The AirTAC GFR300-15 AirTAC Filter Regulator PT1/2 with Round Gauge 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 GFR300-15 is a size-300 filter regulator that removes water and particulate from compressed air and sets downstream pressure in a single body. This configuration is fitted with a 1/2 in PT port, the standard 40 um filter element, and a differential-pressure drain that bleeds collected condensate automatically whenever the pressure drop across the element rises. Regulation covers 0.15-0.9 MPa (20-130 psi), and the external round gauge supplied with this unit reads in psi so operators can set and monitor the outlet pressure at a glance.
This is a genuine AirTAC part. The GFR range spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, optional 5 um (W) elements, automatic or manual drain variants, G or NPT thread options, and gauge scale choices. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application on request.
| Model | GFR300-15 AirTAC Filter Regulator PT1/2 with Round Gauge |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Standard 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 | 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. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). 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)). |
| (blank) | Standard 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. |
| (blank) | PT 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) |
Feeding clean, pressure-set air to a pneumatic press or forming machine, where the 40 um element protects valves and cylinders from water and swarf while the regulator holds the working pressure the tooling was designed for.
Supplying filtered and regulated air to packaging machinery actuators and grippers, with the round psi gauge letting line technicians verify set pressure during changeovers without extra instrumentation.
Conditioning the air feed to an automated assembly cell, where the differential-pressure drain clears accumulated condensate as the element loads and the regulator keeps downstream control valves within their rated pressure.
Start by matching the size-300 / 1/2 in port step to the air demand of the circuit; because flow is published as curves rather than a single rated figure, ask us to confirm sizing against your application before ordering. Choose the drain to suit the installation: differential-pressure (this unit) drains only when the element loads up, automatic drains continuously, and manual suits infrequently attended points. The standard element is 40 um; specify the W code if the downstream equipment needs 5 um filtration. Gauge scale (MPa, psi or bar), thread (PT standard, G or NPT to order) and the included mounting bracket complete the selection.
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 GFR300 series as curves rather than a single rated figure, so no single number would be honest. Send us your application details and we will confirm the datasheet flow curve and sizing for the 1/2 in port on request before you order.
This unit has no drain code, which means the differential-pressure drain: it releases collected condensate automatically when the pressure drop across the 40 um element rises to a set level. It suits lines that run often enough to self-clear; for rarely attended or low-flow points, an automatic (A) or manual (M) drain variant may be the better choice.
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.