The AirTAC GFR300C10MLF2WK AirTAC Filter Regulator PT3/8, 5 um 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 AirTAC GFR300C10MLF2WK is a 300-size filter regulator that cleans compressed air and holds downstream pressure in a single body. The 5 um element removes water and fine particulate, the manual drain lets you empty collected condensate by hand on a schedule you control, and the low-pressure regulator is intended for circuits that run below standard working pressure. The square gauge reads in psi, a reverse/check valve is fitted, and the unit includes a mounting bracket. The port is PT3/8 (3/8 in) with PT thread as the standard; G and NPT threads are catalogue options you can order.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with matching ports, a choice of 40 um standard or 5 um fine filtration, manual, automatic or differential-pressure drains, and gauge or no-gauge builds. Flow figures for this family are published as curves rather than a single rating, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR300C10MLF2WK AirTAC Filter Regulator PT3/8, 5 um |
|---|---|
| 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) |
On carton-sealing and bag-closing machines, this unit filters the air feeding the sealing cylinders and holds a steady low pressure so jaws close consistently through the shift. The 5 um element protects the small valve seats, and the psi gauge lets operators verify setting at a glance.
Bench-mounted analysers, sample-handling actuators and purge lines in lab utilities need clean air at a reduced, stable pressure. The manual drain suits supervised environments where condensate is bled during routine checks, and the check valve keeps settings stable if supply pressure dips.
Filler and capper stations that run actuator circuits below standard plant pressure use this low-pressure filter regulator at the point of use. The bracket mounts it beside the machine, the fine element keeps mist and scale out of the cylinders, and the psi gauge supports line-side pressure checks.
Size 300 with a PT3/8 port sits in the middle of the GFR range; step up to 400 or 600 for larger air demand or down to 200 for compact circuits, matching the port step to the flow your line needs. This build pairs the 5 um fine element (code W) with a manual drain, which suits dry indoor installations where an operator can bleed the bowl during checks; choose automatic or differential-pressure drain if the unit is hard to reach. The low-pressure regulator variant is for circuits that run below standard pressure - confirm the exact working band with us. The square gauge is fitted in a psi scale (MPa and bar scales are alternatives), and the reverse/check valve holds downstream pressure if the supply drops. PT thread is standard; order G (BSPP) or NPT if your piping needs it. Because flow is published as curves and not a single rated figure, send us your application details and we will confirm sizing against the datasheet before you order.
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 rather than a single rated figure, so there is no one number we can quote honestly. Tell us your application - inlet pressure, downstream demand and acceptable pressure drop - and we will confirm the sizing against the datasheet on request before you order.
The M in the code selects a manual drain: condensate collected in the bowl is emptied by hand rather than automatically, which suits accessible, supervised installations. The L code marks the low-pressure regulator variant, intended for circuits that run below standard working pressure; its exact adjustment range is not published in the standard table, so confirm the working band with us for your application.
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.