DIVING EQUIPMENTS
Containerized Air Decompression Chamber with Diving Mix Gas Panel (TPI Approved)
J. K. Subsea Engineering Pvt. Ltd. is a trusted air decompression chamber manufacturer and supplier, building the Containerized Air Decompression Chamber with Diving Mix Gas Panel, Model No. JK-ADC-MGP-TPI, for commercial diving operations that go beyond straight air diving and need nitrox or heliox gas support. Housed inside a DNV 2.7-1 certified offshore container, this TPI approved mixed gas decompression chamber combines a 60 inch twin lock chamber, a dedicated chamber control panel, and a configurable diving mix gas panel, giving diving contractors a complete system built for deeper, longer duration commercial diving work.
What is a Diving Mix Gas Panel and Why Does It Matter?
A diving mix gas panel supplies divers with a blended breathing gas, either nitrox (nitrogen and oxygen) or heliox (helium and oxygen), instead of straight compressed air. As diving depth increases, breathing plain air raises the risk of nitrogen narcosis and extends decompression time. Switching to a mixed gas, with the exact ratio determined by a Life Support Technician (LST), lets divers work at greater depths more safely and often reduces the decompression time needed once they return to the chamber. This containerized mixed gas decompression chamber pairs that mix gas panel with a 60 inch twin lock chamber built to ASME Section VIII Division 1 (2025) and ASME PVHO-1 (2023), designed in compliance with IMCA D018 for diving plant testing and IMCA D037 specifically for surface oriented mixed gas diving systems. Being TPI approved, the chamber shell is built to DNV TPI approved drawings and carries a DNV stamped nameplate, confirming independent third party verification of the build.
Key Features of the Mixed Gas Decompression Chamber System
- TPI Approved Chamber Shell: 60 inch twin lock chamber shell built to ASME Sec VIII Div. 1 (2025) and PVHO-1 (2023), constructed to DNV TPI approved drawings with a DNV stamped nameplate.
- DNV 2.7-1 Offshore Container: ISO or DNV standard offshore container with DNV 2.7-1 certified lifting pad eyes for safe offshore handling.
- Configurable 2, 3, or 4 Diver Mix Gas Panel: Can be built as a Nitrox panel (nitrogen and oxygen) or Heliox panel (helium and oxygen), with the exact gas mixture determined by a Life Support Technician.
- Per-Diver Monitoring and Recording: Dedicated monitor and 256 GB DVR for each diver, plus a 1 TB 8 channel DVR as a system black box.
- Emergency 9-Cylinder Gas Bank: Partitioned, acoustically insulated gas bank capable of pressurizing the chamber up to twice its Maximum Allowable Working Pressure in an emergency.
- Air Conditioning and Fire Safety: Two 2 TR split AC units, a fire line with portable extinguishers, and coverage across all three viewports.
- IMCA D037 Compliant Mix Gas Design: Diving mix gas panel designed in compliance with IMCA D037 for surface oriented mixed gas diving systems, and certified as per IMCA D018
- 150 MSW Rated Gauges: Entry lock, main lock, therapeutic, and pneumo supply gauges are all rated to 0-150 MSW, reflecting the deeper diving profile that mixed gas work supports.
- Dual Diver Radio Communication: 2 Diver Amron (2825A-12) or 3 Diver Amron radio (2830A-12), configurable in multiple combinations with push to talk as per client requirement.
- DP Status Alarm: Visual and audible alert if the dive support vessel’s DP system faults or loses positioning.
- Battery Backup for Up to 8 Hours: Control panel stays powered during a mains failure, keeping monitoring and communication running.
What’s Inside the Air Decompression Chamber?
- CO2 Scrubber (JK-CO2S-ALPHA): Draws CO2 from breathing air through a soda lime absorbent, supporting proper breathing for up to 4 hours.
- Hyperbaric Camera (JK-HYC-300M): Monitors motion inside the chamber, with the feed shown on the chamber control panel, fitted in both entry and main lock
- Hyperbaric Fire Extinguisher (JK-HYF-6.7L): A fire suppression device designed for pressurised environments.
- Talk Back Operator (JK-TBS): Internal loudspeaker in the main lock allowing occupants to hear voice communication from the control panel.
- Hygrometer with Thermometer: Measures and displays relative humidity and temperature inside the chamber.
- Hyperbaric Light (JK-HYL-300M): Provides lighting inside the chamber during pressurisation, fitted in both entry and main lock.
- Built In Breathing System, BIBS (Amron 350M): Lets the diver inside the chamber breathe oxygen supplied from the oxygen line.
- Fire Retardant Mattresses: Fitted on the bunks in the entry lock and main lock to reduce fire risk.
- Caisson Gauge (6″ dial, 0-150 MSW): Indicates internal depth or pressure inside the chamber.
Additional Features and Provision
- Air Conditioning System: Two 2 TR split AC units maintain controlled internal temperature for reliable operation in high ambient regions.
- Power Backup System: Comprehensive UPS, inverter, battery, and voltage stabilizer setup to eliminate power loss risk during critical operations.
- Supervisor Seating Arrangement: A 3 person sofa fitted inside the container for rest during extended operations.
- Environmental Monitoring: Wall mounted clock integrated with temperature and RH indicator.
- Interior Enhancements: Decorative lighting and ventilation fans for improved illumination and airflow.
- Emergency Gas Bank System: A dedicated 9-cylinder gas bank in a partitioned, acoustically insulated section, capable of pressurizing the chamber up to twice its Maximum Allowable Working Pressure in an emergency, with external access through a separate door.
- Supervisor Breathing Apparatus Set: Dedicated BA set for the supervisor during emergency situations while operating the diving panel.
- Fire Safety System: Fire line with portable extinguishers, covering all three viewports for enhanced safety.
Applications of the Mixed Gas Decompression Chamber
Deeper Commercial Diving Operations: Mixed gas support extends the working depth range beyond what straight air diving safely allows.
Dive Support Vessel Operations: A self contained chamber, control panel, and mix gas panel package that can be craned onto a DSV and connected without additional fabrication.
Recompression Treatment: Twin lock design allows a medical attendant to enter through the entry lock while the diver remains under treatment pressure in the main lock.
Saturation and Bounce Diving Support: Nitrox and heliox mixes are used across commercial mixed gas diving profiles to manage decompression obligation.
Offshore Oil and Gas Diving Support: Supports deeper platform and subsea work where air diving alone would extend decompression time significantly.
Projects Requiring Independent Inspection Certification: Suited to operators that require TPI verification rather than manufacturer self certification.
Technical Specifications of the Containerized Mixed Gas Decompression Chamber
Technical Specifications
| Specification | Detail |
|---|---|
| Model No. | JK-ADC-MGP-TPI |
| Container Type | ISO or DNV standard offshore container with DNV 2.7-1 certified lifting pad eyes |
| Outer Dimensions | 6 m x 2.5 m x 2.5 m |
| Max Allowable Working Pressure | 10 Bar |
| Volume | 6 m³ |
| Occupancy | 2 Persons (Entry Lock), 4 Persons (Main Lock) |
| Mix Gas Panel Configuration | 2, 3 or 4 diver, Nitrox (N2/O2) or Heliox (He/O2), gas mix determined by LST |
| Communication | Amron 2825A-12 (2 diver) or Amron 2830A-12 (3 diver), push to talk |
| Monitoring | Dedicated monitor per diver, common monitor for deck cam and CCTV |
| Data Storage | 256 GB DVR per diver, 1 TB 8 channel DVR as system black box |
For full details, download the complete technical data sheet.
Download Technical Data SheetCertifications & Standards for the Mixed Gas Decompression Chamber Manufacturer
The chamber shell is designed as per ASME Section VIII Division 1 (2025) and ASME PVHO-1 (2023), constructed to DNV TPI approved drawings and carrying a DNV stamped nameplate. The diving mix gas panel is designed in compliance with IMCA D037, the guideline specifically covering surface oriented mixed gas diving systems, and certified as per IMCA D018 for diving plant examination and testing. The container is built on a DNV or ISO standard offshore frame fitted with DNV 2.7-1 certified lifting pad eyes.
IMCA D018
Certified
IMCA D037
Certified
Why Choose J. K. Subsea Engineering as Your Mixed Gas Decompression Chamber Manufacturer
TPI Verified, IMCA D037 Compliant Build: Independently inspected chamber shell paired with a mix gas panel built specifically to the mixed gas diving standard, not adapted from an air system.
Deeper Depth Rated Gauges: 150 MSW rated gauges across the chamber and panel, reflecting the deeper working range that mixed gas diving supports.
Strong After-Sales Support: Ongoing technical support for offshore and subsea clients worldwide.
Flexible Nitrox or Heliox Configuration: Panel built as either Nitrox or Heliox, in 2, 3, or 4 diver configurations, matched to your diving profile.
Emergency Gas Redundancy: A dedicated, isolated 9-cylinder emergency gas bank capable of doubling chamber MAWP if needed.
Wide Product Range: We also manufacture and supply diving machinery containers, SRP containers, single basket LARS, diver air panels, and diving fittings and valves.
Frequently Asked Questions About the Mixed Gas Decompression Chamber
Related Products
Get In Touch
Get Your Mixed Gas Decompression Chamber Quote Today
Running a diving operation that needs nitrox or heliox support beyond straight air diving? Talk to our team at J. K. Subsea Engineering Pvt. Ltd. for pricing on our Containerized Air Decompression Chamber with Diving Mix Gas Panel (TPI), configuration options, and delivery timelines.