This is a pneumatic solenoid valve used on AI auto-insertion equipment, the machines that insert axial and radial through-hole components into PCB assemblies. Inside the machine it controls the air path that drives movement at the head, so the insertion cycle depends on it switching at the right moment. We supply it as a like-for-like replacement: the valve goes back into the slot the old unit came out of, and the fittings, tubing and manifold already on the machine stay in place. Most orders come from maintenance teams who need a line running again, and from stores restocking ahead of a planned service.
| Valve make | SMC |
| Valve model | VQZ3221-5L0-C6 |
| Machine part number | N411VQZ3-684 |
| Equipment type | AI auto-insertion equipment |
| Line context | SMT and PCB assembly lines |
| Part category | Replacement solenoid valve |
| Circuit type | Pneumatic control valve |
| Actuation | Solenoid, pneumatic circuit |
| Supplied as | Individual valve unit |
| Mounting | Existing machine position, original fittings reused |
| Order reference | Number stamped on the valve body, cross-checked against the machine spare-parts list |
| Availability | Stock and delivery confirmed against your order |
This valve is supplied for AI auto-insertion equipment and is also fitted on SMT placement lines that use the same valve body. AI equipment and placement machines often carry valves from several solenoid valve manufacturers, and the bodies can look almost identical from the outside, so the number on the valve is what decides the match — not the machine model on its own. Two positions on the same machine can take different valves, and a valve that fits one head may not fit the manifold beside it. Before quoting, we check your machine model, the number from the old valve and a photo, and confirm that the port layout and connector match the unit you are removing. If a direct match is not available, we say so before you commit to the order.
ZJ-SMT supplies Panasonic SMT and PCB assembly equipment and spare parts to manufacturers worldwide. Our range covers pick-and-place machines, axial and radial insertion equipment, solder paste inspection systems, and feeder spare parts, with both new and used options available. We support bulk orders, and machine condition and availability are confirmed with you before ordering. Whether you are expanding a line, replacing a worn feeder part, or sourcing equipment for a new project, send us your model numbers and our team will come back with a suitable solution and quotation.
It is supplied for AI auto-insertion equipment and for SMT placement lines that use the same valve body. Because a single machine model can be built with more than one valve variant, the model name alone is not enough — send us your machine model together with the number stamped on the valve you are removing, and we will confirm the match before you order.
A valve on its way out usually shows up as an air fault rather than an obvious leak. Common signs are an actuator that moves slowly or not at all, air released at the wrong point in the cycle, or an insertion fault that appears at the same position on every run. A hiss near the valve is the clearest signal of all.
Normally no. The valve is a like-for-like replacement, and the manifold, fittings and tubing on the machine are reused. While the valve is out, look at the tubing ends and fittings for hardening, cracks or a loose seat — if anything is damaged, change it in the same job so you are not back inside the machine a week later.
In practice, solenoid valve parts like this one are replaced rather than rebuilt. The seals and the moving parts are what wear out, and a repaired unit rarely lasts as long as a new one in continuous production. Keep the old valve as an emergency spare only if it still switches reliably.
Yes. We quote SMC valves for AI and placement equipment well beyond this model, and we can check valves from other solenoid valve manufacturers when a machine runs a mixed set. Send the machine model and the numbers from the valves you need, and we will come back with what is available for your line.
Compare the replacement against the old unit before you take anything apart — body shape, port layout and connector should match. Fit it, reconnect the tubing in the same order it came off, then test the air function under normal running conditions before the machine goes back into production. As a solenoid valve supplier for SMT and AI equipment, we would rather you check twice than stop the line a second time.
