The AirTAC GFR300C15MLJC2 AirTAC Filter Regulator PT1/2 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 AirTAC GFR300C15MLJC2 is a size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body, so one unit does the job of a filter and a regulator. This configuration is a 1/2 in PT-threaded port, low-pressure type with a 40 um standard filter element, a metal bowl with manual drain, a round pressure gauge reading in psi, and no mounting bracket or reverse/check valve. Manual drainage means an operator opens the drain valve to discharge collected condensate, which suits installations that are checked as part of a routine.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of drain type, 40 um or 5 um filtration, gauge style and scale, PT, G or NPT thread, and bracket options. Flow is published by AirTAC as curves rather than a single rated figure, so ask us to confirm the flow and datasheet figures for this exact model before ordering.
| Model | GFR300C15MLJC2 AirTAC Filter Regulator PT1/2 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. |
|---|---|
| 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) |
A fixture that clamps workpieces with air cylinders set to a low holding pressure gets both clean air and gentle, stable regulation from this single filter regulator, with the psi gauge letting the setter read the clamp setting directly.
Bench rigs and lab equipment that run instruments at reduced pressure use this unit to strip water and particles from the shop air line and hold a low, repeatable setpoint, with manual drain fitted to a supervised workspace.
Textile machinery with low-pressure air circuits uses this filter regulator to protect downstream components from condensate and grit while keeping the circuit pressure where the process needs it, monitored on the round psi gauge.
Start with the port and size: this unit is a size-300 body with a 1/2 in PT port; step up to size 400 or 600 if the application needs more flow, or down to size 200 for compact circuits. Because it is the low-pressure type, it is intended for circuits set below the standard regulator range - confirm the exact adjustment range with us before ordering. The 40 um element is the standard grade; choose the W variant for 5 um filtration. Drain is manual here; an automatic or differential-pressure drain is available if the unit cannot be checked regularly. The gauge on this model is the external round type reading in psi; an embedded square gauge with MPa, psi or bar scale is also offered. Thread is PT as standard, with G (BSPP) and NPT as order options, and the J code means no bracket is fitted - add one if the unit must be panel or wall mounted.
Flow for this series is published as curves, not a single rating, so 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 series as curves rather than a single rated figure, so no one rated flow number exists to quote. Send us your application details and we will confirm the flow figures for this exact model from the datasheet before you order.
The M in the model code specifies a manual drain: condensate collected in the metal bowl is released by opening the drain valve during routine checks. If the installation is not checked regularly, the same size is available with an automatic or differential-pressure drain instead - tell us the model you need and we will confirm it.
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.