Airtac M5PM Mushroom Push Button Type Mechanical Valve M5PM21006R
Mechanically actuated · no coil, no pilot airThe AirTAC Airtac M5PM Mushroom Push Button Type Mechanical Valve M5PM21006R 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 | M5PM21006R |
|---|---|
| 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 | 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 M5PM21006R
The AirTAC M5PM21006R is a 5/2-way external control, direct acting valve that is thrown by hand: a large mushroom head is struck with the palm of a glove, no looking required. There is no coil and no pilot port - this is not a solenoid valve, so it keeps working where electricity is unavailable, unwanted or unsafe. It sits on the 200-series single control body with PT1/8 ports and an effective area of 9.0 mm2 (Cv 0.50). The red mushroom head is a spring-return design: release your palm and the spool snaps back automatically, so the valve can be wired into a cycle where the momentary press is the whole point.
The sliding-spool construction means the changeover force is not affected by working pressure, so the head feels the same to hit at 0.2 MPa as it does at 1.0 MPa. The exhaust outlet sits on top of the body, so a silencer screws straight on without adapters or re-plumbing. The control set is engineering plastic and rated for manual operation only - striking it with a hammer or tool is explicitly forbidden by AirTAC - and spare control sets can be ordered separately if a head wears out in service.
Typical applications
Case-taper palm start on a packaging line
An operator at the infeed of a carton sealing station palms the mushroom head to kick off the taping cycle. The spring return resets the valve the instant the hand lifts, so every box gets exactly one initiated stroke.
Bench fixture clamp release
Mounted at the edge of a machine-shop jig table, the large red head lets a gloved hand vent the clamping circuit after a part is machined - no electrical cabinet, no control wiring, just pneumatic supply and a palm press.
Dock leveller lower control
Fitted to the control panel of a pneumatically raised dock leveller, the mushroom head drops the platform when the driver presses it, and the spring return leaves the valve neutral once the palm is off - a failsafe posture with zero electrics involved.
How to choose
If your operator wears gloves and needs to hit the valve in one motion without aiming, the mushroom head (PM) is the right call; the PP protruding button is a smaller target for a fingertip, and the PF flat button sits flush to resist accidental operation on a crowded panel. If the machine must remember its state after the operator walks away, you want a manual-restoration type instead - the Y lever, the HS selector or the PL latching button all hold position until a person changes them. For flow, this 210 body with a 1/8 inch port gives 9.0 mm2 (Cv 0.50); stepping up to the M5PM21008 with a 1/4 inch port raises that to 12.0 mm2 (Cv 0.67) for a larger cylinder, while the 110 body (M5PM11006) is the compact alternative at 8.0 mm2. Mind the published reversal limits: the spool stroke is 2.0-3.3 mm and the mushroom button stroke is 3.8-5.1 mm. Hitting the head harder than that damages the valve - AirTAC says so explicitly - so mount it where an over-enthusiastic palm cannot bottom the button out.
Frequently asked questions
It is a 5/2-way external control, direct acting valve with a mushroom head actuator and automatic spring return. Operating pressure is 0-1.0 MPa (0-145 psi), proof pressure 1.5 MPa (215 psi), and temperature range -20 to +70 C. Ports are PT1/8 on the 200-series body, effective area 9.0 mm2 (Cv 0.50), body in aluminium alloy, media is air filtered by a 40 um element. No coil, no pilot port - the spool is moved entirely by the palm-operated head.
The valve is damaged - AirTAC states this explicitly. The published reversal limits for the M5PM21006R are a spool stroke of 2.0-3.3 mm and a button (actuator) stroke of 3.8-5.1 mm. Because the spool completes its travel after only about 3.3 mm, the remaining button travel is a safety margin, not reserve power. Mount the valve so the palm strike cannot over-travel the head, and never drive the plastic control set with a tool.