The AirTAC GFR300-15MJF3TK AirTAC Filter Regulator 1/2 in NPT 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 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 GFR300-15MJF3TK is a 300-size filter regulator that cleans compressed air and holds downstream pressure in a single body. It removes water and particulate with the standard 40 um element, regulates outlet pressure across 0.05-0.9 MPa (7-130 psi), and carries a manual drain so the bowl is emptied by hand on your schedule. The embedded square gauge reads in bar, a reverse/check valve is fitted to hold downstream pressure if the supply drops, and the 1/2 in NPT port suits main air drops on larger machines.
This is a genuine AirTAC part from the G-series range, which spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, G (BSPP) and NPT threads alongside the PT standard, automatic, manual or differential-pressure drains, and a 5 um element where finer filtration is needed. Flow is published as curves rather than a single rating, so ask us to confirm datasheet figures for your application.
| Model | GFR300-15MJF3TK AirTAC Filter Regulator 1/2 in NPT |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, bar 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. Standard type, regulating 0.05 - 0.9 MPa (7 - 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 3 | Gauge scale: bar. 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 · PT1/2" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Clean, regulated air feeding tool-change cylinders and clamping fixtures on a machining centre, with the check valve holding clamp pressure through brief supply dips.
A main-air drop on a carton-forming and sealing line, where the 40 um element protects directional valves and the regulator keeps wrapper-tension cylinders consistent.
Filtered, pressure-controlled air for a lab automation skid's grippers and pinch valves, with the bar-scale square gauge giving operators a local setpoint reference.
Size 300 with a 1/2 in NPT port sits in the middle of the G-series flow ladder: step up to 400/600 or down to 200 depending on the pipe run and the air your machine draws - we can confirm sizing against the published flow curves before you order. This unit pairs a manual drain (simple, no air loss, but someone must bleed the bowl) with the standard 40 um element; choose the W code for 5 um where finer protection is needed. The square gauge reads in bar; MPa and psi scales and an external round gauge are alternatives. Thread is NPT here, with G (BSPP) and PT available to order, and note this configuration ships without a mounting bracket (J code) - add one if the unit will not hang on the pipe.
Because flow is published as curves rather than a single rated figure, send us your application details and we will confirm the datasheet numbers before you commit.
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 as curves rather than a single rated figure, so we do not quote a l/min or SCFM number. Send us your application details and we will confirm the datasheet flow curves and help you check the 300 size against your air demand before you order.
The M code means the polycarbonate bowl is drained by hand, which suits installations visited daily and avoids the small air loss of an auto drain; automatic and differential-pressure drains are available on other codes. The K code adds a reverse/check valve, so downstream pressure is held if the upstream supply is interrupted.
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.