Airtac PM Panel Mount Straight Coupling PM8
The AirTAC Airtac PM Panel Mount Straight Coupling PM8 is a genuine bulkhead union for push-in tube connection, rated 0 - 1.0 MPa (0 - 10 kgf/cm2) with a 1.5 MPa proof pressure.
- TypeBulkhead union
- SeriesPM
- Working pressure0 - 1.0 MPa (0 - 10 kgf/cm2)
- Proof pressure1.5 MPa
- Temperature-20 to +70 °C
- 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.
About the Airtac PM Panel Mount Straight Coupling PM8
The PM8 is an AirTAC PM series bulkhead union, a tube-to-tube one-touch fitting that carries a single Dia 8 mm line through a panel or machine wall. Both ends are identical push-in sockets, so you connect the tube inside a cabinet and its continuation outside without threading a made-up assembly through the hole. The fitting is clamped by an M16x1 locknut; that locknut thread is fixed by the Dia 8 size in AirTAC's bulkhead table, and it steps to M20x1 only when you move up to Dia 10.
Push each soft nylon or polyurethane tube home until it bottoms; the POM chuck inside grips the tube wall and the NBR O-ring seals it, and pressing the release collar frees the tube again for rework. This is the resin one-touch profile: 0 to 1.0 MPa working pressure, -750 mmHg (10 Torr) vacuum, 1.5 MPa proof pressure and -20 to +70 C operation. The body arrives grey as standard; the D suffix orders the black version, which on the PM family changes the body colour itself, not just the button.
Airtac PM Panel Mount Straight Coupling PM8 Technical Specifications
| Model | Airtac PM Panel Mount Straight Coupling PM8 |
|---|---|
| Type | Bulkhead union |
| Series | PM |
| Connection | Push-in one-touch |
| Working pressure | 0 - 1.0 MPa (0 - 10 kgf/cm2) |
|---|---|
| Negative pressure | -750 mmHg (10 Torr) |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Applicable tubing | Soft nylon or polyurethane tube |
| Thread standard | PT (Rc tapered) unless the code says otherwise |
POM release button and chuck, aluminium-alloy guide, stainless spring gasket, NBR O-ring; body brass or PBT depending on the part. AirTAC publishes flow as a characteristic curve rather than a single figure, so no L/min value is listed.
Model Code: Airtac PM Panel Mount Straight Coupling PM8
| PM | Bulkhead union. |
|---|---|
| 4 / 6 / 8 / 10 / 12 | Tube outside diameter in mm (3.2 mm exists on the mini series). |
| M5 / 01 / 02 / 03 / 04 | Thread: M5x0.8, 1/8", 1/4", 3/8", 1/2" (M3 on the mini series). |
| D | Black. Blank = grey. |
Fitting & Sealing Notes
- check Cut the tube square and clean before pushing it home, or the seal will leak.
- check Push until it stops, then pull back to check the chuck has gripped.
- check To release, press the collet ring fully in and pull the tube out.
- check Threaded parts arrive with sealant on the thread; M5 sizes use a sealing gasket.
- check Match the tube OD exactly - a 6 mm fitting will not hold 1/4" tube.
Where the Airtac PM Panel Mount Straight Coupling PM8 Is Used
Control cabinet pass-through on packaging machines
A valve manifold lives inside the electrical enclosure on a cartoner, while the vacuum cups and cylinders it drives sit outside. A single PM8 carries the Dia 8 branch line through the cabinet wall on its M16x1 locknut, so the wiring and plumbing stay separated and the cabinet door still closes on clean grommet-free routing.
Machine guard bulkhead on injection moulding auxiliaries
On a granulator or take-off robot mounted behind fixed guarding, the PM8 lets maintenance connect and release the Dia 8 actuator line from the service side of the guard without reaching inside, and the release-collar design means tube changes need no spanner on either face of the panel.
Bottling conveyor air-jet distribution
Under a bottling line deck, a Dia 8 trunk line feeds short drops to air-jet nozzles that knock containers onto the correct lane. Mounting a PM8 at each section joint turns one continuous tube run into removable segments, so a deck section can be lifted out for cleaning without cutting tube.
Is the Airtac PM Panel Mount Straight Coupling PM8 the Right Part?
PM8 sits mid-ladder in the PM range. PM6 serves the smaller pilot and signal lines typical of valve-island tap-offs, while PM10 feeds larger cylinders where the extra bore pays for itself in flow capacity - stepping up or down changes the tube, the grip hardware and the locknut, but the push-in principle is identical. Note that a bulkhead union is the right shape only when the same line continues on both sides of the wall; if you need a threaded outlet on the far side, the PMF bulkhead connector is the part to look at instead.
Match the fitting to the tube, never the other way round: the chuck in the PM8 seals exactly one outside diameter, and a Dia 6 or Dia 10 tube will not seat or hold in a Dia 8 socket. Check both the inside and outside runs before ordering - the most common bulkhead mistake is a mixed pair of tube sizes on the two faces of the same panel.
Quick checklist
- ✓ Tube outside diameter matches exactly
- ✓ Thread size and standard match the port
- ✓ Working pressure within 0 - 1.0 MPa (0 - 10 kgf/cm2)
- ✓ Temperature within -20 to +70 °C
Airtac PM Panel Mount Straight Coupling PM8 FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), vacuum capability down to -750 mmHg (10 Torr), proof pressure 1.5 MPa, and an operating temperature range of -20 to +70 C. The fitting accepts Dia 8 mm soft nylon or polyurethane tube on both ends and is secured through the panel by an M16x1 locknut, the standard locknut thread AirTAC assigns to Dia 8 bulkhead fittings.
No. A one-touch chuck grips and seals exactly one tube outside diameter, so a Dia 6 tube will not seal and can blow out of a Dia 8 socket. Order the PM6 if the whole run is Dia 6, or keep the Dia 8 trunk through the panel and reduce on one side with a PG8-6 different-diameter straight union downstream of the bulkhead.
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