The AirTAC GFR30008AC1TK AirTAC Filter Regulator NPT1/4 Auto Drain 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 PT1/4" ports, a automatic 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 GFR30008AC1TK is a 300-size filter regulator that removes water and particulate from compressed air and holds downstream pressure in a single 1/4 in NPT-threaded body. This configuration carries an automatic drain, so condensate in the polycarbonate bowl is expelled without operator attention, a 40 um standard filter element, and a round pressure gauge on an MPa scale so the set pressure is visible at a glance. A reverse (check) valve is fitted, and the unit includes a mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator adjusts from 0.15 to 0.9 MPa (20-130 psi), and the operating temperature range is -5 to 70 C (non-freezing).
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, and with choices of drain type, 40 um or 5 um (W) filtration, gauge style and scale, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures on request.
| Model | GFR30008AC1TK AirTAC Filter Regulator NPT1/4 Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, MPa 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 0.15 - 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. |
|---|---|
| 08 | Port size PT1/4". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| A | Drain: Automatic 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). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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 · PT1/4" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Feeding a bench-mounted pneumatic press station: the 40 um element strips water and pipe-scale from the shop air line while the regulator holds a steady working pressure to the press valve, and the automatic drain keeps the bowl clear between shifts.
Supplying air to cylinder-driven diverters and pushers on a packaging conveyor: clean, regulated air at a fixed setting keeps stroke timing consistent, the round MPa gauge lets the line technician verify the setpoint, and the check valve holds the downstream circuit if supply dips.
Conditioning the compressed air feed to a laboratory or test-bench rig: the 40 um filter removes particulate and condensed water ahead of sensitive instruments, the regulator sets a stable supply pressure, and the automatic drain suits an unattended installation.
Step through the decodable choices in order. Size 300 with a 1/4 in port suits mid-range actuator and tool circuits; step up to 400 or 600, or down to 200, as your pipe size and air demand change. Drain type matters day to day: automatic (this unit) empties the bowl unattended, manual drain relies on an operator, and differential-pressure drain discharges on the pressure drop across the element. Filtration is 40 um standard; specify the W option for 5 um where finer protection is needed. The gauge here is round with an MPa scale; psi and bar scales and a square gauge style are alternatives. Thread is NPT on this code, with PT (standard) and G available to order; a bracket is included.
Sizing honesty: AirTAC publishes flow for this family as curves, not a single rated number, so we do not quote a rated flow figure. Ask us to confirm the datasheet curve against your application's flow demand before you order.
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 series as performance curves rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Tell us your application's flow demand and we will confirm the datasheet curve and sizing for this 300-size, 1/4 in unit on request.
The A in the code GFR30008AC1TK selects the automatic drain, which expels collected condensate from the bowl without operator attention - useful where the unit is mounted out of easy reach or runs unattended. The GFR family is also offered with a manual drain (code M) or the default differential-pressure drain; those are separate order codes.
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.