CNG Pressure Regulating (PRU / PRMS)

The CNG pressure regulating unit is a special device that can automatically reduce the pressure of the gas transmitted from the industrial pipeline to the required pressure.

It can reduce the higher gas pressure at the equipment inlet to the pressure value required by the equipment outlet, and can integrate metering and odorizing functions as required.
It integrates pressure regulation, metering, filtering, emergency shut-off, and safety release.
Suitable for natural gas, artificial gas, coke oven gas, liquefied petroleum gas, methane gas and other gases.

The CNG compressed natural gas (below 25 MPa) go through the filter, high pressure ball valve and high-pressure emergency cut-off valve into the primary heat exchanger.

Within the gas heat exchanger for heating, gas after primary voltage regulator to 0.7 ~ 1.2 MPa, after the secondary heat exchanger and the secondary voltage regulator to 0.2 ~ 0.4 MPa (if the outlet pressure is lower, the third stage decompression), enter the flow calculation of the flow meter, decompression at all levels of pressure, temperature and emergency cut-off valve and interlock control system.

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Performance Validation (Taking 2000Nm³/H Model as Example)

Pressure Regulation Accuracy: Outlet pressure fluctuates by ≤±0.05bar, ensuring stable supply to end-use equipment.

Air Tightness Test: Passes a 25MPa pressure test with no leakage, deformation, or noise—complying with strict safety standards.

Temperature Adaptability: Operates normally in ambient temperatures of -20~50℃, making it suitable for most climates.

Typical Models	Inlet Pressure	Outlet Pressure	Optional Function
200Nm³ per hour	250bar	2~4bar	Heat exchanger; Mass flow meter; PLC automatic control; HMI; CNG Decanting Post; High pressure hose; International brand valves
300Nm³ per hour	250bar	2~4bar
500Nm³ per hour	250bar	2~4bar
1000Nm³ per hour	250bar	2~4bar
2000Nm³ per hour	250bar	2~4bar
3000Nm³ per hour	250bar	2~4bar
6000Nm³ per hour	250bar	2~4bar

Remark: The above specifications are only for typical types. The more accurate & detailed parameters and technical drawings are available upon request

The CNG PRU (PRMS) can be shipped by standard containers, 20GP, 40GP, 40HQ, with good fixed protection in container.

Packaging:

Main System: The skid-mounted CNG PRU is fixed on a steel pallet with anti-vibration pads to absorb shocks during transportation. It is wrapped with moisture-proof film and a heavy-duty tarpaulin to protect against rain, dust, and mechanical damage.

Precision Components: Pressure regulators, flowmeters, and HMIs are packed in foam-lined, waterproof boxes with clear labeling. This prevents damage to delicate parts and simplifies identification during installation.

Accessories: High-pressure hoses, filters, and spare parts are packed in separate labeled boxes, ensuring all components are accounted for upon delivery.

Shipping Methods:

Standard Container Shipping: Uses 20GP (20ft General Purpose), 40GP (40ft General Purpose), or 40HQ (40ft High Cube) containers. This method is cost-effective, secure, and suitable for both sea and land transportation.

Custom Shipping Solutions: For oversized models (e.g., 6000Nm³/H), we coordinate with logistics partners to use flatbed trucks or bulk vessels, with additional reinforcement to secure the system during transit.

Logistics Coordination: Our team provides detailed shipping documents (packing list, certificate of origin, customs clearance papers) and works with the user to confirm delivery schedules. We also offer on-site unloading guidance to ensure safe handling of the system.

Sinocleansky

Our CNG PRU is manufactured under rigorous quality control processes, ensuring compliance with industry standards and providing users with reliable, high-performance equipment.

Certifications & Reports:

Quality Management Compliance: Manufactured in accordance with ISO 9001 quality management system standards, ensuring consistent product quality.

Comprehensive Inspection Reports: Every CNG PRU comes with a full set of reports, including:

Product quality certificate

Product qualification certificate

Product technical performance commissioning report (verifying pressure regulation accuracy, flow rate, and safety functions)

Product assembly inspection report

Pressure test report (hydraulic and pneumatic tests)

Air tightness test report (25MPa test pressure, no leakage)

Valve qualification certificates (from international brands)

Safety accessory verification certificate (for pressure gauges, relief valves)

Copy of product nameplate

Regional Certifications: On request, we provide regional certifications such as CE (for European markets), CSA (for North America), or GB (for Chinese markets) to meet local regulatory requirements.

Warranty & Support:

Warranty coverage: 12-month warranty for the entire system, 24-month warranty for key components (pressure regulators, heat exchangers, flowmeters).

After-sales service: Our team provides on-site installation guidance, operational training, and maintenance support. We also offer a fast spare parts supply service to minimize downtime in case of component failure.

Traceability: Every CNG PRU is assigned a unique serial number, allowing for full lifecycle tracking of components and maintenance records.