The AirTAC GFR400C15MLF2K AirTAC Filter Regulator PT1/2 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 See datasheet 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 GFR400C15MLF2K is a filter regulator: one body removes water and particulate from compressed air and holds the downstream pressure at your set point. This size 400 unit is built around a 1/2 inch PT port, drains by hand through its manual drain, carries the standard 40 um filter element, and is the low-pressure type for circuits whose working pressure sits below the standard version's range - we confirm the exact adjustment range for this variant on request. A square pressure gauge reading in psi is fitted, a reverse/check valve is installed, a mounting bracket is included, and the polycarbonate (PC) bowl suits a maximum inlet pressure of 1.0 MPa (145 psi) over an operating range of -5 to 70 C (non-freezing).
This is a genuine AirTAC part. GFR filter regulators are made in four sizes (200, 300, 400 and 600) covering ports from 1/8 to 1 inch, with manual, automatic or differential-pressure drains, 40 um or 5 um (W) filtration, square or round gauges in MPa, psi or bar scales, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so send us your application and we will confirm the figures from the datasheet before you order.
| Model | GFR400C15MLF2K AirTAC Filter Regulator PT1/2 Low Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 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 — factory standard, Factory standard 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. |
|---|---|
| C1 | Port size See datasheet. 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-C1 (two-unit set) |
Feeding clamps and swing cylinders on a CNC cell: the 40 um element strips water and condensate before it reaches the valves, while the regulator holds a steady set pressure on the 1/2 inch supply and the check valve backs the circuit if the main air dips.
A 1/2 inch drop feeding carton closers and pick-and-place cylinders on a packaging line, where the manual drain is cracked at shift start and the psi gauge gives operators a visible, repeatable set point.
Regulating filtered air to a lab test rig or pilot skid, where the low-pressure type matches modest set pressures, the square psi gauge supports manual logging, and the 1/2 inch PT connection ties into the rig's air header.
Choose the size by the port and flow your line needs: size 400 with a 1/2 inch PT port sits mid-range in the GFR family, which steps from 1/8 inch (size 200) to 1 inch (size 600). Drain is a real choice: this unit drains manually, which suits positions that are visited daily, while automatic and differential-pressure drains suit unattended installations. Filtration is the standard 40 um element; specify the W option for 5 um where finer particle capture matters. The fitted square gauge reads in psi; round external gauges and MPa or bar scales are order options. Thread here is PT, the standard; G (BSPP) and NPT are order options. A bracket is included. Because AirTAC publishes flow as curves, not a single rated figure, ask us to check the curves against your air demand 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 GFR400 flow as performance curves rather than a single rated figure, so we do not quote a number here. Send us your line pressure, set pressure and air demand, and we will confirm the sizing from the datasheet on request.
This configuration uses a manual drain: condensate is released by hand, which suits positions that are visited daily. The same size 400 filter regulator is available with automatic or differential-pressure drains for unattended installations - just ask when ordering.
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.