Castair SA100 — Air Intake Noise Silencer
The Castair SA100 is an air intake noise silencer designed to reduce the induction noise that reciprocating piston compressors generate during operation. If your compressor is running near a customer waiting area, office space, or any environment where noise is a concern, the SA100 threads directly onto the pump's air intake port and significantly reduces the characteristic intake roar that comes with every piston stroke.
Compressor intake noise is distinct from mechanical noise — it is the rapid air pulse created by the intake valve snapping open on every suction stroke. Without a silencer, that pulse radiates directly into the surrounding space. The SA100 uses internal acoustic baffling to absorb and diffuse that pulsing airflow before it becomes audible noise, with no restriction to intake airflow capacity when the filter element is clean and properly maintained.
How Intake Silencers Work
Every piston compressor draws in a sharp burst of air on each intake stroke. On a two-cylinder pump running at 900 RPM, that's roughly 900 intake pulses per minute — enough to generate a continuous, audible drone in the 100–500 Hz range that carries through walls and shop floors. The SA100 uses a combination of acoustic damping material and internal baffling to absorb that pulse energy before it exits the intake. The result is a measurably quieter compressor with no impact on performance.
Key Features
- Direct Intake Mount: Threads directly onto the compressor pump's intake port — standard NPT threading for Cast Air pump intake configurations
- Acoustic Noise Reduction: Internal baffling dampens intake pulse noise on each compression stroke
- No Performance Penalty: Designed to allow full intake airflow — does not restrict pump output when filter element is clean
- Cast Air OEM Part: Sized and threaded to match Castair pump intake port specifications
- Serviceable: Internal filter element can be inspected and replaced — maintain airflow by keeping the element clean
- Single-Unit Purchase: One silencer for one pump intake; for C2 or C3 pump configurations with two intakes, see SA100x2M or SA100x4M
Technical Specifications
- Part Number: SA100
- Type: Compressor intake noise silencer / intake filter-silencer
- Quantity: 1 unit (single)
- Thread: NPT — confirm your pump's intake port size before ordering
- Manufacturer: Cast Air (Castair)
- Price: 18.58
Note: Thread size and port diameter specifications — call 866-217-0063 to confirm the correct fit for your specific Cast Air pump model before ordering.
Available Configurations — Silencer Options by Pump Type
- SA100 — Single silencer, unmounted. One intake port. C1 single-cylinder or basic applications (18.58)
- SA100M (C1) — Single silencer, factory mounted for C1 pump configuration (44.95)
- SA100x2M (C2, C3) — Two-pack, mounted. For C2/C3 two-intake pump configurations (89.99)
- SA100x4M — Four-pack, mounted. For multi-compressor facilities or duplex units (,030.92)
When Does a Shop Need the SA100
The SA100 is the right choice when:
- Your compressor is located near customer-facing areas, offices, or quiet workspaces where intake noise causes complaints
- Your shop is in an enclosed building where compressor noise echoes and accumulates
- You are replacing a worn or clogged original intake silencer on an existing Castair pump
- You are adding a silencer to a pump that was installed without one
Step up to the SA100x2M when: Your pump has two intake ports (C2 or C3 configuration) and needs silencers on both intakes for complete noise reduction.
Consider the SA100x4M when: You are outfitting multiple compressor stations simultaneously or maintaining a facility-level fleet of Cast Air machines.
Why Buy From Air Compressor Factory Direct?
- Authorized Cast Air dealer since 1991 — we can confirm compatibility with your specific pump model before you order
- Free shipping on qualifying orders
- Free technical support at 866-217-0063 — call if you are unsure whether the SA100 fits your intake port
- Full manufacturer warranty on every Cast Air accessory
Call 866-217-0063 for quick answers and help!
