The AirTAC GFR30010LC3WTK AirTAC Filter Regulator 3/8 in NPT is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT3/8" ports, a differential-pressure drain and regulates 0.15 - 0.9 MPa (20 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR30010LC3WTK is a filter regulator: one body that removes water and particulate from compressed air and then regulates downstream pressure. This size 300 unit is ported 3/8 in with NPT thread, carries the W code 5 um filter element for finer filtration than the standard 40 um grade, and uses the differential-pressure drain, which bleeds collected condensate automatically whenever the pressure differential across the element is high enough - no daily manual draining on lightly loaded lines. It is the L low-pressure type, so it is set up for circuits that run below standard regulating ranges, and the K code means a reverse (check) valve is fitted so downstream pressure is held if the upstream supply drops. The C3 gauge code gives you the external round gauge with a bar scale, the polycarbonate bowl suits the 300 size, and the mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, in PT as standard and G or NPT to order, with a choice of drain type, filter grade, gauge style and scale, low-pressure or standard regulator type, and check valve. Flow is published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR30010LC3WTK AirTAC Filter Regulator 3/8 in NPT |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure type |
| Adjusting mechanism | Balanced type |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -5 to +70 °C (unfreeze) |
| Drain type | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, bar scale |
| Reflux valve | Fitted (reverse flow permitted) |
Specifications follow the official AirTAC G-series air-preparation data. The regulating band is set by the drain type: automatic and differential-pressure drains regulate 0.15 - 0.9 MPa, a manual drain regulates 0.05 - 0.9 MPa. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. Air must not freeze in the unit. Flow curves, weight and outline dimensions are not published in our data set — ask us and we will confirm from the factory datasheet.
| GFR300 | G-series filter regulator, 300 body — sets the port range. |
|---|---|
| 10 | Port size PT3/8". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
Field order is size, port, drain, type, bracket, gauge, shape, scale, grade, thread, reflux — a blank position takes the default. Example: GFR300-08 is a 300 body, PT1/4", differential drain, standard type, bracket included, gauge fitted, 40 µm, PT thread, no reflux valve.
A larger body carries a larger port and holds set pressure better as flow rises. AirTAC publishes flow only as curves, so size the body from your peak demand with headroom. The GFR600 uses an aluminium-alloy bowl; the 200, 300 and 400 bodies use PC.
| This model | GFR300 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
On an assembly-line fixture where pneumatic clamps must be held at a deliberately low setpoint, the low-pressure regulator type sets the holding pressure while the 5 um element keeps sludge and scale out of the clamp cylinders, and the check valve holds the clamp if supply pressure dips.
Feeding positioners and pilot-operated process valves on a plant line, where fine 5 um air protects small internal orifices, the bar-scale round gauge gives operators a direct local pressure readout, and the differential-pressure drain keeps condensate off the instrument supply.
At a spray booth, the regulator sets gun atomising pressure with the round bar gauge in view of the operator, the 5 um grade reduces water and particulate carry-through to the finish, and the included bracket mounts the unit at the booth wall for easy adjustment.
Size and port step up together: 200 for 1/8-1/4 in lines, 300 for 3/8-1/2 in, 400 for 1/2-3/4 in, 600 for 3/4-1 in, with larger sizes moving more air. This unit is the 300 body on a 3/8 in NPT port. The W code selects the 5 um element where downstream equipment - valves, cylinders, spray or instrumentation - needs finer air than the standard 40 um grade. The differential-pressure drain suits lines that run often enough for the pressure differential to self-purge the bowl; if the unit sits idle for long stretches, ask about the automatic or manual drain variants. The low-pressure (L) type is the right pick when your setpoint sits below what a standard regulator targets; the exact low-pressure range is not published, so confirm it with us. Gauge scale is selectable (MPa, psi or bar) - this code carries the round gauge on bar. Thread is NPT here; PT is the catalogue standard and G is also orderable. Bracket is included. Because flow is published as curves rather than a single rated figure, send us your application and we will confirm sizing against the datasheet before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes GFR flow as curves, not as a single rated number, so we do not quote a figure that could mislead your sizing. Tell us your line pressure, setpoint and the equipment you are feeding, and we will confirm the relevant flow figures from the datasheet on request before you order.
The W code selects the optional 5 um element instead of the standard 40 um grade, for finer removal of water and particulate ahead of sensitive downstream equipment. The K code fits a reverse (check) valve, which holds downstream pressure if the upstream supply is interrupted. Both are decodable choices on the GFR family, and the low-pressure (L) regulator type in this code is intended for circuits regulated below standard ranges.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity, thread type (PT / G / NPT), gauge scale and destination. We confirm price, availability and lead time — usually within 7-8 hours.