AirTAC 4A330C-10 Pneumatic Valve, 4A300 Series (4A330C10)
The AirTAC AirTAC 4A330C-10 Pneumatic Valve, 4A300 Series (4A330C10) is a genuine 5/3-way 5/3 double air pilot — closed centre air pilot valve with PT3/8 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 21.3 mm² effective area (Cv 1.25).
- Valve type5/3-way
- ActuationAir pilot
- Port sizePT3/8
- Effective area21.3 mm²
- Flow (Cv)1.25
- 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 4A330C-10 Pneumatic Valve, 4A300 Series (4A330C10)
The AirTAC 4A330C10 is a 5/3-way double air pilot valve with a closed centre. A pulse of compressed air on either pilot port throws the spool, and at centre all five ports are blocked, so a double-acting cylinder stops dead and holds its position mid-stroke until the next signal arrives. Nothing electrical is involved: the valve is thrown purely by pilot air from a hand, foot or signal valve, which is why it keeps working in dust, vibration and solvent-laden air where a coil type would struggle. Body flow is the published 21.3 mm2 (Cv 1.25) with a 3 cycle/sec no-load frequency.
This SKU carries 3/8 in PT (Rc tapered) work ports that seal on the flanks with PTFE tape; the exhaust is 1/4 in, one size below the inlet and outlet. The 505 g aluminium-alloy body runs on 0.15-0.8 MPa filtered through a 40 um element, covers -20 to +70 C, and is sized for cylinders of roughly Dia 50-80 mm. It is a genuine AirTAC 4A300-series valve built on the sliding-column spool principle.
AirTAC 4A330C-10 Pneumatic Valve, 4A300 Series (4A330C10) Technical Specifications
| Model | AirTAC 4A330C-10 Pneumatic Valve, 4A300 Series (4A330C10) |
|---|---|
| Series | 4A300 air pilot valve (sliding-spool type) |
| Valve type | 5/3-way |
| Function | 5/3 double air pilot — Closed centre |
| Actuation | Double air pilot, spring-centred (exterior air control) |
| Port size | PT3/8 |
| Exhaust port | PT1/4 |
| Thread standard | PT (Rc tapered) |
| Effective area (Cv) | 21.3 mm² (Cv 1.25) |
| 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 | 3 cycle/sec (no load) |
| Temperature | -20 to +70 °C |
| Body material | Aluminum alloy |
| Lubrication | Not required |
| Weight | 505 g |
Specifications follow the official AirTAC 4A series datasheet. AirTAC publishes the effective area / Cv published for 4A330C-10; 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 | 21.3 mm² |
|---|---|
| Flow coefficient | Cv 1.25 |
| 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 4A330C-10 Pneumatic Valve, 4A300 Series (4A330C10)
| 4A | Air pilot valve, sliding-spool, 4-series. |
|---|---|
| 3 | Body size (4A300) — sets port & flow. |
| 30C | Function: 10 = single pilot 5/2, 20 = double pilot 5/2, 30C/E/P = 5/3 closed / exhaust / pressure centre. |
| 10 | 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 4A330C-10 Pneumatic Valve, 4A300 Series (4A330C10) Is Used
Quarry screen dump gates
A hand-lever signal valve on the operator platform throws the 4A330C10, feeding a Dia 63 mm gate cylinder on a vibrating screen deck; the closed centre parks the gate mid-travel for choke-feeding, with no electronics to shake loose on the deck.
Solvent-booth clamp fixtures
In a paint or coating booth the Cv 1.25 flow suits a Dia 50-80 mm clamp cylinder, and because the valve contains no electrical parts at all it needs no ignition-source certification in flammable vapour.
Sawmill log pusher arms
Driven by a foot or limit signal valve beside the saw line, the 3/8 in PT ports feed a pusher cylinder through sawdust-heavy air; the centre-hold position keeps the arm steady during blade changes and setting work.
Is the AirTAC 4A330C-10 Pneumatic Valve, 4A300 Series (4A330C10) the Right Valve?
The closed-centre 5/3 gives up some flow to the 5/2 in this series: 21.3 mm2 (Cv 1.25) and 3 cycles/sec no-load against 28.0 mm2 (Cv 1.65) and 4 cycles/sec, so keep duty cycles realistic on longer strokes. If your cylinder is lighter and you can drop the mid-stroke hold, step DOWN to the 4A200 body (Cv 1.0); if the actuator is larger, step UP to the 4A400 (Cv 2.82). Choose 30C over 30E or 30P when the actuator must park exactly where it stopped - and remember that for a suspended load a pilot-operated check valve at the cylinder ports is still the right backup, not this valve alone. An air pilot pays for itself where electrics are a liability: no coil to burn out, no ignition-risk certification, no cabinet needed at the machine. Mount one on a 300M base (up to 12 stations, 3/8 in common inlet) to build a bank. Replacing an existing unit? Match all four points: 4A300 body, function 30C, port 10 (3/8 in, 1/4 in exhaust), PT thread.
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 4A330C-10 Pneumatic Valve, 4A300 Series (4A330C10) FAQ
Effective area 21.3 mm2 (Cv 1.25), max frequency 3 cycles/sec no-load, operating pressure 0.15-0.8 MPa (21-114 psi) with a 1.2 MPa (175 psi) proof pressure, temperature -20 to +70 C, air filtered by a 40 um element. The body weighs 505 g and suits cylinders of roughly Dia 50-80 mm.
Compressed air only - a short pilot signal from a separate 3/2 or 5/2 valve, hand lever or limit valve moves the spool, and with a closed centre the cylinder holds where it stopped. The 3/8 in PT (Rc tapered) ports seal on the thread flanks, so wrap PTFE tape rather than relying on a face washer; the exhaust is 1/4 in.
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 4A330C-10 Pneumatic Valve, 4A300 Series (4A330C10)
Send us the quantity, thread standard and destination. We confirm price, stock and lead time — usually within 7-8 hours.