Airtac M5PM Mushroom Push Button Type Mechanical Valve M5PM21006G
Mechanically actuated · no coil, no pilot airThe AirTAC Airtac M5PM Mushroom Push Button Type Mechanical Valve M5PM21006G 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 | M5PM21006G |
|---|---|
| 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 | 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 | 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 M5PM21006G
The AirTAC M5PM21006G is a 5/2 way, externally controlled, direct acting valve that is thrown by hand - there is no solenoid coil, no pilot port and no wiring at all. Its large green mushroom head is made to be struck with the palm of a hand without the operator needing to look or aim, which is what sets it apart from smaller buttons in the same family. A spring throws the spool back the moment the head is released, so each palm press gives one valve cycle. It sits on the 200 series single-control body with a 1/8in PT port, giving an effective area of 9.0 mm2 (Cv 0.50).
The sliding-column spool means the control force is not affected by working pressure - there is no back-pressure effect, so the head feels the same to operate whether the line is at 0.2 MPa or the full 1.0 MPa. The exhaust outlet is on top of the body, so a silencer screws straight on without re-plumbing. The control set is engineering plastic, which is intended for manual operation only: striking it with a hammer, jig or machine part is forbidden by the datasheet, so reserve this valve for a human hand.
Typical applications
Cycle start on a bench punch press
Mounted on the press frame within easy palm reach, the green mushroom head starts the clamp-and-strike cycle; the spring return means the next cycle needs a fresh deliberate press, never a stuck-on command.
Jog control on a packaging machine sealing head
An operator wearing gloves holds the mushroom head down to inch the sealing head into position for film alignment, then lets go - the valve springs back and the head stops, with no electrical station to wire at the machine.
Manual override at a pneumatic fixture station
Fitted to the fixture manifold of a machining cell, the valve lets a setter vent or pressurise the clamping circuit by hand during setup, and its plastic control set stays untouched by jigs because it is operated only by palm.
How to choose
The usual choice here is between the PM mushroom head and its two button siblings. Pick the PP protruding button when a fingertip press is enough and you want a modest target, the PF flat button when the valve must resist being knocked open by a passing sleeve or dropped part, and this PM mushroom head when the operator should be able to hit it flat-palm in one motion, with gloves on, without looking. If the machine state must stay put after the press, step to the PL latching type (twist to release) instead - this model always springs back.
The 210 body with a 1/8in port gives 9.0 mm2 (Cv 0.50); if the valve feeds a larger cylinder, the same mushroom head on a 1/4in port body (M5PM21008G) lifts the effective area to 12.0 mm2 (Cv 0.67). Observe the reversal stroke limits: spool stroke 2.0-3.3 mm, button stroke 3.8-5.1 mm. Driving the button past these figures damages the valve, so mount it so the palm strike lands within the button travel.
Frequently asked questions
It is a 5/2 way, externally controlled, direct acting mechanical valve with a green mushroom head on the 200 series single-control body. Port: 1/8in PT. Pressure range 0-1.0 MPa (0-145 psi), proof pressure 1.5 MPa (215 psi), temperature -20 to +70 C with air filtered by a 40 um element. Effective area 9.0 mm2 (Cv 0.50). Reversal stroke: 2.0-3.3 mm spool, 3.8-5.1 mm button. Body in aluminium alloy, no lubrication required, spring return, no coil and no pilot port.
Press it no more than 3.8-5.1 mm - that is the published button stroke, with the spool itself moving 2.0-3.3 mm. AirTAC states explicitly that exceeding these limits damages the valve, so mount the head where a palm strike naturally bottoms out within travel rather than driving through it. If you cannot guarantee a controlled strike, the PL latching type takes a slower press-and-twist action instead.