Vent
To comply with government ordinances and protection of employees from excessive plant noise, PULSCO Vent Silencers can be sized to handle a wide range of valve pressures and flow rates to maintain attenuation of noise level throughout the system flow range to a required decibel criteria. These criteria are at a specified distance from the silencer and are dependent on the design flow rate, temperature and pressure of the system.

The active components of a PULSCO Vent Silencer are the inlet diffuser, plenum section, and acoustic tube module. The Inlet Diffuser provides energy dissipation and modification of the noise spectrum from low to high frequency waves for easier attenuation. It also provides the back pressure required for optimum valve performance and size. The Plenum Section minimizes shell noise radiation and noise leakage. It slows the flow velocity prior to entry into the Acoustic Tube Module. The Acoustic Tube Module, comprised of multiple flow tubes surrounded by acoustic packing, absorbs and attenuates the high frequency acoustic energy as modified by the inlet diffuser.

PULSCO Vent Silencers are typically fitted with a bottom inlet nozzle. Connection location is flexible by using a skirt support and mounting ring, thereby allowing the silencers to be adapted to those special applications which require a side inlet. To provide capacities for a wide range of flows, our standard vent silencers are available in diameters from 12 to 144 inches. Features may include self-supporting bottom inlet, flanged inlet connection, acoustically treated weather hood, lifting lugs, skirt or leg supports for vertical mounting under specified loading conditions, and saddle supports for horizontal mounting. The Silencers can be designed to meet material requirements for temperature and corrosive environments.