Product Overview

This two-part polypropylene Büchner funnel represents a significant advancement in laboratory filtration equipment. Designed with precision engineering, it features interlocking components that create an effective vacuum seal without requiring additional lubricants or greasing agents.

Key Specifications

• Material: High-quality polypropylene construction
• Stem length: 85mm (3.3 inches)
• Inner diameter: 20mm stem, 130mm funnel
• Total length: 210mm when assembled
• Compatible with 11-12.5cm filter papers

Filtration Efficiency & Design Excellence

The perforated filter plate design ensures optimal liquid flow while maintaining solid retention capabilities. Laboratory testing demonstrates superior separation efficiency compared to traditional single-piece alternatives. The straight-sided construction eliminates dead zones where particles might accumulate, ensuring complete sample recovery and consistent results across multiple filtrations.

Material Quality & Durability Assessment

Polypropylene construction offers exceptional chemical resistance across a broad pH range, making this funnel suitable for acidic, basic, and organic solvent applications. The material maintains structural integrity under vacuum conditions up to 29 inches of mercury, demonstrating reliability for demanding laboratory procedures. Thermal stability testing confirms operation between -10°C to 80°C without degradation.

Vacuum Seal Technology Comparison

The interlocking mechanism creates a superior seal compared to traditional threaded or friction-fit designs. Independent testing shows 98% vacuum retention efficiency, significantly outperforming competitors requiring additional sealing compounds. This grease-free operation eliminates contamination risks and reduces maintenance requirements, particularly important for analytical applications requiring pristine conditions.

Advantages

• No greasing required for vacuum seal
• Chemical-resistant polypropylene material
• Easy disassembly for thorough cleaning
• Compatible with standard filter papers
• Precise dimensional specifications

Considerations

• Filter papers sold separately
• Requires compatible Büchner flask
• Initial paper moistening necessary
• Limited to specified paper sizes

What filter paper sizes are compatible?

This funnel works optimally with 11-12.5cm diameter filter papers. Using papers outside this range may compromise seal integrity and filtration efficiency.

Is greasing required for the vacuum seal?

No greasing is necessary. The precision-machined interlocking surfaces create an effective vacuum seal, eliminating contamination risks associated with lubricants.

What additional equipment is needed?

A Büchner flask, vacuum source, and appropriate connecting hardware are required. Model CH0422C01 flask is specifically recommended for optimal compatibility.

“After six months of daily use in our analytical laboratory, this Büchner funnel has exceeded expectations. The grease-free seal eliminates our previous contamination issues, and the polypropylene construction shows no signs of degradation despite exposure to various solvents.

Setup is straightforward – the two-part design locks together perfectly every time. We’ve processed hundreds of samples without a single seal failure. The 130mm diameter accommodates our standard 12.5cm papers perfectly, and cleanup is remarkably simple since no residual grease needs removal.

Compared to our previous glass funnels, this unit offers superior durability and chemical compatibility. The investment has paid for itself through reduced replacement costs and improved workflow efficiency. For laboratories requiring reliable, contamination-free filtration, this represents exceptional value. Highly recommended for both routine and critical applications where precision matters.”