PRESSURE REDUCING SKID
About Product
Complete, Ready-to-Use Hydrogen Unloading Solutions
At Onus Group, we provide complete Hydrogen Unloading and Pressure Reducing Stations, tailored to suit your precise process requirements. Each unit is a fully integrated, skid-mounted, plug-and-play solution, designed for direct connection to cylinders or truck trolleys through high-quality pigtails and manifolds.
Our stations include:
More than 2,000 installations worldwide stand testimony to our reliability and engineering excellence.
✔️ Safe and Redundant Design
• Built-in safety shut-off mechanism with 100% redundancy
• Dual safety features on the first-stage regulator:
• Safety shut-off loop
• Full capacity safety relief valve
• Optional nitrogen purging for enhanced safety
• No external electrical or pneumatic supply required for shut-off operation
✔️ Full Utilization of Hydrogen
• Low pressure drop design ensures complete emptying of cylinders
• Reduces batch time and cylinder changeovers
• Enables maximum hydrogen recovery, improving overall efficiency
✔️ High Accuracy & Pressure Control
• Maintains precise outlet pressure using two-stage reduction,
even as inlet pressure falls from 2000 PSIg to near outlet levels
✔️ Compact, Maintenance-Friendly Construction
• Compact layout with easy access to components
• Welded joints at high-pressure points—only a single flange connection—ensuring leak-free operation
• Easy maintenance: No need to remove components from the line for servicing
✔️ Flexible Configuration
• Customizable based on:
o Inlet pressure and flow rate
o Outlet pressure requirements
o Desired level of automation and remote monitoring
o Safety interlock preferences
✔️ Redundant Operation (Twin Skid Option)
• For critical applications, we offer twin skids—one active, one standby—with a fabricated common outlet, ensuring uninterrupted supply suring uninterrupted supply.
Design & Performance Standards
• Design Code: ASME B31.3
• Design Pressure Rating:
o Inlet: ANSI B16.5 Class 1500#
o Outlet: Class 600# / 150# (Screwed or Flanged)
• Maximum Operating Temperature: 65°C
• Maximum Inlet Pressure: 210–250 Bar
• Outlet Pressure Range: 1 to 22 Bar (Standard), up to 85 kg/cm² on request
• Flow Capacity:
o Standard: Up to 50 Nm³/hr
o Extended Range: Up to 10,000 Nm³/hr (Consult Onus Team for customized solutions)
• Line Sizes Available: 15 NB to 125 NB
Material of Construction (MOC)
Body Materials
• Stainless Steel (SS304 / SS316 / SS304L / SS316L)
• Carbon Steel
• Monel
• Hastelloy C
Trim Materials
• SS316L
• SS304L
• Hastelloy C
End Connections
• Flanged Ends (ANSI B16.5)
• Screwed Ends (Threaded as per customer specification)
