Basic Structure of a CNG Compressor
A CNG reciprocating compressor is like a large gas booster pump. Its core components include a cylinder, piston, intake valve, and exhaust valve. As the piston reciprocates within the cylinder, the intake and exhaust valves open and close alternately, achieving the intake, compression, and discharge of natural gas. This design is simple and reliable, suitable for high-pressure, low-flow-rate gas compression.
CNG Compressor Working Process
Intake Stage: The piston moves downwards, creating negative pressure within the cylinder. The intake valve opens, and natural gas is drawn into the cylinder.
Compression Stage: The piston moves upwards, the intake valve closes, and the gas is compressed.
Exhaust Stage: When the pressure reaches the set value, the exhaust valve opens, and the compressed natural gas is discharged.
Return Stage: The piston moves downwards again, preparing for the next intake.
Performance Characteristics of a CNG Compressor
CNG compressors feature high compression ratios and excellent sealing. Due to the flammability and explosiveness of natural gas, the compressor employs special materials and structural designs to ensure safety. Furthermore, the application of multi-stage compression and intercooling technology allows the compressor to compress natural gas to a high pressure of 200-250 bar while maintaining high efficiency.