The AirTAC GFR30008LC2GK AirTAC Filter Regulator G1/4 Low-Pressure is a genuine G-series filter regulator: water separation, 40 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT1/4" 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 GFR300 series is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This unit, GFR30008LC2GK, is the size 300 model with a G1/4 (BSPP) port, the low-pressure regulator type, a 40 um standard filter element and the differential-pressure drain. It is fitted with a round gauge reading in psi, a reverse (check) valve, and a mounting bracket. The bowl is polycarbonate (PC).
This is a genuine AirTAC part. The GFR family is offered in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, and options including automatic or manual drains, a 5 um element (code W), gauge scales in MPa, psi or bar, and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR30008LC2GK AirTAC Filter Regulator G1/4 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (G (BSPP) thread) |
| Filtering grade | 40 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, psi 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. |
|---|---|
| 08 | Port size PT1/4". 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. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| G | G (BSPP) 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 · PT1/4" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Pneumatic clamps and swing cylinders on machining fixtures often run at reduced pressure to avoid distorting the workpiece. This filter regulator cleans the shop air and holds the reduced setting, while the fitted check valve blocks backflow toward the supply side.
Bench rigs that cycle air cylinders or leak-test parts need clean, low-pressure air. The 40 um element protects the rig's valves, the psi gauge gives a direct readout at the bench, and the drain keeps collected condensate out of the circuit.
Carton formers and case sealers run short-stroke air cylinders at moderate duty. Feeding them through this size 300 filter regulator removes water carried over from the compressor and lets the line set the pressure the sealer needs.
Size and port set the air capacity: 300 is the mid size with a 1/4 in port; step up to 400 or 600 where demand is higher, and match the port to your piping. The regulator here is the low-pressure type (code L), intended where the downstream setpoint sits below the standard range; the exact adjustment range for this variant is not published, so confirm it with us before ordering. The drain is the differential-pressure type; automatic (A) or manual (M) can be ordered. The filter element is 40 um standard, with 5 um (W) available for finer protection. This unit carries a round psi gauge (C2); the embedded square gauge and MPa or bar scales are the alternatives. Thread is G (BSPP); PT is the standard thread and NPT is an order option. A bracket is included. Because flow is published as curves rather than a single rated figure, ask us to check sizing against your application 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 flow for the GFR series as curves, not as a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the datasheet curve and check the sizing for you before you order.
GFR is the filter regulator family, 300 the size, 08 the 1/4 in port, L the low-pressure regulator type, C2 the round gauge with psi scale, G the BSPP thread and K the fitted reverse (check) valve. The drain is the differential-pressure type and the filter element is 40 um.
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.