The AirTAC AirTAC GFR300C10JNT Filter Regulator 3/8 in NPT 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 GFR300C10JNT is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one compact body. This 300-size unit is threaded NPT3/8 (3/8 in), carries a 40 um standard filtration element, and drains condensate by differential pressure, so the bowl empties automatically as the pressure differential across the element builds - no daily manual draining on lightly loaded lines. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi) and an operating temperature of -5 to 70 C (non-freezing). No gauge is fitted on this variant and no mounting bracket is included.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, and options include a 5 um element (code W), automatic or manual drains, a fitted gauge in square (embedded) or round (external) style with MPa, psi or bar scales, and G (BSPP) or NPT threads in place of the PT standard. Flow is published as curves rather than a single rating, so ask us to confirm sizing or any datasheet figure for your application before ordering.
| Model | AirTAC GFR300C10JNT Filter Regulator 3/8 in NPT |
|---|---|
| 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) |
Feeds clean, pressure-controlled air to tool-clamp and pallet-changer circuits on a machining centre, with the 40 um element keeping swarf-chilled condensate and pipe scale out of the clamping valves while the regulator holds a steady setting across the shift.
Sits at the drop of a packaging conveyor's air header, filtering water picked up in the distribution run and regulating pressure to the case-erecting and sealing cylinders, with the differential-pressure drain handling condensate without operator attention.
Protects the solenoid valve manifold on an automated paint or coating line: the 40 um element stops particulate from scoring valve seats, and the regulator keeps actuator pressure consistent so the manifold sequences reliably through the full temperature range of -5 to 70 C.
Start with the port step: this unit is NPT3/8 on the 300-size body; if your line needs more or less flow capacity, step up or down through sizes 200, 300, 400 and 600, which carry progressively larger ports. Choose the drain to match maintenance reality: differential-pressure (this unit) drains itself as the element loads, automatic (code A) empties on a cycle, and manual (code M) is emptied by hand - the manual-drain variant also widens the regulation range down to 0.05 MPa (7 psi). The 40 um element suits general plant air; specify 5 um (code W) where finer protection is needed. Gauges are optional: square embedded or round external, with MPa, psi or bar scales. Thread is PT as the standard, with G (BSPP) and NPT as order options - this unit is the NPT version. Brackets are optional (this variant has none).
One honest note before you order: AirTAC publishes flow for this family as curves, not as a single rated figure, so send us your flow and pressure requirements and we will confirm the correct size against the datasheet 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 curves rather than a single rated figure, so there is no one rated-flow number we can quote for this unit. Tell us your required flow and working pressure and we will confirm the correct size against the datasheet on request before you order.
The N in the code means no gauge is fitted and the J means no mounting bracket is included; both are catalogue options, not limitations. You can order a GFR300 variant with an embedded square gauge or an external round gauge in MPa, psi or bar scales, and with a bracket for panel or wall mounting. Threads are also a choice: PT is the standard, with G (BSPP) and NPT (as on this unit) available to order.
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.