The AirTAC GFR300C08MJC2WGK AirTAC Filter Regulator G1/4, 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 GFR300C08MJC2WGK is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in one body, with a drain bowl but no lubricator. This configuration carries a G1/4 (BSPP) port on the 300 size, a 5 um filter element (the finer W grade, versus the 40 um standard), a manual drain, a round pressure gauge reading in psi, and a built-in reverse/check valve that blocks backflow through the unit. The regulator is the standard type with an adjustment range of 0.05-0.9 MPa (7-130 psi), and maximum inlet pressure is 1.0 MPa (145 psi). Operating temperature is -5 to 70 C, non-freezing. The 300-size bowl is polycarbonate (PC); only the 600 size uses an aluminium alloy bowl. No mounting bracket is included with this code.
This is a genuine AirTAC part. The GFR family spans the 200, 300, 400 and 600 sizes with a choice of ports, drain types (differential-pressure, automatic or manual), filter grades (40 um standard, 5 um optional), gauge styles and scales, and PT, G or NPT threads. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR300C08MJC2WGK AirTAC Filter Regulator G1/4, 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) |
Conditioning and regulating the compressed air feeding gripper and pusher cylinders on a bottling line: the 5 um element strips water and fine particulate before the actuators, the regulator holds a steady working pressure, and the check valve blocks reverse flow if upstream supply drops.
A filtered, regulated air drop for spray guns in a finishing booth. The 5 um grade protects finish quality from water and fine contamination, the psi gauge lets operators set and verify gun pressure at a glance, and the manual drain is emptied during booth clean-down.
Supplying regulated air to pneumatic clamps on a CNC machining fixture. The regulator holds consistent clamp pressure for repeatable part holding, the check valve prevents backflow through the unit, and the G1/4 port matches standard machine-side drops.
Start with the size and port: the 300 size with a G1/4 port suits lines plumbed at 1/4 in, and the 400/600 steps give larger ports for higher air demand - match the step to your flow curve, not to a single rating. Choose the drain to suit access: manual (this unit) needs periodic draining by hand, automatic drains on a schedule of its own, and the differential-pressure default drains when the element loads up. Pick the filter grade by what the downstream equipment tolerates: 40 um for general supply, 5 um (this unit) where finer particulate and water carryover protection matters. Gauge scale is selectable (MPa, psi or bar - this unit ships with a round psi gauge), and thread is PT as standard with G and NPT as order options. A bracket is optional on this family; this code omits it. Because flow is published as curves rather than 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 GFR300 series as curves, not as a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Tell us your application and we will confirm the flow and sizing figures from the datasheet on request before you order.
This unit has a manual drain (code M): accumulated water is released by hand, which suits accessible installations on a maintenance routine. AirTAC also offers automatic (code A) and differential-pressure (blank) drains on the GFR family for points that cannot be drained regularly. The manual-drain version also carries the wider 0.05-0.9 MPa (7-130 psi) regulator adjustment range.
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.