How to Select a Liquid Filter Bag

Review liquid type, temperature, material compatibility, micron rating, bag size, ring style, housing fit, and quantity before requesting a liquid filter bag quote.


Liquid filter bag selection flowchart
Flowchart showing the main specification steps for choosing a liquid filter bag before requesting a quote.

Filter Bag Selection Flow
Liquid & solidsTemperatureCompatibilityMicron ratingBag sizeRing typeQuantity / RFQ
Use this sequence to prepare specifications before sending an RFQ.
Original selection flowchart for technical reference. This technical illustration is for selection support only.
Filter housing system reference for checking liquid filter bag compatibility.
Filter housing reference image used to show why bag size and housing compatibility should be confirmed before quotation.

Short Intro

Selecting a liquid filter bag is not only a matter of choosing a micron rating. The correct filter bag depends on the liquid, solids, operating temperature, chemical exposure, flow rate, housing design, sealing style, and filtration goal.

This guide explains the main factors to review before requesting a filter bag quote. If you already have specifications, photos, or an existing sample, you can send them through Go2Filter for RFQ review:

Request a liquid filter bag quote

Step 1: Identify the Liquid and Solids

Start by describing what the filter bag needs to remove.

Useful questions include:

  • What liquid is being filtered?
  • What solids or contaminants are present?
  • Are the solids hard, soft, sticky, fibrous, or gelatinous?
  • Is the filtration batch or continuous?
  • Is the goal clarification, pre-filtration, product recovery, or equipment protection?

The more specific the application information, the easier it is to review the filter bag material and micron rating.

Step 2: Review Operating Temperature

Operating temperature affects material selection. A filter bag that performs in a room-temperature process may not be suitable for a heated liquid stream.

When requesting a quote, provide:

  • Normal operating temperature
  • Maximum temperature
  • Whether temperature spikes occur
  • Cleaning or washdown temperature if relevant

Do not assume a material is suitable based only on product name. Temperature, liquid chemistry, and exposure time should be reviewed together.

Step 3: Check Chemical Compatibility

Material compatibility is one of the most important selection factors. Polypropylene, polyester, and nylon mesh each behave differently under chemical exposure.

Information to provide:

  • Liquid name or chemistry
  • pH range if known
  • Solvent, oil, acid, alkali, or additive exposure
  • Batch time or continuous exposure
  • Cleaning chemicals if used

Compatibility should be reviewed before use, especially for chemical processing, regulated applications, high-temperature liquids, or aggressive fluids.

Step 4: Choose the Micron Rating

The micron rating should match the filtration goal. A finer micron rating may capture smaller particles but can increase pressure drop or reduce service life if solids loading is high.

Consider:

  • Particle size
  • Desired clarity
  • Downstream equipment protection
  • Solids concentration
  • Flow rate
  • Acceptable pressure drop
  • Previous filter performance

If you do not know the exact micron rating, describe the problem you are trying to solve and provide any current filter information.

Related Go2Filter page:

Liquid Filter Bags

Step 5: Confirm Filter Bag Size

Filter bags must fit the housing and support basket. Common bag sizes are often referred to by numbers such as size #1 or size #2, but dimensions should still be confirmed.

Useful details:

  • Bag diameter
  • Bag length
  • Existing size number if known
  • Housing model
  • Basket dimensions
  • Photos of existing bag and housing

Do not rely only on size labels. Some housings or applications may require specific ring or collar designs.

Step 6: Confirm Ring Type or Collar Style

The top seal affects whether the bag seats correctly in the housing.

Common quote details:

  • Plastic ring or metal ring
  • Sewn ring or molded collar
  • Handle style if required
  • Existing seal shape
  • Photos of the top opening and ring

A filter bag that is the correct length but wrong ring type may not seal properly.

Step 7: Match the Bag to the Housing

Housing compatibility matters because the bag must fit the basket, seal at the top, and handle the process conditions.

Provide:

  • Housing type
  • Single-bag or multi-bag housing
  • Connection size
  • Flow rate
  • Operating pressure
  • Basket condition
  • Current filter bag sample or drawing

If the housing is unknown, send photos of the housing nameplate, basket, lid, and existing bag.

Step 8: Estimate Quantity and Changeout Frequency

Quantity is needed for quotation and planning. Changeout frequency can also help evaluate whether the current micron rating or material is suitable.

Share:

  • Initial quantity required
  • Expected reorder quantity
  • Current service life
  • Whether bags blind quickly or tear
  • Whether solids loading changes by batch

Common Specifications to Prepare

Specification Why It Matters
Material Affects compatibility, temperature range, and filtration behavior
Micron rating Affects particle capture and pressure drop
Bag size Must fit housing and basket
Ring/collar type Determines sealing and fit
Quantity Needed for quotation
Application Helps review suitability
Temperature Affects material choice
Flow/pressure Helps evaluate housing and bag performance
Current model/photos Reduces risk of fit mismatch

Application Examples

Liquid filter bags may be considered for:

  • Industrial process water
  • Chemical processing
  • Paints, coatings, and resins
  • Food and beverage processing, subject to material and compliance review
  • Metalworking fluids
  • Pre-filtration before cartridges or membranes
  • Batch filtration where bag changeout is acceptable

Application examples are not guarantees of suitability. Actual operating conditions should always be reviewed.

RFQ Checklist

Before requesting a quote, prepare:

  • Product category: liquid filter bag
  • Size or dimensions
  • Material or preferred media
  • Micron rating
  • Ring or collar type
  • Quantity
  • Application or industry
  • Liquid type
  • Operating temperature
  • Flow rate and pressure if known
  • Current sample, part number, drawing, or photos

Send specifications:

Ask Go2Filter for filtration support

FAQ

What if I do not know the material?

Provide the liquid type, temperature, application, and existing sample information. Material selection can then be reviewed based on the available details.

Should I choose the finest micron rating possible?

Not always. A very fine micron rating may increase pressure drop or shorten service life if solids loading is high. Choose based on the filtration goal and process conditions.

Can photos help with a quote?

Yes. Photos of the existing bag, ring, housing, basket, and nameplate can help confirm size and fit.

Is a filter bag always better than a cartridge?

No. Filter bags and cartridges serve different needs. Bags are often useful for higher solids loading and simple changeout, while cartridges may offer different surface area, construction, or filtration characteristics.

Can I request a quote without a drawing?

Yes. A drawing is helpful but not always required. Provide dimensions, material, micron rating, quantity, application, and photos if available.

Request a Quote on Go2Filter

For pricing, availability, shipping, and lead time, send your size, material, micron rating, quantity, and application details for review.

Send Your Filter Bag Specifications

Explore Liquid Filter Bag RFQ Options on Go2Filter

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