- Warranties cover parts and labor for one year
- Exceeds MIL-STD-285, NSA 94-106, NSA 65-6, and CID/09/12A requirements
- Control panel that allows safe semi- or fully-automatic operation for personnel, equipment, or emergency exit access
- Reliable, advanced pneumatic sliding door technology for EMI/RFI shielding systems
- Maintains 120 dB attenuation over a broad frequency range from 1 KHz to 18 GHz
- Low-maintenance, arc sprayed metal-to-metal sealing method that eliminates RF gaskets and contact fingers
- Flush threshold on door sill for easy equipment transport
The door’s advanced pneumatic logic system utilizes exclusive technology, allowing versatility for design implementations in compliance with warning, operational, and safety requirements.
The PSD Model is primarily designed for all-welded, RF shielded enclosures, secure facilities, or anechoic chambers. With its precision sliding operation, the door is ideal for high traffic environments, and areas where physical location does not allow space for a swing type door.
ConstructionInside view of PSD system
The all-welded PSD is constructed from low carbon, hot rolled structural steel. The door frame consists of structural tube steel machined for flatness, treated with a pure tin coating, and welded in place to provide the structural base for the pocket assembly. The door leaf features two thermal-bonded, tin-coated shielding skins which are mechanically attached to a leaf frame of aluminum or steel.
Bolt-on inspection/service panels, for door removal and pneumatic system access, are installed on the door pocket in areas that facilitate easy access for adjustments and/or repairs.
During pneumatic operation, rubber composite bladders inside the door frame are inflated, and the compression of the thermal-bonded, tin-coated surfaces creates a tight seal.
For smooth and responsive operation, an inspection cover plate for the overhead carriage track utilizes a pneumatic cable cylinder. Oversized doors are available to accommodate vehicles, aircraft, and large industrial equipment and are available in a full range of custom sizes.
The PSD provides ultra-high performance attenuation levels when tested in accordance with MIL-STD-285 and exceeds the performance of NSA 94-106, NSA 65-6, and CID/09/12A.
The PSD can be configured to maintain 120 dB attenuation over frequency ranges from 1 KHz to 18 GHz.
PSD - Pneumatic Sliding Door - Attenuation Levels
Magnetic Fields:20 dB @ 30 KHz rising to 90 dB @ 400 Hz and 120 dB 1KHz
Electric Fields: 120 dB from 1 KHz to 50 MHz
Plane Waves: 120 dB from 50 MHz to 1 GHz
Microwaves: 120 dB from 10 GHz to 18 GHz, decreasing to 100 dB @ 40 GHz
OperationClose-up view of the V grooved caster at threshold.
Semi-automatic operation is appropriate for low to medium traffic areas. The semi-automatic door is opened and closed manually with inset handles conveniently located on the interior and exterior skins, to help facilitate the opening and closing operation.
The RF sealing process is operated by a control valve or button mounted on a control panel, on both sides of the door. A fail-safe limit valve in the door pocket prevents the door from being inflated unless it is fully closed.
Fully Automatic Operation
Fully automatic operation is appropriate in high traffic personnel areas, main entrances, or access-controlled entrances, and is mandatory for oversized doors.
The door opening process can be controlled by a push button, rotary switch, floor mats, or infrared sensors. Pressure switches or other sensing devices may be used to activate the door closure. Upon activation, the internal bladder deflates and the door leaf immediately retracts to the fully opened position. Door closing, activated by the access device, is a reversal of the opening process.
Close-up of control panel module.
The PSD incorporates numerous safety features to assure compliance with local, state and federal safety requirements. Emergency override and dump valves are included to shut down the pneumatic system when activated. In the event of pneumatic system failure, the door is rendered operable only in a manual mode. An optional safety bumper may also be positioned on the leading edge of the door, which retracts the door if an object is encountered during closing.
The PSD can be integrated with various security systems, fire detection systems, and cipher locks. Integration with auto latching, locking hasps, and quick release opening mechanisms may be achieved. Auto ramps and a semi-flush or flush door sill may also be interfaced with this door system.