DKF-M
Pharma&Biotech
Depth Filters
Cellulose
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For Serum & Bioprocess Clarification
The DKF-M Series Pure Cellulose Depth Stack Filter Module is constructed
from high-purity cellulose with an internal three-dimensional structure
that ensures excellent filtration efficiency and high dirt-holding capacity.
Its high purity and low precipitation properties make it ideal for clarifying
serum and serum-containing media.
• Clarification and Filtration of Blood Products
• Prefiltration of Serum and Antibody Solutions
• Filtration of Serum-Containing Culture Media
• Clarification and Filtration of Peptide APIs
Excellent Filtration Performance
Unique 3D structure ensures superior filtration and dirt holding capacity;High porosity design enables high flow rates and extended service life
High Product Purity
Manufactured from high-purity cellulose materials;Low extractables prevent process fluid contamination
Broad Process Compatibility
Withstands temperatures up to 80°C for various process conditions; Suitable for serum, media, blood products, and other bio-fluids
Reliable Process Consistency
Medical-grade production control, compliant with ISO 13485;Compliant with USP <88> Class VI Plastic Biocompatibility Requirements: Compliant with USP<87> with no potential cytotoxicity
FILTER MATERIALS | Cellulose |
CORE & SUPPORT & DIVERSION LAYER | PP |
O-RINGS/GASKET | Silicone/EPDM/Viton |
MAX. OPERATING TEMPERATURE | <80 ℃ |
MAX. DIFFERENTIAL PRESSURE | 2.5 bar (23 ℃) 1.0 bar (80 ℃) |
ENDOTOXIN | <0.25 EU/ml |
BIOCOMPATIBILITY | Compliant with USP <88> Class VI Plastic Biocompatibility Requirements Compliant with USP<87> with no potential cytotoxicity |
SERIES | MATERIAL | RATING(μm) | END CAP | OD(in) | LAYER | SEAL |
DKF-M | Cellulose | 0.2-0.4μm | DOE/Flat | 8'' | 8 | Silicone |
0.5-0.8um | 12'' | 12 | EPDM | |||
1.0-3.0μm | 16'' | 15 | Viton | |||
3.0-6.0μm | 16 | |||||
6.0-15μm |
What is a pure cellulose depth stack filter mainly used for?
A pure cellulose depth stack filter is mainly used for clarification and prefiltration of serum, blood products, culture media, peptide solutions, and other sensitive bioprocess fluids. Its high-porosity depth structure provides effective particle retention and high dirt-holding capacity while helping maintain stable flow during biological and pharmaceutical processing.
Why is pure cellulose suitable for serum and bioprocess clarification?
Pure cellulose media provides a clean depth-filtration structure with low extractables and good compatibility with sensitive biological fluids. The three-dimensional porous matrix captures contaminants throughout the media rather than only on the surface, helping clarify serum-containing solutions and other process fluids while reducing the risk of premature filter blockage.
How do I choose the right filtration rating for the DKF-M depth stack filter?
Selection should be based on feed turbidity, particle size distribution, solids loading, required filtrate clarity, flow rate, viscosity, and downstream filtration requirements. DKF-M grades cover a range from fine clarification to coarser prefiltration. The correct grade should provide sufficient contaminant removal while maintaining practical flow and differential pressure.
Is the DKF-M filter suitable for serum-containing and protein-related process fluids?
Yes, DKF-M is designed for clarification of serum-containing media, blood products, peptide solutions, and other biological process fluids. However, final suitability should be confirmed according to product composition, protein concentration, required recovery, filtration objective, temperature, and downstream process requirements.
What are the operating limits of the DKF-M depth stack filter?
The listed maximum operating temperature is below 80°C. Maximum differential pressure is 2.5 bar at 23°C and 1.0 bar at 80°C. Actual operating conditions should also consider the selected filter grade, seal material, fluid viscosity, process configuration, and required filtration performance.
When should a DKF-M depth stack filter be replaced?
Replacement should be based on filtration performance rather than a fixed operating time. Typical indicators include increasing differential pressure, reduced flow rate, longer batch processing time, or deterioration in filtrate clarity. Actual service life depends on solids loading, feed composition, viscosity, selected filter grade, flow conditions, and the required final product quality.