Products
Acoustic Diffusers

Series S, Acoustic Diffuser is an accessory for HD Main Valve to see more accessory options please visit the HD Accessories Section.

Acoustic Diffusers - Series S

The Series S Acoustic Diffuser incorporates a single tube with a drilled orifice pattern which reduces downstream turbulence. Noise reduction levels of 10-15 dBA can typically be achieved.

ModelInlet Pipe SizeInlet TypeOutlet Pipe SizeOutlet Type
S1-1217-NPT1501/2"NPT2"150#RFSO
S1-1217-NPT3001/2"NPT2"300#RFSO
S1-1317-NPT1503/4"NPT2"150#RFSO
S1-1317-NPT3003/4"NPT2"300#RFSO
S1-1417-NPT1501"NPT2"150#RFSO
S1-1417-NPT3001"NPT2"300#RFSO
S3-1217-NPT1501/2"NPT2"150#RFSO
S3-1217-NPT3001/2"NPT2"300#RFSO
S3-1317-NPT1503/4"NPT2"150#RFSO
S3-1317-NPT3003/4"NPT2"300#RFSO
S3-1417-NPT1501"NPT2"150#RFSO
S3-1417-NPT3001"NPT2"300#RFSO
S4-1320-NPT1503/4"NPT4"150#RFSO
S4-1320-NPT3003/4"NPT4"300#RFSO
S4-1420-NPT1501"NPT4"150#RFSO
S4-1420-NPT3001"NPT4"300#RFSO
S4-1520-NPT1501 1/4"NPT4"150#RFSO
S4-1520-NPT3001 1/4"NPT4"300#RFSO
S4-1620-NPT1501 1/2"NPT4"150#RFSO
S4-1620-NPT3001 1/2"NPT4"300#RFSO
S4-1720-NPT1502"NPT4"150#RFSO
S4-1720-NPT3002"NPT4"300#RFSO
S5-1320-NPT1503/4"NPT4"150#RFSO
S5-1320-NPT3003/4"NPT4"300#RFSO
S5-1420-NPT1501"NPT4"150#RFSO
S5-1420-NPT3001"NPT4"300#RFSO
S5-1520-NPT1501 1/4"NPT4"150#RFSO
S5-1520-NPT3001 1/4"NPT4"300#RFSO
S5-1620-NPT1501 1/2"NPT4"150#RFSO
S5-1620-NPT3001 1/2"NPT4"300#RFSO
S5-1720-NPT1502"NPT4"150#RFSO
S5-1720-NPT3002"NPT4"300#RFSO
S5-1820-1501502 1/2"150#RFSO4"150#RFSO
S5-1820-3003002 1/2"300#RFSO4"300#RFSO
S6-1522-NPT1501 1/4"NPT6"150#RFSO
S6-1522-NPT3001 1/4"NPT6"300#RFSO
S6-1622-NPT1501 1/2"NPT6"150#RFSO
S6-1622-NPT3001 1/2"NPT6"300#RFSO
S6-1722-NPT1502"NPT6"150#RFSO
S6-1722-NPT3002"NPT6"300#RFSO
S6-1822-1501502 1/2"150#RFSO6"150#RFSO
S6-1822-3003002 1/2"300#RFSO6"300#RFSO
S6-1922-1501503"150#RFSO6"150#RFSO
S6-1922-3003003"300#RFSO6"300#RFSO
S8-1623-NPT1501 1/2"NPT8"150#RFSO
S8-1623-NPT3001 1/2"NPT8"300#RFSO
S8-1723-NPT1502"NPT8"150#RFSO
S8-1723-NPT3002"NPT8"300#RFSO
S8-1823-1501502 1/2"150#RFSO8"150#RFSO
S8-1823-3003002 1/2"300#RFSO8"300#RFSO
S8-1923-1501503"150#RFSO8"150#RFSO
S8-1923-3003003"300#RFSO8"300#RFSO
S8-2023-1501504"150#RFSO8"150#RFSO
S8-2023-3003004"300#RFSO8"300#RFSO
S10-1725-NPT1502"NPT12"150#RFSO
S10-1725-NPT3002"NPT12"300#RFSO
S10-1825-1501502 1/2"150#RFSO12"150#RFSO
S10-1825-3003002 1/2"300#RFSO12"300#RFSO
S10-1925-1501503"150#RFSO12"150#RFSO
S10-1925-3003003"300#RFSO12"300#RFSO
S10-2025-1501504"150#RFSO12"150#RFSO
S10-2025-3003004"300#RFSO12"300#RFSO
S10-2225-1501506"150#RFSO12"150#RFSO
S10-2225-3003006"300#RFSO12"300#RFSO
S12-1825-1501502 1/2"150#RFSO12"150#RFSO
S12-1825-3003002 1/2"300#RFSO12"300#RFSO
S12-1925-1501503"150#RFSO12"150#RFSO
S12-1925-3003003"300#RFSO12"300#RFSO
S12-2025-1501504"150#RFSO12"150#RFSO
S12-2025-3003004"300#RFSO12"300#RFSO
S12-2225-1501506"150#RFSO12"150#RFSO
S12-2225-3003006"300#RFSO12"300#RFSO
S14-1925-1501503"150#RFSO12"150#RFSO
S14-1925-3003003"300#RFSO12"300#RFSO
S14-2025-1501504"150#RFSO12"150#RFSO
S14-2025-3003004"300#RFSO12"300#RFSO
S14-2225-1501506"150#RFSO12"150#RFSO
S14-2225-3003006"300#RFSO12"300#RFSO
S16-2026-1501504"150#RFSO16"150#RFSO
S16-2026-3003004"300#RFSO16"300#RFSO
S16-2226-1501506"150#RFSO16"150#RFSO
S16-2226-3003006"300#RFSO16"300#RFSO
S18-2026-1501504"150#RFSO16"150#RFSO
S18-2026-3003004"300#RFSO16"300#RFSO
S18-2226-1501506"150#RFSO16"150#RFSO
S18-2226-3003006"300#RFSO16"300#RFSO
S20-2227-1501506"150#RFSO20"150#RFSO
S20-2227-3003006"300#RFSO20"300#RFSO
S20-2327-1501508"150#RFSO20"150#RFSO
S20-2327-3003008"300#RFSO20"300#RFSO
S24-2227-1501506"150#RFSO20"150#RFSO
S24-2227-3003006"300#RFSO20"300#RFSO
Downloads
Catalog Spec Sheet (pdf)
Product Overview
The Series-S Acoustic Diffuser incorporates a single tube with a drilled orifice pattern which reduces downstream turbulence. Noise reduction levels of 10-15 dBA can typically be achieved.
Selection / Sizing / Capacities
Dimension and Weights



Note: 1) 150# & 300# flanged available. 2) Other sizes available; consult factory.