The AirTAC GFR300C15NWTK AirTAC Filter Regulator 1/2in NPT 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 GFR300C15NWTK is an AirTAC GFR300 filter regulator: one body that removes water and particulate from compressed air and holds downstream pressure steady. This 300-size unit is threaded NPT1/2, is set to the fine 5 um filtration grade (code W), and drains condensate by differential pressure, so the bowl empties itself whenever the pressure differential across the element is high enough - no daily manual draining routine. A reverse/check valve is fitted, holding downstream pressure if the upstream supply is lost, and no gauge is supplied with this configuration, so add your own if you want to read the regulated setting at the unit.
This is a genuine AirTAC part. The GFR family is published in 200, 300, 400 and 600 sizes with ports from 1/8 to 1 inch, a choice of drain types, 40 um standard or 5 um fine filtration, gauge options and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulation range with this drain type is 0.15-0.9 MPa (20-130 psi), and working temperature is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application.
| Model | GFR300C15NWTK AirTAC Filter Regulator 1/2in NPT 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) |
Installed at the point where the main plant air line branches to a production cell, it strips water and fine particles and holds a steady regulated pressure to every tool and valve on that drop, with the check valve protecting the cell if the header is shut off.
Mounted on the air supply to conveyor diverters, gate cylinders and stopper units, it keeps the operating pressure constant through a full shift so cylinder stroke behaviour stays repeatable, while the 5 um grade protects the small control valves on the line.
Fitted ahead of clamping and fixture circuits on machine tools, it delivers clean, finely filtered air at a fixed setting, and the reverse/check valve holds clamp pressure against a momentary supply dip rather than releasing the workpiece.
Size and port are the first decision: step up through 200, 300, 400 and 600 as your required flow and pipe size grow - this unit sits at 300 with a 1/2 in NPT thread. Drain type is next: differential-pressure (this unit) suits installations you do not want to walk; automatic suits unattended duty; manual suits supervised points. Choose 5 um (this unit) where downstream equipment is sensitive to fine particles, or the 40 um standard grade for general protection. Gauge scale (MPa, psi or bar) and bracket options apply to units ordered with a gauge; this configuration ships without one. Thread is PT as standard, with G and NPT as order options - this unit is the NPT version.
One honest note before you order: AirTAC publishes flow for this family as curves, not as a single rated figure, so we do not quote a number here. Send us your application and we will confirm the sizing against the datasheet curves before you commit.
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 family as performance curves, not as a single rated figure, so we do not quote a number on the page. Tell us your operating pressure and the flow your application needs, and we will confirm the sizing against the datasheet curves before you order.
This configuration is ordered without a gauge (code N), so you can read the regulated pressure from your own downstream gauge or add a gauge variant of the GFR300 instead. The fitted reverse/check valve (code K) blocks backflow and holds the downstream pressure if the upstream supply drops, which protects circuits that must not lose their 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.