Your Safe & Reliable BOG Compressor Manufacturer in China!
Comair boil-off gas compressors, with our wide range of compression technologies, are available for extremely wide flow rates of 200-60,000 Nm3/h and working pressures of 8-350 bar. Whatever your applications are, we will surely have the right BOG compressor for your project!
Thanks to our experienced engineers, our boil-off gas compressors could meet all the relevant industrial standards and regulations. The commonly seen standards include API618, DNV, and ATEX certifications. Our BOG compressors not only provide you with reliable performance, but also safeguard your personnel and equipment.
All our boil-off gas compressors are made of parts and materials with low temperature toughness. The inlet temperature of your gas could be as low as -170 deg C(-256degF).
Boil Off Gas Compressor by Applications
BOG Compressor for LNG Receiving TerminalProviding a flow rate of over 100,000 Nm3/h with pressures up to 20 bar. Its high energy efficiency helps lower your running costs with continuous yearly operation.
BOG Compressor for LNG PlantCryogenic design with high availability. It has a wide suction flow rate from 30%-100%.
BOG Compressor for LNG Carrier / Engine SystemsSmall footprint with marine design. It is a perfect choice for your ship with limited space availability.
BOG Compressor for FSRUHighest safety assurance with marine coating and easy maintenance. It is designed for your FSRU with high reliability and quality.
BOG Compressor for LNG TrailerGreatly increasing your LNG fueling station efficiency by collecting the boil-off natural gas in the trailer. Its investment could be recovered within less than a year.
BOG Compressor for LNG Tankers200 to 3000 m3/hour at 3 to 15 bar. Protecting your production facility and staff while increasing your plant’s economic efficiency.
Types of Boil Off Gas Compressor
Centrifugal BOG CompressorSuper large flow of over 100,000 Nm3/h. API certified with proven continuous running, yearly, and high energy efficiency.
Reciprocating BOG CompressorAPI certified with high-pressure capability. It reaches a pressure of over 100 bar, and variable load control provides super energy efficiency for your factory.
Oil Free Screw BOG CompressorCompact package with low maintenance and oil-free design. It is a perfect choice for your marine and FSRU with limited space.
Comair Boil Off Gas Compressors With Lowest Total Cost Of Ownership
Comair BOG Compressors, over the previous years of development and innovation, have stood the test of time and won high praise from their clients. They offer unrivaled performance and efficiency for maximum project profitability; they offer over 98% reliability with extremely long service intervals of over 12,000 hours; by offering and designing the right compression solution for your project, your OPEX costs and CAPEX costs could be lowered by 10% to 12%.


Comair Boil Off Gas Compressors, Offering Greatest Flexibility
Comair BOG compressors, based on your project details, could offer the greatest flexibility in the industry. They could operate at gas temperatures from ambient temperature down to -170℃, and their flow rate could be adjusted from 10% to 100% according to your actual operational needs. Both skid-mounted and foundation-mounted solutions could be offered. For marine & offshore applications, they could even be DNV certified for safe lifting and handling. For on-shore installation, they can satisfy your strictest local environment regulations.
Comair Global Technical Support Services
Comair is close to you, wherever you are. With Comair BOG compressors, we guarantee a rapid response to support your compressors and plants across all five continents thanks to our worldwide distribution network. Over 100 certified technicians ensure the highest quality service assistance to your team. Our distributors could receive constant updates and advanced technology, which ensures advanced, timely, and efficient assistance to your compressors. Comair’s 24/7 global assistance, operating 24 hours a day, every day of the year, is dedicated to handling the requests from customers worldwide.

Over the last ten years, Comair boil-off gas compressors have been used to handle almost all the commonly seen gas or gas mixtures. These include ammonia, hydrocarbon, liquid propane, propylene, ethylene, Liquefied Natural Gas, Liquefied Petroleum Gas, and Liquefied Ethylene Gas.
The boil-off gas compressor is a customized product. Based on different requirements, working conditions, and standards, the compressor will differ greatly. Its price is normally affected by its flow rate, discharging pressure, motor power, and other required safety features. Please forward to us your requirements on the boil-off gas compressor so we can provide you with the correct price!
Comair boil-off gas compressors have already been widely used and accepted by clients for various applications. The leading include LNG receiving terminal, LNG/BOG engine system, LNG tankers, FPSO/VOC Recovers, Gas Handling, fertilizer plants for ammonia boil-off system, LNG carrier, LNG bunker vessel, and other chemical or petrochemical applications.
BOG compressors are the key equipment in the LNG industry, which are used to handle the naturally occurring evaporating gas during the LNG storage and transportation process. LNG is usually stored at extremely low temperatures of -162℃. Due to heat conduction, the boil-off gas will continuously evaporate, which will cause the internal pressure of the storage tank to be too high and thus result in safety risks. If it is burnt or discharged directly, it causes huge energy waste and severe environmental pollution. The BOG compressor is to collect and compress the boil-off gas for reliquefied or as fuel.
When we design and manufacture boil-off gas compressors, the following information shall be required, but we may discuss case by case for other possible details:
gas composition: if it contains corrosive gases, we shall need to choose corrosion-resistant materials;
Flow rate: We need to know whether the flow rate will change or not, so we can suggest variable speed BOG compressors. The flow rate is a key factor in determining the compressor size.
Inlet pressure & discharging pressure: We need to know the inlet pressure and required discharging pressure of your BOG compressors.



