Air Filter Regulator Meets NACE Standards for Corrosive Environments


ControlAir Inc. is pleased to announce the Type-310 NACE Air Filter Regulator. This unit was designed specifically to withstand corrosive hydrogen sulfide (H2S) or “sour gas” environments of the oil and natural gas industry. The Type-310 NACE Air Filter Regulator is constructed of materials to meet NACE MR0175 standards and to provide safe, reliable service. Manufacturing and assembly processes are subject to quality control procedures and testing to ensure specification compliance on component products.


The conditions in the oil and natural gas fields can be outright hostile to many common materials as well as hazardous to personnel. This NACE unit features stainless steel trim and internal construction. All external hardware including fasteners, drain valve and adjusting stem as well the internal valve stem are constructed of stainless steel. The Type-310 NACE unit utilizes aluminum body construction which is an economical alternative to filter regulators of all stainless construction. However, this unit ensures that corrosion points of typical filter regulators (adjust stem, drain valve, assembly hardware) receive maximum resistance in demanding sour gas (H2S) environments.


  • STABLE OUTPUT and REPEATABILITY – provides constant control under variable flow rates and supply pressures
  • LOW DROOP AT HIGH FLOW LEVELS – aspirator design helps maintain set pressure at higher flow levels
  •  TIGHT SHUTOFF – a soft, rubberized valve provides a positive shutoff and compensates for dirt and other foreign matter
  • LOW AIR CONSUMPTION – decreases operating cost
  • TAPPED EXHAUST – allows remote venting media (fugitive emissions)

The Type-310 NACE Filter Regulator is designed specifically for use in corrosive sour gas (H2S) environments and provides instrument quality air to valves, pneumatic controllers, transmitters, transducers, valve positioners, air cylinders, and a wide range of pneumatic control systems. The Type-310 NACE is ideal for upstream oil and natural gas production applications as well as petrochemical processing. Other applications include food; pulp and paper; pharmaceutical processing; pollution control; wastewater treatment and research projects.


The Type-310 NACE Filter Regulator is available in 1/4” NPT porting. Output ranges include 0-30 psig, 0-60 psig and 0-100 psig. Maximum supply pressure is 250 psig. Standard mounting allows for pipe or through body. Temperature limits range from -20º F to 180º F (-29º C to 82º C). Flow capacity is 20 scfm at 100 psig supply with 20 psig output. Exhaust capacity is 0.1 scfm with downstream 5 psig above set point. Air consumption is less than 5 scfh. Effect of Supply Variation is less than 0.2 psig for 25 psig change.