Airtac M5PM Mushroom Push Button Type Mechanical Valve M5PM21006RG
Mechanically actuated · no coil, no pilot airThe AirTAC Airtac M5PM Mushroom Push Button Type Mechanical Valve M5PM21006RG 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 | M5PM21006RG |
|---|---|
| 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 | Red |
| 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 M5PM21006RG
The AirTAC M5PM21006RG is a 5/2-way external control, direct acting valve that is thrown by hand - a large red mushroom head sits on top and you strike it with a palm, with no coil, no wiring and no pilot port anywhere on the body. It is a mechanical valve, not a solenoid: the 210-series body redirects a 9.0 mm2 (Cv 0.50) air path the instant the head is depressed, and a spring snaps the spool back the moment your palm lifts, so every press starts a fresh cycle.
Because the spool is a sliding column, the control force does not change with working pressure - there is no back-pressure effect, so the changeover feels and behaves the same at 0.2 MPa as it does at the full 1.0 MPa. The exhaust outlet is on top of the aluminium body, so a silencer screws straight in without re-plumbing, and the G (BSPP) parallel ports suit international fittings on 1/8 in lines.
Typical applications
Bench assembly fixture cycle start
On an assembly bench where an operator clamps a bracket into a drill jig, a palm strike on the mushroom head fires the clamp cylinder and the spring return vents it on release - no electrical cabinet needed at the workstation.
Packaging machine carton eject
Mounted at a panel on a carton-sealing machine, the red head gives the packer a deliberate, easy-to-find palm button to trigger the eject cylinder between cartons, with the cycle ending automatically as the spring resets the spool.
Pneumatic logic step advance
In a purely pneumatic sequence on a small press or feeding unit, the PM valve acts as a hand-initiated step in the circuit, and its top-mounted exhaust takes a silencer directly so the station stays quiet without extra pipework.
How to choose
Mushroom head (PM), protruding button (PP) and flat button (PF) share the same spring-return 210 body, so the choice is purely about how easy the valve should be to hit: the PM's large head is struck with a palm without looking, PP suits a deliberate finger press, and PF sits flush to resist accidental operation. If the machine must hold its state instead of spring back, step to the PL latching type on the same body.
The 210 body here flows 9.0 mm2 (Cv 0.50) at 1/8 in; the smaller 110 body drops to 8.0 mm2, and stepping the 210 to a 1/4 in port raises it to 12.0 mm2 (Cv 0.67) - size the port to the cylinder being switched. Note the PM head is an engineering plastic control set rated for manual operation only: switching it by striking with a tool is forbidden by AirTAC. Watch the reversal stroke - spool 2.0-3.3 mm, button travel 3.8-5.1 mm. Pressing past these limits damages the valve, so mount it so a palm strike cannot bottom out the head.
Frequently asked questions
It is a 5/2-way external control, direct acting valve operated by a red mushroom head, with G1/8 ports on the 210-series body. Working pressure is 0-1.0 MPa (0-145 psi) with a proof pressure of 1.5 MPa (215 psi), temperature range -20 to +70 C, and an effective orifice of 9.0 mm2 (Cv 0.50). The body is aluminium alloy, the medium is air filtered by a 40 um element, and lubrication is not required - though if lubricated air is used, keep the same medium for best valve life.
The spool needs 2.0-3.3 mm of travel to change over, while the button itself moves 3.8-5.1 mm - those are the published reversal stroke limits, and AirTAC states explicitly that exceeding them damages the valve. Mount the valve so a full palm strike cannot drive the head beyond its travel, and remember the head is a manual-operation control set: never strike it with a hammer or tool.