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Ariel offers application specific components, engineered to ensure the performance, safety, and reliability of your acid gas operation. Our recommendations for sour gas service are based upon field experience and NACE guidelines – providing innovative, safe solutions to minimize equipment corrosion often associated with CO2 and H2S contact.
Ariel recommends two compartment guides for sour gas service. These short and long two compartment guides offer a purge and vent system – designed to separate the frame compartment and operator atmosphere from the packing leakage and blow by, keeping the sour gas from entering the crankcase.*Two compartment guides are not available for the JGM: N: P: Q frames.
Ariel offers 17-4PH stainless steel piston rods, chromium-nitrided in the packing travel area for acid gas service with high CO₂ and H₂S content. These heavy duty piston rods reduce the potential for corrosion.
For proper venting, Ariel recommends the use of purge packing for services with high acidic gas components. Ariel’s purge packing blocks and directs hazardous, toxic, flammable, or corrosive gases – preventing exposure to personnel and eliminating damage to the running gear.
Ariel offers cylinder flushing lube for sour gas services with 100 ppm and greater H₂S content, supplying additional distribution blocks so that oil can be injected into the suction nozzle riser of the cylinder.
17-4PH stainless steel valves are recommended for sour gas services with 2% and greater H2S content.
Standard cylinder bolting for sweet and sour gas services consists of Grade 8 valve cap, head end head, crank end head, and packing case cap screws. 17-4PH stainless steel bolts for the valve caps, head end head, crank end head, and packing case bolting are optional.
Standard cylinder body materials:ASTM A278 Grade 40 gray ironASTM A536 Ductile iron 80-55-06ASTM A395 Ductile iron 60-40-18
Ariel offers single and double acting forged steel cylinders that are suitable for H2S content due to the controlled hardness of 22 Rc maximum.
Forged steel cylinder body materials:AISI 4340 Forged steelASTM A668 Class J forged steel
Sour gas service typically requires a special lubrication. Provision is made on all units to use a separate oil source for the cylinder bore and packing.