Large Double-Door Explosion-Proof Refrigerator

What is the Large Double-Door Explosion-Proof Refrigerator?

A large 1000–1600 L explosion-proof refrigerator with two doors for bulk flammable liquids and sample retention in production and pilot-plant laboratories. It provides certified cold storage at high capacity for hazardous areas, where frequent access and large stock are expected.

Overview

This variant scales the explosion-proof design to 1000–1600 L, with two independent doors and a bank of adjustable shelves in each section. Larger certified compressors and sealed evaporators keep 2–8 °C when the doors are opened frequently, which is common in pilot plants and quality-control sample rooms. Interior surfaces are stainless steel or solvent-resistant coated steel with anti-static properties. The cabinet has a reinforced base, levelling feet and a defined grounding point. Display and alarm circuits are explosion-protected, and a remote signal can be routed out of the classified area. Weight can exceed 300 kg, so floor loading and delivery access need planning. The cabinet should carry a nameplate stating the marking, the certificate number and the ambient range.

How does it work?

Standard refrigerators contain sparking components, such as thermostats, door switches, light bulbs and fan motors, that can ignite vapours from flammable liquids stored inside. Flammable-storage refrigerators relocate or seal these parts outside the storage compartment, preventing an internal ignition. Fully explosion-proof refrigerators go further, using flameproof, increased-safety or encapsulated protection for every electrical component according to IEC 60079 or GB 3836, so neither the interior nor the exterior can ignite a surrounding explosive atmosphere. The cooling process itself is conventional vapour compression, but the compressor, controller and wiring are built to certified standards. Labels show gas group, temperature class and protection level, which must match the site classification.

What are the key features?

• Capacity of 1000–1600 L with two independent doors
• Certified compressors and sealed evaporators for high-traffic use
• Stainless or coated interior with anti-static properties
• Explosion-protected display and alarm circuits
• Reinforced base with levelling feet and grounding point

What are the technical specifications?

A typical large double-door explosion-proof refrigerator configuration offers temperature range of 2–8 °C, net volume of 1000–1600 L, doors of 2 independent, lockable, protection type of Ex db eb mb (model-dependent), gas group and class of IIB T4 and equipment protection level of Gb. 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 Large Double-Door Explosion-Proof Refrigerator is used in pilot-plant sample storage, bulk solvent cold storage, quality control retention samples and chemical production laboratories. Across the wider Explosion-Proof Refrigerators class, laboratories also deploy it for flammable solvent storage, hazardous area laboratories and reactive reagent cold storage.

Which standards and certifications apply?

Relevant standards and methods include IEC 60079-0, IEC 60079-1, IEC 60079-17, GB 3836.1, NFPA 45, NFPA 30, ATEX Directive 2014/34/EU and IEC 61010-2-011. Certification candidates for this model are CE, ISO 9001 manufacturing, ATEX 2014/34/EU and IECEx; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Install on a level, load-bearing floor with ventilation clearance, and ground the cabinet as instructed. Keep containers sealed and labelled, use secondary containment, and respect quantity limits from fire codes. Do not add unapproved electrical devices inside. Inspect regularly and record findings, including gasket condition and alarm function. Certified units must be serviced by trained personnel using approved parts, and changes can invalidate the certification. Calibrate temperature displays at least annually, and plan for power-failure response because stored solvents and reagents may be temperature-sensitive.

How do I select the right Large Double-Door Explosion-Proof Refrigerator?

Choose the double-door model when high capacity and frequent access in a classified area justify a larger certified cabinet. Specify volume, doors, area classification, gas group, temperature class, three-phase supply and floor loading. Compare with two smaller units, which add redundancy if one fails and ease servicing planning.

How does it compare with other Explosion-Proof Refrigerators variants?

Start with the hazard. If containers are sealed, quantities are small and the room is not a classified zone, a flammable-storage refrigerator may be adequate. If the area is classified Zone 1 or Zone 2, or large volumes are stored, specify a certified explosion-proof model with the right gas group and temperature class. Decide on capacity, upright or undercounter format, whether sub-zero storage is needed, and the alarm and signalling arrangement. Check the certificate against the area classification, confirm power supply and floor loading, and involve your safety officer. Never convert or modify a standard unit.