The AirTAC GFR300C15AF1WT AirTAC Filter Regulator 1/2 in NPT, 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 AirTAC GFR300C15AF1WT is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in a single body. This 300-size unit is tapped 1/2 in NPT, uses the 5 um element (code W) for finer filtration than the 40 um standard, drains collected condensate automatically, and carries the embedded square gauge scaled in MPa. The regulator adjusts from 0.15 to 0.9 MPa (20-130 psi), the maximum inlet pressure is 1.0 MPa (145 psi), and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl and a mounting bracket are included; no reverse/check valve is fitted.
This is a genuine AirTAC part. The GFR range spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options for manual or differential-pressure drains, 5 um or 40 um elements, gauge scale in MPa, psi or bar, and G or NPT threads in place of the PT standard. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and the sizing for your application.
| Model | GFR300C15AF1WT AirTAC Filter Regulator 1/2 in NPT, 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. |
|---|---|
| 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 filtered, regulated air to the clamping cylinders on a welding or machining fixture, so clamp force stays consistent through the shift while water and chips are kept out of the valve stack.
Conditioning the shop-air feed at the inlet of a CNC machining centre, protecting tool-change actuators and air blast circuits from condensate and fine particulate while holding a steady set pressure.
Supplying the diverter, stopper and pusher cylinders on a bottling or carton packing line, where the automatic drain keeps the bowl clear during continuous running and the 5 um element protects the directional valves.
Choose the size by the port and flow step: sizes 200, 300, 400 and 600 move up in port and capacity, and this 300-size unit is already at 1/2 in NPT. Pick the drain to match your maintenance routine: automatic (as fitted here) expels condensate without attention, manual needs a periodic twist, and the default differential-pressure drain works off the pressure drop. Pick the element grade: 40 um standard, or 5 um (code W, fitted here) where cleaner air matters. Gauge scale can be MPa, psi or bar, threads can be ordered in G (BSPP) or NPT instead of the PT standard, and a mounting bracket is included. Flow is published as curves, not a single rating, so send us your flow and pressure requirements and we will confirm sizing against the datasheet 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.
Flow for the GFR300 series is published as curves rather than a single rated figure, so we do not quote a number here. Tell us your required flow and working pressure and we will confirm against the AirTAC datasheet whether this 1/2 in NPT unit is correctly sized for the application.
The A is the automatic drain, which expels collected condensate by itself so the bowl does not need periodic manual draining; manual and differential-pressure drain versions are available to order. The W is the 5 um filter element, one grade finer than the 40 um standard, which suits valves and cylinders that need cleaner air.
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.