Type 300 Air Filter Regulator from ControlAir

ControlAir Type 300 Air Filter RegulatorThe Type 300 Air Filter Regulator is designed to provide clean, accurate air pressure to instruments, valves, and other automatic control equipment. This filter regulator has been proven to provide accurate operating characteristics under variable conditions. Durable materials and a standard epoxy paint finish provide long-lasting corrosion resistance in harsh industrial environments. The Type 300 AFR is a quality unit that is ideal as an economical alternative for control of process applications. For the NACE MR-01-75 complaint option, see our Type 310 air filter regulator.

Features

Type 300 Air Filter Regulator Features

  • Corrosion-Resistant and NACE Compliant Construction: Types 300 and 320 feature aluminum die-castings, finished with chromate and baked epoxy. Materials in the Type 310 meet NACE MR-01-75 requirements.
  • Depth Filter: Units come equipped with a high-capacity 40 micron depth filter housed in a dripwell
  • Two Outlet Connections: Provides piping versatility
  • 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 captured exhaust
     

Specifications

Type 300 Air Filter Regulator Specifications

  • Port Size: 1/4" NPT
  • Output Range: 0-10 psig (0-.7 bar), 0-120 psig (0-8 bar), 0-30 psig (0-2 bar), 0-60 psig (0-4 bar)
  • Flow Capacity (at 100 psig; 20 psig outlet): 22 scfm (623 Nl/min)
  • Exhaust Capacity: 0.1 scfm (2.83 Nl/min)
  • Max. Supply Pressure: 250 psig (17 bar)
  • Air Consumption: Less than 5 scfh (2.5 Nl/min)
  • Ambient Temperature Limits: 0° to 160°F (-18° to 71°C), -62° to 194°F (-52° to 90°C)
  • Cv: 0.4
  • Sensitivity: 1 in. (25.4 mm)
  • Mounting: Pipe, Panel, Bracket, Through Body
  • Filter: 40 micron, 5 micron
  • Weight: 1.6 lb. (0.73 kg)
  • Body Materials: Diecast Aluminum Alloy
  • Other Materials: Sintered Polyethylene, Nitrile Elastomer, Nylon Fabric, Brass, Zinc Plated Steel, Acetal

Products

Type 300 Air Filter Regulator Products

ControlAir Type 300 Filter RegulatorType 300 Filter Regulator

The Type 300 Instrument Air Filter Regulator is designed to provide clean, accurate air pressure to instruments, valves, and other automatic control equipment. This filter regulator has been proven to provide accurate operating characteristics under variable conditions. Durable materials and a standard epoxy paint finish provide long-lasting corrosion resistance in harsh industrial environments. The Type 300 is a quality unit that is ideal as an economical alternative for control of process applications.

 


ControlAir Type 310 NACE FilterType 310 NACE Filter

This unit incorporates all of the operating features of the Type 300 filter regulator, but is constructed of materials that meet NACE specification #MR-01-75 for sulfide stress cracking. Designed specifically for corrosive sour gas environments, the Type 310 NACE is ideal for oil field applications.

 


ControlAir Type 320 FilterType 320 Filter

The Type 320 Filter unit is a 40-micron depth filter that removes dirt, moisture, and other particles from air and gas lines. Robustly constructed of die-cast aluminum with a baked epoxy finish, this unit stands up in corrosive operating conditions. This filter is an economical alternative for air supply line applications that don't require a pressure-reducing regulator.

Q & A

Q&A Section with Expand/Collapse Icons

Type 300 Air Filter Regulator Q & A

+ What specifications does the Type 300 support, and how do I know they match my application?
The ControlAir Type 300 features a ¼-inch NPT port size, a maximum supply pressure of 250 psig, and output ranges up to 120 psig. It provides about 22 scfm flow capacity at 100 psig inlet and 20 psig outlet, with a standard temperature range of 0°F to 160°F and an extended low-temperature option down to –62°F. The standard filter element is 40 micron, with an optional 5 micron filter available. To ensure a proper match, verify your system’s pressure, flow, and ambient conditions align with these specifications and choose the appropriate filter rating for your air quality needs.
 
+ What materials and environmental options are available, and are they suitable for harsh conditions?
The Type 300 is built with a die-cast aluminum body, epoxy-painted for corrosion resistance, and includes durable internal components such as nitrile elastomers and zinc-plated steel. Options include Viton® seals for chemical resistance, stainless-steel adjustment screws for corrosive environments, a low-temperature version for cold climates, and ATEX-certified models for hazardous locations. These options make the Type 300 suitable for most industrial, outdoor, and process-control environments when properly configured.
+ What filter element should I choose, and how often should maintenance be done?
The standard 40 micron filter is sufficient for most industrial air systems, while the 5 micron version is ideal for applications requiring very clean air, such as precision instrumentation. Finer filters clog more quickly, so regular maintenance is important. Inspect the filter bowl frequently, drain condensate as needed, and replace or clean the element according to system use and air quality—typically on a monthly or quarterly basis. Proper maintenance prevents pressure drop, contamination, and regulator instability.
 
+ How is the Type 300 installed, and are there specific accessories required?
The Type 300 installs easily with ¼-inch NPT connections and supports pipe, panel, or bracket mounting. A pressure gauge on the outlet side is recommended for accurate regulation, and ControlAir offers compatible gauges and mounting brackets. Follow standard plumbing practices, use proper sealing tape or compound, and ensure a clean, dry air supply to extend the regulator’s life. Mount the unit where it’s accessible for monitoring and draining to maintain consistent performance.  
 
 
+ When is the Type 300 the right choice, and when should another model be considered?
The Type 300 is ideal for general industrial pneumatic systems needing reliable pressure control, moderate flow, and clean air in a compact, economical design. It performs well in most factory, automation, and process-control applications. However, users requiring higher flow rates, extreme corrosion resistance, specialized certifications, or ultra-precise regulation may need to consider other ControlAir models, such as the Type 310 for NACE-compliant or higher-performance applications.
 


 

Downloads

Download ControlAir Type 300 Series Air Filter Regulator Datasheet

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