CNG/CBG Compressors & Boosters
Online CNG compressors, CNG/CBG boosters and CBG high- and low-pressure compressors — selected, integrated, installed and commissioned by Urjika.
600 / 1200 SCMH online22 / 37 kW boostersCBG HP up to 250 barCBG LP up to 12 bar
600 / 1200
SCMH online CNG compressors
250 / 450
SCMH boosters (22 / 37 kW)
250 bar
Discharge for CNG & CBG HP
15+ yrs
CNG O&M and projects experience
Overview
The right compressor for every pressure step
Compression is the heart of any CNG station or CBG plant — and the biggest single driver of power cost and uptime. Urjika helps you select the right machine for your inlet pressure, flow and duty, then integrates it with cascades, priority panels, tubing and dispensing.
We work with proven compressor manufacturers and take full responsibility for engineering, supply, installation, commissioning and after-sales coordination, backed by our team’s 15+ years of hands-on experience in CNG operations, maintenance and projects with leading CGD companies.
Product range
Complete Range of CNG/CBG Compressors
CNG · Online
Online Motor-Driven Compressor
For CNG mother and online stations fed directly from the CGD pipeline.
600 / 1200 SCMH
16–21 bar(g) suction → 250 bar(g)
90 / 160 kW flameproof motor
CNG / CBG · Booster
Hydraulic Booster Compressor
For daughter stations — boosts gas from mobile cascades so more gas can be dispensed.
22 kW — 250 SCMH
37 kW — 450 SCMH
Cascade Roof Mounting Structure
CBG · High pressure
CBG HP Compressor
Compresses purified biogas to 250 bar for cascades, fill posts and dispensing.
VPSA: 0.1–0.4 bar inlet
Membrane: 8–12 bar inlet
250 bar discharge
CBG · Low pressure
CBG LP Compressor
Raises raw biogas pressure ahead of membrane upgrading systems.
0.1–0.3 bar suction
Discharge up to 10–12 bar
Non-lubricated, water-cooled
At a glance
Compressor selection guide
| Model | Application | Suction pressure | Discharge pressure | Capacity | Drive |
|---|---|---|---|---|---|
| CNG Online Compressor | CNG online / mother stations on the CGD pipeline | 16 – 21 bar(g) (19 bar(g) nominal) | 250 bar(g) | 600 / 1200 SCMH | Flameproof electric motor, 90 / 160 kW |
| CNG / CBG Booster | Daughter stations — boosting gas from mobile cascades | 200 → 40 bar (variable) | 250 bar(g) | 250 SCMH (22 kW) · 450 SCMH (37 kW) | Hydraulic drive, electric motor |
| CBG HP Compressor — VPSA | After VPSA purification at CBG plants | 0.1 – 0.4 bar(g) | 250 bar(g) | Project specific | Flameproof motor, VFD compatible |
| CBG HP Compressor — Membrane | After membrane purification at CBG plants | 8 – 12 bar(g) | 250 bar(g) | Project specific | Flameproof motor, VFD compatible |
| CBG LP Compressor | Before membrane purification systems | 0.1 – 0.3 bar(g) | Up to 10 – 12 bar(g) | Project specific | Flameproof motor, IE2 |
Technical specifications
Typical package specifications
CNG online compressor (1200 SCMH)
Type
Three-stage, two-throw, horizontal balanced-opposed, lubricated reciprocating
Speed
1,500 rpm
Main motor
160 kW, energy-efficient IE2, flameproof
Crankcase
Pressurized — zero packing vent loss
Cooling
Air-cooled heat exchanger for inter-stage, after-cooling and oil
Discharge temperature
Ambient + 10°C
Noise
75 ± 3 dBA at 1 m from enclosure
Package weight
Approx. 13 t (excluding cascade)
CNG online — controls & safety
Control panel
PLC-based, flameproof, integrated in package
SCADA
RS485 / Ethernet communication
Metering
Coriolis flow meters at inlet and discharge
Pressure vessels
Volume bottles & recovery vessels as per ASME Sec VIII Div. 1
Protection
Lube no-flow and vibration trips, PSV on each stage
Fire protection
CO₂ flooding system
Area classification
Zone 1 / Zone 2, Gas Group IIA/IIB, T3
CNG / CBG booster
Type
Hydraulically operated, multi-stage, double-acting
Valves
Non-lubricated suction & delivery valves
Hydraulic pump
Axial piston, variable displacement
Cooling
Water–gas shell & tube heat exchanger with radiator
Controls
PLC — auto start/stop on pressure setting
Priority panel
Three-bank output
Safety
Gas & flame detectors, CO₂ flooding, acoustic enclosure
Electrical
Class I Div I / Zone 1, Group IIA/IIB
CBG HP compressor
Type
Multi-stage lubricated reciprocating (3–5 stages)
Inlet
VPSA 0.1–0.4 bar(g) or membrane 8–12 bar(g)
Discharge
250 bar(g)
Cooling
Finned air coolers with separator after each stage
Oil removal
Coalescing discharge filtration
Drive
Flameproof motor, VFD compatible
Protection
Low lube oil, high discharge temperature, suction low/high trips
CBG LP compressor
Type
Horizontal balanced-opposed, non-lubricated, double-acting
Stages
Two-stage, water-cooled
Suction / discharge
0.1–0.3 bar(g) → up to 10–12 bar(g)
Heat exchangers
Shell & tube, removable bundle
Capacity control
2-step electro-pneumatic (optional)
Motor
IE2 flameproof, TEFC
Urjika scope
Selection
Inlet pressure, flow and duty analysis
Integration
Priority panel, cascades, tubing and dispensers
Installation
Erection, tubing, electrical and earthing
Commissioning
Testing, PESO documentation and handover
After-sales
O&M coordination and spares support
Where each machine fits
From gas source to vehicle
01
CGD pipeline
16–21 bar(g) natural gas
02
Online compressor
Compresses to 250 bar
03
Mobile cascade
Transports gas to daughter stations
04
Booster
Boosts cascade gas back to 250 bar
05
Dispenser
Fills vehicles at 200 bar
For CBG plants
Low pressure and high pressure compression
01
Raw biogas
From digester
02
LP compressor
Up to 10–12 bar (membrane route)
03
Purification
VPSA or membrane upgrading
04
HP compressor
Compresses CBG to 250 bar
05
Cascades & fill posts
Storage, dispatch or grid
Gallery
Our compressor range
Online CNG compressors, hydraulic boosters and CBG compressor packages, by capacity.
FAQ
Frequently asked questions
Q.What is the difference between an online compressor and a booster?
An online compressor draws gas directly from the CGD pipeline at 16–21 bar and compresses it to 250 bar. A booster is used at daughter stations: it draws gas from a mobile cascade whose pressure keeps falling, and boosts it back to 250 bar so more gas can be dispensed.
Q.Can the compressor connect to our SCADA?
Yes. PLC control panels provide RS485 / Ethernet communication for SCADA integration.
Q.Which CBG compressor do I need?
It depends on your purification technology. VPSA systems deliver gas at 0.1–0.4 bar, so the HP compressor starts from near-atmospheric pressure. Membrane systems need an LP compressor before them (up to 10–12 bar) and deliver 8–12 bar gas to the HP compressor.
Q.How are the compressors made safe for hazardous areas?
Packages use flameproof motors and electrical equipment rated for Zone 1 / Zone 2 gas groups, with relief valves, trips, gas and flame detection and CO₂ flooding as applicable.
Looking for the right compressor?
Tell us your inlet pressure and flow — we will size the right unit.
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