Bag Filter Housing RFQ Checklist: Flow Rate, Pressure, Material, Bag Size

Why Bag Filter Housing RFQ Details Matter

A bag filter housing quotation can slow down when the request only says "bag filter housing" without flow rate, pressure, liquid, material, connection, or bag size information. The housing is not only a shell for the filter bag. It also needs to match the process line, installation space, sealing method, basket, and maintenance approach.

For a new project or replacement housing RFQ, the most useful information is practical: flow rate, operating pressure, temperature, liquid, housing material, bag size, number of bags, inlet and outlet connection, gasket or seal details, quantity, and photos or drawings if available.

This guide explains what buyers can prepare before requesting a bag filter housing quote. It is not a pressure vessel design rule, a chemical compatibility chart, or a final material selection guarantee. Final review should be based on the actual liquid, pressure, temperature, site layout, and project requirements.

Quick RFQ Checklist Before Requesting A Housing Quote

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

• Required flow rate or expected processing volume.
• Operating pressure and design pressure if known.
• Working temperature.
• Liquid name or process description.
• Viscosity and solids information if available.
• Housing material, such as SS304, SS316, carbon steel, PP, or another specified material.
• Bag size, such as size 1, size 2, size 3, size 4, or custom size.
• Single-bag or multi-bag housing requirement.
• Inlet and outlet connection type and size.
• Sealing or gasket material if specified.
• Cover opening type or maintenance preference.
• Installation direction, space limit, or pipe layout.
• Quantity.
• Whether the request is for a new project or replacement of an existing housing.
• Photos, drawings, nameplate, old model, or previous purchase specification.

If some details are unknown, say which information is missing. Clear unknowns are better than guessed values, because guessed specifications can lead to a housing that does not fit the process line or cannot be reviewed properly.

To request a bag filter housing quotation, please share the flow rate, pressure, temperature, liquid, material, bag size, connection type, quantity, and any drawings or photos.

Flow Rate And Number Of Bags

Flow rate is one of the first items a supplier needs to understand. It helps determine whether the buyer is asking for a single-bag housing, multi-bag housing, or another liquid filtration arrangement.

Useful flow information includes:

• Flow rate per hour or per minute.
• Batch or continuous operation.
• Whether the flow rate is normal, maximum, or estimated.
• Whether the current housing has enough capacity or needs an upgrade.
• Whether the liquid is water-like, oily, viscous, or contains higher solids loading.

Single-Bag Housing

A single-bag housing is often reviewed for smaller lines, replacement projects, test systems, or applications where one bag is enough for the requested flow and loading. For an RFQ, buyers should still share the bag size, pressure, connection, liquid, and installation details.

Multi-Bag Housing

A multi-bag housing is usually reviewed when the required flow or loading is higher. Buyers should provide the target flow rate, number of bags if known, bag size, connection requirements, and available installation space. If there is an old housing, include photos of the housing body, cover, inlet, outlet, basket, and nameplate.

Pressure, Temperature, And Liquid Conditions

Pressure and temperature affect housing review, connection selection, sealing details, and material discussion. Buyers should avoid sending only a product photo when the process conditions are important.

Useful information includes:

• Normal operating pressure.
• Maximum pressure or design pressure if known.
• Operating temperature.
• Liquid name or process description.
• Whether the liquid is water-like, oily, viscous, sticky, abrasive, or chemical.
• Whether the system has pressure fluctuation or frequent start-stop conditions.
• Whether the current housing leaks, clogs, or is difficult to maintain.

This information helps the supplier review the request more carefully, but it does not replace engineering confirmation for pressure, chemical, or regulated applications.

Housing Material Information

Bag filter housings may use different materials depending on liquid, temperature, pressure, corrosion condition, budget range, and project requirement. Buyers often mention a material name, but the working conditions still need to be reviewed.

Common Material Names Buyers May Send

Examples of material information that can help an RFQ:

• SS304 housing if it was previously used or specified.
• SS316 housing if the project documents request it.
• Carbon steel housing if the existing line uses carbon steel or the project specifies it.
• PP or plastic housing if the buyer is reviewing a plastic liquid filtration line.
• Any special surface, gasket, or contact-material requirement from the project documents.

Chemical Or Regulated Liquid Caution

This guide does not confirm chemical compatibility, food-grade compliance, or suitability for regulated processes. If the liquid is chemical, corrosive, high temperature, food, beverage, pharmaceutical, or otherwise regulated, the buyer should send the liquid name, concentration if available, temperature, pressure, and project documentation requirements for separate review.

Bag Size, Basket, And Support Details

The housing must match the filter bag and support basket. If the buyer already uses a standard bag size, include that size in the RFQ. If the buyer is replacing an old housing, photos and measurements can help identify the bag and basket arrangement.

Useful bag and basket details include:

• Bag size, such as size 1, size 2, size 3, size 4, or custom size.
• Bag diameter and length if measured manually.
• Basket diameter, basket length, and basket top detail if available.
• Ring or collar type for the filter bag.
• Whether the system uses a standard bag, filter sock, or custom liquid filter bag.
• Photos of the old bag, basket, support plate, and sealing area.

If the bag details are not clear, buyers can also review the liquid filter bag RFQ guide before sending replacement details.

Connection Type And Installation Layout

Connection details help avoid misunderstanding between the housing and the existing pipeline. The same housing capacity can still require different connection arrangements depending on the site.

Useful connection information includes:

• Inlet and outlet size.
• Flange, threaded, clamp, sanitary, or other connection type if known.
• Connection standard if specified by project documents.
• Top entry, side entry, bottom outlet, or other layout information.
• Pipeline direction and installation space.
• Whether the housing must replace an existing unit without changing the pipeline.

Photos of the existing pipeline and old housing connection can reduce back-and-forth, especially for replacement projects.

Seal, Gasket, Cover, And Maintenance Details

Sealing and cover opening details matter because they affect operation, maintenance, and replacement work. Buyers should share any required gasket material or cover style if it is already specified.

Useful details include:

• Gasket or O-ring material if known.
• Cover opening type, such as clamp, swing bolt, quick opening, or another specified design.
• Basket support and hold-down requirement if known.
• Drain, vent, pressure gauge, or accessory requirement if specified.
• Maintenance access and available lifting space.
• Whether operators need faster bag replacement or easier cleaning access.

These details should be reviewed against the actual system. Do not assume one cover or seal style fits every liquid filtration process.

Photos, Drawings, And Existing Housing Information

Photos and drawings are especially useful when the buyer is replacing an old housing or does not know the exact model.

Useful files and photos include:

• Overall photo of the old housing.
• Nameplate or label if available.
• Inlet and outlet connection close-up.
• Cover and clamp/bolt area.
• Basket and sealing area.
• Old filter bag and ring/top style.
• Installation space and nearby pipeline.
• Existing drawing, old purchase record, or project specification.

Photos cannot replace pressure, temperature, material, or flow information, but they can help identify missing details and reduce quotation ambiguity.

FAQ

What Information Is Needed For A Bag Filter Housing RFQ?

A useful RFQ usually includes flow rate, operating pressure, temperature, liquid, housing material, bag size, number of bags, inlet and outlet connection, gasket or seal details, quantity, and photos or drawings if available. If some information is unknown, mark it as unknown instead of guessing.

How Do I Choose Single-Bag Or Multi-Bag Housing?

Start with the flow rate, solids loading, bag size, maintenance method, and available installation space. A single-bag housing may be reviewed for smaller flows or simpler replacement needs. A multi-bag housing may be reviewed when the required flow or loading is higher. Final review depends on the actual process conditions.

Which Housing Material Should I Specify?

Specify the material already used, required by project documents, or requested by the process. Common names include SS304, SS316, carbon steel, and PP or plastic housing. Material selection depends on the liquid, temperature, pressure, chemical condition, and project requirement, so the working conditions should be sent with the RFQ.

What Connection Details Should Be Included?

Include inlet and outlet size, connection type, connection standard if known, and pipeline layout. Common connection descriptions may include flange, threaded, clamp, or sanitary connection when the buyer already knows the requirement. For replacement projects, photos of the old housing connection can help the review.

Can I Request A Custom Bag Filter Housing?

Custom housing requests can be reviewed when the buyer provides clear flow, pressure, temperature, liquid, material, bag size, connection, quantity, and drawings or photos. The supplier should confirm feasibility based on the exact request and working conditions.

Requesting A Bag Filter Housing Quotation

A clear housing RFQ should help the supplier understand the process line, housing size, material, connection, bag fit, and maintenance requirement before review.

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

• Flow rate.
• Operating pressure and design pressure if known.
• Temperature.
• Liquid and working conditions.
• Housing material.
• Bag size and number of bags.
• Connection type and size.
• Gasket, cover, basket, and accessory requirements if specified.
• Quantity.
• Photos, drawings, nameplate, or old housing details if available.

If the housing request connects with bags, cartridges, cages, or air filters, buyers can compare related filtration RFQ checklists in the RFQ guide hub.

For related liquid filtration equipment, buyers can review bag filter housing and broader liquid filtration products. For quotation support, contact SFFILTECH for quotation support.