
Genuine AirTAC filter regulator, order code GTFR20008SNWK from the GTFR200 range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
The GTFR20008SNWK is a 1/4 in GT200 series filter regulator whose trailing K adds a check valve on top of the no-gauge, 5 um configuration. GT200 is the short-bowl version of the GA200, keeping the same features in a smaller body, with a short PC bowl and a differential plus manual drain for condensate.
The N suffix omits the pressure gauge, so pressure must be read elsewhere in your circuit. The W suffix fits the 5 um element in place of the standard 40 um element, and the check valve added by K gives one-way flow protection for the downstream side. PT threads are standard and the mounting bracket is included since the code carries no J.
| Order code | GTFR20008SNWK |
|---|---|
| Product | Filter Regulator |
| Port | 1/4" (08) |
| Type · gauge | Standard (S) · No gauge (N) |
| Configuration | With bracket · 5 µm element (W) · PT thread · Check valve (K) |
| Port | 1/8" (06), 1/4" (08) |
|---|---|
| Thread | PT (standard) |
| Filter element | 40 µm (standard), 5 µm (W) |
| Bowl | Short PC bowl |
| Drain | Differential + manual |
| Fluid | Air |
| Low-pressure (L) version | 0.15 – 0.4 MPa (20 – 58 psi) |
Source: AirTAC Products Catalog 2026A (p.235, PDF01-P0237), GT200 ordering code and specifications.
Choose GTFR20008SNWK over GTFR20008SNW when you also want the one-way flow protection of the K check valve in the same 1/4 in, no-gauge, 5 um package. Nearby options: GTFR20008SN drops the check valve and the 5 um element; GTFR20008SW has the 5 um element and a gauge but no check valve; GTFR20006SNWK is the 1/8 in port equivalent. Order the G or T suffix instead of the PT blank if you need G or NPT threads.
Lines where the upstream air supply can be switched off or lost: the K check valve stops downstream air from flowing back through the regulator when upstream pressure drops.
Feeding 1/4 in clamping and holding circuits on packaging equipment, where the 5 um element protects valves and the check valve isolates the downstream side from backflow.
Multi-branch installations with several regulators: the check valve keeps flow moving one direction through this unit so branches do not feed back into each other.
GT200 series filter regulator, 1/4 in (08) port, PT threads standard, standard (S) regulating type. Code options: W = 5 um element instead of the standard 40 um, N = no pressure gauge, K = check valve fitted, blank on J = mounting bracket included. The bowl is the short PC bowl with differential plus manual drain. The series low-pressure L type regulates 0.15 to 0.4 MPa (20 to 58 psi); confirm the standard-type range from the datasheet.
In the AirTAC GT200 ordering code, K means the unit is built with a check valve; the blank version, such as GTFR20008SNW, comes without one. The check valve makes flow through the regulator one-way, which is why this code is chosen for circuits where downstream air must not vent back through the unit if upstream supply is lost.