Hydraulic Compressor
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CNG booster compressors& associated accessories including electrical panel, radiator, air compressor etc.
These CNG booster compressors are equipped with programmable logic controller (PLC) and shall be SCADA compatible.
Suction Pressure: 200 to 30 bar (G)
Discharge Pressure: 250 bar (G)
Average flow capacity: 500 SCMH
Suction Temperature: Nominal 35ºC, Max. 45ºC
Discharge Temperature: Max 8ºC above ambient
Ambient Temperature: 48ºC Maximum      Â
Medium: Natural Gas, Dry, SG – 0.58 to 0.65
Type: Hydraulic operated cylinders
Configuration: Multi stage double acting
Lubrication: Non lubricated
Valves: Suction & Delivery Valves
Gas meter: Mass flow meter based on Coriolis principle
Driver: Electric Motor
Drive: Hydraulic
Motor :(i)Main Motor (ii)Water Pump (iii)Radiator (iv)Air Compressor (v) Exhaust fan
Cooling: Water cooling to Gas Heat Exchanger Tube in Tube type
Control Panel: Starter and Control Panel with Star/ Delta starter  Â
Controls: PLC Control, Auto Start / Stop ON PR. Setting Manual Draining
Instrumentation: PR. / TEMP. TRIPS, Gas leakage and fire trips
Vessels: Discharge Pulsation Dampner
Packaging: Complete Compressor Unit Fabricated on a Single Skid to make a Single operating unit considering ease of maintenance
Priority panel: 2-bank Configuration priority provided
Gas Detector & Flame Detector provided of approved makes
Door interlocked isolator
Panel complete with start and stop push buttons, hours run meter, power on and fault indication lamps, and fault reset button and HMI (Siemens / Schneider make).
All necessary timers and intrinsically safe relays to control the system on an automatic starting and stopping basis
All the interlock, monitoring and controlling of the CNG compressor package is done through PLC based control system of proven type and the Make of the PLC is Siemens(S7 300), Schneider M340 PLC and Allen Bradley (Micrologix 1200) of latest version or equivalentÂ
PLC is housed inside flameproof IIA/IIB (Ex’d’) enclosure. Local operator panel is provided on the flameproof enclosure. The operator panel is provided for parameterization, indication, monitoring, and alarms and first out sequence of the system. PLC system have memory modules for storing user programs, symbol lists, Program comments and should facilitate debugging / trouble shooting without the application program. Program is ladder logic and communication is in English for each run.
The Protocol and the other details for Interfacing is specified clearly. The Communication protocol is an open protocol i.e. MODBUS RTU Protocol for communicating with slave devices.
Power supply to PLC supply is 24 VDC.
The PLC has an Industrial Ethernet Module with min TWO Ethernet port and Modbus RS-485 (2-wire) port, Configured and programmed, to establish remote communication of PLC with the SCADA server.
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