The AirTAC GFR30008MLJNTK AirTAC Filter Regulator 1/4 NPT 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 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 combines water and particulate filtration with pressure regulation in a single body, so one unit both conditions the compressed air and sets the working pressure downstream. This GFR30008MLJNTK is configured with a 1/4 in NPT port, a manual drain for emptying the PC bowl, the standard 40 um filter element, and the low-pressure regulator type for circuits that run at reduced set pressures. A reverse/check valve is fitted, and no gauge or mounting bracket is supplied. 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 GFR300 frame is one of four sizes (200, 300, 400 and 600) with a choice of PT, G or NPT thread, differential-pressure, automatic or manual drain, a 40 um or 5 um (W) element, gauge and bracket options, and a reverse/check valve. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application.
| Model | GFR30008MLJNTK AirTAC Filter Regulator 1/4 NPT Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Not fitted |
| 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| N | No pressure gauge (N). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 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 · PT1/4" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Sits ahead of the clamp valves to filter the shop air and regulate it down to the reduced set pressure the clamping cylinders need, with the fitted reverse/check valve in the line.
Conditions the booth's air feed and regulates it to the lower set pressures spray equipment runs at, while the 40 um element catches pipe scale and water carryover before the gun.
Feeds filtered, regulated air to the cylinders that divert, clamp and eject packs along the conveyor, with the manual drain used for end-of-shift bowl checks.
Choose the frame by the port and flow step: 200, 300, 400 or 600, with ports from 1/8 in up to 1 in as the frame grows; this unit is the 300 frame with a 1/4 in NPT port. Drain choice matters in service: a manual drain (this unit) is emptied by hand when water collects, while automatic and differential-pressure drains empty themselves. The 40 um element is the standard grade and the W option gives 5 um for finer protection. Gauge, scale, bracket and thread (PT is the standard; G and NPT are order options) are all decodable choices, and this configuration carries no gauge and no bracket. Flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
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 GFR300 series as curves rather than a single rated figure, so we do not quote a number here. Tell us your inlet pressure and the flow your application needs, and we will confirm the sizing from the datasheet on request.
The M in the code means the PC bowl is drained by hand: open the drain whenever collected water needs removing, rather than relying on an automatic mechanism. Automatic and differential-pressure drain versions of the same GFR300 size are available if you would prefer self-draining operation.
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.