These compressors are specifically designed for the compression of the natural gas (CNG). Compressor types SW4, SW6 and B are currently operating all over Pakistan according to the specifications and guidelines of Oil and Gas Regulatory Authority (OGRA) and Hydrocarbon Development Institute of Pakistan (HDIP) in compliance with CNG Rules 1992. 

STANDARD SYSTEM FEATURES

• Balanced reciprocating design for low vibration and low noise
• Compressor layout designed for easy service and maintenance access
• Gauge panel displays system status, temperatures and pressures
• Electrical control (PLC/MCC) panel with alarm status indicators for unattended operation
• Non-lubricated cylinders, pistons and valves provide clean discharge gas
• Self-lubricating Teflon® composite piston rings and rod packing for more efficiency
• High-efficiency gas-to-air heat exchanger for inter-stage and discharge gas cooling
• Inlet filter (1.0 micron) and discharge filter (1,0 micron) at 99.95% efficiency
• Check valve and manual isolation valve at inlet & discharge
• Automatic unloading of compressor into ASME coded recovery tank at end of cycle
• Inter-stage pulsation dampeners and condensate drains
• Inter-stage piping protected by ASME "UV" stamp relief valves

STANDARD ELECTRICAL CONTROLS

• Electrical panel designed for remote-mounting in indoor location
• Contains main disconnect, switches, motor starters, fuses, transformers, termination strip
• Microprocessor-based programmable logic controller (PLC)
• Monitoring systems for diagnostics and data logging by phone / modem (Optional)
• Digital operator interface with LCD on-screen programming capability (Optional)
• Electronic soft-start systems to reduce starting current of drive motors (Optional)
• Self-monitored controls with automatic safety shutdowns and status indicators