Airtac M5PL Detent Rotary Push Button Type Mechanical Valve M5PL21008G
Mechanically actuated · no coil, no pilot airThe AirTAC Airtac M5PL Detent Rotary Push Button Type Mechanical Valve M5PL21008G 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 | M5PL21008G |
|---|---|
| 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) |
| 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 | 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 M5PL21008G
The M5PL21008G is a 5/2-way external control, direct acting valve operated entirely by hand: no solenoid coil, no pilot port, no wiring. Press the green button once and the valve latches into its new position; twist the same button and it releases. That manual restoration is what sets PL apart from every spring-return button in this family - the state you set is the state that holds. It sits on the 200-series single-control body with 1/4in PT ports and a 12.0 mm2 effective orifice (Cv 0.67).
Because the spool is a sliding-column construction, the changeover is not affected by working pressure, so there is no back-pressure effect and the button feels consistent across the whole 0-1.0 MPa range. The exhaust outlet sits on top of the body, so a silencer screws straight on and keeps the station quiet. Body and panel mounting are both supported, and the control set can be ordered separately as a spare. This control set is engineering plastic and is for manual operation only - striking it with a tool is forbidden.
Typical applications
Jig isolation for tool change on a machining cell
Mount the M5PL21008G at the fixture on a CNC milling cell. Before an insert change, the setter presses the green button to latch the clamping circuit to its safe position; the state holds with hands free for the swap, and a twist releases it only once the guard is closed and the setter confirms the jig.
Shift-end hold on a packaging conveyor diverter
On a snack-food packaging line, the latching valve holds a conveyor diverter in its diverted position across a shift change without anyone holding a button or a relay remembering the state. At restart, a twist of the button returns the diverter under the operator's explicit control.
Hold state on a pneumatic pressure-test rig
On a bench rig leak-testing cast aluminium housings, the operator presses PL to latch the fill-and-hold circuit while the gauge is watched over the dwell period. Because the valve is direct acting with no coil, the test station stays purely pneumatic and can sit anywhere on the bench without an electrical supply.
How to choose
Choose PL over PP, PF or PM when the switched state must persist: a spring-return button reverts the instant you lift off, while PL holds until deliberately twisted, and the twist-to-release action prevents accidental reset. The green button suits a normal-run state; red marks a stop or isolate state. The colour code exists only on the 210 body - an M5PL110 model carries no colour suffix at all. On flow, step from the 06 port (1/8in, Cv 0.50) to this 08 port (1/4in, Cv 0.67) when the downstream cylinder needs the larger effective area. Respect the reversal stroke: the spool moves 2.0-3.3 mm and the button travels 5.9-7.2 mm. Driving it past those limits damages the valve, so operate it by hand and never with a bar or mallet.
Frequently asked questions
It is a 5/2-way external control, direct acting valve with a green latching button that holds on press and releases on twist. Pressure range is 0-1.0 MPa (0-145 psi) with a proof pressure of 1.5 MPa (215 psi), and it runs on filtered air from -20 to +70 C. Ports are PT1/4 on the 200-series single-control aluminium body, with a 12.0 mm2 effective orifice (Cv 0.67). Lubrication is not required, though if lubricated air is used, continue with the same medium - ISO VG32 or equivalent.
The published reversal stroke is 2.0-3.3 mm at the spool and 5.9-7.2 mm at the button. Exceeding these figures damages the valve - AirTAC states this explicitly. The PL control set is engineering plastic and is rated for manual operation only, so never strike it with a tool or machine part. For anything tripped mechanically by passing equipment, use the roller versions M5R (both directions) or M5L (one direction) instead.