The AirTAC GFR300C15MF3WTK AirTAC Filter Regulator NPT 1/2 in 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 GFR300C15MF3WTK is an AirTAC GFR-series filter regulator: water and particulate filtration plus downstream pressure regulation combined in a single body. This size 300 unit is threaded 1/2 in NPT, carries a 5 um filter element (the finer of the two catalogue grades), a manual drain on the polycarbonate bowl, an embedded square gauge reading in bar, and a built-in check valve that holds downstream pressure if the upstream supply drops. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator covers 0.05-0.9 MPa (7-130 psi), and the working temperature range is -5 to 70 C, non-freezing. A mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and is offered with 40 um or 5 um filtration, differential-pressure, automatic or manual drains, square or round gauges scaled in MPa, psi or bar, G (BSPP) or NPT threads alongside the PT standard, and an optional check valve. Flow for this series is published as curves rather than a single rated figure; ask us and we will confirm the datasheet figures for your application.
| Model | GFR300C15MF3WTK AirTAC Filter Regulator NPT 1/2 in |
|---|---|
| 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. |
|---|---|
| C1 | 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-C1 (two-unit set) |
Feeding clamping cylinders and vise actuators on a machining cell: the 5 um element shields the cylinders from water and airborne swarf, the regulator holds a steady clamp setting, and the check valve keeps fixtures clamped through a momentary supply dip.
Stopper, pusher and divertor cylinders along a packaging conveyor need clean air at one stable pressure; a single GFR body at the line drop filters the supply, regulates it, and shows the line pressure at a glance on its bar-scale gauge.
Quarter-turn pneumatic valve actuators on a water-treatment skid: the regulator sets the actuator operating pressure, the 5 um grade protects the positioner and solenoid valves, and the manual drain lets an operator clear accumulated water at shutdown.
Size and port step up together across the GFR range - 200, 300, 400 and 600 - so choose the size whose published flow curve covers your air demand at your working pressure; we can check the curve against your application before you order. The rest of the choices are all readable in the code: drain type (manual here; automatic and differential-pressure are the alternatives), filter grade (5 um as coded with W, against the 40 um standard), gauge scale (bar on the embedded square gauge, with MPa, psi or an external round gauge as options), thread (NPT as coded, against the PT standard and the G/BSPP option), and the check valve (K) that keeps downstream air in place on an upstream loss. A mounting bracket is included on this configuration.
One honest note on sizing: flow is published as curves, not a single rating, so ask us to confirm the figures 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 GFR series as curves rather than a single rated figure, so we do not quote one number. Tell us your working pressure and air demand and we will confirm the datasheet curve figures for this exact 1/2 in configuration before you order.
The M in this code selects a manual drain: condensate collects in the bowl until it is opened by hand, which suits cabinets or drop points an operator already visits routinely. If the unit will sit where it cannot be drained often, the same GFR300 body is available with an automatic or differential-pressure drain - ask us and we will quote the alternative.
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.