AirTAC 4A230C-08 Pneumatic Valve, 4A200 Series (4A230C08)
The AirTAC AirTAC 4A230C-08 Pneumatic Valve, 4A200 Series (4A230C08) is a genuine 5/3-way 5/3 double air pilot — closed centre 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 4A200 body is published at 13.6 mm² effective area (Cv 0.8).
- Valve type5/3-way
- ActuationAir pilot
- Port sizePT1/4
- Effective area13.6 mm²
- Flow (Cv)0.8
- Series4A200
- 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 4A230C-08 Pneumatic Valve, 4A200 Series (4A230C08)
The AirTAC 4A230C08 is a 5/3-way air pilot valve that sends compressed air to both sides of a double-acting cylinder or actuator and holds it exactly where it sits in the middle position - all five ports are blocked at centre, so the piston will not creep. It is thrown by a pulse of clean air on either of the two pilot ports, never by a coil, which is why it fits paint booths, dusty sawmills and wash-down zones where electronics fail.
On the 08 body the work ports are 1/4 in PT (Rc tapered) and seal on the flanks, so wrap PTFE tape on the fittings; the exhaust ports run 1/8 in, one size smaller. Flow capacity is 13.6 mm2 effective area (Cv 0.8) with a no-load switching rate up to 3 cycles per second, suited to cylinders of roughly Dia 32-50 mm. The spool valve weighs 365 g in its aluminum-alloy body and needs air filtered to 40 um.
AirTAC 4A230C-08 Pneumatic Valve, 4A200 Series (4A230C08) Technical Specifications
| Model | AirTAC 4A230C-08 Pneumatic Valve, 4A200 Series (4A230C08) |
|---|---|
| Series | 4A200 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 | PT1/4 |
| Exhaust port | PT1/8 |
| Thread standard | PT (Rc tapered) |
| Effective area (Cv) | 13.6 mm² (Cv 0.8) |
| 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 | 365 g |
Specifications follow the official AirTAC 4A series datasheet. AirTAC publishes the effective area / Cv published for 4A230C-08; 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 | 13.6 mm² |
|---|---|
| Flow coefficient | Cv 0.8 |
| 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 | 200M (up to 16 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 4A230C-08 Pneumatic Valve, 4A200 Series (4A230C08)
| 4A | Air pilot valve, sliding-spool, 4-series. |
|---|---|
| 2 | Body size (4A200) — sets port & flow. |
| 30C | 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: 4A210 (single pilot), 4A220 (double pilot, memory), 4A230C/E/P (5/3 centre).
Where the AirTAC 4A230C-08 Pneumatic Valve, 4A200 Series (4A230C08) Is Used
Paint booth clamp fixtures
Fixture clamps on a spray line stay locked mid-stroke whenever the operator pauses, because the closed centre blocks all five ports. The all-air pilot removes any ignition-risk electrics from the booth, and Cv 0.8 is ample for Dia 32-50 mm clamp cylinders.
Quarry screen gate positioning
A limit or hand signal valve mounted beside the gate pulses the 4A230C08 to raise, hold or lower the screen deck gate. The 3 cycle/sec no-load rate is far beyond manual gate use, and the dust-proof valve body needs only 40 um filtered air.
Food line conveyor stop gates
Wash-down diverters and stop gates on packaging conveyors hold their position at centre even with the pilot line vented, and the PT tapered 1/4 in ports take standard taped fittings. No coil means no water path into electronics on a hosed-down line.
Is the AirTAC 4A230C-08 Pneumatic Valve, 4A200 Series (4A230C08) the Right Valve?
Sizing both directions: step down to the 4A100 body if your cylinder draws less than Cv 0.6, or step up to the 4A300 body (Cv 1.65) for larger bores or longer lines. Within this code, pick 4A230C08 over a 4A220 only when you genuinely need the mid-position - a closed centre parks and holds a double-acting cylinder; if you want it to float or stay pressurised instead, look at the 30E or 30P variant of the same body. Choose this air pilot over a solenoid valve when there is no safe power source at the machine, when vibration or wash-down would kill a coil, or in atmospheres where electrical certification is a headache.
Ordering a replacement is a four-point match: body size 4A200, function 30C, port 08 (1/4 in), thread PT. Single valves mount individually, or bolt several onto a 200M manifold base (up to 16 stations, 1/4 in common inlet) to build an integrated bank from one supply.
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 200M 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 4A230C-08 Pneumatic Valve, 4A200 Series (4A230C08) FAQ
It switches double-acting cylinders or actuators of roughly Dia 32-50 mm. Published figures: effective area 13.6 mm2, flow capacity Cv 0.8, maximum no-load frequency 3 cycles per second, operating pressure 0.15-0.8 MPa (21-114 psi), proof pressure 1.2 MPa (175 psi), and a working temperature of -20 to +70 C. Note the 1/4 in work ports exhaust through 1/8 in openings, so keep silencers free-flowing.
A short air pulse at one pilot port shifts the spool to that end position; it stays there with no signal held. In the centre both pilot signals are off and all five ports are blocked, so a double-acting cylinder stops and holds its position - for guaranteed holding of a suspended load, add a pilot-operated check valve or mechanical brake at the cylinder rather than relying on the valve alone. Feed the pilots from any 3/2 or 5/2 signal valve within the same 0.15-0.8 MPa supply, and order replacements by the four-point code: 4A200 body, function 30C, 1/4 in port, PT thread.
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