Airtac M5PL Detent Rotary Push Button Type Mechanical Valve M5PL21008
Mechanically actuated · no coil, no pilot airThe AirTAC Airtac M5PL Detent Rotary Push Button Type Mechanical Valve M5PL21008 is a genuine 5/2-way latching type control valve. Press to latch, twist the button to release. Manual restoration, red only. 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 | M5PL21008 |
|---|---|
| Valve type | 5/2 way, external control, direct acting |
| Actuation | Latching type |
| Reset | Manual restoration - press to latch, turn to release |
| Body series | 200 Series, single control |
| Port size | PT1/4 |
| Effective area | 12.0 mm2 (Cv 0.67) |
| 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 | 5.9-7.2 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 M5PL21008
The M5PL21008 is a 5/2-way mechanically actuated valve - there is no solenoid coil and no pilot port. You press the red latching button to throw the spool, and the valve stays there; you twist the button to release it and let it reset. That manual hold is the whole point of the PL actuator: the state you set is the state the machine keeps until a person deliberately changes it.
This example is the 210-series single-control body with 1/4in PT ports and an effective area of 12.0 mm2 (Cv 0.67), the largest flow in the M5 common-type range. The sliding-column spool means the changeover force is not affected by working pressure, so there is no back-pressure effect and the valve latches and releases the same way 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. Note that the PL control set is engineering plastic and is rated for hand operation only - striking it with a tool is forbidden by the datasheet.
Typical applications
Drilling jig isolation for tool change
An operator presses the latching button to vent and isolate the clamping circuit of a drilling fixture before changing tooling, then twists to re-pressurise. The twist-to-release action stops the jig being restored by an accidental brush against the panel.
Divert gate held on a sorting conveyor
On a packaging line sorting cartons into two lanes, the PL holds a pneumatic divert gate in whichever lane was last selected. Because the spool is spool-valved mechanically, the gate position survives an air dip and only changes when a hand turns the button.
Held clamp on a bench assembly press
At a manual assembly bench, a worker presses the button to latch a hold-down clamp across a workpiece and keeps both hands free for fitting. Twisting the red button releases the clamp only when the assembly step is finished.
How to choose
Choose the PL when the valve must remember: press once, twist to release. If the state only needs to last while a finger stays on it, the spring-return M5PM mushroom head on the same 210 body is the neighbour to compare. If a held state must be selectable between two positions rather than latched and released, the M5HS selector switch is the alternative. Between bodies, this 210 with 1/4in ports moves 12.0 mm2 (Cv 0.67); the M5PL21006 steps down to 1/8in and 9.0 mm2 (Cv 0.50), while the 110 body does not offer a latching option at all. Mind the reversal stroke: the spool travels 2.0-3.3 mm and the button stroke is 5.9-7.2 mm - pressing beyond these published limits damages the valve, so mount it so the button cannot be bottomed out hard.
Frequently asked questions
It is a 5/2-way external-control, direct-acting mechanical valve with a latching button (press to latch, twist to release; red only). Working pressure is 0-1.0 MPa (0-145 psi), proof pressure 1.5 MPa (215 psi), temperature -20 to +70 C. Ports are PT 1/4in on the 210-series body, effective area 12.0 mm2 (Cv 0.67). The body is aluminium alloy and the media is air filtered by a 40 um element. Lubrication is not required, but if lubricated air is used, continue with the same grade - AirTAC suggests ISO VG32.
The published reversal stroke is a spool travel of 2.0-3.3 mm with a button stroke of 5.9-7.2 mm. AirTAC states explicitly that exceeding these limits damages the valve, so design the panel cut-out or guard so the button cannot be driven past full travel. Also note the PL control set is engineering plastic and is for hand operation only - switching it by striking with a tool is forbidden. Control sets can be ordered separately as spares.