Custom Quartz Fritted Rods

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	4–20 mm
Length	20–300 mm
Connection	Fused to a feed tube, or plain end for your own fitting

Inquiry

Sintered porous quartz rods for gas diffusion or immersed filtration — where a rod shape fits the vessel geometry better than a flat disc or plate.

Quartz Fritted Rods for Filtration and Gas Diffusion

A fritted rod is porous quartz shaped as a cylinder rather than a disc — used for gas sparging (bubbling gas through a liquid via a diffuser rod) or immersed filtration where a rod reaches into a vessel more conveniently than a flat frit at the bottom.

Available Quartz Fritted Rods Forms

Rods are supplied plain (for your own end fitting) or pre-fused to a feed tube for direct connection to a gas or fluid line. Tell us which you need — a plain rod's end finish differs from one prepared for fusion welding.

Quartz Frit Rod Sizes and Porosity

Pore grade selection follows the same logic as our other fritted products: coarser grades pass more gas volume with larger bubbles, finer grades produce smaller, more uniform bubbles at higher flow resistance. Diameter and length are chosen based on your vessel depth and the diffusion area needed — a longer rod at a given pore grade diffuses gas over more depth. Fabrication is sintered rod stock cut to length, connected to a feed tube by fusion welding where specified. Before shipment we check diameter, length, pore grade consistency, end condition, and weld point (where fused to a tube).

Ø6–20 mmDiameter Range

100–500 mmLength Range

P0–P5Pore Grades

40–90 µmP2 Range

16–40 µmP3 Range

1–1.6 µmP5 Range

Porous Cylinder

Rod Diameter, Active Length and Pore Grade Define the Flow Path

Controlled Feature	Reference Capability / Requirement
Diameter	Ø6–20 mm common quotation range
Length	100–500 mm common quotation range
Porosity Grade	P0–P5 reference classification aligned to ISO 4793 ranges
Active Length	Porous section separated from any solid connection end
End	Plain, ground-joint, threaded adapter or welded tube end
Flow Direction	Radial or axial flow stated for assembly review
Material	High-purity quartz frit material
Integration	Stem, joint or vessel interface defined with the rod

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 Fritted RodPorous cylindrical element with finished ends

Stemmed RodSolid quartz stem joined to the porous section

Jointed RodGround connection for laboratory apparatus

Welded DiffuserRod integrated into a tube or vessel assembly

Applications

Gas Dispersion and Depth Filtration

Gas SpargingPorous cylindrical surface for distributed gas release

Depth FiltrationLong flow path selected around particle loading

Reactor DiffusionRod integrated into a vessel or gas line

Custom ApparatusConnection end matched to the installed joint

Need a fritted rod with a specific active length?Send diameter, overall and porous length, P-grade, flow direction and end or joint configuration.

Open the Product Configurator

Engineering Data