A-One Engg. Works

GL45 PBT Safety Caps features:
Closed System Design
Reduce chemical evaporation and exposure to hazardous vapors with CFDPLAS solvent reservoir caps. 
Combine with secure fluid connections and CFDPLAS air inlet or relief valves to maintain pressure equilibrium within the bottle.
Multiple port configurations.
PTFE construction.
Enclose harmful or toxic vapors.
With HDPE,PP or PBT cap rings.
1/4-28 Port Threads
Designed to accept industry-standard 1/4-28 threaded fittings. 
For use with semi-rigid tubing equal to or less than 1/8"(3.2mm) outside diameter. 
Ports are angled 10° for more accessible tubing connections.
Available in1-ported,2-ported,3-ported,4-ported PTFE insert.

HPLC Safety Bottle Caps, particularly those with a GL4 thread, are designed to safely handle solvents and mobile phases in HPLC (High-Performance Liquid Chromatography) systems. They prevent hazardous vapor release into the lab, protect solvents from contamination, and ensure a stable mobile phase composition. Here's a more detailed breakdown of their applications and features:Key Applications:

• Solvent Extraction:These caps allow for the safe extraction of solvents or mobile phases from bottles or reservoirs. 
• Vapor Containment:They prevent the release of harmful solvent vapors into the laboratory environment, enhancing safety. 
• Contamination Prevention:The caps often incorporate filters to prevent dust and particles from entering the solvent, ensuring the purity of the mobile phase. 
• Stable Mobile Phase:By preventing vapor loss and contamination, these caps help maintain a consistent and stable mobile phase composition for accurate HPLC analysis. 
• Reduced Evaporation:They minimize solvent evaporation, which can lead to changes in concentration and affect analysis results. 
• Improved Safety:The primary application is to increase safety in laboratories handling solvents, protecting lab personnel and the environment. 
• Specialized Fittings:Some caps come with various connections (ports) for different tubing sizes and types, allowing for customized setups. 

Common Features:

• Venting Valves:These valves allow air to enter the bottle as solvent is removed, preventing a vacuum from forming and enabling smooth flow. 
• PTFE Filters:Filters made of PTFE (Polytetrafluoroethylene) are often used to remove particulates from the incoming air, preventing contamination. 
• Freely Rotating Cap Body:This feature allows tubes to rotate freely without twisting when exchanging solvent bottles, preventing damage to the tubing. 
• Chemical Resistance:The caps are designed to withstand the corrosive effects of various solvents and mobile phases. 
• Pressure Tolerance:They are built to withstand the pressures encountered in HPLC systems. 
• Shut-off Valves:Some caps include shut-off valves, allowing for easy removal or exchange of reservoirs without spills. 
• Different Models:They are available in various models, including those with different numbers of ports to accommodate diverse setups. 

Choosing the Right Cap:

• Thread Size:GL45 is a common thread size for HPLC bottles, but other sizes like GL32, GL38, and GL80 are also used. 

Material: Stainless Steel / PTFE Name: Replenishment Bottle Cap Subject: Mathematics Design and Style: Ergonomic, Extended Feeding Cap Usage and Purpose: Laboratory Feeding, Fermentation Tank Feeding Performance and Property: Durable, Corrosion-Resistant Parts and Accessories: Includes Extended Feeding Cap