Bag Filter for Water Treatment

Suspended solids, rust, sand, algae, and particulate contaminants can clog nozzles, foul membranes, degrade product quality, and trigger equipment failure. Our industrial bag filters for water treatment deliver reliable, cost-effective solid-liquid separation with flow rates up to 200 GPM per housing and filtration efficiencies from 1 to 1,000 microns. Engineered with 304/316L/2205 stainless steel housings, FDA-compliant filter bags, and quick-open closures, our systems protect downstream processes in power plants, food & beverage lines, pharmaceutical facilities, municipal utilities, and semiconductor fabs-while reducing maintenance time and operational costs.

It is also compatible with domestic and foreign consumable sizes to provide customers with convenient and efficient filtration equipment to meet their front-line needs.

Compared to cartridge or sand filters, bag filter systems offer unique advantages for industrial water applications:
* High dirt-holding capacity: Bags capture more solids before pressure drop spikes-extending change intervals.
* Rapid changeouts: Replace a bag in under 2 minutes vs. hours for media backwash or cartridge replacement.
* No media migration: Unlike sand filters, bags won't release fines during operation.
* Scalable design: Single to multi-bag housings (2", 7", 12" configurations) handle 5–2,000+ GPM.
* Low initial cost: Up to 40% cheaper than equivalent cartridge systems for coarse filtration (>10µm).
* FDA/USP Class VI compliant bags: Safe for food, pharma, and potable water contact.

1. Standard SS304/SS316 Bag Filter Housings

* Materials: 304 or 316/316L stainless steel (electropolished optional)
* Configurations: Single, duplex (for continuous flow), or multi-bag (up to 24 bags)
* Connections: NPT, ANSI flange, DIN, tri-clamp (sanitary)
* Pressure Rating: 150 psi @ 100°C (212°F)
* Ideal For: Cooling tower side-stream, RO prefiltration, process water polishing

2. Sanitary Bag Filters for Food, Beverage & Pharma

* Design: Tri-clamp or SMS connections, fully drainable, no dead zones
* Finish: Ra ≤ 0.8 µm electropolished interior
* Filter Bags: Polypropylene or nylon, FDA 21 CFR 177 compliant, USP Class VI tested
* Applications: Bottled water, syrup filtration, CIP return lines, purified water loops

3. High-Flow Industrial Systems (Duplex & Skid-Mounted)

* Flow Capacity: 100–2,000+ GPM
* Automation: PLC-controlled with differential pressure monitoring and alarm
* Redundancy: Duplex design ensures uninterrupted flow during bag change
* Industries: Power generation, oil & gas produced water, chemical processing, mining

4. Custom Solutions

Options Include:

- High-temperature housings (up to 200°C / 392°F)

- Explosion-proof designs (ATEX/IECEx)

- Conductive bags for static-sensitive fluids

- Multi-stage filtration skids (bag + carbon + cartridge)

* Food and beverage industry: beer, wine, wine, sake, liquor, wine, fruit juice, bottled water, tea drinks, soy milk, syrup, dairy products, food additives, water filtration to clarify the process and CIP.

* Petrochemical industry: all kinds of lubricants and oil, glue, chemical fiber manufacturing process of various solution was filtered.

* Oil and gas industry: amine desulfurization, dehydration flux filter, oil field water, completion fluid filtration.

* Car paint, painting industry: paint, electrophoretic paint, pre-treatment fluid, paint and paint raw materials and solvent filtration.

* Textile, printing and dyeing, paper making industry: spinning liquid, dyes, flux, water, additives, adhesives filter.

* Edible oils and soap industry: polishing purification of edible oil, soap raw materials and water filtration.

* Pharmaceutical industry: a variety of pharmaceutical intermediates, pharmaceutical raw materials, solvent filtration.

* The electronic and electroplating industry: a variety of plating solution and water filtration.

* Machining industry: a variety of cutting fluid, coolant and cleaning liquid filtration.

Q1: How do I know which micron rating to choose?
A: It depends on your downstream equipment sensitivity:
- RO membranes: Require ≤5 µm (often 1–5 µm absolute)
- Cooling towers: 25–100 µm is typical
- Food/beverage final rinse: 1–5 µm
- General process water: 25–50 µm
Rule of thumb: Select a micron rating ½ the size of the smallest orifice or sensitive component downstream.
Send us your application details-we'll recommend the optimal rating and bag type.

Q2: Can bag filters remove dissolved contaminants like chlorine or heavy metals?
A: No. Bag filters only remove suspended solids, not dissolved ions, gases, or organics. However, we offer activated carbon-filled filter bags that adsorb chlorine, taste, and odor compounds-combining particulate and chemical removal in one step. For dissolved metals or salts, pair with ion exchange or reverse osmosis.

Q3: How often do I need to change the filter bag?
A: It varies by water quality, but signs include:
- Differential pressure >15 psi
- Reduced flow rate
- Visible bag discoloration or bulging
In clean municipal water, a 25µm bag may last 3–6 months. In high-silt well water, it could be days.
We provide free bag life calculators based on your TSS (total suspended solids) data.