The AirTAC GFR300C08MLJF2WK AirTAC Filter Regulator PT1/4, 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 GFR300C08MLJF2WK is an AirTAC GFR300 filter regulator: a 5 um filter element and a pressure regulator combined in one body, sized for a PT1/4 (1/4 in) port. This configuration is the low-pressure regulator type with a manual drain, a metal bowl, a built-in reverse (check) valve and an embedded square gauge scaled in psi, and it is ordered without a mounting bracket. In use it removes water and particulate from compressed air and lets you set a stable downstream pressure from a single unit.
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 options for drain type, 5 um or 40 um filtration, gauge scale, G (BSPP) or NPT threads and a bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing. Because flow is published as curves rather than a single rating, we confirm the datasheet and sizing figures for your application on request.
| Model | GFR300C08MLJF2WK AirTAC Filter Regulator PT1/4, 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) |
On a robotics assembly cell, the 5 um element keeps water and swarf out of the valve stack and gripper cylinders, while the low-pressure regulator lets the circuit run delicate gripper actuation well below main line pressure. The built-in check valve blocks backflow toward the supply.
Paint-line spray guns need gentle, steady pressure and clean air to protect the finish. This unit filters to 5 um ahead of the guns and regulates down to the low setting they require, with the square psi gauge giving the booth operator a readout at a glance.
Bench manifolds in a test lab run instruments on low-pressure compressed air. The manual drain gives the technician positive control over daily bowl draining, and the psi-scaled square gauge supports repeatable pressure setpoints between sessions.
Every choice in this unit is decodable from the code. Step through sizes 200/300/400/600 and ports 1/8 in to 1 in to match your piping and the flow path your line needs - the larger the size, the larger the port. Drain: this unit is manual (code M), so the bowl is drained by hand; automatic and differential-pressure drains are available elsewhere in the series for unattended operation. Filtration: 5 um here (code W) where 40 um is the standard grade - choose 5 um where downstream valves, cylinders or process quality demand finer air. Gauge: the embedded square gauge is fitted with a psi scale; MPa and bar scales and an external round gauge are order options. Thread: PT is the standard; G (BSPP) and NPT are catalogue options to order. A mounting bracket is optional and this unit is ordered without one (code J). Flow is published as curves, not a single rated figure, 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 this series as curves rather than a single rated figure, so there is no one number we can honestly quote. Send us your line pressure, downstream demand and port size, and we will confirm the flow and the full datasheet figures for this exact model on request before you order.
Code M means the bowl is drained by hand: an operator opens the drain at the start or end of a shift. It suits installations with modest condensate loads or where you want positive control over draining. Automatic and differential-pressure drains are available in the same series if unattended draining is preferred.
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.