Rng Fueling Stations

Qingdao Lenado Intelligent Equipment Co., Ltd. is one of the most reliable manufacturers and suppliers of rng fueling stations in China. With a professional production team, we are able to meet the needs of the majority of our customers. Welcome to wholesale bulk customized rng fueling stations from our factory.

RNG Fueling Stations | Oil-Free Bio-CNG Compressor Skids for Renewable Natural Gas

Core Value Proposition

✅ Oil-Free Compression for Zero Contamination | ✅ Multi-Stage Sealing Prevents Oil-Gas Mixing | ✅ Adaptive Inlet Pressure for RNG Feedstock | ✅ RIN Credit Protection & Environmental Compliance | ✅ ATEX/CE Certified for Sustainable Operations

Our RNG fueling stations are engineered specifically for renewable natural gas (bio-CNG) projects, delivering ultra-clean compression that preserves gas purity and protects carbon credit eligibility. Built on proven hydraulic reciprocating piston technology, these compressors accept variable-pressure RNG feedstock (3–20 MPa) from landfills, wastewater treatment plants, or agricultural digesters, and deliver vehicle-grade CNG at ≤25 MPa.

The core innovation lies in our oil-free compression cylinder design: the gas chamber and hydraulic oil chamber are physically separated by multi-stage sealing systems (Parker/SKF/Simrit). Even in the event of seal degradation, oil cannot enter the gas stream-ensuring post-compression oil content remains near 0 ppm. This eliminates the need for downstream oil-gas separators and protects dispensers, vehicle pipelines, and engines from carbon buildup.

Ideal for green fleet depots, carbon-neutral transportation corridors, and ESG-focused industrial projects, our RNG fueling stations combine 1,200–2,500 Nm³/h capacity with fully automated PLC control, remote monitoring via TCP/IP, and modular skid design for rapid deployment.

1. Oil-Free Compression Guarantees RNG Purity

The unique DRY1000 compression cylinder design physically isolates the gas chamber from the hydraulic oil chamber using multi-stage sealing technology. Even under complete seal failure, the pressure differential design prevents oil-gas mixing. Post-compression oil content remains <0.1 ppm, preserving RNG quality for RIN (Renewable Identification Number) credit certification and vehicle engine protection.

2. No Downstream Filtration Required

Because compression occurs without lubricating oil contact, there is zero risk of hydrocarbon contamination. This eliminates the need for expensive oil-gas separation filters, blowdown tanks, or post-compression purification systems-reducing CAPEX by 15–20% and simplifying maintenance.

3. Adaptive Inlet Pressure for Variable RNG Feedstock

RNG sources often deliver gas at fluctuating pressures (3–20 MPa). Our hydraulic drive system accepts this wide inlet range without external pressure regulators or stabilizers. The compressor auto-adjusts compression ratio based on real-time inlet conditions, maximizing throughput while minimizing energy waste.

4. Vertical Cylinder Design Extends Seal Life

Unlike horizontal compressors where piston gravity causes uneven seal wear, our vertical double-cylinder layout distributes load evenly. Combined with low piston linear speed (<0.5 m/s), this extends sealing element life by 3× compared to conventional designs-critical for RNG projects where downtime impacts carbon credit generation.

5. Low TCO & Sustainable Operations

With only 2×45 kW motor power for 2,500 Nm³/h capacity, actual shaft power averages ~75% of installed rating. The closed-loop ethylene glycol cooling system produces zero wastewater discharge. Multi-layer acoustic insulation achieves ≤75 dB @ 1m, enabling installation near residential zones without special permits.

Core Compression & Hydraulic System

Compression Cylinders: DRY1000 Series Hydraulic Reciprocating Double-Force Design (Genketech Gas)

Hydraulic Pumps: Hengyuan Hydraulics 32 MPa / 1480 r/min / 160ml/r Capacity

Ex-Proof Motors: Shandong Zotye 45kW–110kW (dIIBT4 / ATEX Certified)

Soft Starters: RF-45/37K for Smooth, Grid-Friendly Motor Startup

Oil-Free Sealing System (Premium International Brands)

O-Rings: Parker Fluorine Rubber (USA) – Chemical resistance for RNG impurities

Piston Seals: SKF DR1000-QH/QG (Austria) – Multi-stage barrier design

Piston Rod Seals: Parker DR1000-YG (USA) – Zero gas-oil crossover guarantee

Piston Oil Seals: Simrit DR1000-YH (Germany) – Extended life under variable pressure

Control & Automation

PLC Controller: Siemens S7-200Smart / CP1H-XA40D Series

HMI Touchscreen: Siemens Smart700 7" True-Color LCD

Communication: MODBUS RTU (RS485), TCP/IP, DRNET Remote Monitoring Platform

Software: Lifetime Free Upgrades, Fault Logging up to 100 Million Cycles

Safety & Monitoring for RNG Applications

Gas Detectors: ESD100 Combustible Gas Probes (15% LEL Fan Start / 25% LEL Auto Shutdown)

Pressure/Temperature Sensors: 0–40 MPa Transmitters, Oil Level/Temp Monitoring

ESD Interface: External Emergency Stop Compatible with Station-Wide Control

Purity Monitoring: Optional inline gas chromatograph interface for RIN documentation

Filtration & Cooling

Gas Inlet Filter: 50 μm Precision Particulate & Moisture Removal (Critical for RNG with trace siloxanes)

Return Oil Filter: 10 μm Magnetic Filter for Metal Particle Capture

Air Coolers: Fin-Type High-Efficiency Stainless Steel Tube Radiators (1590×806×350 mm)

Cooling Medium: Ethylene glycol antifreeze selected per ambient temperature; closed-loop zero-discharge design

Dispensing & Storage Integration

CNG Dispensers: JQD-B30B(3MSW) Three-Line Dual-Hose (1–20 Nm³/min, ±1.0% Accuracy)

Mass Flow Meters: E+H 8FF15 Stainless Steel (Traceable calibration for carbon accounting)

Storage Cascade: ZIP-270 Cylinders (1.5 m³ Water Volume @ 250 bar)

Unloading Post: CSXQZD11 Single-Hose (1–56 kg/min Flow Rate)

Break-Away Valves: ART-LOK NPT3/8 for Hose Safety

Electrical & Explosion Protection

Motor Cabling: Galvanized steel pipes for main motor to explosion-proof box

Auxiliary Cabling: Plastic-clad metal hoses for vibration/corrosion resistance

Anti-Surge Protector: Installed at power distribution cabinet input

Explosion-Proof Lighting: Integrated for safe nighttime maintenance

Explosion Protection & Certification

Electrical Enclosures: ExdeIIBT3 / ExdIIBT4 per ATEX Directive 2014/34/EU

CE Marking: Compliant with EU Machinery Directive & EMC Directive

Pressure Vessels: GB 150.2-2011 / ISO 9809 / ASME Section VIII Div.1 certified

High-Pressure Piping: 06Cr19Ni10 stainless steel per GB/T14976-94 / ASME B31.3

RNG-Specific Safety Logic

Gas Detection & Ventilation: Automatic exhaust fan activation at 15% LEL; complete system shutdown at 25% LEL

Purity Protection Interlocks: Auto-stop on abnormal inlet gas composition (optional chromatograph interface)

ESD Integration: External emergency stop interface accepts station-wide ESD signals for coordinated power & pipeline isolation

Temperature & Level Monitoring: Automatic alarm and shutdown on abnormal oil temperature, oil level, or cooling system failure

Hydraulic Over-Pressure Protection: Relief valves prevent system pressure exceeding 315 bar

Anti-Static & Grounding: All metallic components bonded and grounded per NFPA 52

Zero Contamination Guarantee for RIN Compliance

Physical Barrier Design: Unique three-stage cylinder architecture ensures gas and oil chambers never communicate

Seal Failure Redundancy: Even with complete seal degradation, pressure differential prevents oil ingress into gas stream

No Post-Filtration Required: Gas purity maintained without downstream oil-gas separators-reducing complexity and validation burden for carbon credit audits

Environmental Protection

Noise Reduction: Multi-layer sound insulation (high-frequency absorption + low-frequency blocking) achieves ≤75 dB @ 1m

Rain & Weather Protection: Integrated roof design with sealed panel joints; IP54 enclosure rating

Zero Emissions: Closed-loop cooling system with ethylene glycol antifreeze; no wastewater discharge

Sustainable Materials: Electrostatic-sprayed enclosure with pickling/rust removal/sandblasting pretreatment for 15+ year service life

Typical Applications

Landfill Gas to Vehicle (LFGV) Projects

Ideal for municipal landfill operators converting methane capture into transportation fuel. Our RNG fueling stations compress raw landfill gas (after basic purification) to vehicle-grade CNG while preserving methane content for RIN generation. Oil-free technology prevents catalyst poisoning in downstream emission control systems.

Wastewater Treatment Plant Fueling

Anaerobic digesters at wastewater facilities produce biogas suitable for RNG upgrading. Compact skid design fits constrained plant footprints; adaptive inlet pressure handles variable digester output. Remote monitoring enables unattended operation at multiple satellite sites.

Agricultural & Dairy Farm RNG Hubs

Support manure-to-energy projects where farms produce biogas for on-site vehicle fleets or regional distribution. Modular container design allows phased capacity expansion as feedstock supply grows. Low-noise operation enables installation near residential farmsteads.

Green Fleet Depots & ESG Transportation

Perfect for logistics companies, municipal transit authorities, and corporate fleets committed to carbon reduction. RNG fueling stations deliver verified low-carbon fuel with documentation support for Scope 1 emissions reporting and sustainability certifications.

Carbon Credit & RIN Optimization Projects

For developers maximizing revenue from renewable fuel credits. Oil-free compression preserves RNG quality for LCFS (Low Carbon Fuel Standard) and RFS2 (Renewable Fuel Standard) compliance. Integrated flow metering with E+H technology provides auditable data for credit verification.

Hybrid RNG/CNG Corridors

Support highway fueling networks that blend pipeline natural gas with renewable feedstock. Modular design enables parallel operation of RNG-dedicated and conventional compressors within the same skid footprint. PLC logic auto-prioritizes RNG feedstock when available to maximize carbon credit generation.

24/7 Remote Monitoring: DRNET software enables real-time performance tracking, fault diagnosis, and predictive maintenance alerts via internet connection

RIN Documentation Support: Software logs compression parameters, gas purity metrics, and operational hours for carbon credit verification

Free Lifetime Software Upgrades: PLC control software, HMI interface, and communication protocols updated at no charge

Technical Hotline: Email and phone support with 1-hour response time for critical RNG project issues

Customization Services for RNG Projects

Feedstock Adaptation: Configure inlet filtration and compression ratios for specific RNG sources (landfill gas, agricultural biogas, wastewater biogas)

Purity Monitoring Integration: Add inline gas chromatograph interface for real-time methane content and contaminant tracking

Carbon Credit Documentation: Custom reporting modules for LCFS, RFS2, or regional carbon market compliance

Climate Packages: Arctic (-40°C) or tropical (+55°C) operating temperature configurations

Dispenser Options: IC card payment systems with carbon credit tracking, receipt printers with RNG certification stamps, NGV1/NGV2 nozzles

Q1: How does oil-free compression protect RIN credits?

A: RIN (Renewable Identification Number) credits require verified fuel purity. Oil contamination-even trace amounts-can disqualify RNG from credit programs. Our physical barrier design guarantees <0.1 ppm oil content post-compression, preserving credit eligibility and simplifying audit documentation.

Q2: Can your compressors handle variable RNG feedstock quality?

A: Yes. The adaptive inlet pressure system (3–20 MPa) accommodates fluctuations common in biogas production. Optional inline gas chromatograph integration monitors methane content and trace contaminants (siloxanes, H₂S), with PLC logic auto-adjusting compression parameters to maintain output quality.

Q3: What maintenance is unique to RNG applications?

A: Beyond standard compressor maintenance, RNG projects benefit from: (1) Quarterly inlet filter inspection for siloxane/particulate buildup; (2) Annual seal inspection under variable pressure conditions; (3) Purity monitoring system calibration for credit documentation. Our DRNET remote platform alerts you before issues impact credit generation.

Q4: Do you provide documentation support for carbon credit programs?

A: Yes. Our control software logs compression parameters, gas purity metrics, operational hours, and maintenance records in formats compatible with LCFS, RFS2, and regional carbon markets. We also provide template reports for third-party verification audits.

Q5: Can RNG stations integrate with existing CNG infrastructure?

A: Absolutely. Modular skid design allows parallel operation with conventional CNG compressors. PLC logic can auto-prioritize RNG feedstock when available to maximize carbon credit generation, while seamlessly switching to pipeline gas during RNG maintenance or low-production periods.

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