The AirTAC GFR300-15 AirTAC Filter Regulator, G1/2, 5 um, Round 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 GFR300-15 is a 300-size filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries a G1/2 (BSPP) port, a 5 um filter element (the finer of the two catalogue grades), a differential-pressure drain that bleeds condensate automatically whenever the pressure differential across the element is high enough, and a fitted reverse/check valve that holds downstream pressure when the supply is cut. The round external gauge on this unit reads in psi, and the standard regulator type covers an adjustment range of 0.15-0.9 MPa (20-130 psi). Maximum inlet pressure is 1.0 MPa (145 psi), and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits the 300 size; only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part from the GFR family, which spans 200, 300, 400 and 600 sizes with port options from 1/8 to 1 inch, PT as the standard thread and G or NPT as order options, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, and gauge choices. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures on request before you order.
| Model | GFR300-15 AirTAC Filter Regulator, G1/2, 5 um, Round Gauge |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (G (BSPP) 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 — round, psi 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 0.15 - 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). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| G | G (BSPP) 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Feeds filtered, regulated air to the clamping cylinders and fixtures on a machining centre, where the 5 um element protects the clamping valves from fine particles and the check valve holds clamp pressure if the shop air drops.
Supplies regulated air to the diverters, pushers and gripper cylinders on a carton or bottle packaging line, with the differential-pressure drain keeping condensate out of the valves during continuous shifts.
Conditions the air feeding pneumatic test rigs and laboratory bench setups, where the 5 um grade and a stable, gauge-monitored regulated pressure protect sensitive instruments and reference circuits.
Size and port: the 300 series steps up from the 200 series in both port size and flow capacity, so match the size to the air demand of the circuit; this unit is the 1/2 in (G1/2) port version of the 300 frame. Filtration: choose 5 um (this unit, code W) when downstream valves, cylinders or instruments are sensitive to fine particles, and 40 um where coarser protection is enough. Drain: the differential-pressure drain here needs no daily attention, while automatic and manual drains are the other catalogue choices. Gauge: this unit carries the external round gauge with a psi scale; embedded square gauges and MPa or bar scales are the alternatives. Thread: G (BSPP) as coded here, with PT standard and NPT available to order. This unit has no mounting bracket (code J).
Sizing honesty: AirTAC publishes flow for this family as curves, not as a single rated number, so we do not quote a flow figure here. Send us your application's air demand and line pressure and we will confirm the correct size and datasheet figures before you order.
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 capacity curves rather than a single rated figure, so we do not quote a number here. Tell us your application's air demand and working pressure and we will confirm the correct size against the datasheet curves on request before you order.
The W in the code GFR30015JC2WGK selects the 5 um filter element instead of the 40 um standard, for finer protection of downstream components. The K selects a fitted reverse/check valve, which holds downstream pressure when the upstream supply is shut off. Both are catalogue options on the GFR300 frame.
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.