These answers cover common questions about selecting metal filter media and elements, evaluating operating conditions, and preparing a custom filter inquiry. Product suitability depends on the complete process and element design; the answers below do not replace an application review.
Filter media and selection
What types of filtration products does Filtalloy offer?
Our range includes metal filter elements, woven wire mesh, knitted wire mesh, and perforated metal filters, sheets and tubes. These are different product families: for example, a perforated support is not necessarily the fine filtration layer. Start with the product family that matches the medium, particle load and required element geometry.
How do sintered wire mesh and sintered metal fiber felt differ?
Sintered wire mesh uses bonded layers of woven mesh; layer arrangement, wire size and weave determine its structure. Sintered metal fiber felt uses a porous web of bonded metal fibers and can be combined with a support mesh. Neither medium has one universal pressure drop, filtration rating or temperature limit. Compare the specified grade and element design under your actual flow, particle loading and cleaning conditions. See the sintered mesh filter elements page for that separate product family.
What information is needed to select a filtration rating?
State the particle-size distribution, required downstream cleanliness or emission target, operating flow and fluid properties. Also identify whether a quoted rating is nominal or absolute and which test method supports it. A micron number alone cannot establish capture efficiency or service life; the media, seals and complete element must be evaluated together.
How should I choose a metal alloy?
Provide the gas or liquid composition, continuous and peak temperatures, contaminants, moisture, cleaning chemicals and any corrosion history. Material choice depends on the full exposure, including condensates and welds, rather than a generic temperature label. Confirm availability and the required grade for the proposed element; do not assume that every alloy listed for a medium is suitable for your process.
Operation and retrofit
Can sintered metal fiber felt be used for biomass flue gas filtration?
It may be a candidate for a defined biomass combustion flue-gas duty after review of temperature profiles, ash loading, gas composition, cleaning and corrosion risk. Water or acid condensation can create deposits and damage equipment, including during start-up and shutdown. Biomass gasification gas may also contain condensable tar and requires a separate assessment. Do not substitute a sintered mesh rating or a single material temperature for the complete hot-gas element design.
Can metal filter elements directly replace fabric bags in an existing baghouse?
Not without a retrofit check. Review the available filter area, housing and tube-sheet dimensions, seals, support and cleaning system, fan capacity, pressure differential, thermal expansion and the required emissions performance. An element that fits the opening may still alter flow distribution or cleaning behavior. A trial element and operating data can help evaluate a proposed conversion.
How do I assess pressure drop and cleaning requirements?
Record clean-element and loaded pressure differential at known flow and temperature, then track the trend against the cleaning cycle. Rising differential pressure can reflect dust loading, condensate or ineffective cleaning, while a sudden drop can indicate leakage or damage. Specify whether the process uses pulse cleaning, backwashing or offline cleaning; confirm that the chosen method is suitable for the medium and assembled element. Our engineering calculators can support preliminary sizing, but measured operating data and the final design take priority.
Can one filter element be used for both liquid and hot-gas filtration?
Do not assume interchangeability from the metal material alone. Gas and liquid duties have different viscosity, wetting, particle-loading, sealing and cleaning conditions. Evaluate the pore structure, support, welds, gaskets, pressure differential and operating temperature for the specific duty before specifying an element.
Custom elements and procurement
Can you make an element to an existing drawing or sample?
Send a drawing or sample with dimensions, tolerances, connection and seal details, flow direction, media specification and expected operating conditions. We can review the geometry and manufacturing approach, then agree on material, inspection points and any prototype or fit check before production. Changes to a legacy element should be evaluated against the original housing and process requirements.
What should I include in a technical inquiry?
Include the process fluid or gas composition, flow rate and units, continuous and peak temperature, operating and maximum differential pressure, particle characteristics, required filtration outcome, cleaning method, element quantity and drawings or photographs. For a retrofit, add housing dimensions, current element details and the problem observed in service. You can contact our engineers with these details for a focused review.
How are lead time and quality checks confirmed?
Lead time depends on material availability, geometry, quantity and the inspections agreed for the order. Ask for a schedule based on the final specification rather than assuming a standard delivery period. Define the required dimensional checks and any material or performance documentation before production so acceptance criteria are clear to both sides.
