The AirTAC GFR400-15 AirTAC Filter Regulator PT1/2 5um Manual Drain 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 GFR400-15 is a size 400 filter regulator that cleans compressed air and sets downstream pressure in a single body. Water and particulate are removed by the 5 um filter element (code W, one step finer than the 40 um standard), the manual drain lets an operator bleed collected condensate from the PC bowl on demand, and the standard regulator holds the outlet setting across a 0.05-0.9 MPa (7-130 psi) adjustment range. The embedded square gauge reads in psi, and a mounting bracket is included for panel or wall fixing.
This is a genuine AirTAC part from the GFR range, which spans sizes 200 to 600 with ports from 1/8 to 1 inch, a choice of drain types, 40 um or 5 um filtration, gauge scales in MPa, psi or bar, and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). Flow is published as curves rather than a single rated figure, so ask us to confirm datasheet figures for your application on request.
| Model | GFR400-15 AirTAC Filter Regulator PT1/2 5um Manual Drain |
|---|---|
| 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 | 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, 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 0.05 - 0.9 MPa (7 - 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. 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) |
Feeding clean, regulated air to a carton-sealing or wrapping machine station, where the 5 um element protects directional valves and cylinders from water and fine debris carried in the shop-air supply.
Supplying regulated air to conveyor-mounted clamps and blow-off nozzles, with the manual drain letting maintenance staff clear accumulated condensate during scheduled line checks.
Conditioning compressed air on a test bench or pilot rig, where the 5 um grade and a psi-reading square gauge give operators clean air and a direct pressure readout at the bench regulator.
Sizing a GFR unit starts with the port step: this size 400 model carries a PT1/2 port, the right choice where line flow demand sits above what a 3/8 in size 300 unit serves - we can check the published flow curves against your consumption before you order. Downstream choices are all yours to set: manual drain (this code) for supervised installations, automatic or differential-pressure drain where condensate must leave without an operator; 5 um filtration (this code) for finer protection versus the 40 um standard; gauge scale psi (this code) or MPa/bar; and PT as the standard thread with G (BSPP) or NPT available as order options. A bracket is included. Because AirTAC publishes flow as curves and not a single rating, 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 GFR400 series as curves rather than a single rated figure, so we do not state one number. Send us your inlet pressure and required downstream consumption and we will confirm the flow figures from the datasheet on request before you order.
The manual drain (code M) means an operator opens the drain to release collected condensate, which suits supervised installations; automatic and differential-pressure drain options exist for unattended duty. This unit carries the 5 um element (code W); the series standard is 40 um, so pick the grade that matches the sensitivity of the equipment downstream.
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.