Airtac M5PM Mushroom Push Button Type Mechanical Valve M5PM21008R
Mechanically actuated · no coil, no pilot airThe AirTAC Airtac M5PM Mushroom Push Button Type Mechanical Valve M5PM21008R 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 PT1/4 with a 12.0 mm2 (Cv 0.67) effective area.
$30.93 $35.38Save 12%- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
Specifications
| Model | M5PM21008R |
|---|---|
| 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 | PT1/4 |
| Effective area | 12.0 mm2 (Cv 0.67) |
| 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 M5PM21008R
The M5PM21008R is a 5/2-way external control, direct acting valve that is thrown by hand - a palm pressed on its large red mushroom head - and not by a solenoid coil or an air pilot signal. There is no coil to wire and no pilot port to plumb, which is exactly why it fits manual start stations and areas where electrical hardware is unwanted. Releasing the head lets the internal spring snap the spool back, so the valve is automatic-return: the output state exists only while the button is held. The 210 body carries a PT1/4 port and a 12.0 mm2 (Cv 0.67) effective orifice, the largest flow rating in the M5 common-type range.
Inside, a sliding-column spool means the changeover force is not affected by working pressure - there is no back-pressure effect, so the head feels the same to press at 0.2 MPa as at 0.8 MPa. The exhaust outlet sits on top of the body, so a silencer screws straight on and noise at the station is easy to tame. The PM control set is engineering plastic and is intended for hand operation only; striking it with a tool is forbidden. Body and panel mounting are both supported, and replacement control sets can be ordered as spares.
Typical applications
Punch press cycle start
An operator presses the red head with an open palm to start a single stamping cycle on a small press; spring return drops the signal the moment the hand lifts, so every stroke needs a fresh deliberate press.
Fixture clamp on a manual milling setup
Panel-mounted beside a jig, the valve holds the clamp cylinder on while the operator keeps the head depressed and releases it to unclamp, with no electrical interlock anywhere in the circuit.
Conveyor divert gate override
Fitted next to a divert gate on a bottling line, the mushroom head gives staff a manual override that still works during a control-power outage, because the valve needs nothing but a hand to switch.
How to choose
The choice around PM is how easy the valve should be to hit. The PP protruding button presents a smaller target, the PF flat button resists accidental operation, and the PL latching button holds its position until twisted - pick PM when an operator should find the head without looking and the function is momentary. On flow, this 210 body with a PT1/4 port gives 12.0 mm2 (Cv 0.67); stepping down to the 1/8 in port on the same body drops to 9.0 mm2 (Cv 0.50), and the smaller 110 body gives 8.0 mm2 (Cv 0.45). Size the port to the cylinder, and respect the reversal stroke: the spool travels 2.0-3.3 mm and the button 3.8-5.1 mm - pressing past these limits damages the valve.
Frequently asked questions
It is a 5/2-way external control, direct acting valve with a PT1/4 port and a 12.0 mm2 (Cv 0.67) effective area. Working pressure is 0-1.0 MPa (0-145 psi), proof pressure 1.5 MPa (215 psi) and temperature -20 to +70 C, running on filtered air passed through a 40 um element. The aluminium alloy body accepts body or panel mounting, and lubrication is not required.
AirTAC publishes a reversal stroke of 2.0-3.3 mm for the spool and 3.8-5.1 mm for the button on this model. These are limits, not adjustments: driving the head past them damages the valve. Operate it with a palm or finger - the engineering plastic control set is for manual operation only, and striking it with a tool is expressly forbidden.