The AirTAC GFR30008MF3TK AirTAC Filter Regulator NPT1/4 Manual Drain 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 PT1/4" ports, a manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR30008MF3TK is a 300-size filter regulator that removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration is 1/4 in NPT thread, has a manual drain on the PC bowl, a 40 um filter element, an embedded square gauge scaled in bar, a built-in reverse/check valve, and includes a mounting bracket. With a manual drain, the regulated outlet pressure covers 0.05-0.9 MPa (7-130 psi), and the maximum inlet pressure is 1.0 MPa (145 psi). Operating temperature is -5 to 70 C, non-freezing.
This is a genuine AirTAC part in the GFR300 series, one of four sizes (200/300/400/600) with ports from 1/8 to 1 inch and options including automatic or differential-pressure drains, a 5 um element (code W), alternate gauge scales, and G or NPT threads. Flow is published as curves rather than a single rating, so we confirm the datasheet figures for your application on request.
| Model | GFR30008MF3TK AirTAC Filter Regulator NPT1/4 Manual Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, bar scale |
| Reflux valve | Fitted (reverse flow permitted) |
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 0.05 - 0.9 MPa (7 - 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. |
|---|---|
| 08 | Port size PT1/4". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
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 · PT1/4" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Feeds a 1/4-in-piped pneumatic press with cleaned, regulated air; the manual drain lets the operator blow down the bowl at shift start, and the check valve holds the set pressure if the supply dips.
Mounted on the bracket inside a CNC machine's cabinet, it strips water and 40 um particulate from the shop air before it reaches tool-change cylinders, with the bar-scale square gauge giving the setter a local setpoint.
Supplies the air cylinders driving diverters and stoppers on a packaging conveyor, keeping the line pressure steady at the regulator setting while the manual drain clears accumulated condensate during cleaning rounds.
Start with the port step: the 300 size with 1/4 in ports suits lines where the required flow sits above the 200 size but a compact body is preferred; step up to 400 or 600 for larger demand. Because flow is published as curves rather than a single rating, ask us to confirm sizing against your application before ordering. This unit has a manual drain, so plan a routine blow-down; if unattended drainage is needed, the automatic (A) or differential-pressure versions of the same series are the alternatives. The 40 um element is the standard grade; specify the W code for 5 um where finer filtration is required. The square gauge here reads in bar; MPa and psi scales are also available, and an external round gauge is optional. Thread is NPT on this model, with PT (standard) and G as order options. A mounting bracket is included.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR300 series as curves rather than a single rated figure, so we do not quote one number. Tell us your inlet pressure and the flow your application needs and we will confirm the sizing from the datasheet on request before you order.
The M in the code specifies a manual drain, so the bowl must be blown down by hand at intervals instead of draining itself. On this filter regulator the manual-drain version covers a regulation range of 0.05-0.9 MPa (7-130 psi), wider at the low end than the 0.15-0.9 MPa range of the automatic and differential-pressure drain versions.
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.