Varec Biogas^™ Gas Control Equipment

VAREC BIOGAS™ 59 IN-LINE DETONATION FLAME ARRESTER

The Varec Biogas™ 59 In-Line Detonation Flame Arrester is tested for field conditions not mandated by existing standards, including momentum impulse (long-run stable detonation), thermal failure, and re-ignition of downstream unburned gases, providing maximum protection against all modes of flame propagation.

FEATURES

• Tested in accordance with USCG CFR 154
• Maximum allowable pressure to 150 psig (1 mPa)
• Bidirectional flow
• Installed in either horizontal or vertical piping
• Flame element easily removed, separated, and cleaned in the field

VAREC BIOGAS™ 211 LOW PRESSURE CHECK VALVE

The Varec Biogas™ 211 Low Pressure Check Valve is ideal for low pressure gas control lines to prevent reversal of flow. The check valve is normally installed downstream of (a) meters, (b) regulators, or (c) other gas control devices that could be damaged by an accidental reversal of gas flow, pressure, or explosion shock waves. This valve is found in systems where gas flow between multiple digesters or gas holders must be prevented. It is used to prevent gas flow reversal between several pieces of equipment installed in parallel.

FEATURES

• Maximum flow with minimum pressure drop
• Removable/replaceable seat rings
• Heavy wall-cast housing in 356 T6 low copper aluminum
• Flanged or threaded connections

VAREC BIOGAS™ 217 WELL-TYPE MANOMETER

The Varec Biogas™ 217 Well-Type Manometer is a direct reading, single-tube type pressure gauge that provides both long-term reliability and high precision for accurate pressure measurement. This is extremely important in a low-pressure waste gas system because it indicates digester efficiency.

FEATURES

• Adjustable scale
• Indoor or outdoor installation
• Easy field tube replacement
• 15-inch, 20-inch, and 30-inch WC range
• 250 psig pressure rating

VAREC BIOGAS™ 231 GAS/FOAM SEPARATOR

The Varec Biogas™ 231 Gas/Foam Separator uses piping systems to remove foam caused by agitation from the digester discharge gas. To protect downstream equipment from corrosion or clogging, the foam must be dispersed and collected. The 231 Gas/Foam Separator does just that.

FEATURES

• Stainless-steel construction
• Continuous spray wash system
• Foam and particulates removal
• High- and low-water level alarms
• Large reservoir with baffle

VAREC BIOGAS™ 233 CONDENSATE AND SEDIMENT TRAP

The Varec Biogas™ 233 Condensate and Sediment Trap removes large volumes of condensed water from gas that has cooled when exiting the digester. Sediment entrained in the gas will drop out and accumulate into the trap, protecting downstream equipment from damage caused by solids.

FEATURES

• Large reservoir capacity
• Welded steel construction
• Galvanized finish, epoxy-coated internals, and stainless-steel option
• Easily cleaned
• 25 psi (172.5 kPa) working pressure

VAREC BIOGAS™ 245 AUTOMATIC DRIP TRAP

The Varec Biogas™ 245 Automatic Drip Trap continuously collects and safely removes condensate from low points in filtered gas piping systems, preventing dirt and particulates from clogging gas flow and increasing pressure drop. Continuous removal of condensate from the system protects piping and equipment from possible damage caused by corrosion and water hammer.

FEATURES

• Corrosion-resistant aluminum construction
• Automatic float-operated needle valve
• 2-quart capacity
• 25 psig (172.5 kPa) working pressure

VAREC BIOGAS™ 246 SERIES LOW PRESSURE MANUAL DRIP TRAP

The Varec Biogas™ 246 Series Low Pressure Manual Drip Trap manually collects and safely removes condensate from gas. Condensate removal from gas piping systems protects piping and other equipment from damage caused by corrosion or water hammer. This system can also lower the pressure drop caused by water lying in low spots in the pipe that restricts gas flow.

FEATURES

• Corrosion-resistant aluminum construction
• Positive seal against gas escape
• 2.5- and 6-quart reservoir capacity
• 5 psig (34.5 kPa) working pressure
• Manual operation

VAREC BIOGAS™ 246AT LOW PRESSURE DRIP TRAP WITH ELECTRIC ACTUATOR

The Varec Biogas™ 246AT Low Pressure Drip Trap with Electric Actuator automatically and safely collects condensate from gas piping systems. This unit can be installed in confined spaces and Class 1, Divisions 1- or 2-rated areas. A control panel for remote operation of multiple electric actuated drip traps is available.

FEATURES

• 2.5-quart and 6-quart reservoir capacity
• Corrosion resistant aluminum construction
• Positive seal against gas escape
• Optional UL-approved control panel

VAREC BIOGAS™ 247AT HIGH PRESSURE DRIP TRAP WITH ELECTRIC ACTUATOR

The Varec Biogas™ 247AT High Pressure Drip Trap with Electric Actuator automatically collects and safely removes condensate from biogas with working pressures that top 100 psig (688 kPa). This system protects piping and other equipment from possible damage caused by corrosion or water hammer. It can also lower the pressure drop caused by water lying in low spots in the pipe that restricts gas flow.

FEATURES

• Double-seal ball plug valves
• 100 psig (688 kPa) working pressure
• 4-quart capacity reservoir
• All 316SS

VAREC BIOGAS™ 247D HIGH PRESSURE MANUAL DRIP TRAP

The Varec Biogas™ 247D High Pressure Manual Drip Trap prevents gas from escaping while conveniently draining the system of accumulated condensate. This system can also lower the pressure drop caused by water lying in low spots in the pipe that restricts gas flow.

FEATURES

• Double-seal ball plug valves
• Low-profile, dual-chamber design
• 100 psig (688 kPa) working pressure
• 4-quart and 6-quart capacity reservoir
• Locking lever
• All 316SS option

VAREC BIOGAS™ 248 CONDENSATE ACCUMULATOR

The Varec Biogas™ 248 Condensate Accumulator stores a significant amount of condensate. Biogas is usually hot and saturated when it leaves the digester. It continues to cool as it goes through the piping system, causing water condensate to drop out. This system removes condensate from the biogas piping system to protect piping and other equipment from possible damage caused by corrosion or water hammer.

FEATURES

• Large condensate reservoir
• Simple operation
• Optional sight glass and level switches

VAREC BIOGAS™ 386 BACK PRESSURE REGULATOR

The Varec Biogas™ 386 Back Pressure Regulator is used in low pressure gas systems. It normally operates closed and will open when the upstream pressure reaches the regulator’s predetermined settings. To control the flow of gas to the flare, it uses a large, spring-loaded diaphragm while relieving excess gas with minimal pressure drop. The pressure setting can easily be adjusted using the adjusting screw on top of the valve. An enclosed pointer provides a quick visual of the pressure.

FEATURES

• Available in 2-inch to 12-inch (50 mm to 300 mm) sizes
• Large diaphragm
• Spring-loaded
• Corrosion-resistant
• Optional three-way solenoid valve

VAREC BIOGAS™ 430 THERMAL OPERATED SHUT-OFF VALVE

The Varec Biogas™ 430 Thermal Operated Shut-off Valve is installed on lines leading to boilers, blowers, compressors, or other possible sources of combustion. Working in conjunction with a flame arrester, the shut-off valve protects low-pressure waste gas systems by shutting off the gas flow if a fire is burning in the piping system. When gas is no longer supplied at the source of combustion, the fire is extinguished.

FEATURES

• Fusible element and spring
• Sight glass with indicator rod
• Gas-tight fuse plug

VAREC BIOGAS™ 440 PRESSURE RELIEF AND FLAME TRAP ASSEMBLY

The Varec Biogas™ 440 Pressure Relief and Flame Trap Assembly controls upstream pressure while protecting vapor recovery systems and waste gas piping systems from flashback fires. It combines the Varec Biogas™ 386 Back Pressure Relief Valve and the Varec Biogas™ 5010 Flame Arrester with a thermal shut-off bypass valve integrated into the unit.

FEATURES

• Large diaphragm
• Spring-loaded
• Easily adjustable setting
• Removable/replaceable bank assembly
• Spring-actuated thermal valve
• Optional three-way solenoid valve option
• Optional NPT drain plug

VAREC BIOGAS™ 450 FLAME TRAP ASSEMBLY

The Varec Biogas™ 450 Flame Trap Assembly, a combination of the 430 Thermal Operated Shut-Off Valve and 5000/5010 Flame Arrester, is used on lines to flares and fired process units to safely prevent a flame flashback. Its extensive size range makes it ideal for applications in tank farms, liquid storage facilities, landfills, or wastewater treatment systems.

FEATURES

• 2-inch to 12-inch (50 mm to 300 mm) sizes
• Spring-actuated thermal valve
• Removable/replaceable bank assembly

VAREC BIOGAS™ 5200 FLAME CHECK

The Varec Biogas™ 5200 Flame Check can be installed on small pilot lines to fuel burning devices in vent piping and diaphragm-operated regulators. This flame check prevents the spread of a flame in the event of a flashback.

FEATURES

• Large net-free area
• 25 psig working pressure
• Pipe union type housing
• Compressed woven-wire element design

VAREC BIOGAS™ 7100B PRESSURE EXPLOSION RELIEF VALVE

The Varec Biogas™ 7100B Pressure Explosion Relief Valve is used on low-pressure storage tanks, sludge digesters, and gas holders to relieve excessive pressure. The valve uses weights proportional to the seat surface area to release pressure directly into the atmosphere.

FEATURES

• 2-inch to 12-inch (50 mm to 300 mm) sizes
• Air cushion seating
• Pressure settings to 2 psig (0.14 barg)
• Leak rate of 1 SCFH (0.03 Nm3/hr) or less at 90% of setpoint
• All-weather option