The AirTAC GFR300-15T AirTAC Filter Regulator NPT1/2 5um Square Gauge is a genuine G-series filter regulator: water separation, 5 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 GFR300-15T is a size-300 filter regulator that removes water and particulate from compressed air and sets downstream pressure in a single body. This configuration has a 1/2 in NPT port, a 5 um filter element (the finer of the two available grades), a differential-pressure drain that bleeds collected condensate automatically whenever the pressure drop across the element rises, and an embedded square gauge scaled in bar for direct setting of the outlet pressure. The standard regulator covers a setting range of 0.15-0.9 MPa (20-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi) and an operating temperature of -5 to 70 C (non-freezing). The polycarbonate bowl suits the 300 size, and no mounting bracket is fitted.
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 in, a choice of 40 um standard or 5 um (W) filtration, differential-pressure, automatic or manual drains, square or round gauges with MPa, psi or bar scales, G or NPT thread options, and bracket or no-bracket mounting. Flow is published as curves rather than a single rating, so we confirm the datasheet and sizing figures on request before you order.
| Model | GFR300-15T AirTAC Filter Regulator NPT1/2 5um Square Gauge |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 5 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 — square, bar 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. |
| 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. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Feeding tool-clamp and chip-clearing actuators on a machining centre: the 5 um element keeps fine particles out of the clamp valves while the regulator holds a steady setting for consistent clamping force.
Air preparation for conveyor diverters, carton sealers and bagger cylinders on a packaging line, where the 1/2 in port serves the larger header and the differential-pressure drain keeps condensate out of the valves.
A point-of-use station on a plant air header serving screwdrivers, presses and grippers in an assembly cell, with the bar-scaled square gauge letting operators verify and reset the station pressure at a glance.
Step up or down through the 200/300/400/600 sizes and their ports (here 1/2 in NPT) to match the air demand of the circuit; because flow is published as curves rather than a single rating, ask us to confirm sizing against your application before ordering. Choose the drain to suit access: differential-pressure (this unit) needs no attention between element-service intervals, automatic drains continuously, and manual drains suit supervised points. Pick 40 um for general line protection or 5 um (this unit, code W) where downstream valves and instruments need finer air. Select the gauge scale (MPa, psi or bar - here a square gauge in bar), the thread (PT is the standard; G and NPT are order options, NPT on this unit), and whether a bracket is required (this unit ships without one).
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, not as a single rated figure, so no rated flow number is stated here. Tell us your application and required flow, and we will confirm the sizing against the datasheet curves on request before you order.
The W in the code selects the optional 5 um grade instead of the 40 um standard element. The 5 um element suits circuits with sensitive valves and instruments; the 40 um grade is the standard choice for general line protection. Both grades are available across the GFR300 range in the same body.
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.