Airtac M5PF Flat Head Push Button Mechanical Valve M5PF21006G
Mechanically actuated · no coil, no pilot airThe AirTAC Airtac M5PF Flat Head Push Button Mechanical Valve M5PF21006G 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 PT1/8 with a 9.0 mm2 (Cv 0.50) effective area.
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Specifications
| Model | M5PF21006G |
|---|---|
| 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 | PT1/8 |
| 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 M5PF21006G
The M5PF21006G is a 5/2-way mechanical control valve with no coil and no pilot port: you change the spool over by pressing the flush green button with a finger or thumb, and a spring throws it back the moment you lift off. Because the actuation is purely mechanical, it belongs on machines and stations where electricity is absent or unwelcome - the whole function is hand pressure on a button.
This is the 210-series single-control body with a PT1/8 port and a 9.0 mm2 effective orifice (Cv 0.50). The flat button sits almost level with its bezel, so a stray elbow, falling offcut or brushing sleeve will not trip it - only a deliberate press does. The sliding-column spool means the changeover force is unaffected by working pressure, so the button feels identical at 0.2 MPa and at 0.8 MPa, and the top-mounted exhaust takes a silencer directly without extra fittings.
Typical applications
Arbor press cycle confirm
On a bench-mounted pneumatic arbor press, the operator presses the flush green button to admit air to the working stroke. The flat profile keeps the start deliberate, and the spring return vents the cylinder the instant the thumb lifts, so a stalled ram cannot stay live.
Guarded clamp release on a drilling fixture
Fit the valve inside a drilling fixture's control pocket so the clamp circuit can only be vented by reaching in and pressing the button on purpose. A flush head that a sleeve or chip cannot brush is exactly the behaviour you want when an early release would drop the workpiece.
Leak-test station momentary charge
In a QC leak-test rig for castings, the technician presses and holds the button to charge the test piece, then releases to dump and vent. Spring return makes the dump automatic, and the top exhaust port accepts a silencer so the bench stays quiet through a full shift of testing.
How to choose
Flat versus protruding versus mushroom is a question of how easy the button should be to find and hit. The PF flush head on this model is the deliberate choice: use it where a wrong press would dump a clamp or start a cycle, and step up to the PP protruding button or PM mushroom head if operators must hit the valve without looking. This valve is spring return - if the state must hold after the press, you need the PL latching type or the HS selector instead.
Body-wise, the 210 series with 1/8 in port gives 9.0 mm2 (Cv 0.50); the same 210 body in 1/4 in raises this to 12.0 mm2 (Cv 0.67) if your cylinder is larger. Mind the reversal stroke: spool travel is 2.0-3.3 mm and button travel 3.8-5.1 mm, and AirTAC states outright that exceeding these limits damages the valve. Note also that the PF control set is engineering plastic and is approved for manual pressing only - striking it with a tool is forbidden.
Frequently asked questions
It is a 5/2-way external control, direct acting valve, mechanically pressed by a flush green flat button with automatic spring return. Port: PT1/8. Effective area: 9.0 mm2 (Cv 0.50). Pressure range: 0-1.0 MPa (0-145 psi). Proof pressure: 1.5 MPa (215 psi). Temperature: -20 to +70 C. Medium is air filtered by a 40 um element, body is aluminium alloy, and lubrication is not required (ISO VG32 if your circuit is already oiled).
The spool stroke is 2.0-3.3 mm and the button stroke is 3.8-5.1 mm; pressing beyond these figures damages the valve. Mount the valve so the operator's finger bottoms out naturally - against the panel or a raised collar - rather than against the button itself, and never let a linkage or cam overtravel onto a flush button. Remember this PF control set is engineering plastic and is rated for hand pressing only; driving it with a tool voids the design intent. Body and panel mounting are both supported, and the exhaust sits on top of the body for a direct silencer.