The AirTAC GFR300C15MLF3WTK AirTAC Filter Regulator NPT1/2 5um 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 GFR300C15MLF3WTK is an AirTAC GFR300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has a 1/2 in NPT port, a 5 um filter element (W grade, finer than the 40 um standard), a manual drain on the metal bowl, and the low-pressure (L) regulator type for circuits that run below standard shop-air pressure. It is fitted with an embedded square gauge reading in bar, a reverse/check valve (K) that holds the downstream setting against upstream dips, and a mounting bracket.
This is a genuine AirTAC part. The GFR family comes in sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and with choices of drain type, filter grade, gauge and scale, thread form (PT standard; G and NPT as order options) and bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). Rated flow is published as curves rather than a single figure, so we confirm flow and datasheet figures for your application on request.
| Model | GFR300C15MLF3WTK AirTAC Filter Regulator NPT1/2 5um |
|---|---|
| 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) |
Point-of-use air preparation for clamp and press fixtures on assembly machines that run below standard line pressure. The low-pressure regulator type sets the clamping force, the 5 um element protects directional valves and cylinders, and the check valve holds the setting through upstream pressure dips.
Filtered, regulated air for a cartoner or wrapper at the machine drop. The manual-drain metal bowl suits lines drained on a scheduled maintenance round, and the bar-scale square gauge gives operators a local pressure readout at the machine.
Air treatment ahead of a robot cell's valve manifold and weld-gun actuation. The 5 um element keeps moisture and particles out of the manifold, the regulator holds a stable low setpoint for the gun circuit, and the included bracket mounts the unit at the cell panel.
Size the unit by body size and port against the flow your line needs: GFR300 with a 1/2 in NPT port sits in the middle of the 200/300/400/600 range, stepping up in port and flow capacity from size 200. Choose the drain to match duty: manual (this unit) for circuits drained on a maintenance schedule, automatic for unattended draining, or the differential-pressure default. Filter grade is 40 um standard or 5 um with the W code, as specified here. Gauges are embedded square as standard with an optional external round gauge in MPa, psi or bar scales; this unit reads bar. Thread is PT as standard with G (BSPP) and NPT as order options - this unit is NPT. A bracket is included unless the J (no-bracket) code is specified.
Flow for the GFR series is published as curves, not a single rating, so ask us to confirm sizing 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 a number here. Send us your line pressure, downstream demand and allowable pressure drop, and we will confirm the flow and datasheet figures for this exact model on request.
M is the manual-drain bowl: condensate is drained by hand on a schedule instead of automatically. L marks the low-pressure regulator type, intended for circuits running below standard line pressure; the exact regulation range for this type is not published, so ask us to confirm it against your setpoint. W is the 5 um filter element (the standard grade is 40 um), and K means a reverse/check valve is fitted to hold the downstream setting.
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.