installation and Function
- Protects the overflow discharge piping
- Maintenance Category
- ZH
Materials for similarly named parts may differ by OEM, machine model and operating conditions. Confirm the machine model, OEM drawing number and measured dimensions before ordering or manufacture.
Material Information
- Polyurethane (PU): a candidate hydrocyclone lining material. Temperature resistance, hydrolysis resistance and fluid compatibility depend on the specific formulation and operating conditions.
- A05 high-chromium cast iron: a candidate metal lining for concentrated slurries containing coarse particles.
- Alumina ceramics (Al₂O₃ 92%): candidate hydrocyclone linings and inserts for severe abrasion.
- Silicon carbide ceramics (SiC): a candidate for hot, corrosive service.
- Wear-resistant rubber: a candidate lining for fine-particle slurries. Select the grade for slurry temperature, chemistry and the original specification.
Brand Applicability
Metso MHC Series (Finland), FLSmidth Krebs (Denmark/USA), Weir Cavex (UK/Australia), Multotec (South Africa), AKW (Germany), Haiwang (China)
Industry Applications
Grinding circuit classification, tailings desliming and thickening, coal slurry classification, sand and aggregate washing, chemical slurry separation and drilling mud treatment
Materials for similarly named parts may differ by OEM, machine model and operating conditions. Confirm the machine model, OEM drawing number and measured dimensions before ordering or manufacture.