Airtac M5PF Flat Head Push Button Mechanical Valve M5PF21008R
Mechanically actuated · no coil, no pilot airThe AirTAC Airtac M5PF Flat Head Push Button Mechanical Valve M5PF21008R is a genuine 5/2-way flat button type control valve. A flush button, hard to operate by accident. 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.
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Specifications
| Model | M5PF21008R |
|---|---|
| Valve type | 5/2 way, external control, direct acting |
| Actuation | Flat button 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 M5PF21008R
AirTAC M5PF21008R is a 5/2-way mechanical control valve: an external-control, direct-acting spool valve with no coil and no pilot port. A flush, red flat button set level with the surface is what throws the spool, and a spring returns it automatically the moment you lift off. There is no electrical specification to quote because there is nothing electrical about it - the valve is operated by a fingertip or palm press and nothing else.
This is a 210-series single-control body with 1/4in PT ports and a 12.0 mm2 effective orifice (Cv 0.67). The sliding-column spool means the force needed to change over does not rise with working pressure, so the button feels the same at 0.2 MPa as it does at 1.0 MPa. Both exhaust outlets sit on top of the body, so a silencer screws straight on without re-plumbing the installation.
Typical applications
Packaging machine start station
A flush red start button on a carton-sealing machine, where operators lean past it with trolleys and stacked boxes - the flat face cannot be knocked into a start by a passing sleeve or carton edge.
Fixture clamp release on a drill jig
Press to vent a pneumatic clamp circuit on a machining jig and the spring resets the valve the instant you lift off, so every cycle begins from a known clamped state with no operator habit to rely on.
Air-only reset logic in a spray booth
A reset point in a purely pneumatic sequencing circuit inside a paint booth, where no electrical enclosure is wanted - the valve needs no wiring, no coil and no supply except the air already in the line.
How to choose
Choose this flat button over the M5PP protruding button when the valve sits where elbows, trolleys or passing parts can bump it: the flush face gives nothing to catch. If the state must hold after pressing, step to the M5PL latching version instead - the PF always springs back. Within the 210 body, 1/8in ports flow 9.0 mm2 while this 1/4in port flows 12.0 mm2 (Cv 0.67), so take this port when the cylinder needs the extra area; the 110 body tops out at 8.0 mm2 and suits tighter panels. Do not exceed the published reversal stroke - 2.0-3.3 mm at the spool, 3.8-5.1 mm at the button - or you will damage the valve.
Frequently asked questions
It is a 5/2-way, external-control, direct-acting valve with a 1/4in PT port and a 12.0 mm2 effective area (Cv 0.67). Operating pressure is 0-1.0 MPa (0-145 psi), proof pressure is 1.5 MPa (215 psi), and media temperature is -20 to +70 C for air filtered to 40 um. The body is aluminium alloy and lubrication is not required, though lubricated air should be kept consistent once introduced.
AirTAC publishes a spool stroke of 2.0-3.3 mm and a button stroke of 3.8-5.1 mm for this model. Exceeding these limits damages the valve, so the button is built to be pressed firmly, not struck. Note that the PF uses an engineering plastic control set and is for manual operation only - switching it by hitting it with a tool is forbidden by the datasheet. Matching control sets are available separately as spares.