The AirTAC GFR300C08MLC3TK AirTAC Filter Regulator NPT1/4 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 GFR300C08MLC3TK is an AirTAC GFR300 filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This configuration is a size 300 unit with a 1/4 in NPT thread, a metal bowl with a manual drain, the standard 40 um filter element, and the low-pressure (L) regulator variant - its exact adjustment range is not published, so we confirm it on request. It also carries a round gauge scaled in bar, a built-in reverse/check valve, and a mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR series is made in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and can be ordered with a choice of drain type, 40 um or 5 um (W) filtration, gauge style and scale, PT, G or NPT thread, and bracket options. Flow is published as curves rather than a single rating, so ask us to confirm sizing and any datasheet figure for your application before you order.
| Model | GFR300C08MLC3TK AirTAC Filter Regulator NPT1/4 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. |
|---|---|
| C0 | 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-C0 (two-unit set) |
Feeds filtered air to a clamping circuit that must hold workpieces at a reduced, stable setting rather than full line pressure, with the low-pressure regulator variant doing the setting and the 40 um element protecting the clamp cylinder.
Sits at the drop of a packaging line to clean water and scale out of the shop air and hold a steady, lowered pressure to the sealing-head cylinders, with the manual drain emptied during scheduled changeovers.
Conditions the air feeding stoppers, diverters and pushers on a bottling or material-handling conveyor, where the check valve holds the downstream setting if supply pressure dips and the bar gauge gives operators a local reading.
Step through the sizes 200/300/400/600 and the ports 1/8 to 1 in against the flow your line needs - because flow is published as curves, not a single rating, ask us to confirm the right size for your application before ordering. On this unit the drain is manual, so an operator opens the bowl drain periodically; automatic or differential-pressure drains are available if you want unattended condensate removal. Filtration here is the 40 um standard element; specify the W code for the 5 um element where finer protection matters. The gauge on this code is the external round type scaled in bar; the embedded square gauge with MPa, psi or bar scales is the standard alternative. Thread is NPT on this model - PT is the standard thread and G (BSPP) is also an order option. A mounting bracket is included.
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 this series as curves, not as a single rated figure, so we do not quote a number here. Send us your application details - port, line pressure and the equipment being fed - and we will confirm the correct size and the flow figures from the datasheet before you order.
The L code marks the low-pressure regulator variant, used where downstream settings sit below the standard type's range; the exact adjustment range for this variant is not published, so we confirm it from the datasheet on request. The M code is the manual drain: collected condensate is released by opening the bowl drain by hand, so plan a routine check of the bowl.
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.