Egis RadGuard X3

Radiation rooms need doors that do three things at once: block X-rays, seal air, and move a very heavy leaf reliably thousands of times a year. The RadGuard X3 is Egis' lead-lined hermetic sliding door, carrying up to 3 mm of lead equivalence in a 90 mm leaf, with the shielding overlapped at the frame so there is no radiation gap at the perimeter — the classic failure point of shielded doors. The leaf remains a true hermetic slider: down-and-in closing, full-perimeter gasket, EN 12207 Class 4 airtightness.

Weight is the engineering challenge. A lead-lined leaf is several times heavier than a standard hermetic leaf, so the X3 runs on a heavy-duty drive with an uprated carrier, reinforced track and soft start/stop control. Opening speed is tuned to 0.3–0.6 m/s: fast enough for clinical throughput, gentle enough that the seal seats without hammering the gasket or the shielding. Safety follows EN 16005 with radar, infrared presence detection and a soft bottom edge.

Egis sizes the lead equivalence to the room's shielding design — 1 to 3 mm Pb — and coordinates with the project's radiation safety officer and AERB-licensed physicist, because in India the shielding design of an X-ray or radiotherapy room follows AERB guidelines. Clear openings run 900 to 1800 mm wide and 2100 to 2500 mm high, covering diagnostic X-ray through interventional suites. The clinical face is powder-coated steel with a stainless option, flush and wipeable.

Lead must be continuous. A sheet of lead in the leaf means nothing if the frame junction leaks scatter radiation, so the X3's shielding is designed as a system: the lead lining wraps the leaf, and the frame carries overlapped shielding so the leaf-to-frame junction maintains the rated equivalence in the closed position. The down-and-in closing action matters here too — it pulls the leaf tight to the frame, closing the junction the same way every cycle.

The drive engineering is about mass control. The heavy-duty microprocessor drive ramps torque on start and brakes regeneratively on approach, so the leaf's kinetic energy never exceeds what the end stops and seals can absorb. An interlock output ties into the room's X-ray warning system: the exposure circuit can be wired so the tube cannot energise unless the door proves closed — a standard requirement in radiation safety design.