Class III Lead-Lined Glovebox Cabinet

What is the Class III Lead-Lined Glovebox Cabinet?

A Class III lead-lined glovebox cabinet adds radiation shielding to the gas-tight enclosure for handling radioactive materials. It provides containment and shielding in one sealed workspace. These cabinets are used in radiochemistry and nuclear medicine research.

Overview

This cabinet surrounds the working volume with lead or lead-equivalent shielding, typically 2–50 mm depending on the isotope, while retaining the gas-tight, negative-pressure construction of a Class III unit. The viewing panel is lead glass or lead-acrylic and the gloves are fitted with shielded cuffs. Interior pressure is 100–200 Pa below room, and supply and exhaust are double HEPA filtered, with exhaust monitoring for radioactivity. A double-door transfer port is used so the enclosure is never opened directly. Shielding is graded according to the isotope and activity, and the cabinet weight rises sharply with thickness, so floor loading and a rigid frame must be considered. The design is used in radiochemistry, nuclear medicine research and tracer studies requiring high containment.

How does it work?

A Class III cabinet is a sealed enclosure operated through long gauntlet gloves bonded to the front panel, so the operator never breaks the barrier. The interior is held at negative pressure of at least 100–200 Pa relative to the room, and all supply and exhaust air passes two HEPA filters, with the exhaust filter usually preceded by an incinerator or other treatment for the most hazardous agents. Because the enclosure is gas-tight, it is tested for leak tightness as well as airflow. Materials enter and leave through double-door pass-throughs, a dunk tank or a steriliser so the seal is never opened directly. A double HEPA exhaust protects against filter failure, and the exhausted air is monitored. Internal lighting, glove ports and a transfer hatch are standard. The design removes operator exposure risk but requires careful procedures for glove changes, pass-through cycles and decontamination.

What are the key features?

• Lead or lead-equivalent graded shielding
• Lead glass or lead-acrylic viewing panel
• Shielded glove cuffs on glove ports
• Negative pressure with double HEPA exhaust
• Exhaust radioactivity monitoring
• Double-door transfer port

What are the technical specifications?

A typical class iii lead-lined glovebox cabinet configuration offers cabinet class of Class III, lead-lined, shielding thickness of 2–50 mm lead equivalent, negative pressure of 100–200 Pa below room, exhaust filtration of Double HEPA H14, viewing panel of Lead glass or lead-acrylic and glove ports of 2–4 with shielded cuffs. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Class III Lead-Lined Glovebox Cabinet is used in radiochemistry and tracer work, nuclear medicine research, radioactive aerosol handling and radionuclide sample preparation. Across the wider Class III Cabinets class, laboratories also deploy it for risk Group 4 pathogen work, highly pathogenic virus culture and aerosol challenge and animal studies.

Which standards and certifications apply?

Relevant standards and methods include EN 12469 (biosafety cabinets), NSF/ANSI 49 (biosafety cabinetry), ISO 10648-2 (glovebox leak tightness), ISO 14644-1 (cleanroom classification), EU GMP Annex 1 (sterile manufacturing) and GB 19489 (biosafety laboratory requirements). Certification candidates for this model are CE and ISO 9001 manufacturing; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Verify leak tightness and airflow at installation and at least annually, since a gas-tight cabinet depends on intact gaskets, glove seals and weld integrity. Follow a defined glove inspection and replacement schedule, checking for pinholes before each session and replacing at the first sign of wear. Do not open the enclosure to the room; use pass-throughs and decontamination cycles for all material movement. Confirm the exhaust fan is dedicated and interlocked, with alarms for loss of negative pressure. Provide a written decontamination procedure using a validated agent, and record every cycle. Confirm the room pressure relationship and make-up air so that the cabinet does not disturb the surrounding laboratory. Train operators on emergency procedures, including power or exhaust failure.

How do I select the right Class III Lead-Lined Glovebox Cabinet?

Choose lead lining when radioactive material must be handled inside a gas-tight enclosure. Confirm the shielding thickness for the isotope and floor loading for the heavier frame. RFQ: isotope and activity, required shielding, glove layout, exhaust monitoring and frame load.

How does it compare with other Class III Cabinets variants?

Class III cabinets are chosen when a risk assessment identifies Risk Group 4 agents or operations that must be completely isolated from the operator and the environment. Select the glove system and number of glove ports for the manual tasks, and the pass-through arrangement, such as a double-door hatch, dunk tank or connected autoclave. Confirm the negative pressure setpoint, the double HEPA exhaust and any required exhaust treatment such as incineration. Check that the room has the exhaust and make-up air capacity, and that the cabinet can be leak tested to ISO 10648-2 or the applicable standard. Decide whether atmosphere control is needed for anaerobic work, and whether lead shielding is required for radionuclide use. Plan decontamination and glove replacement procedures before installation.