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T: +86-17717097520
E: sales1@melko2015.com
E: sales1@melko2015.com
No.222 Xiangche Rd. Chedun Town Songjiang Dist. Shanghai China 201611
Filter housings (also known as filter casings or filter vessels) are pressure-rated containers that securely hold filter cartridges or bag filters within liquid filtration systems. These critical components must withstand operating pressures, resist chemical corrosion, and provide safe access for filter element replacement. Shanghai Melko Filtration Equipment Co., Ltd. manufactures ASME-certified filter housings engineered for demanding industrial, commercial, and municipal water treatment applications where system reliability directly impacts production continuity and water quality compliance.
While filter cartridges remove contaminants, the housing controls flow dynamics, pressure integrity, and maintenance efficiency. An improperly specified filter vessel creates turbulence that reduces filtration effectiveness, generates excessive pressure drop, and accelerates filter element wear. Our engineering approach addresses four critical housing design factors: pressure rating compatibility, corrosion resistance matching water chemistry, seal integrity under thermal cycling, and service accessibility that minimizes downtime. Each housing we manufacture undergoes hydrostatic pressure testing at 1.5x maximum working pressure to verify structural integrity before shipment.
Our SS304 and SS316L stainless steel filter housings deliver superior corrosion resistance for acidic, alkaline, and high-chloride water applications. The 316L variant—containing 2-3% molybdenum—provides enhanced pitting resistance in coastal environments and brine solutions. All stainless housings feature sanitary polished interiors (Ra ≤ 0.8 μm) that prevent bacterial colonization, making them ideal for pharmaceutical water systems, food-grade beverage processing, and ultrapure water production. Welded construction eliminates threaded connections that trap contaminants, while tri-clamp or flanged closures enable tool-free element replacement in under 3 minutes.
Injection-molded PP filter housings resist strong acids (pH 1-3) and caustic solutions (pH 11-14) that corrode metal vessels, offering 60-70% cost savings versus stainless steel for non-sanitary applications. Our reinforced polypropylene formulation maintains structural integrity at temperatures up to 80°C (176°F) while supporting working pressures to 150 PSI. Clear housing bodies—available in 10", 20", and 30" lengths—provide visual filter condition monitoring without system shutdown. These housings excel in electroplating rinse water filtration, chemical manufacturing process streams, and aggressive wastewater pre-treatment where metal contact is prohibited.
FRP filter housings combine the corrosion resistance of plastics with the structural strength of stainless steel, supporting flow rates exceeding 500 GPM in a single vessel. Epoxy resin construction tolerates continuous exposure to seawater, industrial solvents, and petroleum derivatives. Multi-cartridge housings—accommodating 4 to 61 filter elements—deliver high dirt-holding capacity with minimal footprint, reducing installation space requirements by 40-50% compared to multiple single-cartridge housings. Side-entry or top-entry configurations adapt to existing piping layouts without costly modifications.
Swing-bolt closure mechanisms eliminate the need for wrenches and labor-intensive dis-assembly. Operators simply swing aside 3-6 locking bolts and lift the housing cover—no threading, no tools, no heavy lifting. This design reduces filter replacement time by 75% compared to threaded housings, critical for continuous-operation facilities where downtime costs exceed $5,000 per hour. Silicone or Viton O-rings ensure leak-free sealing even after 500+ opening cycles.
Parallel dual-housing systems with three-way diverter valves enable uninterrupted flow during filter maintenance. While one housing filters, the second remains on standby. During element replacement, operators valve-switch flow to the standby housing without shutting down pumps or halting production. This configuration is mandatory for critical processes in pharmaceutical manufacturing, semiconductor fabrication, and continuous food production lines.
Our single-bag and multi-bag filter housings accept #1, #2, and #4 standard bag sizes, providing 10-50 times the dirt-holding capacity of equivalent cartridge housings. Top-entry design with hinged covers allows bag replacement in under 60 seconds without disconnecting piping. Perforated baskets support bag sidewalls, preventing bypass flow even at 100+ GPM flow rates. These housings excel in paint booth water filtration, coolant recirculation, and wastewater solids capture where high suspended solids concentrations (500+ mg/L) would rapidly clog cartridge filters.
| Feature | Melko Standard | Industry Typical |
|---|---|---|
| Pressure Testing | 100% tested to 1.5x MWP | Batch sampling only |
| Material Certification | Mill test reports provided | Available on request |
| O-ring Material Options | 7 elastomers (EPDM to Kalrez) | 2-3 standard options |
| Custom Port Locations | No minimum order quantity | 500+ unit minimums |
| Lead Time (Standard) | 5-7 business days | 3-4 weeks |
Our filtration engineers provide pressure drop calculations, material compatibility analysis, and 3D CAD drawings for seamless integration into your process. Whether you require sanitary stainless housings for USP pharmaceutical water, chemical-resistant PP vessels for aggressive process streams, or high-flow multi-cartridge FRP housings for industrial wastewater—we deliver engineered solutions with documented performance validation. Request technical specifications and pressure/flow curves for your application today.
