Liquid Filter Bag RFQ Guide: Micron, Ring Type, Material, Size

Why Complete RFQ Details Matter for Liquid Filter Bags

Liquid filter bags are often simple to install, but a quotation can slow down when the request only says "filter bag" or includes one unclear photo. A supplier usually needs a few basic details before checking size, material, micron rating, ring type, and fit with the existing housing.

For a new or replacement liquid filter bag RFQ, the most useful information is practical: bag size, micron rating, material, ring or collar type, quantity, liquid, temperature, and working conditions. If some information is missing, photos of the old bag, label, housing, basket, and sealing area can still help the review.

This guide explains what buyers can prepare before requesting a quote. Buyers can also review related liquid filtration products for the broader product path. It is not a chemical compatibility chart or a performance selection rule. Final review should be based on the actual liquid, process conditions, and project requirements.

Quick RFQ Checklist Before Requesting a Quote

Before sending an inquiry, prepare as many of these details as possible:

• Bag size or full dimensions.
• Micron rating or target particle size if known.
• Material, such as polypropylene, polyester, nylon mesh, or another specified media.
• Ring, collar, or top style.
• Quantity.
• Liquid or application.
• Working temperature if known.
• Viscosity or flow rate if already available.
• Existing housing model, housing type, basket size, or old bag sample.
• Whether the request is for replacement bags or a new installation.
• Photos of the old bag, top ring, bottom, seam, label, and housing opening.
• Any drawing, old part number, or previous supplier specification.

If you do not have all details, say which information is unknown. Clear unknowns are better than guessed values, because guessed specifications can lead to a bag that does not fit the housing or is not suitable for review.

To request a liquid filter bag quotation, please share the bag size, micron rating, material, ring type, quantity, liquid, temperature, and working conditions.

Bag Size And Housing Fit

Bag size is usually the first item to confirm. Some buyers know a standard bag size, while others only have an old sample or housing basket. Either approach can help if the information is clear.

What To Measure

Useful size details include:

• Bag diameter or mouth diameter.
• Bag length.
• Ring or collar outside diameter if visible.
• Basket or housing opening size.
• Existing bag size code if marked.
• Whether the bag is used in a single-bag or multi-bag housing.

If the old bag has been stretched, clogged, cut, or deformed, it may not measure exactly like a new bag. In that case, photos of the housing basket and sealing position can help the supplier understand the fit.

What To Send If The Old Bag Is Not Available

If there is no old sample, send the bag filter housing information instead:

For housing-focused quotation preparation, review these bag filter housing RFQ details.

• Housing brand or model if known.
• Basket dimensions.
• Housing inlet and outlet arrangement if relevant.
• Photos of the basket and top sealing area.
• Any previous purchase record or drawing.

The goal is not to guess the bag from one photo. The goal is to give enough information for a practical supplier review.

Micron Rating And Filtration Target

Micron rating describes the particle size target or retention level requested by the buyer. It is one of the most important RFQ fields, but it should be treated carefully.

When asking for a quote, share the micron rating already used, required by the process, or requested by the project. If you do not know the micron rating, explain the liquid, solids, process purpose, and whether the current bag clogs quickly or allows unwanted particles through.

A finer rating may not always be the right direction for every process. It can affect flow, loading, replacement frequency, and housing performance. Supplier review should consider the actual liquid and operating conditions.

Common Material Information To Prepare

Liquid filter bags may use different materials depending on the liquid, temperature, particle type, and project requirement. Buyers often mention common materials such as polypropylene, polyester, nylon mesh, or other specified media for liquid filter bags and filter socks.

Common Material Names Buyers May Already Know

Examples of material information that can help an RFQ:

• Polypropylene filter bag, if PP was previously used or specified.
• Polyester filter bag, if polyester was previously used or specified.
• Nylon mesh filter bag, if washable or mesh-style filtration is requested.
• Felt, mesh, or other construction type if already known.
• Any special requirement provided by the project documents.

This guide does not confirm chemical compatibility. If the liquid is chemical, high temperature, viscous, oily, abrasive, sticky, or regulated, share the liquid name and working conditions for review. Do not rely on a general material name alone.

Ring, Collar, And Top Style Details

The top of the liquid filter bag must match the housing and basket sealing area. A bag may have the right material and micron rating but still be unusable if the ring or collar does not fit.

Common information to prepare:

• Plastic ring, metal ring, sewn ring, drawstring, or other top style if known.
• Ring diameter and shape if visible.
• Whether the bag seals on a basket, flange, or housing lip.
• Photos of the old bag mouth and housing opening.
• Any label or old specification that mentions ring type.

Details That Help Avoid Ring Or Top Mismatch

Send close photos of:

• The bag mouth.
• The ring or collar edge.
• The sealing position inside the housing.
• The basket top.
• Any gasket, snap band, handle, or special top detail if present.

If the ring style is unknown, do not force a guess. Mark it as unknown and provide photos.

Liquid And Working Conditions

The liquid and working conditions help the supplier understand the application before quotation review. This does not mean the supplier can confirm every outcome from a short message, but it gives the review a safer starting point.

Helpful information includes:

• Liquid name or process description.
• Temperature.
• Viscosity if known.
• Flow rate if already available.
• Solid type if known.
• Whether the liquid is water-like, oily, viscous, sticky, abrasive, or contains coarse particles.
• Whether filtration is batch or continuous.
• Whether the current bag clogs too quickly, tears, bypasses, or does not seal well.
• Quantity and replacement frequency if known.

For chemical, food, beverage, or other regulated applications, the buyer should provide project requirements and required documentation separately. Do not assume a material or bag style is suitable for all regulated uses.

Photos, Samples, And Drawings

Photos can reduce back-and-forth, especially when the buyer does not know the exact bag size or ring type.

Useful photos:

• Old unused bag if available.
• Used bag before disposal.
• Bag mouth and ring/collar.
• Bottom and side seam.
• Label or package marking.
• Housing basket.
• Housing top sealing area.
• Any damaged, clogged, or deformed area.

Photos cannot replace key specifications, but they can help identify what information is missing. If a drawing or old purchase record exists, include it with the RFQ.

FAQ

What Information Is Needed For A Liquid Filter Bag RFQ?

A useful RFQ usually includes bag size, micron rating, material, ring or collar type, quantity, liquid, temperature, and working conditions. If some details are unknown, photos of the old bag, housing basket, sealing area, label, or drawing can help the supplier review the request.

How Do I Choose Micron Rating?

Start with the micron rating already used, required by the process, or specified in project documents. If the rating is unknown, describe the liquid, solids, filtration purpose, and current problem. A supplier can review the request more carefully when the application details are clear, but the final choice should not be based on micron number alone.

Which Materials Are Commonly Used?

Common material names buyers may mention include polypropylene, polyester, nylon mesh, and other specified media. The right material depends on the liquid, temperature, solids, operating conditions, and project requirements. For chemical or regulated applications, provide the liquid and documentation requirements for separate review.

What Ring Type Should I Specify?

Specify the ring, collar, or top style already used in your housing if you know it. If not, send clear photos of the old bag mouth, ring edge, basket, and housing sealing area. The top style matters because the bag must fit and seal with the existing housing.

Can I Request A Custom Liquid Filter Bag Size?

Custom sizes may be reviewed when the buyer provides clear dimensions, drawings, samples, or housing details. Share the bag diameter, length, ring/top style, material, micron rating, quantity, and photos if available. The supplier should confirm feasibility based on the exact request.

Requesting A Liquid Filter Bag Quotation

A clear RFQ does not need to be complicated. It should help the supplier understand the bag, the housing, and the working conditions before review.

When you request a liquid filter bag quotation, please share:

• Bag size or dimensions.
• Micron rating.
• Material.
• Ring or collar type.
• Quantity.
• Liquid and temperature.
• Viscosity or flow rate if known.
• Existing housing, basket, or replacement sample information.
• Photos, drawing, sample details, or old label if available.

If some details are missing, mark them as unknown and send photos. This usually makes the review more practical than guessing.

For related quotation-preparation pages, buyers can see all filtration RFQ guides before comparing bag, housing, cartridge, cage, or air filter details.

For quotation help, contact SFFILTECH for quotation support.