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Hand Brush Basket Strainer
1 Product Overview
Hand Brush Basket Strainer is a mechanically driven on-line self-cleaning coarse filter, upgraded from conventional basket strainer with built-in rotary brush assembly. Fluid flows horizontally into vessel, solid contaminants are trapped on inner wall of stainless steel basket. As fouling accumulates and differential pressure rises, operator opens bottom blowdown ball valve and continuously cranks external handle to drive internal brushes for circumferential sweeping. Contaminants embedded inside mesh are stripped off and discharged through drain port under medium pressure.
Different from Y-type strainers & fixed basket filters, cleaning process requires no top cover opening and basket extraction, pipeline flow remains uninterrupted. It is preferably installed upstream of pumps and heat exchangers as primary barrier to intercept pipeline rust, sediment & floating debris.Versions fitted with wedge wire mesh deliver superior abrasion resistance and anti-deformation performance, ideal for water containing fiber, algae & colloidal contaminants.
2 Main Structural Composition
Vertical Pressure Vessel Housing AssemblyEpoxy coated carbon steel / stainless steel rolled & welded cylinder, horizontal inlet & outlet flanges, top maintenance cover and bottom drain connection.
Stainless Steel Cylindrical Basket AssemblyIntegrated multi-layer woven / wedge wire screen with reinforced supporting frame to resist flow impact & mesh bulging.
Rotary Brush Cleaning MechanismCircumferential wear-resistant bristle set, central drive shaft & external crank handle with independent mechanical shaft seal.
Bottom Manual Blowdown Valve GroupStraight-through ball valve with large bore flow path to minimize throttling and ensure smooth sludge discharge.
DP Pressure Tapping Port (Optional)Reserved tapping for pressure gauge to monitor clogging level and schedule cleaning.
Support Skirt & Lifting LugsIntegrated welded base; lifting lugs equipped on large-size units for convenient hoisting installation.
3 Working Principle
Solid-contaminated medium enters chamber via inlet and penetrates basket radially. Particles larger than mesh aperture are retained on inner surface of basket; purified fluid flows continuously toward downstream pipeline.Long-term operation leads to mesh clogging and rising differential pressure. Initiate cleaning cycle: open bottom blowdown valve and rotate external crank handle steadily. Shaft drives annular brushes to perform 360° cyclic sweeping closely against screen surface.Sludge & rust scale stripped by brushes converge downward and discharge via drain piping. After several full rotations, DP recovers to normal range, then close blowdown valve to complete one self-cleaning cycle without system shutdown.
4 Basic Technical Parameters
Applicable medium: industrial circulating water, cooling water, heating hot water, light mineral oil, fresh water, low-concentration ethylene glycol solutionHousing material: epoxy coated Q235-B carbon steel / 304 / 316L stainless steelNominal pressure: PN16, PN25 (custom high pressure up to 4.0 MPa)Operating temperature: 0～120℃ (jacketed version up to 180℃)Filter rating: 5 mesh ~ 150 meshNominal diameter: DN50 ~ DN600Installation: inline horizontal flanged mountingCleaning method: external hand crank mechanical brushingDischarge mode: continuous manual on-line blowdownMax pressure drop at rated flow: ≤0.018 MPa
5 Core Product Advantages
Manual crank self-cleaning without motor, electric control or air supply, suitable for explosive-proof, humid & open-air harsh environments.
No cover opening & basket removal during cleaning, drastically cutting maintenance time & labor workload.
Bidirectional flow structure prevents deep embedding of contaminants inside mesh for thorough brush stripping.
Compact vertical cylinder saves horizontal pipe rack space, easy retrofitting for multi-layer pipe supports & compact machine rooms.
Large bore bottom drain eliminates dead sediment zone, perfect for raw water with high sediment load.
Reinforced basket withstands transient water hammer, stable long-term service under frequent start-stop pipeline conditions.
Flexible material options: carbon steel for clean water; stainless steel for seawater & mildly corrosive fluid.
Multiple units can be installed in parallel for switchover operation to achieve zero water interruption for continuous production lines.
Simple maintenance routine, only regular brush wear inspection & aged seal replacement required.
Standardized domestic design with fully interchangeable spare parts, direct drop-in replacement for imported Brush Basket Strainer.
6 Installation, Commissioning & Maintenance Specification
Install strictly following flow arrow marking on housing; reverse inlet/outlet connection prohibited. Fit temperature-resistant gasket between flanges and tighten bolts evenly in diagonal sequence.Preferred installation position: suction side of circulating pump and upstream of plate heat exchanger on straight horizontal pipe sections to reduce vortex disturbance.Remove welding slag & metal debris inside vessel via maintenance cover before commissioning; verify smooth crank rotation without jamming.Record differential pressure trend during daily patrol to arrange predictive cleaning. Execute blowdown once DP exceeds preset threshold.Fully inspect mesh perforation & bristle wear during annual overhaul, replace complete shaft sealing assembly simultaneously.Install upstream coarse screen pre-treatment if medium carries massive long fiber & weeds.Close isolation valves and drain residual water inside vessel during long-term shutdown to mitigate internal stagnant water corrosion & scaling.
7 Common Faults & Solutions
DP cannot recover fully after brushing, poor cleaning efficiencyCauses: shortened worn brush away from screen; fine particles deeply embedded; insufficient blowdown valve openingSolutions: install brand-new brush assembly; off-line chemical soaking cleaning; fully open drain valve to boost blowdown flow
Persistent dripping leakage at shaft penetrationCauses: aged worn mechanical seal; eccentric deformed shaft; uneven compression of gland coverSolutions: replace complete shaft seal set; calibrate shaft concentricity; evenly retighten gland bolts
Stiff crank rotation with abnormal noise & stickingCauses: hard foreign object jammed between brush and screen; internal rust adhesionSolutions: open cover and extract foreign debris; derust shaft & apply water-resistant lubricant
Low blowdown flow, incomplete sludge purgingCauses: throttled small-bore drain piping; hardened sediment lump at bottom sumpSolutions: enlarge drain pipeline; extend single brushing & purging duration
Frequent basket perforation damageCauses: excessive instantaneous flow impact; over-fine mesh selection; medium carrying sharp hard particlesSolutions: install pipeline buffer device; select coarser mesh grade; add primary upstream pre-filter
8 Standard Supply List & Optional Accessories
Standard Supply List
Vertical pressure vessel housing, stainless steel basket assembly, rotary brush cleaning unit, external crank handle, bottom blowdown ball valve, inlet & outlet flanges, complete sealing parts, flow direction nameplate, operation manual.
Optional Accessories
Spare baskets of different mesh ratings, DP pressure gauge assembly, wear-resistant PU bristle set, thermal insulation cladding, ANSI standard flange, extended drain piping kit, explosion-proof isolation sealing kit。
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