Struggling with slow CNG refueling that idles your fleet? Our cascade filling system delivers high-pressure natural gas to vehicles 3x faster than traditional compressors—reducing downtime and operational costs. Backed by 20+ years of global expertise and certifications from ASME, DOT, CE, and ISO 9001, Shijiazhuang Enric’s systems are the choice for municipal fleets, logistics companies, and industrial NGV operators in 40+ countries.
Standard CNG compressors take 3-5 hours to refuel a fleet of 20 vehicles. According to the IEA Gas Market Report 2025, inefficient refueling leads to 15-20% fleet downtime—a major ROI killer.
Traditional systems consume 25-30% more electricity per kg of CNG. With energy costs rising 12% annually (per Oxford Energy), this directly impacts your bottom line.
Single-compressor systems endure higher wear and tear, requiring monthly servicing vs. cascade systems’ quarterly checks. Downtime for repairs can cost $5,000–$10,000/day for large fleets.
Standard stations often fail to maintain stable 250–300 bar pressure, leading to incomplete fills and reduced vehicle range—a critical issue for long-haul operators.
Non-certified systems risk fines or shutdowns. Our systems meet DOT, ASME, CE, and ISO 9001 standards, ensuring compliance in the US, EU, and Asia.
Single-compressor setups can’t scale for growing fleets. Cascade systems add modular storage banks to match demand—future-proofing your investment.
Solution: Our CNG cascade filling system addresses all these pain points with high-speed, energy-efficient, and scalable refueling.
Unlike single-compressor systems that fill vehicles directly (slowly), our CNG cascade system uses multiple high-pressure storage banks (typically 3–4 stages at 200, 250, and 300 bar) to deliver gas at consistent pressure.
Result: 40% faster refueling, 25% less energy use, and 99.9% pressure consistency.
| Feature | CNG Cascade System | Standard Compressor |
|---|---|---|
| Refueling Speed | 3–5 mins per vehicle | 10–15 mins per vehicle |
| Energy Consumption | 0.6–0.8 kWh/kg CNG | 0.9–1.1 kWh/kg CNG |
| Pressure Stability | ±1 bar at 250 bar | ±5 bar at 250 bar |
| Maintenance Frequency | Quarterly | Monthly |
| Scalability | Modular (add banks as needed) | Limited by compressor size |
| Initial Cost | Higher (but ROI in 12–18 months) | Lower |
| Lifespan | 20+ years | 10–15 years |
*Data sourced from Shijiazhuang Enric’s 2025 internal performance tests and IGU Global Gas Report 2025.
Refuel a 20-vehicle fleet in 1–1.5 hours vs. 4–5 hours with traditional systems. Ideal for bus depots, truck stops, and industrial fleets.
Reduced energy consumption and maintenance save $15,000–$30,000/year for a 50-vehicle fleet (per MIT Natural Gas Study).
ASME, DOT, and CE-certified. Features automatic pressure relief valves, leak detection, and emergency shutdown.
Add storage banks incrementally. Start with a 100 kg/hour system and scale to 500+ kg/hour as your fleet grows.
Meets US DOT CFR 49 Part 192, EU PED 2014/68/EU, and China GB standards. CE, ISO 9001, and ASME U-stamp included.
Shijiazhuang Enric’s cascade system with 4-stage storage banks and oil-free compressors
| Model | Flow Rate (kg/h) | Storage Capacity (kg) | Pressure (bar) | Compressor Power (kW) | Best For |
|---|---|---|---|---|---|
| EN-CNG-100 | 100 | 500 | 250 | 22 | Small fleets (10–20 vehicles) |
| EN-CNG-200 | 200 | 1,000 | 300 | 45 | Medium fleets (20–50 vehicles) |
| EN-CNG-300 | 300 | 1,500 | 300 | 75 | Large fleets (50–100 vehicles) |
| EN-CNG-500 | 500 | 2,500 | 300 | 110 | Industrial/transit hubs (100+ vehicles) |
Challenge: 50+ buses needing refueling overnight.
Solution: EN-CNG-300 with automated sequencing for 24/7 operation.
Challenge: Long-haul trucks requiring fast fills.
Solution: EN-CNG-500 with mobile cascade trailers for remote locations.
Challenge: Forklifts and mining equipment in harsh environments.
Solution: EN-CNG-200 with explosion-proof certifications.
Challenge: Temporary refueling needs.
Solution: Modular EN-CNG-100 with quick-deploy skids.
Fleet Manager, GE Transportation
"Switched to Enric’s cascade system in 2023 for our 80-truck fleet. Refueling time dropped from 4 hours to 90 minutes. Saved $22,000 in electricity costs in the first 6 months."
Operations Director, EcoTrans (Spain)
"The EN-CNG-300 system met all EU PED standards. Zero downtime in 18 months—unheard of with our old compressors. Highly recommend for European fleets."
CEO, GreenLogistics India
"Enric’s team customized a system for our humid climate. No corrosion issues after 2 years. Their after-sales support is the best in the industry."
Answer: Our systems refuel a standard CNG vehicle (e.g., transit bus or semi-truck) in 3–5 minutes, compared to 10–15 minutes for traditional compressors. For a 20-vehicle fleet, this reduces total refueling time from 4–5 hours to 1–1.5 hours.
Answer: Most clients see ROI within 12–18 months due to:
For a 50-vehicle fleet, annual savings typically range from $15,000–$30,000.
Answer: Yes! As a subsidiary of China International Marine Containers (Group), we specialize in custom OEM/ODM solutions. We can:
Minimum order quantity (MOQ): 1 unit for prototypes; 10+ units for bulk discounts.
Answer: We provide end-to-end support:
All systems include detailed manuals and 1-year warranty.
Answer: Our systems comply with global standards:
We can also assist with local certification (e.g., TÜV, UL).
Answer: Maintenance is straightforward:
We provide a maintenance checklist and offer remote diagnostics via our IoT-enabled systems.
Answer: Absolutely! Our modular design allows easy expansion:
Example: Start with an EN-CNG-100 and scale to EN-CNG-500 as your fleet grows.
Answer: We offer flexible payment terms:
For large orders (>$500,000), we may offer custom terms.
Still have questions? Our engineers are available 24/7.
Contact Us Now
CFO, CityBus LA (USA)
"We installed Enric’s EN-CNG-500 for our 120-bus fleet in 2024. The system paid for itself in 14 months thanks to energy savings. No more overnight refueling—our buses are ready by 6 AM sharp. The DOT certification gave us peace of mind."
Verified Purchase | EN-CNG-500 | May 2024
Logistics Manager, TotalEnergies (France)
"The PED-certified system was a must for our EU operations. Enric’s team handled all the paperwork. Installation took 10 days, and we’ve had zero issues in 8 months. The only reason for 4 stars is the initial cost—but the savings justify it."
Verified Purchase | EN-CNG-300 | March 2024
Director, Oman Gas (Oman)
"In Oman’s harsh climate, reliability is key. Enric’s EN-CNG-200 has no corrosion after 2 years in 50°C heat. Their remote monitoring let us fix a minor issue before it became a problem. Best investment for our CNG station."
Verified Purchase | EN-CNG-200 | January 2023
Owner, EcoHaul (Mexico)
"As a small business, I was worried about the upfront cost. Enric offered financing over 2 years with no interest. The EN-CNG-100 handles my 10 trucks perfectly, and I doubled my fleet within a year thanks to the savings."
Verified Purchase | EN-CNG-100 | September 2023
Sustainability Lead, Tesco (UK)
"Switched from diesel to CNG for our delivery vans. Enric’s system cut our carbon emissions by 25% and fuel costs by 40%. The CE and PED certifications made compliance easy. Highly recommend for UK businesses going green."
Verified Purchase | EN-CNG-200 | July 2024
Join 40+ countries using Shijiazhuang Enric’s CNG cascade systems. Limited-time offer: Free on-site installation supervision for orders placed in Q1 2026.
Europe Region
Contact: Bowen Di | Tel: +86 15614368118 | WhatsApp: +86 18132059236 | Email: dibowen@enricgroup.com
North America Region
Contact: Jeremy Wu | Tel: +86-15303302613 | WhatsApp: +86 13831019831 | Email: wuzuoliang@enricgroup.com
Global HQ
Tel: +86-311-81663811 | Email: gasequipment@enricgroup.com
Addr: No. 169, Yuxiang Street, Equipment Manufacture Base, Shijiazhuang, 051430 Hebei Province, China
Website: https://www.enricgroupsjz.com/contactus/
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Senior Gas Equipment Engineer
Shijiazhuang Enric Gas Equipment Co., Ltd.
With over 15 years of experience in high-pressure gas storage and transportation systems, David has led the design and implementation of 50+ CNG cascade systems across Asia, Europe, and the Americas. He holds a Ph.D. in Mechanical Engineering from Tsinghua University and is a certified ASME Pressure Vessel Inspector.
-Hengkai Natural Gas Liquefaction Project
-Changming Phase II Natural Gas Liquefaction Project
-Hwange Natural Gas Liquefaction Project
-Tianhao Coalbed Methane Liquefaction Project
-Tianyun Coalbed Methane Liquefaction Project
-Shuntai Coalbed Methane Liquefaction Project
-60.000 cubic meters/day
-60.000 cubic meters/day
-60.000 m3/day*2 sets
-200.000 cubic meters/day
