Custom Quartz Fritted Plates

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)
L×W	Up to 200 × 200 mm
Thickness	3–10 mm
Frame / edge	Framed (welded into a border) or bare porous plate

Inquiry

Sintered quartz filter plates for larger-area filtration or gas diffusion than a round disc covers — selected by pore grade and effective filtration area.

Pore grade and effective filtration area determine flow together — a larger plate at a coarse grade moves far more volume than a small plate at a fine grade, so match plate size to your actual flow requirement, not just to the footprint available.

Porosity Grade and Effective Filtration Area

Effective filtration area is the porous region only — if the plate is framed, the frame itself isn't part of the active area, so specify the porous area you need, not the outer plate dimensions. Grade selection follows the same logic as our Fritted Discs: coarse for flow-priority applications, fine for particle retention or consistent gas diffusion.

Quartz Fritted Plates Functional Standard & Manufacturing Limit

The table above is what's repeatable without added lead time. Flatness across a large fritted plate is harder to hold than on a small one — a plate at the largest L×W range should be confirmed for flatness if it needs to seal against a housing on installation.

Quartz Fritted Plate Forms and Porous Areas

Plates are sintered to size, then either left bare or welded into a frame or housing wall. Before shipment we check outer dimensions, thickness, porous area boundary, flatness, pore grade consistency, and weld condition (framed units).

50 × 50 mmReference Minimum

200 × 200 mmReference Maximum

P0–P5Pore Grades

40–90 µmP2 Range

16–40 µmP3 Range

10–16 µmP4 Range

Large Porous Area

Plate Flatness and Effective Porous Area Are Separate Requirements

Controlled Feature	Reference Capability / Requirement
Length × Width	50 × 50 to 200 × 200 mm common square reference range
Shape	Square, rectangular, annular or custom outline
Thickness	Selected with span, support and differential pressure
Porosity Grade	P0–P5 reference classification aligned to ISO 4793 ranges
Effective Area	Working porous zone dimensioned independently from the outline
Flatness	Specified where the plate seats or distributes flow
Edge	Plain, ground or prepared for frame integration
Material	High-purity quartz frit material

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

Square PlateFlat porous element for distributed flow

Rectangular PlateLonger porous zone matched to process width

Annular PlatePorous ring around a central opening

Framed PlatePorous area integrated into a solid quartz perimeter

Applications

Large-Area Filtration and Gas Distribution

Process FiltrationLarge porous working area selected by grade and flow

Gas DistributionFlat diffuser under a tank or reactor zone

Vacuum SupportPorous support surface with a defined sealing edge

Custom EquipmentPlate outline and mounting frame matched to the apparatus

Need a fritted plate matched to a process area?Send outline, thickness, P-grade, effective porous zone, support pattern and pressure or flow condition.

Open the Product Configurator

Engineering Data