Airtac M5D Short Handle Type Mechanical Valve M5D21008G
Mechanically actuated · no coil, no pilot airThe AirTAC Airtac M5D Short Handle Type Mechanical Valve M5D21008G is a genuine 5/2-way short handle type control valve. A short hand lever where panel depth is limited. 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 | M5D21008G |
|---|---|
| Valve type | 5/2 way, external control, direct acting |
| Actuation | Short handle type |
| Reset | Automatic (spring) restoration |
| 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 | 2.0-3.0 mm |
| Actuator stroke | 5.5-8.0 mm at the handle |
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 short handle type control set is METAL, which gives a longer service life than the engineering-plastic heads. The exhaust outlet sits on top of the body, so a silencer fits directly.
About the M5D21008G
The M5D21008G is a 5/2-way external control, direct acting valve that is thrown by hand - a short lever, not a coil and not an air pilot signal. Flip the green short handle one way and the valve shifts; let go and the spring snaps the spool straight back. There is no solenoid anywhere in it, so it belongs wherever electricity is absent, unwanted or simply not allowed: hand stations on pneumatic presses, fixture clamping on a machining centre, or a manual override bolted next to a 4V bank for maintenance shifts.
This is the 200-series (210) body with a 1/4 PT port and an effective area of 12.0 mm2 (Cv 0.67), the largest flow in the M5 common family, sized to keep bigger cylinders moving without starving them. The short handle's D-type control set is metal, so the lever action stays stable over years of repeated throws, and because the spool is a sliding column the switching force is not affected by working pressure - there is no back-pressure effect, so the lever feels the same at 0.2 MPa as it does at 1.0 MPa. The exhaust sits on top of the body, so a silencer screws straight on and the station stays quiet without rerouting pipework.
Typical applications
Clamp-and-release on a machining fixture
Mounted on the fixture baseplate of a CNC milling jig, the short spring-return lever clamps the pneumatic swing clamp with a deliberate flip and releases it the moment the operator's hand leaves - no stored state between cycles, so a part can never be removed under clamped air.
Manual start station on a packaging line
On a carton sealing machine, the D handle gives the operator a positive, low-reach switch to jog the conveyor section during setup, and the spring return guarantees the line stops the instant the lever is released - no electricity at the station, just filtered air.
Maintenance override beside a solenoid bank
Piped in parallel with a 4V solenoid manifold on a bottling conveyor, the short lever lets a technician drive the 1/4-port actuator by hand during fault finding, with the spring return isolating the manual path as soon as it is let go.
How to choose
Choose the short handle (D) over the long handle (C) when the valve sits on a shallow panel or inside a guard where a long lever would foul the machine frame - the C handle reaches 11.0-16.0 mm of travel for extra leverage, while this D handle needs only 5.5-8.0 mm and keeps a low profile. If the state must hold instead of spring back, step to the M5Y lever, which stays where you set it. On flow: the 210 body at 1/4 gives 12.0 mm2 (Cv 0.67) versus 9.0 mm2 (Cv 0.50) on the same body at 1/8 - upsize if your cylinder bore or speed demand says so, and stay on the 110 body only for compact single-control stations. One warning to respect: the published reversal stroke is 2.0-3.0 mm on the spool and 5.5-8.0 mm on the handle. Exceeding it damages the valve, so mount a stop or escutcheon that physically caps the lever throw.
Frequently asked questions
It is a 5/2-way external control, direct acting, mechanically actuated valve with a short hand lever and automatic spring return. Working pressure 0-1.0 MPa (0-145 psi), proof pressure 1.5 MPa (215 psi), temperature -20 to +70 C, medium air filtered to 40 um. Port is PT1/4 on the 210 body with an effective area of 12.0 mm2 (Cv 0.67). Body is aluminium alloy, lubrication is not required, and the metal D control set can be ordered separately as a spare.
Do not exceed the published reversal stroke: 2.0-3.0 mm on the spool and 5.5-8.0 mm on the handle itself. AirTAC states explicitly that going beyond these limits damages the valve, so the mounting panel or a fabricated stop should physically limit the lever's arc rather than relying on the operator's feel. Mount the valve body or use the panel-mount option so the stop takes the load, not the lever boss.