Airtac M5HS Selector Mechanical Valve M5HS21008G
Mechanically actuated · no coil, no pilot airThe AirTAC Airtac M5HS Selector Mechanical Valve M5HS21008G is a genuine 5/2-way selector switch type control valve. A turn-and-stay selector. Manual restoration, so it holds the selected state. It is an external control, direct-acting valve - the spool is moved mechanically, so there is nothing to wire and no pilot line to plumb. Ports are PT1/4 with a 12.0 mm2 (Cv 0.67) effective area.
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Specifications
| Model | M5HS21008G |
|---|---|
| Valve type | 5/2 way, external control, direct acting |
| Actuation | Selector switch type |
| Reset | Manual restoration - it holds the selected position |
| Body series | 200 Series, single control |
| Port size | PT1/4 |
| Effective area | 12.0 mm2 (Cv 0.67) |
| Button colour | Green |
| Fluid | Air, filtered by a 40 um element |
|---|---|
| Pressure range | 0 - 1.0 MPa (0 - 145 psi) |
| Proof pressure | 1.5 MPa (215 psi) |
| Temperature | -20 to +70 C |
| Body material | Aluminium alloy |
| Lubrication | Not required |
| Thread standard | G (BSPP parallel) |
| Spool stroke | 2.0-3.3 mm |
| Actuator stroke | 5.1-6.4 mm at the selector |
Sliding-column (spool) construction, so operating force is not affected by working pressure - there is no back-pressure effect. Lubrication is not required, but once the valve has been run on lubricated air it must stay on lubricated air; AirTAC suggests ISO VG32 or equivalent. The control set is engineering plastic and must be operated by hand only - never switch it by striking it with a tool. The exhaust outlet sits on top of the body, so a silencer fits directly.
About the M5HS21008G
The AirTAC M5HS21008G is a 5/2-way, external control, direct acting valve that is operated by hand - a knurled selector knob you twist to one position and it stays there. There is no coil and no pilot port anywhere on this body, so it belongs to the mechanically actuated M5 family, not to the solenoid 4V range or the air-piloted 4A range. Because it holds its position until a person turns it back, it is the natural choice for mode selection and circuit isolation duties.
This is the 200-series single-control body with a 1/4in PT port and a green selector, giving an effective area of 12.0 mm2 (Cv 0.67). The sliding-column spool means the changeover is not affected by working pressure, so switching feel stays consistent anywhere in the 0-1.0 MPa range. The selector control set is engineering plastic and is strictly for hand operation - striking it with a tool is forbidden. The exhaust outlet sits on top of the body, so a silencer screws straight on without bracket work.
Typical applications
Auto/Manual mode selection on a packaging line
Mounted at a form-fill-seal machine's pneumatic cabinet, the green selector isolates the clamp circuit for manual jam clearing and restores automatic cycling with one twist - the position holds, so nobody has to keep a hand on it.
Clamp isolation on a welding fixture before tool change
Twist the selector to vent the clamping cylinders on a robotic weld jig, change the fixture tooling safely, then twist back to re-pressurise. The held position prevents an accidental mid-change re-clamp.
Two-mode test rig for cylinder benches
On a bench that proof-tests air cylinders, the selector switches the supply between the slow-fill and fast-stroke circuits, letting a technician hold the rig in the slow mode for dial-gauge readings.
How to choose
Choose the HS selector when the valve state must be held by hand and read at a glance; choose the Y lever instead if an operator needs a longer throw with the same hold-position behaviour, or the PL latching button if a press-then-twist action suits the panel better. All three are manual-restoration valves - the difference is the hand motion, not the holding logic. On body and port: the 110 body with 1/8in port offers 8.0 mm2, while this 210 body steps up to 9.0 mm2 at 1/8in or 12.0 mm2 (Cv 0.67) at 1/4in, so size the port to the cylinder bore rather than defaulting to the smaller option.
Respect the published reversal strokes: the spool travels 2.0-3.3 mm and the selector itself 5.1-6.4 mm. Turning the knob past the stop - or jamming it with a screwdriver to force a position - exceeds these limits and damages the valve. AirTAC states this explicitly in the datasheet.
Frequently asked questions
It is a 5/2-way external control, direct acting valve with hand-operated selector actuation and manual restoration (turn and stay). Working pressure is 0-1.0 MPa (0-145 psi), proof pressure 1.5 MPa (215 psi), and media temperature -20 to +70 C with filtered air through a 40 um element. The port is PT1/4 on the 200-series body, with an effective area of 12.0 mm2 (Cv 0.67). The body is aluminium alloy, lubrication is not required, and body or panel mounting are both supported.
AirTAC publishes the reversal strokes as 2.0-3.3 mm of spool travel and 5.1-6.4 mm of selector stroke. These are hard limits, not tolerances: exceeding them damages the valve, and the datasheet says so directly. Fit the knob so it reaches its stop only at full throw, never operate it with pliers or a bar, and remember the plastic control set is for hand operation only. If a control set ever needs replacing, AirTAC supplies them separately as spares.