Air Filter Regulator meets NACE requirements.

Press Release Summary:

Constructed of materials that meet NACE specification #MR-0175 for sulfide stress cracking, Type-335 NACE Filter Regulator provides constant control under variable flow rates and supply pressures. Unit features output ranges of 0–30, 0–60, and 0–100 psig with max supply pressure of 250 psig. Flow capacity is 20 scfm at 100 psig supply with 20 psig output. Available in ¼ in. NPT porting with integral through-bolt mounting to most valves, regulator is designed for corrosive sour gas environments.

Original Press Release:

Air Filter Regulator Meets NACE Requirements for Corrosive Environments

AMHERST, NH, USA – ControlAir Inc. is pleased to announce the introduction of the Type-335 NACE Filter Regulator. This unit incorporates all of the operating features of ControlAir’s Type-330 Filter Regulator, but is constructed of materials that meet NACE specification #MR-0175 for sulfide stress cracking.


  • NACE COMPLIANT MATERIALS – all materials of construction meet NACE MR-0175 requirements for corrosive resistance
  • INTEGRAL THROUGH-BOLT MOUNTING – to most popular industrial valves
  • STABLE OUTPUT and REPEATABILITY –  provides constant control under variable flow rates and supply pressures 
  • LOW AIR CONSUMPTION – decreases operating cost
  • TAPPED EXHAUST – allows remote venting media
  • 1/4" NPT PORTING – 2 gauge ports
  • COMBINATION OF ALUMINUM BODY and STAINLESS STEEL TRIM – offers lower cost alternative to all stainless steel

The Type-335 NACE Filter Regulator is designed specifically for use in corrosive sour gas 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-335 NACE is ideal for gas and oil field applications.  Other applications include petrochemical processing, both on and offshore; food; pulp and paper; pharmaceutical processing; pollution control; wastewater treatment and research projects.

The Type-335 NACE Filter Regulator is available in 1/4” NPT porting.  Output ranges include 0-30 psig (0-2 BAR), 0-60 psig (0-4 BAR) and 0-100 psig (0-7 BAR).  Maximum supply pressure is 250 psig (17 BAR).  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 (2.83 Nl/min) with downstream 5 psig (0.3 BAR) above set point.  Air consumption is less than 5 scfh.  Effect of Supply Variation is less than 0.25 psig (0.017 BAR) for 25 psig (1.7 BAR) change.  The Type-335 NACE Filter Regulator weights 1.2 lb (.45 kg).

ControlAir Inc. manufactures precision pneumatic and electropneumatic controls.  ControlAir’s markets include process control, semiconductor, printing and converting presses, diagnostic and surgical medical equipment, robotics, quality control, automotive, analyzers, compressors, pumps and paint equipment.  For more information, ControlAir’s website,, offers full product specifications with pdf files, product CAD drawing files, and company profile.

Contact:     Isaac Onigman
ControlAir Inc.
8 Columbia Drive
Amherst, NH  03031 USA
Phone:     603-886-9400
Fax:  603-889-1844

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