Type 300 Instrument Air Filter Regulator

Clean, accurate air pressure under harsh conditions

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.  

The Type-310 NACE Filter Regulator 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.

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.


Port Size In/Out/Gauge: 1/4" NPT In/Out/Gauge/Exhaust: 1/4" NPT In/Out/Gauge: 1/4" NPT
Output Ranges 0-10 psig (0-0.7 BAR), 0-30 psig (0-2 BAR), 0-60 psig (0-4 BAR), 0-120 psig (0-8 BAR) 0-30 psig (0-2 BAR), 0-60 psig (0-4 BAR), 0-100 psig (0-7 BAR) N/A
Maximum Supply Pressure 250 psig (17 BAR)
Mounting Pipe or through body direct Pipe or through body direct Pipe or through body direct
Filter 40 micron (optional 5 micron)
Flow Capacity 22 scfm (660 Nl/min)at 100 psig (7 BAR) supply with 20 psig(1.4 BAR) output 20 scfm (566 Nl/min)at 100 psig (7 BAR) supply with 20 psig(1.4 BAR) output Consult Factory
Exhaust Capacity 0.1 scfm (3 Nl/min) with downstream pressure 5 psig (0.3 BAR) above set point N/A
Sensitivity 1" of water N/A
Air Consumption Less than 5 scfh (2.5 Nl/min) N/A
Effect of Supply Pressure Variation Less than 0.2 psig (0.01 BAR) for 25 psig (1.7 BAR) change N/A
Temperature Limits

0° to 160° F (-18° C to 71° C)

Low Temperature Option (J): -62° to 194° F (-52° to 90° C)

-20° to 180° F (-29° C to 82° C)
Low Temperature Option: -69° to 194° F (-52° to 51° C)
-20° to 150° F (-29° C to 66° C)
Low Temperature Option: -62° to 194° F (-52° to 90° C)
Weight 1.6 lb (0.73 kg) 1.3 lb (0.60 kg)

Ordering Information

TypeModel NumberPort Size (NPT)Output Range
(psi) (BAR)
Filter Regulator 300-BD 1/4" 0-10 0-0.7
Filter Regulator 300-BA 1/4" 0-30 0-2
Filter Regulator 300-BB 1/4" 0-60 0-4
Filter Regulator 300-BC 1/4" 0-120 0-8
NACE Filter Regulator 310-BA 1/4" 0-30 0-2
NACE Filter Regulator 310-BB 1/4" 0-60 0-4
NACE Filter Regulator 310-BC 1/4" 0-100 0-7
Filter Only 320-BX 1/4" - -

OPTIONS - Add proper letter onto end of model number:

**E - Tapped Exhaust: allows captured exhaust. 1/4" NPT port.

F - 5 Micron Filter: standard 40 micron filter is replaced with 5 micron filter for more complete air filtration.

***J - Low Temperature: temperature range -62° to 194° F (-52° C to 90° C).

*K - Knob: to replace square head adjust screw.

N - Non-Relieving: for constant flow or downstream pressure relief applications.

**P - Panel Mount: option allows panel mounting. See dimensional drawing.

S - Stainless Steel Adjust Screw: hexhead stainless steel adjust screw for maximum corrosion resistance.

*T - Tamperproof Cover: prevents casual adjustment of output pressure.

**V - Viton® Elastomers: used where elements in the supply air are particularly destructive to standard Buna-N pintle and diaphragm material.

X - ATEX: 94/9/EC

*   Options for Type-300 only.

**  Standard features for Type-310 NACE.

***  Low Temperature Option not available for Type-310 NACE


Mounting Bracket: - P/N: 446-707-028

Pressure Gauge - 1/4" NPT back-mount, 2" face

0-15 psi P/N: 446-725-003

0-30 psi P/N: 446-725-004

0-60 psi P/N: 446-725-001

0-160 psi P/N: 446-725-002