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Deward type Semiautomatic Medical Gas Manifold
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Description
DEWARD-Type Semi-Automatic Manifold indoor use only.
- Complies with NFPA99 standard.
- Complies with ASTM B819 code (oxygen-clean).
- Initial cylinder bank switchover is automatic via pressure differential and manual selector lever designating primary and secondary banks for work cycles; subsequent switches are manual.
- Deward cylinder evaporators must function properly during high oxygen demand to prevent manifold freezing caused by inefficient liquid evaporation.
- If Deward evaporators are insufficient, an external vaporizer with sufficient consumption capacity must be implemented.
- Operation and maintenance personnel must be certified for safe equipment handling.
- The quality and purity level of medical gases, as well as the condition of the containers and their connections, is always the supplier’s responsibility.
- Do not use oil or derivatives.
Specifications
🧱 Mounting Plate
- Indoor use only.
- Made from galvanized carbon steel sheet, 18 gauge, with electrostatic paint finish.
- Made from stainless steel sheet, 18 gauge.
⚙️ Control System
- Operated via PCB electronic system with high-brightness LED visual indicators for manifold operation status.
- Check valves to control pressure differential between cylinder banks.
- 4–20 mA high-pressure transducers for primary and secondary banks.
📊 Visual Indicators
- Shows statuses: IN USE – READY – EMPTY for each cylinder bank (primary and secondary).
🚨 Alarm Signals
- Located on relay output port to indicate bank changeover.
🔁 Bypass System
- Two final line regulators for low pressure
- Manual isolation via stainless steel ball valves
- Configuration: one active, one on standby
🔒 Overpressure and Venting System
- Interconnected relief valve circuit
- Venting directed outside the cabinet
🆘 Emergency Inlets
- DISS CGA V-5 fitting, matched to system’s medical gas
- Located upstream of final regulators; low-pressure only (50–55 PSI)
📈 Pressure Gauges
- Analog type, for high and low pressure stages
🔗 Communication Systems
- 1 relay connection port for alarm signal output and link to master signal panel for bank change notification.
🌬️ Flow Delivery
- Standard flow: 65 SCF/min
- For higher flow rates, consult the manufacturer
🧱 Cylinder Headers – Minimum Cylinder Pressure and Operating Pressure
- Modular assembly design
- Made of special red brass extruded tube, SPS alloy 23000, H58 Drawn temper
- Compliant with ASTM B-43-98 and ASTM B-819 (oxygen-clean)
- Operating pressure: 3,000 PSI
- Minimum DEWARD cylinder pressure: 230 PSI
- Brass CGA check valves with automatic shutoff
- Manual master valve for open/close control on primary and secondary banks
- Natural brass finish (user or installer may coat or paint as desired)
🔗 Cylinder Pigtails
- Oxygen: Flexible copper tube, CGA 540 connection
- Other non-corrosive gases: Flexible PTFE hose with stainless steel mesh covering and safety line, CGA connection specific to each gas
🧪 Gas Compatibility
System available exclusively for high-pressure gas cylinders, compatible with:| Medical Gas | State | CGA Connection |
|---|---|---|
| Medical Oxygen | Gaseous with Deward cylinder evaporator | CGA 540 |
| Nitrogen | Gaseous with Deward cylinder evaporator | CGA 580 |
⚡ Electrical Requirements
- Power: 100–220 V, 50–60 Hz
🔌 Network Wire Type
- Recommended wire: Belden STP (shielded twisted pair)
- Models: #8461ZH or #8208
⚠️ Conditions Affecting Operation
Avoid the following to ensure proper equipment function:- Voltage fluctuations in power supply
- Use of emergency power plants as primary source
- Intermittent or unstable electrical supply
- Frequent outages followed by repeated emergency generator activation
🛠️ Installation Recommendations
- Verify proper physical grounding of equipment
- Install electrical backup system (No-Break) to avoid interruptions
- Add surge suppressors to protect against power spikes and voltage fluctuations
📘 Installation, Operation and Maintenance Manual
This manual is protected and available exclusively for equipment of our brand. To request it, the user must send an email with the required data using the form found in the manuals and after-sales service section.Brochure
Downlaod:No Available
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