Products

PRODUCTS

Biogas is produced during the biological breakdown of organic solids through anaerobic digestion. The gas generated through this process is an energy source that can be collected and utilized, or safely burned. Biogas is a highly moist mixture of gases consisting of approximately 55-70% methane (CH₄), 25-35% carbon dioxide (CO2) with trace amounts of nitrogen and hydrogen sulfide. When recovered, biogas may be used in a multitude of ways such as; running a boiler for heating an anaerobic digester or used to run an engine-generator to generate electricity.

Anaerobic digestion is one of the most effective methods of treating biosolids from municipal and industrial wastewater. It is an ideal method in meeting strict environmental regulations in highly urban areas. The anaerobic process occurs in closed vessels (digesters), covered ponds or lagoons. Soluble organics are converted to CH4 and CO2 in a two-step process.

Biogas collection and utilization is an important part of the anaerobic digestion process. The low-heat-content gas is saturated and contains harmful elements that are also corrosive to piping and equipment. It is important to handle biogas properly to ensure a safe and protected environment. The key aspect of design is to recognize that biogas handling equipment operates as a system, making Varec Biogas the leading experts and your total solutions provider.

BURNERS AND FLARES

Excess biogas produced will need to be flared. Flares are sized for the maximum gas production of the plant and is used to not only flare excess gas produced but handle combustion of biogas in emergency situations. Varec Biogas pioneered flame-front technology for pilot ignition systems. To address air emission limits, Varec offers our patented Model 244E Enclosed flares that combust biogas and guarantees 99% destruction removal efficiency.

WASTE GAS BURNER

ENCLOSED FLARE

BURNERS AND FLARES PRODUCTS

244E ENCLOSED
WASTE GAS BURNER
With no visible flame, the 244E systems use an innovative stack design to naturally induce the proper amount of combustion air which guarantees high destruction removal efficiency. Learn More
239A - 240 H-O-A
Waste Gas Burner /
Manual Ignition System
The Varec 239A Series Waste Gas Burner is designed for burning low-volume biogas generated in the anaerobic digestion process. Learn More
244W Waste Gas Burner
& Ignition System
The Varec 244W Series is a highly reliable flare and ignition system. It utilizes a patented pilot ignition system that mixes pilot gas and air at ground level to provide a robust, high temperature pilot. Learn More
249 ENCLOSED FLARE The sophisticated design of the Varec Biogas 249 Series is a top-of-the-line, full-featured, drop-ship product, primarily used in areas where flare stack emissions are controlled and regulated. Learn More
DIGESTER COVER EQUIPMENT

Varec Biogas supplies the safety equipment and accessories installed on digesters or on egg-shaped digesters. Safety equipment include redundant Pressure/Vacuum Relief Valve and Flame Arresters and Emergency pressure relief manhole covers. A Safety selector valve is used to allow switch-over of the redundant pressure relief system. Access hatches and sludge sampling hatch are required accessories. For floating steel covers, Varec Biogas offers mechanical position indicators with current output transmitters to monitor cover travel. Pressure relief systems are also required on intake lines of membrane gas holders.

DIGESTER COVER EQUIPMENT AND ACCESSORIES

DIGESTER COVER EQUIPMENT - VALVES

SSV SAFETY SELECTOR The Safety Selector Valve is designed to function as a switchover device that permits servicing of pressure relief devices with no process interruption. Learn More 2010B/2020B
RELIEF VALVE
The 2010B/2020B protects tanks from damage or deformation, and minimizes emissions to the environment, as well as loss of product due to evaporation. Learn More
5000/5010
FLAME ARRESTER
The 5000/5010 Series end-of-line flame arresters are used in gas piping systems, petroleum storage tank roofs and digester covers to prevent the propagation of a flame into the system. Learn More
5810B/5820B
Relief Valve and
Flame Arrester
The 5810B / 5820B Series Relief Valve and Flame Arrester is a combination of the 2010B/2020B Series Pressure and Vacuum Relief Valve and the 5000 Series Flame Arrester. Learn More

DIGESTER COVER EQUIPMENT - COVERS

220V VIEWPORT
INSPECTION COVER
The 220VP Series View Port Inspection Cover is designed for use on tanks where view inspection is desired. Learn More
220W ROOF MANHOLE
COVER WITH
SELF-LOCKING PEDAL
The 220W Series Roof Manhole Cover with self-locking pedal is a large diameter manway that provides quick and easy access for personnel onto digesters and tank. Learn More
400W EMERGENCY
PRESSURE RELIEF
MANHOLE COVER
The 400W Series is designed to provide emergency pressure and/or vacuum relief in storage tanks and vessels. Learn More
42 SAMPLING AND
GAUGING HATCH
COVER
The 42 Series is designed to provide quick access to tanks for product gauging, temperature measurement and sampling. Learn More
220 ROOF
MANHOLE COVER
The 220 Series is designed for use on tanks where quick and easy personnel access is desired. Learn More

DIGESTER COVER EQUIPMENT - ACCESSORIES

INSULATING
JACKET
The Varec Biogas Insulating Jackets provide additional cold weather protection for Varec Biogas safety equipment installed outdoors. Learn More
2592 COVER
POSITION INDICATOR
GAUGEHEAD TYPE
The 2592 Series Cover Position Indicator is designed for use with vertically-guided or spirally-guided floating digester and gas storage/holder covers. Learn More
8200 CURRENT
OUTPUT TRANSMITTER
The 8200 Series Current Output Transmitter is a precision analog instrument designed to mount directly to the Varec Biogas 2592 Series Cover Position Indicators. Learn More
DIGESTER GAS CLEANING/ DRYING EQUIPMENT

Varec Biogas offers a complete system that will remove moisture, H2S and siloxane in the gas. Moisture and particulate matter from biogas need to be removed when the biogas produced is utilized to run cogens. One particulate matter is siloxane, a common additive to everyday household items. During anaerobic digestion, silica is converted to silicon dioxide, or sand which overtime will reduce the efficiency, increase operating cost and cause failure for high capital equipment such as engine generators. Varec Biogas offers siloxane removal as part of our gas conditioning/drying system. H2S is a biogas constituent and need to be removed because it is highly corrosive to piping. More importantly, it will degrade the carbon-based filter used for siloxane removal.

DIGESTER GAS TO ENGINE GENERATOR

DIGESTER GAS CLEANING/DRYING EQUIPMENT

BIOGAS CLEANER The BioGas Cleaner is a complete package for digester gas cleaning in municipal wastewater or industrial wastewater. H2S removal is one of the key steps in cleaning when biogas is recovered and used to run engine generators. Learn More 235 GAS PURIFIER The Varec Biogas 235 Series Gas Purifier is designed as a cost effective method for hydrogen sulfide removal. Learn More 236 GAS PURIFIER The 236 Series Gas Purifier is designed to be the most cost-effective system to remove most H2S from biogas produced in anaerobic digesters, lagoons, and municipal landfills. Learn More 237 GAS CHILLER
AND DRYING SYSTEM
The 237 Gas Chilling and Drying System is designed for use in biogas conditioning systems to protect downstream equipment from the harmful effects of moisture. Learn More
GAS CONTROL EQUIPMENT

Biogas is produced within the digester at a rate that creates enough pressure to move gas through the piping system. The gas can be used to run mixing equipment for the sludge. When additional gas is produced and system pressure increases, gas is conveyed for storage at membrane gas holders, or for use in boilers or engine generators. Excess gas produced more than the gas utilization requires is flared.

DIGESTER GAS TO BOILER

GAS CONTROL - DRIP TRAPS

247/D HIGH PRESSURE
MANUAL DRIP TRAP
The 247 Series High Pressure Manually Operated Drip Traps are designed for collection and safe removal of condensate from high pressure gas piping. Learn More
246AT LOW PRESSURE
DRIP TRAP WITH
ELECTRIC ACTUATOR
The 246AT Series are designed for the automatic collection and safe removal of condensate from gas. Learn More
245 AUTOMATIC
DRIP TRAP
The 400W Series is designed to provide emergency pressure and/or vacuum relief in storage tanks and vessels. Learn More
247AT HIGH PRESSURE
DRIP TRAP WITH
ELECTRIC ACTUATOR
The 247AT Series High Pressure Drip Trap with Electric Actuator is designed for the automatic collection and safe removal of condensate from high pressure gas piping. Learn More
247 HIGH PRESSURE
MANUAL DRIP TRAP
The 247 Series High Pressure Manually Operated Drip Traps are designed for collection and safe removal of condensate from high pressure gas piping. Learn More
246 LOW PRESSURE
MANUAL DRIP TRAP
The 246 Series Drip Traps are designed for the collection and safe manual removal of condensate from gas. Learn More

GAS CONTROL - FLAME ARRESTERS & FLAME TRAPS

59 DETONATION
FLAME ARRESTER
The 59 Series In-Line Detonation Flame Arresters are designed for installation in piping systems to provide explosion protection. Learn More
5200 FLAME CHECK The 5200 Series Flame Check is designed to stop flash-backs in small pipe lines carrying flammable gases. Learn More 440 PRESSURE RELIEF &
FLAME TRAP
ASSEMBLY
The 440 Series Pressure Relief Assembly is designed for use on relief lines to flares or other fired equipment. Learn More

GAS CONTROL - VALVES & PRESSURE REGULATORS

211 LOW PRESSURE
CHECK VALVE
The 211 Series Low Pressure Check Valve is ideal for low pressure gas control lines where reversal of flow must be prevented. Learn More
386 BACK PRESSURE
REGULATOR
The 386 Series Back Pressure Regulator is designed to control upstream pressure in low pressure gas piping systems. Learn More
430 THERMAL
OPERATED SHUT OFF
VALVE
The 430 Series is designed to work in conjunction with a flame arrester for maximum protection from a flame front caused by flashbacks in the waste gas systems. Learn More
7100B PRESSURE
(EXPLOSION)
RELIEF VALVE
The 7100B Series is designed to protect low pressure storage tanks and systems from being over pressured. Learn More

GAS CONTROL - EQUIPMENT

217 WELL-TYPE
MANOMETER
The 217 Series Well-Type Manometer is a direct reading, single-tube type pressure gauge. Learn More
219 U-TUBE
MANOMETER
The 219 Series U-Tube Manometer is a versatile economical instrument for the measurement of pressures, vacuums or differential pressures. Learn More
231 FOAM SEPARATOR The 231 Series Gas/Foam Separator is designed for use in piping systems to remove foam typically caused by agitation from the digester discharge gas. Learn More 233 CONDENSATE
& SEDIMENT TRAP
The 233 Series is designed to remove liquid and solids from wet, dirty waste gas, assisting in protecting downstream equipment from corrosion, clogging, or water hammer. Learn More
248 CONDENSATE
ACCUMULATOR
The Condensate Accumulator is designed to store large volumes of liquid condensed from biogas and allow the condensate to drain while preventing any gas from escaping. Learn More