The AirTAC GFR400-15 AirTAC Filter Regulator PT1/2, 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 GFR400-15 is a size-400 filter regulator that removes water and particulate from compressed air and sets a stable downstream pressure in one body. This configuration is a 1/2 in PT-threaded unit with the fine 5 um filter element (code W), a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element is high enough, and an external round pressure gauge reading in psi. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi) and a working temperature of -5 to 70 C (non-freezing). The polycarbonate bowl suits the 400 size, and no mounting bracket is fitted on this version.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, a choice of 40 um standard or 5 um fine filtration, differential-pressure, automatic or manual drains, square or round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Because flow is published as curves rather than a single rated figure, we confirm the datasheet and sizing figures for your application on request.
| Model | GFR400-15 AirTAC Filter Regulator PT1/2, 5 um, Round Gauge |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (PT 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 | 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.
| GFR400 | G-series filter regulator, 400 body — sets the port range. |
|---|---|
| 15 | Port size PT1/2". This body offers 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. |
| (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 | GFR400 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Clean, regulated air ahead of the machine tool's solenoid valves and pneumatic clamps: the 5 um element protects fine spools from particles while the regulator holds a steady setting for consistent clamping force.
Supply point for carton sealers, label applicators and bagging machines, where the differential-pressure drain keeps condensate out of the sealing cylinders during long shifts without an operator draining bowls.
Filtered, pressure-set air for pick-and-place cylinders and air grippers on a robotic assembly cell, with the round psi gauge letting technicians verify and document the set pressure in psi.
Size 400 with a 1/2 in PT port suits lines where larger actuators, multiple take-offs or higher air demand call for the bigger step in the range; step down to 300 or up to 600 according to the flow your circuit needs. Choose the 5 um element (this model) when downstream valves, cylinders or instruments are sensitive to finer particles; the 40 um standard element is the usual choice for general supply. The differential-pressure drain on this unit discharges condensate automatically as the element loads, so no daily manual draining is needed. The round psi gauge matches instruments and drawings specified in psi; square gauges and MPa or bar scales are order options. PT is the standard thread, with G and NPT available to order, and brackets can be added if panel or wall mounting is required. Flow for this family is published as curves rather than a single rated number, 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. 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 GFR family 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 and the right size against your required flow on request.
The W code selects the fine 5 um filtration grade instead of the 40 um standard element, which suits downstream valves and instruments that are sensitive to finer particles. The C2 code fits the optional external round gauge with a psi scale; the embedded square gauge with MPa, psi or bar scales remains available as an alternative.
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.