Airtac PAL Plastic Silencer PAL04D
The AirTAC Airtac PAL Plastic Silencer PAL04D is a genuine plastic silencer that cuts exhaust noise by 25 dB at 0.5 MPa using a polyethylene-fibre filter in a POM body.
- TypePlastic silencer
- SeriesPAL
- Working pressure0 - 1.0 MPa (0 - 10 kgf/cm2)
- Proof pressure1.5 MPa
- Noise reduction25 dB
- 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 PAL Plastic Silencer PAL04D
Every stroke of a directional valve fires a pulse of compressed air out of its exhaust port, and that pulse is what you hear as a sharp crack on each cycle. A silencer screws onto the port and breaks the pulse up before it reaches the room. The PAL04D does this with a polyethylene-fibre filter element held in a POM body, and it is rated at 25 dB of noise reduction at 0.5 MPa - the higher of AirTAC's two published silencer figures.
This is the largest size in the PAL ladder and the D suffix means both the top cover and the body moulded in black rather than the standard natural colour. The connection is a 1/2in PT male thread, so it screws straight onto the exhaust port of a large solenoid valve or onto a manifold exhaust plate. Nothing metal touches the air path, which suits clean and corrosive-air surroundings alike.
Airtac PAL Plastic Silencer PAL04D Technical Specifications
| Model | Airtac PAL Plastic Silencer PAL04D |
|---|---|
| Type | Plastic silencer |
| Series | PAL |
| Noise reduction | 25 dB at 0.5 MPa |
| Element | Polyethylene-fibre filter in a pom body |
| 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 |
| 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 PAL Plastic Silencer PAL04D
| PAL | Plastic silencer. |
|---|---|
| 01 / 02 / 03 / 04 | Thread: 1/8", 1/4", 3/8", 1/2". M5 where the series offers it. |
| D | Black. Blank = grey. |
Choosing a Silencer
- check Sintered-brass types (BSL / BSLM / BESL) give 13 dB and take rough treatment.
- check Resin types (PAL / PALM / PPA) give 25 dB and weigh far less.
- check PPA plugs straight into a tube instead of a thread, and is copper-free for sensitive processes.
- check BESL adds an adjustable throttle, so it silences AND sets exhaust speed in one part.
- check An undersized or clogged silencer shows up as a slow return stroke - size it to the valve's exhaust port.
Where the Airtac PAL Plastic Silencer PAL04D Is Used
Large valve manifold exhausts
A 1/2in PT thread matches the exhaust plate of big solenoid valve islands on bottling and cartoning machines, so one PAL04D quiets the whole bank instead of a patchwork of adapters.
Laboratory test rigs
Polyethylene fibre in a POM housing cuts 25 dB from each cycle on bench rigs and fume-cabinet actuators, with no metal surfaces to shed particles near instruments.
Workplace noise-limit retrofits
Bringing a press or palletiser under a site noise limit usually starts at the exhaust ports; at 0.5 MPa this black resin silencer removes 25 dB from the loudest repeated event on the line.
Is the Airtac PAL Plastic Silencer PAL04D the Right Part?
PAL04D is the top of the PAL range: 01 (1/8in), 02 (1/4in), 03 (3/8in) and 04 (1/2in) are all that exist, so the only step down from this SKU is PAL03. Stepping to PAL03 suits smaller valve ports but leaves less filter face for the same exhaust pulse, and an undersized silencer throttles the exhaust and drags out cylinder return times - so size to the valve's exhaust port rather than down. If you need M5 or a mini body, PAL is the wrong ladder: the PALM mini series stops at 1/4in.
Choose resin over metal on sound first: PAL's fibre element delivers 25 dB where AirTAC's sintered-brass BSL series manages 13 dB at the same 0.5 MPa test pressure. Metal earns its place where the part will be knocked by trolleys or run in hot, oily air, because POM and polyethylene fibre are the softer choice. And if the valve exhaust is a push-in tube stub rather than a thread, the plug-in PPA series takes Dia 6 to 12 mm tube instead.
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
- ✓ Noise target: 13 dB metal or 25 dB resin
Airtac PAL Plastic Silencer PAL04D FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), negative pressure down to -750 mmHg (10 Torr), proof pressure 1.5 MPa, and an operating temperature range of -20 to +70 C. The connection is a 1/2in PT male thread, and the noise reduction figure is 25 dB measured at 0.5 MPa.
The D suffix gives PAL04D a black top cover and body in the same POM material as the standard version - the colour does not change the mechanical rating. POM is a tough engineering plastic, but if the silencer sits where trolleys strike it or in hot oily air, the sintered-brass BSL04 is the more forgiving part, at the cost of 13 dB instead of 25 dB.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard parts are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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