Compact Dual-Gas Filling System
Budget: $30 – $250 USD
I need a complete engineering package for a compact, stainless-steel (SS316) system that transfers two high-pressure gases—oxygen and a second gas—from 4 L, 1 800-2 000 psi supply cylinders into a 5 L storage tank. The small tank will serve purely for storage. Filling must occur in a defined sequence: first oxygen to a set intermediate pressure, then the second gas until the vessel reaches roughly 1 000 psi total.
Gas purging is the preferred method for every line before and after each fill so that no pressure or cross-contamination remains prior to disconnecting the storage tank. The layout has to stay very tight—short runs only—and all wetted parts are to be SS316.
Control and safety monitoring will be handled through a PLC with an HMI. Plan on integrating:
• A pressure sensor on each supply cylinder
• A pressure and temperature sensor on the storage tank outlet
• Any main isolation or relief valves required for safe operation
• Variable-flow capability (exact flow rate is not fixed)
Deliverables I expect:
1. P&ID drawing that clearly shows the dual-gas sequence, purging loops, sensors, valves, and PLC I/O.
2. Detailed component list (valves, regulators, tubing, sensors, PLC/HMI hardware, fittings, etc.) with material specs.
3. A basic simulation or calculation set demonstrating that the pressure targets, purge cycles, and safety interlocks will perform as intended.
If anything in the brief needs clarification, let me know early so we can lock down the design approach.
Gas purging is the preferred method for every line before and after each fill so that no pressure or cross-contamination remains prior to disconnecting the storage tank. The layout has to stay very tight—short runs only—and all wetted parts are to be SS316.
Control and safety monitoring will be handled through a PLC with an HMI. Plan on integrating:
• A pressure sensor on each supply cylinder
• A pressure and temperature sensor on the storage tank outlet
• Any main isolation or relief valves required for safe operation
• Variable-flow capability (exact flow rate is not fixed)
Deliverables I expect:
1. P&ID drawing that clearly shows the dual-gas sequence, purging loops, sensors, valves, and PLC I/O.
2. Detailed component list (valves, regulators, tubing, sensors, PLC/HMI hardware, fittings, etc.) with material specs.
3. A basic simulation or calculation set demonstrating that the pressure targets, purge cycles, and safety interlocks will perform as intended.
If anything in the brief needs clarification, let me know early so we can lock down the design approach.