The AirTAC AirTAC GFR300-15LC1T Filter Regulator NPT1/2 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 PT1/2" 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 GFR300-15LC1T is a 300-size filter regulator that removes water and particulate from compressed air and sets downstream pressure in a single body. This configuration is a low-pressure type regulator for circuits that run below standard regulating ranges, with a 40 um standard filter element, differential-pressure drain on the PC bowl, and a round pressure gauge scaled in MPa. It is threaded NPT1/2 (1/2 in) and includes a mounting bracket.
This is a genuine AirTAC part. The GFR series is offered in sizes 200, 300, 400 and 600, with port options from 1/8 in to 1 in, PT/G/NPT threads, manual or automatic drain choices, a 5 um (W) filter element option, gauge and scale choices, and an optional reverse/check valve. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures on request.
| Model | AirTAC GFR300-15LC1T Filter Regulator NPT1/2 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT 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, MPa scale |
| Reflux valve | Not fitted |
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. |
|---|---|
| 15 | Port size PT1/2". 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. |
| (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. |
| (blank) | No reverse-flow valve (the default). |
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 · PT1/2" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
A low-pressure type filter regulator feeds clamp cylinders on a fixture line where the clamping pressure must sit well below normal line pressure, with filtered air protecting the clamp valve seats.
Mounted ahead of the sealer's directional valves and cylinders, this 1/2 in unit filters water and swarf from the shop-air main and holds a steady, reduced supply pressure for consistent box actuation.
On weaving and spinning frames that run air jets and tension rollers at reduced pressures, the low-pressure regulator gives finer control than a standard unit, while the 40 um element and auto differential drain keep condensate out of the nozzles.
Start with the size and port: the 300 size with 1/2 in NPT port suits lines where larger-bore supply air feeds the unit, and the next step up (400) or down (200) changes both port and flow capacity. Choose the drain to match maintenance access: differential-pressure drain (this model) bleeds automatically with flow, automatic (A) drains even at no flow, and manual (M) is emptied by hand. Pick the 40 um standard element for general air preparation or the 5 um (W) element for finer protection; note that a low-pressure type (L) regulator is the right choice only when the circuit runs below standard regulating ranges. Gauge style and scale (square or round; MPa, psi or bar), thread (PT standard, G or NPT to order) and bracket are all decodable from the code.
Because flow is published as curves and not a single rating, 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. Without the K option, air cannot flow back 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 there is no one figure we can honestly quote for this 300-size, 1/2 in unit. Tell us your application and we will confirm the flow and sizing data from the datasheet on request before you order.
The L marks the low-pressure type regulator, intended for circuits that run below standard regulating ranges; the exact range for the low-pressure type is not published in the catalogue, so we confirm it on request. C1 means the gauge option is the external round gauge scaled in MPa (the embedded square gauge is standard, with psi or bar scales 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.