Product Description

SU5 4″ Absorptive Blower Silencers

The SU5 series is the highest grade standard annular flow absorptive silencer. They are well suited for inlet service on small rotary positive displacement blowers (where discharge P < 15 psig) or the discharge of vacuum pumps.

The high length to diameter ratio provides better noise attenuation for high frequency noise sources. The U5 and SU5 series have similar attenuation characteristics:

SU5 Blower Silencer attenuation curve

This 4″ blower silencer is constructed from mild steel, with enamel paint. The design consists of two concentric perforated cylinders lined with acoustical pack, forming an annular flow path. This design features full blocked-line-of-sight, while providing full flow area for low resistance.

Maximum flow: 1305 CFM
Maximum Temperature: 325 °F
Housing Diameter (ID): 10″
Connections: 4″ Flanged 125#/150# ANSI
Overall Length: 21.5″
Weight: 30 lbs
These blower silencers can be shipped via UPS.

Please note the SU5-4 is not a stocked item. Contact us for current lead times.

Absorptive Blower Silencers

The absorptive type silencer is the classic dissipative design, deriving its noise control properties from the basic fact that noise energy is effectively “absorbed” by various types of fibrous packing materials. More technically, as sound waves pass through the spaces between the tightly-packed small diameter fibers of the absorptive material, the resulting viscous friction dissipates the sound energy as small amounts of heat.

Absorptive silencers are very effective on high frequency noise (500-8,000 Hz). At frequencies above and below this range, attenuation performance progressively diminishes.

Since noise is absorbed by the packing media, absorptive silencers do not rely on internal baffles, tubes or other restrictive devices to achieve noise reduction. Consequently, absorptive silencers generally employ “straight-through” or similar internal designs which impose very little air flow restriction.

SU5 4″ Absorptive Blower Silencer

BOM Number: 14-104-AA SKU: 22203 Category:


This model is currently experiencing long lead times from the factory. Please contact us if you need to confirm inventory prior to ordering.
Shipping Weight: 30 lbs
Shipping Dimensions: 22 × 10 × 10 in

Universal Silencer

Connection Type:


Connection Size:

4" Flanged

Silencer Type:


Max Flow:

1305 CFM