The AirTAC GFR300C15MLC3WT AirTAC Filter Regulator NPT1/2 Low-Pressure 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 GFR300C15MLC3WT is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This unit is threaded NPT1/2 (1/2 in), carries a 5 um filter element for finer filtration than the standard 40 um grade, and uses a manual drain, so collected condensate is released by an operator rather than automatically. It is the low-pressure regulator type, is fitted with an external round gauge scaled in bar, and includes a mounting bracket. The size 300 bowl is polycarbonate (PC).
This is a genuine AirTAC part. The GFR series spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, offered with a choice of drain type, filter grade, gauge style and scale, thread (PT standard; G and NPT are order options) and bracket option. Flow for this family is published as curves rather than a single rated figure, so ask us to confirm sizing and datasheet details for your application before ordering.
| Model | GFR300C15MLC3WT AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| 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) |
Supplying filtered, regulated air at reduced pressure to clamp and unclamp cylinders on a CNC milling or turning fixture, where the low-pressure type and 5 um element protect the clamp circuit.
Conditioning the air feeding cylinder-driven sealing, forming and eject stations on a packaging line, with the manual drain cleared during scheduled changeover and cleaning.
Feeding the air cylinders that raise gates and diverters between conveyor lanes on a bottling or canning line, keeping water and particles out of the valve stack.
The real choices on this series: step size (200/300/400/600) and port against the flow your line needs; drain type - manual as fitted here, or automatic or differential-pressure; filter grade - the 5 um element fitted here versus the standard 40 um; gauge - the external round bar gauge fitted here, or the embedded square gauge with an MPa, psi or bar scale; thread - PT is standard, with G and NPT available to order; bracket included. This unit is the low-pressure regulator type, so confirm its adjustment range with us before ordering. Flow is published as curves, not a single rating - send us your flow and pressure requirements and we will confirm the right size against your application.
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 there is no one number we can honestly quote. Tell us your working pressure and the flow your application needs, and we will confirm the sizing against the datasheet curves on request before you order.
This unit is the low-pressure regulator type (code L), and the adjustment range for that version is not published in the standard table, so we confirm it on request rather than quote a figure. The bowl uses a manual drain: an operator opens the drain to release collected condensate, which suits installations that are checked as part of a regular maintenance routine.
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.