Shutdown Ventilation

Large-scale plant shutdowns generate dozens of simultaneous ventilation requirements — confined space purging, vessel inerting recovery, and continuous fresh air across open process areas. AJV Tech supplies Ramfan ATEX/IECEx certified explosion proof fans for shutdown ventilation, including the EFi75xx (0.75hp, ~490 m³/hr) for confined space entries and the EFi120xx/EFi150xx (1.2–1.5hp, ~900–1,100 m³/hr) for larger process areas and vessels. All fans are rated Zone 1, gas group IIB, and available from UAE stock.

Key Features

✓Ramfan EFi75xx — 0.75hp, ~490 m³/hr, Zone 1 IECEx/ATEX for confined space purging
✓Ramfan EFi120xx/EFi150xx — 1.2–1.5hp, ~900–1,100 m³/hr for large vessels and process areas
✓Gas group IIB (T4) certified — covers hydrogen sulphide and common refinery gases
✓Anti-static ducting compatible for explosive atmosphere purging and inerting recovery

Frequently Asked Questions

Refinery and petrochemical shutdowns require explosion proof ventilation for multiple purposes: general area ventilation of enclosed process spaces, confined space purging before vessel entry, and continuous fresh air supply during work inside classified areas. Ramfan explosion proof fans in multiple capacities are deployed across the shutdown site, with larger diameter fans for general area ventilation and smaller portable units for confined space entry operations. AJV Tech supplies complete Ramfan shutdown ventilation packages.

The number of fans deployed during a large refinery turnaround depends on the number of simultaneous confined space entries, the size of the spaces being worked, and the general ventilation requirements of the shutdown area. Large turnarounds at GCC refineries may require 10-30 or more explosion proof fans across multiple work fronts. AJV Tech can assist with estimating quantities based on your turnaround scope and provide packages sized for your project.

Explosion proof blowers typically operate on single or three phase supply at 230V or 400V, depending on the blower model and capacity. During a plant shutdown, power is drawn from temporary distribution boards or the facility supply, with explosion proof plugs and sockets used for connections in classified areas. AJV Tech can advise on the power supply requirements for your specific Ramfan selection and shutdown configuration.

Yes. AJV Tech is an authorised Ramfan distributor in the UAE and GCC, maintaining stock of Ramfan explosion proof blowers and fans with full IECEx and ATEX certification documentation. Products are available from UAE stock for rapid deployment to shutdown projects across UAE, Saudi Arabia, Qatar, Oman, Kuwait, and Bahrain. Documentation packages meet the submittal requirements for ADNOC, Saudi Aramco, and QatarEnergy projects.

Yes. AJV Tech specialises in combined shutdown packages that include Atexor portable explosion proof lighting systems and Ramfan explosion proof ventilation fans in a single coordinated supply. Combined packages simplify procurement, reduce the number of suppliers to manage, and ensure all equipment is certified and documented to the same standard. Contact our team with your shutdown scope and dates for a package quotation.