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Pear-Shaped Flask Centrifuge Tube

The Pear-Shaped Flask Centrifuge Tube is a heavy-duty, borosilicate 3.3 glass vessel designed for specialized centrifugation and sedimentation. Its unique tapered geometry is ideal for the efficient collection of small-volume precipitates, commonly used in the determination of water and sediment in petroleum products.

Technical Specifications

  • Material: Borosilicate Glass 3.3 – ASTM E-438 Type 1 (Class A)
  • Design: Pear-shaped with a conical base for maximum sample concentration
  • Compliance: Designed to comply with ASTM E-1403 (Type III) and ASTM D96 standards
  • Capacity: 100 ml
  • Joint Size: Precision ground neck (Standard 24/40 or as per variant)
  • Centrifugal Force: Rated for RCF up to 700 x g (depending on rotor compatibility)
  • Chemical Resistance: High resistance to halogens, organic solvents, and acids
  • Thermal Resistance: Superior thermal shock resistance for repeated lab use

Description

The Pear-Shaped Centrifuge Flask from Osmosis Scientific is a critical tool for analytical laboratories focusing on sedimentation, semi-micro distillation, and oil analysis. Engineered from premium Boro 3.3 glass, this flask is built to withstand both the mechanical stress of centrifugation and the chemical demands of aggressive solvents.

The pear-shaped design is specifically intended to facilitate the recovery of small amounts of solids or heavy liquid phases. By directing the sample into a narrow, tapered base, it allows for easy and precise decantation or pipetting. This makes it the industry standard for testing bottom sediment and water (BS&W) in crude oils and other petrochemical applications.

Each flask is produced with uniform wall thickness to ensure balanced rotation and minimize the risk of breakage under centrifugal force. The ground glass neck ensures a vapor-tight seal when used with matching stoppers, preserving sample integrity and preventing the escape of volatile components.

Specifically designed for petrochemical, pharmaceutical, and quality control laboratories, this centrifuge tube offers the reliability and durability required for high-accuracy results.

Pear-Shaped Flask Centrifuge Tube – Borosilicate 3.3 Glass, Graduated
Capacity (mL)SKUEnquiry
100PSCT-0100Enquire Now

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    Frequently Asked Questions (FAQs)

    What is the primary use of a Pear-Shaped Centrifuge Tube?
    These tubes are specifically designed for testing the water and sediment content in crude oil, fuel oils, and other petroleum products. The tapered “pear” bottom allows for the precise collection and measurement of small volumes of sediment or water that settle during centrifugation.
    What material is used for these tubes?

    To withstand the mechanical stresses of centrifugation and thermal changes during testing, these tubes are manufactured from High-quality Borosilicate 3.3 glass. This ensures:

    • Superior thermal shock resistance.
    • High chemical durability against solvents and hydrocarbons.
    • A long operational life in rigorous lab environments.
    Can these tubes be used at high speeds?
    These tubes are reinforced to withstand the centrifugal forces (RCF) required by standard ASTM oil testing methods. However, it is vital to ensure they are balanced correctly in the centrifuge to prevent breakage.
    Are these tubes manufactured by Osmosis Scientific?
    Products may be labeled as Manufactured by, Manufactured for, or Distributed by Osmosis Scientific. While we manufacture many items in-house, specialized calibrated items may be sourced from vetted third-party manufacturers to ensure they meet specific accreditation requirements.
    Do these tubes meet industry standards?
    Yes. Professional-grade pear-shaped centrifuge tubes are designed to comply with specific metrology and industry standards, such as ASTM D96, ASTM D1796, or ISO equivalents, ensuring consistency in testing protocols.

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