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Y-type Strainer
1 Product Overview
Y-type Strainer is a basic inline coarse filter for pipelines. Fluid enters Y-shaped chamber, solid contaminants are trapped on outer surface of stainless steel basket. Fouling gradually increases differential pressure. For cleaning, upstream & downstream valves must be closed, system depressurized, bottom bonnet removed, filter basket taken out for external flushing before re-commissioning.
Classification Distinction
Y-type Strainer: Basic version, no brush or crank; requires shutdown for basket removal & cleaning.
Hand Brush Y-type Strainer: Equipped with external crank, allows on-line cleaning without flow interruption.
Y-type Self-cleaning Strainer: Electric automatic brush type with PLC control for unattended continuous cleaning.
2 Main Structural Composition
Y-type BodyCast iron / WCB carbon steel / SUS304/316L casting with inlet, outlet and inclined basket chamber.
Stainless Steel Filter Basket304 / 316L perforated or woven screen with reinforcement support.
Bottom Bonnet & FastenersFlange cover and bolt set for disassembly.
Sealing GasketGraphite, EPDM or PTFE gasket to prevent flange leakage.
Optional AccessoriesDrain plug, blowdown ball valve, pressure gauge port assembly.
3 Working Principle
Filtration ModeFluid flows from inlet, passes outward through basket; solid particles retained on basket outer wall, clean medium flows towards outlet. Contaminants accumulate and gradually raise differential pressure.
Cleaning ModeIsolate the strainer by closing isolation valves and depressurize. Remove bottom bonnet and extract basket for flushing. Reassemble, vent and pressurize before restarting pipeline.Note: Pipeline flow must be interrupted; on-line cleaning is not supported.
4 Basic Technical Parameters
Applicable media: clean water, circulating water, oil, steam, neutral process fluidBody material: cast iron, WCB carbon steel, SUS304, SUS316LScreen material: SUS304 / SUS316L stainless steelNominal pressure: PN10 / PN16 / PN25 / PN40; Class150~600 optionalOperating temperature: -20℃～425℃ (depends on material)Filtration rating: 10～400 mesh customizableNominal size: DN15～DN600Connection: flange, internal thread, butt weldInstallation: horizontal / vertical (basket facing downward)Max pressure drop: ≤0.06MPa
5 Core Product Advantages
Standard universal design with easily sourced spare parts.
No moving components, stable construction and low failure risk.
Low initial purchase cost, economical for extensive pipeline matching.
Low fluid resistance with minor impact on pipeline hydraulics.
Wide material selection compatible with water, oil and steam service.
Standardized disassembly procedure, easy operation for maintenance crews.
Compact footprint, directly installable inline without large space.
6 Installation, Commissioning & Maintenance Specification
Install following flow arrow mark; arrange basket chamber downward for sediment settlement.Isolation valves on both sides are recommended; bypass pipeline advised for critical systems.Clean basket before initial commissioning; record clean baseline differential pressure.Monitor DP regularly and shut down for cleaning once threshold reached; avoid long-term overpressure drop operation.Do not strike basket hard during cleaning to prevent deformation; replace aged gaskets timely.Fully clean basket and drain residual water before long-term shutdown to avoid corrosion.
7 Common Faults & Solutions
Rapid rising differential pressureCauses: high inlet impurity load; damaged basket; insufficient upstream pre-filtrationSolutions: install upstream coarse filter; replace basket; optimize front water treatment
Leakage at bonnet flangeCauses: aged gasket; uneven bolt tightening; debris on sealing surfaceSolutions: fit new gasket; tighten bolts diagonally; clean sealing face
Frequent basket cloggingCauses: large amount of welding slag in new piping; high suspended solidsSolutions: shorten cleaning interval during commissioning; add upstream pre-filter
Deformation & rupture of filter basketCauses: impact from large hard debris; long-term excessive DP; hard knocking during cleaningSolutions: adopt reinforced basket; follow cleaning schedule; use low-pressure flushing only
8 Standard Supply List & Optional Accessories
Standard Supply List
Y-type body, stainless steel filter basket, bottom bonnet, bolts, sealing gasket, flow direction nameplate, certificate of conformity.
Optional Accessories
Inlet & outlet pressure gauge set, blowdown ball valve / drain plug, extended bolts, spare basket, ANSI flange configuration。
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