Blower Silencer Comparison

To select the right silencer for your pressure or vacuum application, the two important criteria are the silencer type and the silencer size.  While the most common models for our customer applications are the RIS inlet silencers and SD discharge silencers, there are quite a range of silencers available to meet your specific application need.  This page covers the series of blower silencer available:

RIS Inlet Silencers

Series: RIS, RISY, RISH
Type: Chamber-Absorptive
Placement: Inlet
Sizes: 2″-30″
Configurations: End In/End Out, Low Side Outlet, High Side Outlet
Connections: 2″-3.5″ MPT, 6″-30″ 125#/150# ANSI drilled flanges, 4″-5″ have both options
Usage: Critical PLV applications

Note: The RIS and SD series are exactly the same, except the RIS is used at the inlet with the airflow exiting through the packed end, and the SD is used at the discharge with the airflow entering through the packed end.

SD Discharge Silencers

Series: SD, SDY, SDS, SHD
Type: Chamber-Absorptive
Placement: Discharge
Sizes: 2″-30″
Configurations: End In/End Out, Low Side Outlet, High Side Outlet, Opposed
Connections: 2″-3.5″ MPT, 6″-30″ 125#/150# ANSI drilled flanges, 4″-5″ have both options
Usage: Critical PLV applications; used for all but the most demanding applications which may require the RD series

Note: The RIS and SD series are exactly the same, except the RIS is used at the inlet with the airflow exiting through the packed end, and the SD is used at the discharge with the airflow entering through the packed end.

RD Discharge Silencers

Series: RD, RDY, RDH, RDS
Type: Chamber-Absorptive
Placement: Discharge
Sizes: 2″-30″
Configurations: End In/End Out, Low Side Outlet, High Side Outlet, Opposed
Connections: 2″-3.5″ MPT, 6″-30″ 125#/150# ANSI drilled flanges, 4″-5″ have both options
Usage: Critical PLV applications; the ultimate level of pulse control and noise attenuation for the most demanding applications

UCI Inlet Silencers

Series: UCI, UCIY, UCIH
Type: Chamber
Placement: Inlet
Sizes: 8″-30″
Configurations: End In/End Out, Side
Connections: 125#/150# ANSI drilled flanges
Usage: Sub-critical PLV applications

UCD Discharge Silencers

Series: UCD, UCDY
Type: Chamber
Placement: Discharge
Sizes: 8″-30″
Configurations: End In/End Out, Low Side Inlet
Connections: 125#/150# ANSI drilled flanges
Usage: Sub-critical PLV applications; slightly higher performance than the URD series below.

URB & URD Discharge Silencers

Series: URB, URD, URBY, URDY, URDH, URDS
Type: Chamber
Placement: URB Inlet or Discharge, URD Discharge
Sizes: URB 1″-6″, URD 8″-30″
Configurations: End In/End Out, Low Side Inlet, High Side Inlet, Opposed
Connections: 2″-3.5″ MPT, 6″-30″ 125#/150# ANSI drilled flanges, 4″-5″ have both options
Usage: Sub-critical PLV applications; slightly lower performance than the UCD series above.

SURS Multi-Use Silencers

Series: SURS, SURSY
Type: Chamber
Placement: Inlet or Discharge
Sizes: 2″-20″
Configurations: End In/End Out, Low Side Inlet
Connections: 2″-3.5″ MPT, 4″ and larger have 125#/150# ANSI drilled flanges
Usage: For blowers running above critical transition speed. Operates at pressures to 15 psi.

SU5
SU4
SU3

SU Annular Flow Absorptive Silencer

Series: SU5, SU4, SU3
Type: Absorptive
Placement: Inlet or Discharge
Sizes: 4″-20″
Configurations: End In/End Out
Connections: 125#/150# ANSI drilled flanges
Usage: High-speed, low-pressure applications

The SU5 series is the highest grade standard absorptive silencer. The SU4 series has slightly lower attenuation than the SU5. The SU3 series is the most economical with slightly lower attenuation than the SU4.

U5 Straight-Through Absorptive Silencer

Series: U5
Type: Absorptive
Placement: Inlet or Discharge
Sizes: 1/2″-6″
Configurations: End In/End Out
Connections: 1/2″-4″ female NPT, 5″-6″ 125#/150# ANSI drilled flanges
Usage: High frequency noise sources

 

U2 Straight-Through Absorptive Silencer

Series: U2
Type: Absorptive
Placement: Inlet or Discharge
Sizes: 5″-30″
Configurations: End In/End Out
Connections: 125#/150# ANSI drilled flanges
Usage: High frequency noise sources; less attenuation but more economical than the U5 series above.

 


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