Airtac M5B Basic Type Mechanical Valve M5B21006
Mechanically actuated · no coil, no pilot airThe AirTAC M5B Basic Type Mechanical Valve M5B21006 is a genuine 5/2-way basic (plunger) type control valve. A plain plunger head. Pushed by a machine part, a jig or a fingertip. 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 PT1/8 with a 9.0 mm2 (Cv 0.50) effective area.
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Specifications
| Model | M5B21006 |
|---|---|
| Valve type | 5/2 way, external control, direct acting |
| Actuation | Basic (plunger) type |
| Reset | Automatic (spring) restoration |
| Body series | 200 Series, single control |
| Port size | PT1/8 |
| Effective area | 9.0 mm2 (Cv 0.50) |
| 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 | PT (Rc tapered) |
| Spool stroke | 2.0-3.3 mm |
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 M5B21006
The AirTAC M5B21006 is a 5/2 way, external control, direct acting valve whose spool is thrown by a plain plunger - a machine part, jig or fingertip does the pushing. There is no solenoid coil and no pilot port, so it runs anywhere electricity is absent, unwanted or unsafe. The plunger is automatic spring restoration: let go and the valve returns to its original position on its own. This is the 200 Series single-control body with PT1/8 ports and a 9.0 mm2 effective area (Cv 0.50).
Inside sits a sliding-column spool, so the force needed to change over does not rise with working pressure - there is no back-pressure effect, and switching stays consistent anywhere from 0 to 1.0 MPa. The exhaust outlet is on top of the body, so a silencer screws straight on without re-plumbing. Mount it on the body or flush in a panel. The control set is engineering plastic, so operate it by hand or by a guided machine element - the datasheet forbids striking it with a tool.
Typical applications
Drill jig work stop
Mount the valve at the end of a drill jig's sliding table so that, on arrival at the work stop, the table face depresses the plunger and switches air to the clamp cylinder. The spring return unclamps the part the moment the slide is withdrawn.
Bench assembly confirm step
On a small-pump assembly bench, the operator presses the plunger with a thumb to advance a part-present sequence in the fixture. Spring restoration resets between every unit with no separate reset action to remember.
Pneumatic door position signal
In a paint booth, a closing door leaf nudges the plunger to pulse a memory valve and start fan logic through an all-pneumatic circuit - useful where wiring into the zoned area is not wanted.
How to choose
Pick this plunger when the push is deliberate - an operator's thumb, or a guided striker that arrives square to the plunger face. If your trip comes from a passing cam or carriage edge, the roller M5R21006 is the neighbouring choice, because the roller rides onto the cam instead of needing a clean frontal hit. If your cylinder needs more air, step to the M5B21008 with 1/4 in ports and a 12.0 mm2 (Cv 0.67) area; the 110-body M5B11006 is the smaller 8.0 mm2 (Cv 0.45) alternative. Mind the published reversal stroke: the spool stroke is 2.0-3.3 mm, and driving the plunger past that damages the valve, so fit a positive stop.
Frequently asked questions
It is a 5/2 way, external control, direct acting mechanically actuated valve with PT1/8 ports, an aluminium alloy body and a 9.0 mm2 effective area (Cv 0.50). Working pressure is 0-1.0 MPa (0-145 psi), proof pressure 1.5 MPa (215 psi) and the temperature range is -20 to +70 C, with air filtered by a 40 um element. Lubrication is not required, but once lubricated air has been used, continue with the same medium.
The spool stroke is 2.0-3.3 mm - a published limit, not a suggestion. Exceeding it damages the valve. Because the sliding spool has no back-pressure effect, the changeover force stays constant across the pressure range, but the stroke limit applies at every pressure, so arrange a mechanical stop or a striker with limited overtravel.