Hoffman Specialty® Series 2000 Pressure and/or Temperature Steam Regulator NOISE CONTROL GUIDELINES HS-907
Understanding Sound Sound results from pressure fluctuations in the air. Sound pressure levels cover an enormous range. In order to compress the range, sound levels are usually expressed in decibels. A decibel is simply the logarithm of the ratio of two quantities, the sound pressure level being measured and a reference level. The reference level is by definition 0 dB. The human ear does not respond equally to all frequencies. It tends to be insensitive to very low and very high frequencies.
Steam Component and ESP-PLUS Selection The Hoffman Specialty website Steam Specialty Component Selector and the ESP-PLUS selection program for the Series 2000 Regulators incorporates the Instrument Society of America (ISA) standard to calculate noise level generated at the main valve outlet. If the ESP-PLUS calculated noise level with a full port main valve exceeds your requirements, try using a larger size main valve with a normal port or a reduced port.
Noise Reduction Piping Practices 1. Install the Series 2000 regulator in an accessible location and at least three feet away from any solid walls or structures that could transmit and reflect sound. 2. Use sound isolating piping supports. 3. Use the Saturated Steam Capacity Tables below to properly size the inlet and outlet piping for a velocity appropriate with the application. The velocity of most industrial applications should be less than 10,000 feet per minute.
Noise Attenuating Devices Several noise attenuating devices can be used with pressure regulator valves. Some are mounted to the main valve in the downstream piping.
Installation of Noise Attenuation Devices 1. Before installing the Series 2000 Pressure Reducing Valve, ensure the piping is free from foreign materials, scale, etc. 2. Install the Series 2000 Pressure Reducing Valve in accordance with the instructions included with the valve (HS-601). 3. Connect the acoustic orifice plate, acoustic diffuser or acoustic silencer directly to the outlet connection of the Series 2000 Pressure Reducing Valve to avoid the generation of flanking noise. 4.
Burgess-Manning Acoustic Orifice Plate Model Numbers Table 1 Upstream Pressure (Psig) 5 7 10 12 15 20 25 30 40 50 60 75 90 100 125 150 175 200 225 250 VALVE SIZE 1/2" * 3/4" * 1" * 1-1/4" * 1-1/2" * 2" * 2-1/2" 3" 4" 6" Flow Rate Model # Flow Rate Model # Flow Rate Model # Flow Rate Model # Flow Rate Model # Flow Rate Model # Flow Rate Model # 75 BAP-1/2A-1-I 95 BAP-1/2A-1-I 120 BAP-1/2A-1-I 140 BAP-1/2A-1-I 150 BAP-1/2A-1-I 180 BAP-1/2A-2-I 220 BAP-1/2A-2-I 125 BAP-3/4A-2-I 165 BAP-3/4A-2-I 21
Burgess-Manning Acoustic Diffusers C (flgd) C (NPT) To determine the acoustic diffuser series required: 1. Enter the chart in Table 2 (below) at the row for the steam capacity 2. Match the pressure upstream (inlet pressure) of the valve. 3. With knowledge of the series of acoustic diffuser required, locate the specific model in Table 3 (page 9) based on the characteristics of the specific main valve.
Burgess-Manning Acoustic Diffuser Model/Part Numbers Table 3 Diffuser Model Outlet Size Part # D-1 D-3 D-4 D-5 D-6 D-8 D-10 MAIN VALVE OUTLET SIZE 1/2" NPT 3/4" NPT 1" NPT 1 1/4" NPT 1 1/2" NPT 2" NPT Outlet Size Part # 2"-150# 10-1196-000 2"-150# 10-1150-000 2"-150# 10-1176-000 --------- --------- --------- Outlet Size Part # 2"-300# 10-1818-000 2"-300# 10-1897-000 2"-300# 10-1912-000 --------- --------- --------- Outlet Size Part # 2"-150# 10-2053-000 2"-150# 10-1241-000 2"-
Burgess-Manning Acoustic Diffuser Model/Part Numbers Table 3 (continued) Diffuser Model Outlet Size Part # D-4 D-5 D-6 D-8 D-10 D-12 D-14 D-16 D-18 D-20 D-24 2" 250# 2 1/2" 125# 2 1/2" 250# 3" 125# 3" 250# 4" 125# 4" 250# 6" 125# 6" 250# Outlet Size Part # 4"-150# N/A --------- --------- --------- --------- --------- --------- --------- --------- --------- Outlet Size Part # --------- 4"-300# N/A --------- 4"-300# 10-1593-000 --------- --------- --------- --------- -
Burgess-Manning Acoustic Silencers Selecting an acoustic silencer should be done on a consultative basis working with Burgess-Manning. Burgess-Manning requires the following information: • Steam flow rate (lbs./hr) • Inlet and outlet pressures • Size of the Series 2000 Main Valve • Steam temperature. The following notes are applicable to the acoustic silencers from Burgess-Manning: • The Burgess-Manning silencers are installed directly to the PRV outlet. • All welded steel construction.
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