The AirTAC GFR400-15MLC2WK AirTAC Filter Regulator PT1/2, 5 um 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 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 GFR400-15MLC2WK is a 400-size filter regulator: water and particulate filtration plus pressure regulation in a single body, with a PT1/2 (1/2 in) PT-threaded port. This configuration carries the W-grade 5 um filter element for finer particle capture than the standard 40 um element, a manual drain so the bowl is emptied by hand on your schedule, the low-pressure regulator type for circuits that run below standard line pressures, a round external gauge reading in psi, and a built-in reverse/check valve that helps hold the downstream circuit if upstream supply drops. A mounting bracket is included, and the polycarbonate bowl suits non-freezing compressed-air service.
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, and is ordered with your choice of drain type (differential-pressure, automatic or manual), filter grade (40 um standard, 5 um optional), gauge style and scale (MPa, psi or bar), thread (PT standard, G and NPT as order options), and bracket. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application.
| Model | GFR400-15MLC2WK AirTAC Filter Regulator PT1/2, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (PT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual 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. 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.
| 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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. |
| 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. |
| 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 | GFR400 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Feeding clamping cylinders on a CNC fixture: the 5 um element keeps fine particles out of the clamp valves, the regulator holds a steady low setpoint for consistent clamp force, and the check valve helps the circuit hold if shop air dips mid-cycle.
A single conditioned drop for the extend/retract cylinders on a carton packaging conveyor: filtered and regulated air at the machine, a psi gauge the operators can read at a glance, and a manual drain emptied during scheduled line cleaning.
Regulated, finely filtered air for instrument air on a laboratory or QC test bench where the process runs at reduced pressure: the low-pressure type suits the low setpoint, and the 5 um element protects sensitive pneumatic instrumentation.
Step up or down through the GFR sizes (200/300/400/600) so the port and body match the flow your line needs; this 400 unit takes PT1/2. Choose the drain to match maintenance practice: manual (this unit) drains the bowl by hand, automatic drains continuously, and the differential-pressure default drains on a pressure drop. Pick the 5 um W element when downstream equipment needs finer filtration than the 40 um standard; note the trade is more frequent element attention. Select gauge style and scale - this code specifies the external round gauge in psi; embedded square gauges and MPa/bar scales are alternatives. Thread is PT as standard, with G (BSPP) and NPT as order options; a bracket is included with this code.
One honest routing note: AirTAC publishes flow as curves, not a single rated number, and the low-pressure type's exact adjustment band is not stated on the summary sheet. Send us your line pressure, setpoint and air demand and we will confirm sizing and the adjustment range against the datasheet 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 GFR flow as performance curves, not as a single rated figure, so we will not quote you a made-up number. Tell us your line pressure, setpoint and air demand and we will confirm the flow curve and sizing from the datasheet on request before you order.
W is the fine filter grade: a 5 um element instead of the 40 um standard. Choose 5 um when downstream valves, cylinders or instruments need finer particle capture; the standard 40 um element remains available on other GFR codes if coarser protection is sufficient.
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.