The AirTAC GFR30015ALC3TK AirTAC Filter Regulator NPT 1/2 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 PT1/2" ports, a automatic 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 GFR30015ALC3TK is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in one body. This size-300 configuration has a 1/2 in NPT port, an automatic drain that removes collected condensate without manual attention, and the standard 40 um filter element. It is the low-pressure type, so it is intended where regulation in the lower pressure band is required, and it includes a round bar-scale gauge, a built-in reverse/check valve and a mounting bracket. 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 GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, PT as the standard thread and G or NPT as order options, plus choices of drain type, filter grade (40 um standard, 5 um with code W), gauge style and scale, and reverse/check valve. The polycarbonate bowl applies at this size; only size 600 uses an aluminium alloy bowl. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application.
| Model | GFR30015ALC3TK AirTAC Filter Regulator NPT 1/2 Low-Pressure |
|---|---|
| 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, 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. 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". |
| A | Drain: Automatic 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. |
| 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) |
On a CNC machining cell, pneumatic clamps and vises need clean, dry air held at a steady, lower regulated pressure so workholding force stays consistent across every cycle. This filter regulator conditions the supply at the cell and its automatic drain keeps condensate out of the clamp circuit.
On a bottling line, gripper and pick-and-place actuators run continuously and are sensitive to water carryover and pressure drift. Feeding them through this unit filters the air to 40 um, regulates the supply in the lower pressure band, and the reverse/check valve helps hold the circuit stable.
On a coating or finishing line, spray and atomizing stations often run at reduced regulated pressures where a standard-range regulator is coarse. This low-pressure type filter regulator lets the line set a finer lower setpoint while the automatic drain protects the spray hardware from collected water.
Step up or down through the GFR sizes (200, 300, 400, 600) to match the port and flow path your line needs; this unit is size 300 with a 1/2 in NPT port. Choose the drain to suit maintenance practice: automatic (as decoded here) for unattended condensate removal, manual for controlled draining, or the differential-pressure default. Filter grade is 40 um standard; specify code W if the application needs 5 um. Gauge style and scale are decodable choices - the embedded square gauge is standard and an external round gauge is optional, with MPa, psi or bar scales; this configuration carries a round bar-scale gauge. Thread is PT as standard with G and NPT as order options; this unit is NPT. The low-pressure type (code L) is intended where regulation in the lower pressure band is required - confirm the exact low-pressure range with us. 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 GFR series as curves rather than a single rated figure, so we do not quote a rated flow number. Tell us your application and we will confirm the flow data from the datasheet for this size-300, 1/2 in port unit on request.
C is the round external gauge option and 3 is the bar scale, so this unit includes a round gauge reading in bar. The embedded square gauge is the standard fitting, and scales are available as 1 for MPa, 2 for psi and 3 for bar, so you can order the style and scale that match your panel.
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.