Products Description

Phenolic resin bonded depth filter cartridges are manufactured by impregnating a fibrous media (acrylic, polyester or blended fibers) with phenolic resin and curing it into a solid, porous block. The result is a robust, self-supporting cartridge that resists compression, retains captured solids under changing pressure, and exploits full media depth for maximum dirt-holding.

Technical parameters

Media	Fibrous substrate (acrylic / polyester / blend) fully impregnated with phenolic resin
Construction	Coreless, cured resin-bonded depth matrix - grooved or smooth exterior available
Nominal micron ratings (examples)	1, 2, 3, 5, 10, 25, 50, 75, 100 µm
Outside diameter	65 mm
Inside diameter	28 mm
Common lengths	247.65 - 1016 mm(other lengths available)
Sealing options	Buna-N (NBR), EPDM, Silicone, Viton (FKM), PTFE-encapsulated Viton (o-rings only)
Liquid temperature capability	Up to ~250°F (121°C) for short-length designs; check part-specific limits for longer lengths.
Max differential pressure	Product-specific; typical variants rated up to ~70–90 psid (≈4.8–6.2 bar).
Recommended changeout ΔP	Commonly in the 30–40 psid (≈2.0–2.8 bar) range - adjust per process requirements.

Key features

✅ Phenolic resin rigid bonding structure
✅ Progressive gradient density design
✅ Metal-free core construction
✅ Chemically resistant material
✅ Grooved surface treatment

Product Types


Acrylic Fiber With Phenolic Resin-bonded (Brown)	Cellulose Fiber With Melamine Resin-bonded (White)	Polyester Fiber With Phenolic Resin-bonded (Dark Brown)

Applications

Phenolic resin bonded depth filter cartridges are suited to industrial processes where throughput and solids loading are significant:

Paints, coatings, varnishes and printing inks
Adhesives, sealants, resins and emulsions
Solvent-based process streams and chemical intermediates
Lubricating oils, hydraulic fluids and gear oils
Metalworking fluids and machine coolants
Petrochemical intermediates and refinery process streams
General industrial process waters with high suspended solids

Installation, operation & maintenance

1. Installation Checklist

Verify correct length, OD/ID and end-cap type for your housing.
Inspect O-rings and sealing surfaces; replace if damaged.
Note flow direction if element is asymmetric (depth gradients are directional).
Start system slowly to avoid pressure shocks.

2. Operational Tips

Monitor differential pressure across the filter; record initial clean ΔP and track rise.
Replace cartridges when ΔP approaches the recommended changeout point or when effluent quality degrades.
For viscous fluids, allow gradual ramp-up of flow to prevent trapped air and surging.

3. Cleaning & Reuse

Phenolic resin bonded depth filter cartridges are depth, non-washable elements. Attempting to backflush or wash often does not restore original efficiency and can release trapped particles. Replace elements when spent.