The AirTAC GFR300-10G AirTAC Filter Regulator G3/8 5 um Manual Drain is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT3/8" 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 GFR300-10G is a size-300 filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries a G3/8 (BSPP) port, a 5 um filter element for finer protection than the standard 40 um grade, a manual drain on the PC bowl for controlled water removal, a round pressure gauge reading in psi, and a built-in reverse/check valve that holds downstream pressure when the supply is lost. It is supplied without a mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator adjusts from 0.05 to 0.9 MPa (7-130 psi), and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part from the GFR filter-regulator family, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch. Options across the range include automatic, manual or differential-pressure drains, 40 um or 5 um filtration, embedded square or external round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and datasheet figures for your application.
| Model | GFR300-10G AirTAC Filter Regulator G3/8 5 um Manual Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (G (BSPP) thread) |
| Filtering grade | 5 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 — round, psi 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. |
|---|---|
| 10 | Port size PT3/8". 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| G | G (BSPP) 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Clean, regulated air for the clamp-and-seal cylinders on a carton erecting and taping machine: the 5 um element protects the directional valves from particulate and condensed water while the regulator holds a steady actuator pressure, and the check valve keeps the clamps from releasing if the plant supply drops.
Point-of-use supply for the pneumatic stop gates and pushers along a bottling hall conveyor, where the manual-drain bowl lets the line operator bleed off accumulated water at shift start and the psi gauge gives a visible setpoint for the gate cylinders.
Conditioning the air feed to a lab automation skid with small clamping cylinders, where the finer 5 um grade suits sensitive pilot valves, the round psi gauge supports documented setpoints, and the reverse/check valve holds the clamped position during a supply interruption.
Start with the port and size step: this unit is size 300 with a G3/8 port, one step up from the 1/4-inch size-200 frame - match the step to the air demand of the circuit rather than the pipe size alone. Choose the drain to suit access: this unit has a manual drain, which suits attended installations where an operator can bleed the bowl; choose automatic or differential-pressure drain codes where the unit is hard to reach. The 5 um (W) element on this unit is the finer of the two published grades (40 um standard) - pick it where precision valves or cylinders need cleaner air. The round gauge here reads in psi; square embedded gauges and MPa or bar scales are alternatives in the family. Thread is G (BSPP) on this unit, with PT standard and NPT available as order options, and the J code means no bracket is fitted - add a bracket code if the unit will be panel or wall mounted. Because flow is published as curves and not a single rating, ask us to confirm sizing against your application before ordering.
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 GFR family as curves rather than a single rated figure, so no single l/min or SCFM number can be quoted honestly. Tell us your application's air demand and line pressure and we will confirm the correct size and the flow/datasheet figures for you before you order.
The M in GFR30010MJC2WGK selects a manual drain: an operator opens the drain to remove collected water, which suits attended installations; automatic (A) and differential-pressure (blank) drains are available in the same family for unattended duty. The trailing K fits a reverse/check valve, which holds downstream pressure if the upstream supply is lost. Note the regulation range for manual-drain units is 0.05-0.9 MPa (7-130 psi).
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.