Product Overview
Engineered for demanding laboratory vacuum filtration and trace analysis, this PTFE (Polytetrafluoroethylene) Buchner Filter Funnel offers unmatched chemical inertness, thermal stability, and mechanical durability. Designed as a superior alternative to fragile glass and chemical-sensitive plastic funnels, it is the ideal choice for handling aggressive solvents, strong acids (including Aqua Regia and HF), concentrated alkalis, and high-purity samples without contamination risks.
Key Features & Benefits
-
Extreme Thermal Resistance (-196°C to +250°C):
Capable of continuous operation up to 250°C (482°F) and maintaining exceptional toughness and 5% elongation even in cryogenic environments down to -196°C (-320°F). Fully autoclavable for sterile applications.
-
Universal Chemical Inertness:
Virtually immune to chemical attack. Resists strong acids, concentrated bases, Aqua Regia, hydrofluoric acid (HF), organic solvents, and corrosive reagents.
-
Ultra-Low Friction & Non-Stick Surface:
Features an extremely low coefficient of friction and minimal surface tension. Prevents sample adhesion, minimizes fluid retention, and ensures 100% sample recovery and easy cleaning.
-
Superior Weathering & Aging Resistance:
Offers the longest aging lifespan among plastics, maintaining structural integrity, flexibility, and performance under long-term exposure to light, oxygen, and harsh environments.
-
Unbreakable & Durable Construction:
Solid virgin PTFE design eliminates the risk of breakage, cracking, or chipping common with glass funnels, ensuring lab safety and reducing replacement costs.
-
Detachable / Two-Piece Modular Design:
Easy to disassemble for thorough internal cleaning and complete removal of residue from the perforated filter plate.
Technical Specifications
| Specification Item | Value / Description |
| Material | 100% High-Purity Virgin PTFE (Teflon) |
| Operating Temperature | -196°C to +250°C (-320°F to +482°F) |
| Design Type | Buchner Filter Funnel / Straight Wall Funnel |
| Filter Plate | Perforated PTFE grid plate (Detachable / Modular) |
| Sterilization | Autoclavable (121°C Steam Sterilization compatible) |
| Surface Finish | Ultra-smooth, Hydrophobic, Non-wetting |
| Applications | Vacuum Filtration, Trace Metal Analysis, Chemical Synthesis, Pharmaceutical Quality Control |
Why Choose PTFE Over Glass and PP?
-
Safety First: Eliminates glass breakage hazards in high-pressure vacuum setups or cleanroom environments.
-
No Contamination: Hydrofluoric acid (HF) etches glass, introducing silica contamination into samples; PTFE remains 100% inert and unaffected.
-
Thermal Shock Immunity: Unlike glass, PTFE will not shatter due to sudden temperature changes during hot filtration processes.
Applications
-
Chemical Synthesis & Processing: Separation of organic and inorganic precipitates with aggressive solvents.
-
Environmental & Water Testing: Trace element analysis and airborne particle filtration.
-
Pharmaceutical & Biotech: Cleanroom filtering, reagent purification, and crystallization recovery.
-
Petrochemistry & New Energy: Battery electrolyte filtering and acid wash processing.
Usage & Maintenance Tips
-
Filter Paper Compatibility: Use with standard circular filter paper or membrane filters matching the inner diameter of the funnel bed.
-
Vacuum Setup: Connect the stem to a standard vacuum flask using a rubber adapter/stopper or tapered joint.
-
Cleaning: Wash with warm soapy water or clean with acid/solvent baths. Avoid abrasive tools to preserve the ultra-smooth surface finish.