The AirTAC GFR300C15MJC2WK AirTAC Filter Regulator PT1/2, 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 GFR300C15MJC2WK is a size 300 filter regulator: water and particulate filtration plus downstream pressure regulation in a single body. This configuration is tapped PT1/2 (1/2 in), carries a 5 um filter element for finer air cleaning than the standard 40 um grade, and drains by hand through a manual drain, so it suits installations where an automatic drain is not wanted. A round pressure gauge scaled in psi is fitted for setting the outlet pressure, a reverse/check valve is built in to hold the downstream setting, and the unit 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). The bowl on this size 300 unit is polycarbonate (size 600 units use aluminium alloy).
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 PT, G or NPT thread, manual, automatic or differential-pressure drains, 40 um or 5 um filtration, and gauge options. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300C15MJC2WK AirTAC Filter Regulator PT1/2, 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) |
Mounted at the air inlet of a CNC machining centre, it cleans the shop air to 5 um and sets a stable regulated pressure for the machine's tool-clamp and chip-clearing cylinders, with the psi gauge giving the operator a direct setting reference.
On a carton sealing or wrapping line, the unit feeds the sealing-jaw and pusher cylinders: the 5 um element protects the small control valves from grit and water, the regulator holds a steady jaw pressure, and the check valve keeps the setting if upstream supply dips.
In a manual assembly cell running pneumatic press and clamp cylinders, this filter regulator conditions the drop-line air and lets each cell set its own working pressure independently of the main header, with the manual drain emptied during routine checks.
Size 300 with a PT1/2 port sits in the middle of the GFR range; step up to 400/600 or down to 200 according to the flow your line needs - we can check the published flow curves against your demand before you order. Drain choice is real: this unit is manual drain (drain by hand as part of maintenance); automatic and differential-pressure drains are available on other codes if you want condensate removal without attention. Filtration is 5 um here (code W); the standard grade is 40 um if finer filtration is not required. The fitted round gauge reads in psi; square embedded gauges and MPa/psi/bar scales are the alternatives. Thread is PT as standard, with G (BSPP) and NPT as order options, and a mounting bracket can be added on codes that include one.
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 GFR300 series as curves rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Send us your application's flow and pressure demand and we will confirm the sizing against the datasheet curves on request before you order.
This code carries M for a manual drain: condensate is emptied by hand as part of routine maintenance, which suits attended installations. If you want condensate removed without attention, GFR300 codes with automatic or differential-pressure drains are available - just ask for the matching model.
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.