The AirTAC GFR300C08MLJC2WT AirTAC Filter Regulator NPT1/4, 5 um 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 GFR series is a filter regulator: it removes water and particulate from compressed air and reduces pressure to a set working level in a single body. This configuration, GFR300C08MLJC2WT, is the size 300 unit with a 1/4 in NPT port, a metal bowl with manual drain, a 5 um filter element (the W grade, finer than the 40 um standard), the low-pressure regulator type, and an external round gauge reading in psi. No mounting bracket is fitted and no reverse/check valve is included. Maximum inlet pressure is 1.0 MPa (145 psi); operating temperature is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family is made in four sizes (200, 300, 400 and 600) covering ports from 1/8 in to 1 in, with a choice of drain type, filter grade, gauge style and scale, thread (PT standard; G and NPT to order) 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 | GFR300C08MLJC2WT AirTAC Filter Regulator NPT1/4, 5 um |
|---|---|
| Series | GFR300 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.
| GFR300 | G-series filter regulator, 300 body — sets the port range. |
|---|---|
| C0 | Port size See datasheet. 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. |
| (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 | GFR300 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C0 (two-unit set) |
Fitted at the drop feeding clamps and small actuators on a stamping press cell: the 5 um element catches pipe scale and water carryover, while the regulator holds a low working pressure at the point of use and the round psi gauge shows the set point.
On a leak or cycle test bench, the low-pressure regulator type lets technicians set a reduced supply pressure for the bench circuit, the 5 um grade protects the instrumentation downstream, and the manual drain is opened between test sessions.
At a paint booth, spray guns need clean air at a low setting: this unit filters to 5 um and regulates down to the gun's working pressure, with the metal bowl's manual drain cleared at the end of each shift.
The real choices on this family are all decodable from the code. Step the size (200/300/400/600) to match the port and the flow your line needs - this unit is size 300 with a 1/4 in NPT port. Choose the drain: manual (as here, drained by hand at shut-down), automatic, or differential-pressure. Choose the element: 40 um standard or 5 um (W) for finer protection - this unit carries the 5 um grade. The low-pressure (L) regulator type suits circuits set well below standard working pressure; its exact adjustment range is not published, so confirm it with us. Gauge options are the embedded square gauge or an external round gauge in MPa, psi or bar scales (here: round, psi). Thread is PT as standard with G and NPT as order options; brackets are optional. Flow is published as curves, 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 GFR flow as curves, not a single rated figure, so we do not quote a number here. Send us your line pressure, set pressure and the air demand of your equipment, and we will confirm the sizing from the datasheet on request.
Manual drain means you open the bowl drain by hand at shut-down to expel collected water - a good fit for shifts with a fixed stop, where an automatic or differential-pressure drain is not required. The W code is the 5 um filter element, finer than the 40 um standard, for better protection of downstream tools and instruments.
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.