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High Flow Security Filter
1 Product Overview
High Flow Security Filter is a pressure-driven precision filtration vessel designed for large-diameter pleated high-flow cartridges, commonly installed upstream of membrane modules in medium & large water treatment systems. Medium passes through high-flow cartridges (outside-in or inside-out based on cartridge type). Suspended particles and colloids are retained on filter media, while purified fluid flows towards high-pressure pumps and membrane assemblies.
Different from conventional standard security filters, each high-flow cartridge delivers throughput dozens of times higher than ordinary PP melt-blown elements. It achieves large processing capacity with far fewer cartridges, resulting in smaller vessel dimensions and drastically reduced element replacement workload. It is the preferred pre-protection equipment for large pure water stations, power plants and seawater desalination projects.Cartridges with inside-out or outside-in flow direction are available according to process requirements. Mirror-polished sanitary vessels satisfy high cleanliness demands in electronics and pharmaceutical fluid treatment.
2 Main Structural Composition
Vertical Pressure Vessel Housing AssemblyRoll-welded SUS304 / SUS316L stainless steel cylinder with elliptical heads, side inlet & outlet flanges and top service opening.
High Flow Cartridge Support Plate AssemblyThickened stainless steel perforated plate fitted with U-type seal seats to guarantee reliable end sealing and prevent fluid bypass; optional anti-vortex flow distributor.
High Flow Pleated Cartridges (Matching Elements)40” / 60” large diameter cartridges with PP, glass fiber or PTFE media, filtration rating 1~100μm.
Top Air Vent & Bottom Blowdown AssemblyFloat auto vent continuously removes trapped air; straight-through drain ball valve discharges settled sediment rapidly.
DP Pressure Tapping PortReserved connections for pressure gauge / DP transmitter to monitor clogging differential pressure.
Top Cover Locking MechanismQuick-release clamp or eyebolt sealed cover equipped with high-temperature resistant silicone gaskets.
Support Skirt & Lifting LugsIntegrated welded support legs; lifting lugs equipped on large-size vessels for hoisting installation.
3 Working Principle
Medium containing fine particles and colloids enters filter chamber and is evenly distributed to each high-flow cartridge under system operating pressure.Fluid penetrates pleated media; suspended solids, broken resin and activated carbon powder larger than nominal rating are intercepted. Clean medium converges and exits toward high-pressure pumps and membrane systems.Contaminant accumulation reduces effective flow area and gradually raises differential pressure. When DP reaches warning limit (0.08~0.10MPa), shut down and replace cartridges to avoid element breakthrough which will carry raw contaminants to damage downstream membranes.After replacement, seal top cover and fully purge trapped air before restarting continuous operation.
4 Basic Technical Parameters
Applicable medium: purified water, condensate, cooling circulating water, seawater, low-viscosity neutral & mildly corrosive process fluidHousing material: SUS304, SUS316L stainless steelNominal pressure: PN10, PN16 (custom high pressure up to 2.5 MPa)Operating temperature: 5～70℃ (jacketed version max 95℃; glass fiber cartridge up to 120℃)Compatible cartridge size: 40”, 60” standard high-flow cartridgeAvailable filtration rating: 1μm, 3μm, 5μm, 10μm, 20μm, 50μm, 100μmCartridge configuration: 1 / 2 / 3 / 4 / 5 / 7 pcs seriesNominal flange size: DN80 ~ DN350Installation: vertical flanged floor mountingRecommended cartridge replacement DP: 0.08～0.10 MPaMax pressure drop with new cartridges at rated flow: ≤0.02 MPa
5 Core Product Advantages
High single-element throughput requires fewer cartridges for equal flow, smaller vessel size and lower civil & piping investment.
Large filtration area of pleated media provides high dirt holding capacity and mild DP rise, extending service life.
Fewer cartridges cut replacement time, minimizing system downtime and labor cost.
Optimized internal flow distribution balances loading on all cartridges and prevents premature local fouling.
U-type end sealing delivers reliable tightness and eliminates fluid bypass to stabilize filtration efficiency.
Two cover opening solutions: quick clamp for medium-low flow; eyebolt closure for high-pressure heavy-duty service.
Flexible material selection: SUS304 for clean water; SUS316L for seawater & mild chemical corrosion.
Multiple units can be installed in parallel to satisfy flow demand of thousand-ton large-scale water treatment systems.
Standard flange dimensions enable convenient retrofitting on existing large water projects.
Integrated vent, drain and DP monitoring simplify daily operation and reduce human error.
6 Installation, Commissioning & Maintenance Specification
Install strictly following flow arrow marking; reverse inlet/outlet connection prohibited. Fit temperature-resistant sealing gasket between flanges and tighten bolts evenly in diagonal sequence.Preferred installation location: straight pipe upstream of high-pressure pump, keep away from elbows and tees causing turbulence.Remove welding slag & metal debris inside vessel before commissioning; verify smooth auto vent operation without sticking.Record differential pressure trend during daily patrol and arrange full cartridge replacement once DP exceeds warning threshold.Open vessel during annual overhaul to inspect internal corrosion & plate deformation, replace all silicone sealing gaskets simultaneously.Install multimedia / activated carbon pre-filter if inlet water turbidity remains persistently high.Close isolation valves and drain residual water during long-term shutdown to keep interior dry and prevent rust formation.
7 Common Faults & Solutions
DP rises rapidly, frequent cartridge replacement requiredCauses: excessive inlet suspended solids; failed upstream pretreatment; over-fine filter rating selectedSolutions: overhaul upstream pre-treatment; add primary coarse filter; select appropriate larger micron rating
Fine contaminants persist in outlet water (cartridge breakthrough / seal leakage)Causes: long-term over-DP operation; failed end sealing; cracked filter mediaSolutions: replace cartridges on schedule; clean seal base before reinstallation; adopt reinforced high-flow cartridges
Persistent seepage at top cover flangeCauses: aged deformed gasket; uneven bolt tension; distorted sealing surfaceSolutions: install brand-new silicone gasket; retighten fasteners diagonally; rework cover sealing plane if necessary
Poor air venting, frequent air lock & pump abnormal noiseCauses: clogged auto vent; massive trapped air inside vesselSolutions: clean or replace air vent; fully purge air before startup
Actual flow lower than design rated capacityCauses: multiple clogged cartridges; partially closed pipeline valves; throttled pipingSolutions: replace complete cartridge set; fully open isolation valves; upgrade inlet/outlet pipe size
8 Standard Supply List & Optional Accessories
Standard Supply List
Vertical stainless steel pressure vessel, high flow cartridge support plate assembly, top cover locking unit, auto air vent, bottom blowdown ball valve, DP tapping connections, inlet & outlet flanges, complete sealing parts, flow direction nameplate, operation manual.
Optional Accessories
High flow pleated cartridges of various ratings, DP transmitter & alarm set, steam thermal insulation jacket, sanitary sterile sealing kit, anti-vortex flow distributor, ANSI standard flange, explosion-proof electric blowdown control kit。
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