Airtac M5PF Flat Head Push Button Mechanical Valve M5PF21008G
Mechanically actuated · no coil, no pilot airThe AirTAC Airtac M5PF Flat Head Push Button Mechanical Valve M5PF21008G 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.
$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 | M5PF21008G |
|---|---|
| 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 | 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 M5PF21008G
The M5PF21008G is a 5/2-way external control, direct acting valve that is thrown by a finger pressing a flush green button - there is no coil, no wiring and no pilot port, so it runs anywhere electricity is unavailable or unwanted. Because the button sits level with its collar, a bump from a sleeve, a toolbox or a passing part will not switch it; only a deliberate press does.
This is the 200-series single control body with a 1/4in PT port, giving a 12.0 mm2 effective area (Cv 0.67). The sliding-column spool means the changeover is not affected by working pressure - there is no back-pressure effect, so the button feels and switches the same from empty to full line pressure. Spring return snaps the valve back the instant you lift off, and the exhaust sits on top of the body, so a silencer screws straight on. The engineering plastic control set is for manual operation only: never strike it with a tool.
Typical applications
Pneumatic bench fixture cycle start
A machinist starts the clamp-and-drill sequence on a pneumatic jig with one deliberate press. The flush green button cannot be triggered by a forearm or a chip brush sweeping the bench, and spring return leaves the valve vented the moment the hand lifts.
Leak-test rig mode selection
On a pressure-decay test station, the flush profile stops an operator bumping the button mid-test and dumping the part. The green colour marks it as the go control next to red and black buttons on the same 210-body manifold panel.
Panel-mounted function select on a pneumatic press
Fitted into a control panel cutout beside a latching PL valve, the PF gives momentary inching of a small air press while the PL holds jog mode. Both use the same 210 body, so spares and panel drilling stay uniform.
How to choose
If a hand can find the button by feel, this PF is the right pick over the PP protruding button, which invites a casual jab, or the PM mushroom head, which is made to be hit with a palm. If the valve must hold its state after the press, move to the PL latching version instead - the PF is purely spring return. Port choice is sized to the cylinder: step down to 06 (1/8in) for small actuators and get 9.0 mm2 on the same 210 body, or step up only if you are already on 1/4in lines.
Respect the reversal stroke or you will damage the valve: the spool travels 2.0-3.3 mm and the button 3.8-5.1 mm from flush. Never hold the button hard down or push it past full stroke - AirTAC publishes these limits explicitly because overtravel ruins the valve.
Frequently asked questions
It is a 5/2-way external control, direct acting valve with no coil or pilot port, operated by a flush green flat button with automatic spring return. Working pressure is 0-1.0 MPa (0-145 psi), proof pressure 1.5 MPa (215 psi), temperature -20 to +70 C. The port is PT1/4 on the 200-series single control body, with an effective area of 12.0 mm2 (Cv 0.67). Air must be filtered to 40 um, and no lubrication is required - if lubricated air is used, keep the same medium for valve life.
The reversal stroke is a hard limit, not a guide: the spool moves 2.0-3.3 mm and the button surface travels 3.8-5.1 mm from its flush rest position. Pushing beyond full stroke - for example pressing the button hard into the panel or hammering it - overtravels the spool and damages the valve, which is why AirTAC states the figures explicitly. The engineering plastic control set is rated for hand operation only; actuating it with a tool is forbidden.