The AirTAC AirTAC GFR300-10 Filter Regulator NPT 3/8 in, 5 um 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 GFR30010LC1WTK is a 300-size filter regulator that removes water and particulate down to 5 um and regulates downstream pressure in a single body. This configuration is the low-pressure type, fitted with an external round gauge scaled in MPa, a built-in reverse/check valve that blocks backflow through the unit, and a differential-pressure drain that bleeds condensate from the polycarbonate bowl automatically as pressure changes. Ports are 3/8 in NPT thread, and a mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of drain type, 40 um or 5 um filtration, gauge style and scale, and PT, G or NPT thread. Flow is published as curves rather than a single rating, so ask us to confirm figures from the datasheet for your application.
| Model | AirTAC GFR300-10 Filter Regulator NPT 3/8 in, 5 um |
|---|---|
| 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, MPa 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. |
| 1 | Gauge scale: MPa. 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 a carton-sealing or case-packing line, low-pressure pneumatic clamps and hold-downs need clean, moisture-free air held at a gentle, stable setting. The 5 um element protects the clamp cylinders from particulate, the round MPa gauge gives the operator a clear set-point readout, and the check valve holds the circuit against backflow when upstream supply dips.
Textile stenter and finishing lines run low-pressure air to misting and cooling nozzles where water carry-over ruins the finish. This filter regulator strips condensate and 5 um fines before the nozzles, the low-pressure type regulator suits the gentle supply those nozzles need, and the differential-pressure drain keeps the polycarbonate bowl clear without operator rounds.
On a bottling or canning conveyor, gate and diverter actuators run at low pressures where a standard regulator overshoots. This low-pressure GFR300 feeds them filtered 5 um air, the MPa-scaled round gauge lets technicians verify the set point at a glance, and the reverse/check valve prevents back-drive through the unit when a section is isolated.
Start with the port step: this unit is 300 size with 3/8 in NPT ports - size up to 400 or 600 if your line needs more flow capacity, or down to 200 for compact circuits. This code carries the 5 um element (code W) rather than the 40 um standard, which suits finer protection downstream. The differential-pressure drain is the default and needs no manual attention; automatic (A) or manual (M) drains are available if your duty cycle calls for them. Gauge options are the embedded square gauge or an external round gauge, scaled in MPa, psi or bar - this unit has the round MPa gauge. Thread is NPT here; PT is the standard thread and G (BSPP) is also an orderable option. A bracket is included with this code.
Note that this is the low-pressure type (code L), intended for lower set pressures; its exact regulation range is not published, so confirm your set-pressure band with us before ordering. Flow is published as curves, not a single rating - send us your application and we will confirm sizing against the datasheet.
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 flow for the GFR series as curves, not as a single rated number, so we do not quote a l/min or SCFM figure. Tell us your application and line pressure and we will confirm the sizing from the datasheet curves on request before you order.
The W in the code selects the optional 5 um filter grade in place of the 40 um standard. The finer element suits downstream components that need cleaner air, such as low-pressure actuators, nozzles or sensitive valves. If your circuit does not need fine filtration, the 40 um standard version of the same 300-size unit is also available.
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.