The AirTAC GFR300C08MJC2GK AirTAC Filter Regulator G1/4, Manual Drain 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 GFR300C08MJC2GK is a size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration has a G1/4 (BSPP) port, a 40 um standard filter element, a manual drain on the polycarbonate bowl, a round pressure gauge reading in psi, a built-in reverse/check valve, and no mounting bracket. The standard regulator covers an adjustment range of 0.05-0.9 MPa (7-130 psi), with a maximum inlet (working) pressure of 1.0 MPa (145 psi) and an operating temperature of -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR filter-regulator family spans sizes 200, 300, 400 and 600 with matching port sizes, and is available with differential-pressure, automatic or manual drains, a 5 um element (code W), embedded square or external round gauges scaled in MPa, psi or bar, G (BSPP) or NPT threads as order options, and optional brackets. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application.
| Model | GFR300C08MJC2GK AirTAC Filter Regulator G1/4, Manual Drain |
|---|---|
| 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) |
Feeding a CNC fixture-clamping circuit, this unit filters condensed water and swarf-laden air from the shop supply and holds a steady regulated pressure so clamps grip consistently part after part; the check valve holds the downstream circuit if supply pressure dips.
On a packaging line driving pneumatic cylinders for carton forming and sealing, the unit strips water and particles before they score cylinder seals, while the regulator keeps actuator speed repeatable across shift-long pressure swings.
At a plant air drop serving assembly benches with air tools and small actuators, the 40 um element protects the tools, the psi gauge gives operators a local setpoint readout, and the manual drain is emptied as part of the daily start-up check.
Size 300 with a G1/4 port sits in the middle of the GFR range (200/300/400/600); step up or down a size when the port or the flow curve of the application demands it. Drain choice matters: the manual drain on this unit must be opened by hand, so choose the automatic or differential-pressure drain codes if the installation is unattended. The 40 um element is the standard grade; specify the W code for the 5 um element where finer filtration is needed. The round gauge on this unit reads psi; square embedded gauges and MPa or bar scales are order options. PT is the standard thread; G (BSPP, as on this unit) and NPT are catalogue options to order. A bracket is optional (this unit is supplied without one), and the K code adds a reverse/check valve.
Flow for the GFR series is published as curves, not as a single rated number, so we do not quote a rated flow figure. Send us your application details and we will confirm the sizing and datasheet figures against the curve before you order.
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 GFR series as curves, not as a single rated figure, so we do not quote a rated flow number. Send us your application details and we will confirm the flow and datasheet figures for the GFR300 against the curve before you order.
The M code fits a manual drain: condensate collected in the bowl must be drained by hand. If the unit will be installed where nobody opens the drain regularly, order the automatic (A) or differential-pressure (blank) drain code instead so water is removed without manual attention.
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.