Airtac M5PM Mushroom Push Button Type Mechanical Valve M5PM21006B
Mechanically actuated · no coil, no pilot airThe AirTAC Airtac M5PM Mushroom Push Button Type Mechanical Valve M5PM21006B is a genuine 5/2-way mushroom head type control valve. A large mushroom head that can be hit with a palm without looking for it. 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 | M5PM21006B |
|---|---|
| Valve type | 5/2 way, external control, direct acting |
| Actuation | Mushroom head type |
| Reset | Automatic (spring) restoration |
| Body series | 200 Series, single control |
| Port size | PT1/8 |
| Effective area | 9.0 mm2 (Cv 0.50) |
| Button colour | Black |
| 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 |
| Actuator stroke | 3.8-5.1 mm at the button |
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 M5PM21006B
The AirTAC M5PM21006B is a 5/2-way external control, direct acting valve whose spool is thrown by a hand, not a coil: there is no solenoid, no wiring and no pilot port anywhere on this valve. A large mushroom head sits proud of the 200-series (210) body so an operator can strike it with the flat of a palm without pausing to look or aim. The instant the palm lifts, a spring snaps the spool back to its rest position - reset is automatic, so nothing stays latched between cycles.
This 210-body version carries a 1/8in PT thread and a 9.0 mm2 (Cv 0.50) orifice. Because the spool is a sliding-column design, the force needed to change over does not rise with working pressure: there is no back-pressure effect, so the head feels the same at 0.2 MPa as it does at 0.8 MPa. The exhaust outlet sits on top of the body, so a silencer screws straight on and keeps the station quiet. It runs on 40 um filtered air at 0-1.0 MPa and -20 to +70 C, and replacement control sets can be ordered as spares.
Typical applications
Two-palm start station
Bolt two M5PM21006B valves into a press or crimping fixture so the operator must place both palms on the mushroom heads to start the cycle; the spring return drops both valves to rest the instant either hand lifts.
Packaging line manual jog
Panel-mount one beside a carton sealer so a supervisor can palm-strike a divert or eject cylinder for a single manual cycle, gloved and without taking eyes off the product stream.
Welding jig clamp release
Install one next to a pneumatic clamp on a welding jig; the operator hits the head to swap the clamp line over, and the automatic return re-selects the home position the moment the hand is withdrawn.
How to choose
If you are weighing this against M5PP21006B, the only real difference is how easy the target is to hit: the PP protruding button suits a deliberate fingertip press, while this mushroom head trades precision for speed and works gloved, no-look or blind-reach. If the state must HOLD after the hand leaves - a clamped fixture or a selected mode - step instead to the manual-restoration M5PL21006B latching valve or an M5HS selector. Stepping to M5PM21008B buys a 1/4in port and 12.0 mm2 (Cv 0.67) for larger cylinders. Respect the published reversal stroke: the spool travels 2.0-3.3 mm and the head 3.8-5.1 mm; driving past the 5.1 mm limit will damage the valve. The control set here is engineering plastic and is rated for hand operation only - never strike it with a mallet or tool.
Frequently asked questions
It is a 5/2-way, external control, direct acting valve operated mechanically by a mushroom head with automatic spring return - no coil and no pilot circuit. Working pressure is 0-1.0 MPa (0-145 psi), proof pressure 1.5 MPa (215 psi), media temperature -20 to +70 C, and the air must be filtered by a 40 um element. The 210 body carries a 1/8in PT port, an effective area of 9.0 mm2 (Cv 0.50) and an aluminium alloy body. Lubrication is not required, but if lubricated air is used, continue with the same medium to optimise valve life.
AirTAC publishes a reversal stroke of 2.0-3.3 mm at the spool and 3.8-5.1 mm at the button. The overtravel beyond full spool movement is absorbed inside the head linkage by design, but pressing past the 5.1 mm limit will damage the valve. Mount it so the palm strike lands square on the head rather than at an angle, and never hammer it with a tool: the PM control set is engineering plastic and is rated for hand operation only.