AirTAC 4A320-08 Pneumatic Valve, 4A300 Series (4A32008)
The AirTAC AirTAC 4A320-08 Pneumatic Valve, 4A300 Series (4A32008) is a genuine 5/2-way double air pilot (memory) air pilot valve with PT1/4 ports. It is a sliding-spool valve switched by a compressed-air signal instead of a coil, and it directs air to double-acting cylinders and actuators. The 4A300 body is published at 28.0 mm² effective area (Cv 1.65).
- Valve type5/2-way
- ActuationAir pilot
- Port sizePT1/4
- Effective area28.0 mm²
- Flow (Cv)1.65
- Series4A300
- 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 4A320-08 Pneumatic Valve, 4A300 Series (4A32008)
The 4A32008 is the double air pilot 5/2 valve of the AirTAC 4A300 sliding-column body: a compressed-air signal, not an electric coil, does the switching. A short pulse to one pilot port throws the spool, a pulse to the other throws it back, and because there is no return spring the spool simply stays where it was last pulsed - held by land friction and balanced pressure alone. No magnet, no detent, no latch: the valve keeps its last position even if the pilot supply is lost, and a held signal is never needed.
It directs air to double-acting cylinders and actuators in the ~ Dia 50-80 mm class, with a published effective area of 28.0 mm2 (Cv 1.65) and a no-load ceiling of 4 cycles/sec. The 1/4in PT ports are Rc tapered, so they seal on the thread flanks - wrap PTFE tape and tighten, no face washer required. The body weighs 365 g and runs on air filtered by a 40 um element at 0.15-0.8 MPa.
AirTAC 4A320-08 Pneumatic Valve, 4A300 Series (4A32008) Technical Specifications
| Model | AirTAC 4A320-08 Pneumatic Valve, 4A300 Series (4A32008) |
|---|---|
| Series | 4A300 air pilot valve (sliding-spool type) |
| Valve type | 5/2-way |
| Function | Double air pilot (memory) |
| Actuation | Double air pilot, detent-free memory (exterior air control) |
| Port size | PT1/4 |
| Exhaust port | PT1/4 |
| Thread standard | PT (Rc tapered) |
| Effective area (Cv) | 28.0 mm² (Cv 1.65) |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 0.8 MPa (21 – 114 psi) |
| Proof pressure | 1.2 MPa (175 psi) |
| Max frequency | 4 cycle/sec (no load) |
| Temperature | -20 to +70 °C |
| Body material | Aluminum alloy |
| Lubrication | Not required |
| Weight | 365 g |
Specifications follow the official AirTAC 4A series datasheet. AirTAC publishes the effective area / Cv published for the 3/8" port; other port and centre options of this body share the same casting but are not separately rated. Max frequency is the no-load figure. Confirm the thread standard (PT / G / NPT) against the product label before piping.
Flow & Piloting
| Effective area | 28.0 mm² |
|---|---|
| Flow coefficient | Cv 1.65 |
| Control signal | Compressed air (exterior pilot) |
| Pilot ports | Two pilot ports, one per side |
| Electrical parts | None — no coil, no wiring, no IP rating needed |
| Manifold base | 300M (up to 12 stations) |
Because there is nothing electrical in the valve, the 4A suits wash-down, explosive-atmosphere and high-vibration areas where a solenoid would need certification. Size the valve so effective area / Cv is not the bottleneck for your bore and speed; the 5/3 centre versions have a smaller effective area than the 5/2 of the same body.
Model Code: AirTAC 4A320-08 Pneumatic Valve, 4A300 Series (4A32008)
| 4A | Air pilot valve, sliding-spool, 4-series. |
|---|---|
| 3 | Body size (4A300) — sets port & flow. |
| 20 | Function: 10 = single pilot 5/2, 20 = double pilot 5/2, 30C/E/P = 5/3 closed / exhaust / pressure centre. |
| 08 | Port size: M5 / 06=1/8" / 08=1/4" / 10=3/8" / 15=1/2". |
| (blank) | Thread standard: blank = PT, G = BSPP, T = NPT. This model is PT (Rc tapered). |
Related: 4A310 (single pilot), 4A320 (double pilot, memory), 4A330C/E/P (5/3 centre).
Where the AirTAC 4A320-08 Pneumatic Valve, 4A300 Series (4A32008) Is Used
Powder-coat booth door and clamp cylinders
Inside a powder booth, any electrical part is a spark-risk question. The all-air 4A32008 has no coil at all, and its 28.0 mm2 (Cv 1.65) capacity comfortably cycles a Dia 63 mm clamp cylinder - pulse it from a hand signal valve mounted outside the booth.
Sawmill log stops and dust gates
Fine wood dust coats and kills solenoid coils; a sliding-column air spool barely notices it. Pulse the 4A32008 from a mechanical limit valve at the end of the log conveyor and the memory spool holds the gate position until the next pulse.
Bottling-line stopper gates in wash-down zones
Between filler and capper, stopper gates get hosed down daily. With nothing electrical to keep IP-rated, the valve mounts right on the conveyor frame, and its 4 cycle/sec no-load rate keeps up with typical indexing of Dia 50-80 mm gate actuators.
Is the AirTAC 4A320-08 Pneumatic Valve, 4A300 Series (4A32008) the Right Valve?
Size both ways before committing: if Cv 1.65 is more flow than your circuit needs, the 4A200 body (Cv 1.0) does the job for less; if your cylinders grow past Dia 80 mm or cycle speed matters, step up to the 4A400 (Cv 2.82). Pick this double-pilot memory version over a single-pilot 4A310 whenever your signal valve only gives a pulse - a hand lever, a foot pedal, a limit valve at the end of a stroke - rather than a signal that must be held.
An air pilot earns its place wherever electrics are a liability: there is no coil to burn out, nothing to certify in an explosive or dusty atmosphere, and wash-down or vibration cause it no trouble, so it can sit on the machine far from a control cabinet fed by a single signal line. Mount one valve inline, or bank up to 12 on a 300M manifold base with a 3/8in common inlet. Replacing an existing unit? Match four things: body size 4A300, function 20, port 08 (1/4in), thread PT.
Quick checklist
- ✓ Required flow (Cv) for cylinder & speed
- ✓ Function: single / double / 5-3 centre
- ✓ Pilot air available at 0.15 MPa or above
- ✓ Port thread (M5 / 1/8 / 1/4 / 3/8 / 1/2)
- ✓ Single valve or 300M manifold base?
Installation & Piloting Notes
- check Use clean air filtered to 40µm or finer.
- check Keep the main line within 0.15 – 0.8 MPa.
- check Drive the pilot port from a 3/2 or 5/2 signal valve.
- check A pulse is enough — the spool stays where it was last driven.
- check Fit silencers or fittings to the exhaust ports.
- check Once run on lubricated air, keep lubricating it.
AirTAC 4A320-08 Pneumatic Valve, 4A300 Series (4A32008) FAQ
It is a 5/2 valve for double-acting cylinders and actuators, sized around Dia 50-80 mm bores. Published figures: effective area 28.0 mm2 (Cv 1.65), maximum frequency 4 cycles/sec (no load), operating pressure 0.15-0.8 MPa (21-114 psi), proof pressure 1.2 MPa (175 psi), temperature -20 to +70 C, air filtered by a 40 um element, and lubrication is not required. The body weighs 365 g with 1/4in PT work ports.
Yes. There is no return spring, so once pulsed the spool stays where it was, held by land friction and balanced pressure - not by a magnet, detent or latch, none of which exist in this valve. Note that this is positional memory, not a guaranteed safety brake: for suspended or fall-risk loads, add a pilot-operated check valve at the cylinder ports or a mechanical brake rather than relying on the valve alone.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC 4A Valves & Bases
Request a Quote for AirTAC 4A320-08 Pneumatic Valve, 4A300 Series (4A32008)
Send us the quantity, thread standard and destination. We confirm price, stock and lead time — usually within 7-8 hours.