GF Glass Fiber Capsule Filter

Filter media / membrane

Ultrafine glass fibre depth media with a three-dimensional pore network that tightens through the thickness; particles are held across the whole depth instead of piling on the surface, so dirt-holding capacity far exceeds a membrane of the same rating — especially with viscous feeds and colloids

Support & drainage layers

Polypropylene support and drainage layers; the glass fibre is retained between polypropylene mesh so fibres cannot shift or shed at high flux

Body material

One-piece polypropylene shell and end caps, thermally welded throughout with no adhesives; no metal parts in the wetted path

Seals / O-rings

The body is thermally welded and has no main O-ring; port gaskets in silicone or EPDM, with FKM available for aggressive fluids

Micron rating

0.5, 1.0, 2.0, 3.0, 5.0, 10, 20 µm nominal; usually installed to protect a downstream sterilising-grade filter

Effective filtration area

About 0.5–0.7 m² per 10" media section; small capsules run about 0.02–0.2 m². With depth media, service life is set by dirt-holding capacity rather than area

Inlet / outlet connections

Inlet/outlet 1/4"–1-1/2" with hose barb, sanitary tri-clamp, threaded and quick-connect options; the connections are moulded into the same polypropylene body

Hold-up volume

Small (≈0.02 m²) ≈30 mL; mid (≈0.1 m²) ≈90 mL; 10" class (≈0.7 m²) ≈250 mL. Most of the hold-up is recoverable by blowing down through the open drain

Vent & drain

One polypropylene vent valve on top and one drain valve underneath, both hand-operated; the vent can take a hydrophobic membrane cap to keep the sterile boundary intact

Max operating temperature

Continuous service to 60 °C; withstands 121 °C saturated steam for sterilisation cycles

Max forward differential pressure

Forward 4.0 bar (58 psi) @ 25 °C; 1.0 bar (15 psi) @ 60 °C; reverse 2.0 bar (29 psi) @ 25 °C

Recommended change-out ΔP

A single-use capsule cannot be backwashed or regenerated. Depth media climbs in ΔP gradually rather than spiking, so change out at 1.5 bar (22 psi) or when flow has fallen to half the initial value

Sterilisation

Autoclave at 121 °C for 30 min, up to 3 cumulative cycles recommended; steam-in-place, EtO and gamma sterilisation are also available

Wetting & flushing

Glass fibre is hydrophilic and wets out with aqueous feeds directly; purge the air through the vent before start-up. When used as a prefilter, change it together with the final filter so a breakthrough upstream never dumps its load on the final stage

Extractables & cleanliness

Flushed with purified water to conductivity and TOC limits before shipment; extractables, endotoxin (< 0.25 EU/mL) and TOC batch data available on request

Integrity test

Nominally rated depth media, so bubble-point integrity testing does not apply; flow, ΔP and fibre shedding are sampled batch by batch

Packaging

Individually double-bagged, assembled and sealed in a cleanroom; gamma pre-sterilised units available

Regulatory & validation

Wetted materials meet USP Class VI biological reactivity and 21 CFR 177 food-contact requirements; material certificates and batch test reports can be supplied with the shipment

Note: actual compatibility and service life depend on chemical concentration, temperature, flow, differential pressure, upstream contamination load and housing design. Validate under your real process conditions.

Values shown are typical for this product class; actual supply specification follows the quotation and sample datasheet.