Dimensions & Technical Specifications of PAH-M10+2

The pressure vessel is a horizontal chamber which is designed, fabricated and tested according to the current edition of ASME Boiler & Pressure Vessel Code, Section VIII, Div. 1, ASME/PVHO-1, and its addenda. It has two compartments, main compartment (MC) and transfer compartment (TC). As the model type 10+2 symbolized, it has the capacity to accommodate ten (10) occupants in the MC and two (2) occupants in the TC. Most of the time, TC is for personnel locking in and out only.
There are four (4) 10” viewports installed on the chamber wall of MC for visual inspection or correspondence between chamber interior and outside, and another four (4) 4” viewports installed for camera monitoring. The same as MC, TC will be equipped with two (2) 10” viewports, one of which will be used for camera monitoring purpose. In addition, another six and two 4” viewports will be installed on the chamber top wall of MC and TC respectively for illumination purpose.

Besides the proprietary penetrators installed for pressure control, depth indication, fire suppression, and electrical cable etc., there are ten (10) and six (6) penetrators installed in MC and TC respectively, reserved for medical monitoring or other purpose. Its general specifications as follows:

Max. operating pressure : 6 ATA/73.5 psig
Internal diameter : 2500 mm (98.43”)
Overall Length : 7025 mm (276.57”)
Internal Length (MC) : 5647 mm (222.32”)
Internal Length (TC) : 1368 mm (53.86”)
Volume (MC) : 28.80M3 approx.
Volume (TC) : 3.55 M3 approx.
Weight (Empty) : 6446 kg/14181 lb. Approx.
Rectangular Entry Door (MC) : 750 mm x 1900 mm
29.53” x 79.80”
Circular Entry Door (MC) : 800 mm/31.50”
Circular Entry Door (TC) : 700 mm/27.56”
Seats (MC) : 10
Seats (TC) : 2
View Ports 10″ (MC) : 4 ea.
View Ports 4″ (MC) : 4 ea. For camera, 6 ea. For illumination
View Ports 10″ (TC) : 2 ea.
View Ports 4″ (TC) : 2 ea. For illumination
Medical Lock : one 8in. ID. Medical Lock installed in MC
Environment Control Unit : Yes
Fire Suppression System : Deluge & Handline Systems for MC & TC

The control panel is a control station which equipped with all control valves, depth gauges, gas pressure gauges, communication system, oxygen analyzer, power control panel, fire suppression system control panel, and CCTV monitors.

The control console consists of three compartments. The left compartment comprises FSS control panel, communication system, oxygen analyzer, gauges and remote control valves. The middle compartment comprises CCTV system and illumination control panel. The right compartment comprises depth gauges, pressure gauges, and remote control valves.

The breathing gas supply system is a device including pipe line, manifold, regulator, and control valves connected together to supply breathing gas for the occupants inside the chamber. There are 10 and 2 Built in Breathing Systems (BIBS) equipped with overboard dump system in the MC and TC respectively. The gas supply source comes either from hospital liquid oxygen system or compressed air system. In addition, a set of 12 high-pressure oxygen cylinders will be supplied as the backup breathing gas supply. During treatment, the normal breathing media for treatment is from oxygen system. Patients inside the chamber breathe oxygen via mask or hood. When air-break is needed, just taking off mask or hood and breathing the chamber air. When FSS (Fire Suppression System) activated, the fire control system will cut off the oxygen supply and transfer to air supply for mask or hood. In order to prevent O2 concentration of chamber air from exceeding dangerous level, an overboard-dumping system is equipped to lead the exhalation outside the chamber. As to the breathing-regulating module, it consists of inhalation demand valve, exhalation demand valve, a manually adjusting needle valve, and flow meter. With the breathing-regulating module, patients can breathe easily and smoothly.

The air compressor system comprises two sets of oil-free air compressors, one main air reservoir, one standby air reservoir, one pneumatic control air reservoir and related filtration, dryer devices and piping. The air stored in the reservoirs with the pressure level of 150 psig will be used for chamber pressurization, ventilation, pneumatic control and emergency changeover of breathing medium. The specification of compressor as follows:

75 HP Horizontal – Oil-free, Water Cooled
CFM 268 at 150 PSIG
Max Pressure = 150PSIG

Two compressors connected in parallel, one is running and another is on standby alternatively. The compressed air goes through a dryer, pre-filter, then into the air reservoir. Finally, the air will be purified through a purifier before entering the hyperbaric chamber. The quality of air produced by this compressor system complies with the requirements of NFPA 99, Chapter 20, 2002 edition.

The fire suppression system has two independent fire fighting systems, deluge and handline system. Both two systems have independent water tank filled with city water and pressurized with compressed air, ready for use in the event of fires. Deluge system consists of sufficient spray nozzles installed at the ceiling of MC and TC compartment interior. Two handlines are strategically installed in MC compartment and one handline is installed in TC compartment. When fire suppression system activated, the breathing gas will be changed from oxygen to air supply automatically.

The chamber environment control system includes an Environment Control Unit (ECU) located outside the chamber and a Fan Coil Unit (FCU) located inside the chamber. The EUC provides cool or hot water through a thermal isolated tubing to the FCU, in which the temperature and humidity of the chamber can be conditioned by circulating the air of chamber with an air-drived-motor fan.

The chamber illumination system offers 6 lights for MC and 2 lights for TC respectively. All of the lights are installed outside the chamber. The lighting fixtures are comprised of a 20 watts high-efficiency bulb and a ventilation fan which is used for heat dissipating.

The chamber communication system consists of one main communication unit located on the control console and two talkback speakers located in MC and TC respectively. This system provides two-way communications between occupants and operator. Besides, MC is equipped with an entertainment speaker, from which occupants can hear audio music. Both compartments and control console are equipped with additional sound-powered phone in case of the power failure of main communication system.

The CCTV monitor system consists of two TV monitors located on control console, four color cameras located on MC and two color cameras located on TC. This system provides chamber operator monitoring occupants without having to look through view port. The four cameras of MC are connected to a digital quad video processor, in which operator can select the desired image.
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