The AirTAC GFR300C08MJC2WTK AirTAC Filter Regulator NPT1/4 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 GFR300C08MJC2WTK is an AirTAC GFR-series filter regulator: one body that removes water and particulate from compressed air and sets downstream pressure. This size 300 unit carries a 1/4 in NPT port, a 5 um filter element (code W) for finer filtration than the standard 40 um grade, a manual drain for the bowl, and a built-in reverse/check valve that holds downstream pressure when the supply is shut off. The regulator is the standard type with a 0.05-0.9 MPa (7-130 psi) adjustment range, and this configuration is fitted with the external round gauge scaled in psi. It ships without a mounting bracket, so plan to support it from the connected piping. Maximum working pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family is offered in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and with choices of drain type, filter grade, gauge style and scale, thread (PT standard, G and NPT as options), bracket and check valve. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet and flow figures for your application before ordering.
| Model | GFR300C08MJC2WTK AirTAC Filter Regulator NPT1/4 |
|---|---|
| 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) |
Clean, regulated air for the tool-changer and clamping valves on a machining centre: the 5 um element protects the directional valves from particulate and condensed water, while the regulator holds a steady setting and the check valve holds downstream pressure during a supply shutdown.
Feeding the cylinders and grippers on a carton-forming or filling line, where the 5 um grade keeps contaminants out of the small control valves, the psi-scaled round gauge gives operators a visible setpoint, and the manual drain suits a line that is blown down at shift end.
Point-of-use regulation on a robotic pick-and-place cell: the 1/4 in NPT port suits compact gripper circuits, the regulator pins the gripping pressure, and the reverse/check valve prevents pressure loss to the network if the cell is isolated.
Step through the real choices before ordering. Size: 200/300/400/600 sets the port and the flow capacity, so match the size to the air demand of the circuit - we can check the published flow curves against your requirement on request. Drain: this unit has a manual drain (code M), which means someone drains the bowl; if you cannot guarantee that routine, choose the automatic or differential-pressure drain version instead. Filter grade: 5 um (this unit, code W) versus the standard 40 um - pick 5 um where downstream valves and instruments need cleaner air. Gauge: the round external gauge here is scaled in psi; MPa and bar scales are also available. Thread: PT is the standard; G (BSPP) and NPT are catalogue options to order. Bracket: this configuration omits it (code J). Note the regulation range for a manual-drain unit is 0.05-0.9 MPa (7-130 psi). Because flow is published as curves rather than a single rated figure, ask us to confirm sizing against your application 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 number, so there is no one figure we can honestly quote for this unit. Tell us your port size, upstream pressure and the air demand of the circuit, and we will confirm the flow from the datasheet curves on request before you order.
The M in the code means the bowl is drained by hand rather than automatically. Manual drain suits installations where someone is already on site at regular intervals and can bleed the bowl as part of a routine. If the unit will run unattended or moisture load is high, ask us about the automatic or differential-pressure drain versions of the same GFR300 filter regulator.
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.