Custom Quartz Fritted Discs

Parameter	Typical Range
Pore grade	P0 (coarse) through P6 (ultra-fine) — general porosity classification
Pore size range	>250 µm (P0) down to <1.6 µm (P6)
Diameter	10–150 mm
Thickness	2–8 mm
Edge	Loose disc or pre-welded into a housing

Inquiry

Sintered quartz filter discs selected by pore grade — the pore rating is what actually determines whether a disc works for your process, not disc size alone.

Pore grade, flow rate, and pressure drop move together — a finer pore grade filters more but restricts flow more, so the right grade depends on both what you're filtering out and how much flow your process needs.

Available Quartz Fritted Discs Forms

Discs are supplied loose (for you to weld or mount into your own housing) or pre-welded into a quartz tube or funnel body. Tell us which you need — a loose disc's edge finish differs from one being fused into an assembly.

Pore Grade Selection for Filtration and Gas Diffusion

Pore grade is chosen by what needs to pass through and what needs to be stopped — coarse grades (P0–P1) suit gas diffusion and coarse particulate filtration where flow rate matters most; fine grades (P4–P6) suit fine particulate filtration or applications needing a consistent, small bubble size in gas diffusion. If you have a target flow rate or a particle size that must be retained, share it and we'll confirm the grade that fits.

Quartz Fritted Discs Functional Standard & Manufacturing Limit

The table above covers what's repeatable without added lead time. Flow and pressure-drop data for a given grade depend on disc thickness and diameter as well as pore size — where we have measured data for a specific grade/thickness combination, we'll share it; otherwise it's confirmed through testing on your specific configuration.

P0160–250 µm

P1100–160 µm

P240–90 µm

P316–40 µm

P410–16 µm

P51–1.6 µm

Porous Element

Diameter, Thickness and Pore Grade Must Be Quoted Together

Controlled Feature	Reference Capability / Requirement
Diameter	Ø10–200 mm common quotation range
Thickness	Selected with diameter, support and pressure differential
Porosity Grade	P0–P5 reference classification aligned to ISO 4793 ranges
Pore Range	Controlled within the selected grade rather than as one exact pore diameter
Effective Area	Porous working diameter separated from the outer sealing edge
Edge	Plain, ground or prepared for welding into an assembly
Material	High-purity quartz frit material
Common Grades	P1–P4 are common commercial quotation grades; availability confirmed per order

Pore Classification

P0–P5 Reference Ranges

Grade	Reference Pore Range	Selection Direction
P0	160–250 µm	Coarse distribution / support
P1	100–160 µm	Coarse filtration or gas dispersion
P2	40–90 µm	Medium filtration
P3	16–40 µm	Fine filtration or dispersion
P4	10–16 µm	Fine porous element
P5	1–1.6 µm	Very fine reference grade

Available Forms

Configurations Defined by the Process

Plain DiscFull circular porous element

Reduced Active AreaPorous center with solid sealing edge

Annular DiscCentral opening around a porous ring

Weld-In DiscEdge prepared for integration into quartzware

Applications

Filtration, Support and Gas Diffusion

Liquid FiltrationPore grade selected from particle retention and flow

Gas DispersionDisc area and grade selected for bubble distribution

Porous SupportFlat quartz support under a sample or membrane

Custom AssembliesFrit integrated into a tube, vessel or reactor

Need a fritted disc with a controlled porous area?Send diameter, thickness, P-grade, effective area, edge condition and assembly or flow requirement.

Open the Product Configurator

Engineering Data