Our model range

Silencer design is constrained by the flow conditions and the overall performance required.   Ventx design each silencer to reduce the noise level to the required sound pressure level specified by the customer.

Ventx Industrial Silencers have a basic design principle that enables us to supply the best solution for the customer.

The following are the types of units available:

Silencer Configuration

The Flow Rate of the gas determines the diameter of the silencer so that the gas can safely pass through without eroding the acoustical packing or regenerating noise. The silencer length is governed by the degree of noise reduction to be achieved.

 A Ventx Silencers uses a combination of diffuser design and an absorptive core section. The gas and noise enters the silencer through a multi-hole diffuser where it is permitted to expand through many holes into the expansion chamber.
The diffuser also provides a frequency shift to higher frequencies, which are best attenuated by the absorptive section. The gas then passes through this absorptive section, which consists of perforated flow passages surrounded by dense long strand fiberglass acoustical packing providing a broad range of attenuation in the mid to high frequency ranges.

Vent Silencer Design

A vent silencer is a device used to reduce unwanted noise created by gas or steam flow in a pipeline discharging directly into the atmosphere. This noise can be generated due to the high velocity flow through the valve and turbulence created around any obstacle in the line that suddenly restricts or changes the direction of flow such as valve or an orifice device.

Vent silencers find wide applications in high pressure vents, steam vents, safety relief valve outlets, system blow downs, purge and flare outlets.  The generated noise is a function of upstream pressure and temperature, type of gas, the valve size and type, plus the effect of down stream piping.

Ventx design each silencer to attenuate the noise level to the required sound pressure level specified by the customer.

In-Line Silencers

An in-line silencer employs the same principle of acoustic design as a vent silencer. A main consideration with in-line noise is to reduce the vibration caused by the valve noise, as noise is basically air born vibration.

There are two types of silencer for in-line applications;

• Control Valve Silencers are designed to provide a pressure drop or back pressure and are primarily used in conjunction with a control valve. The attenuation is achieved with a combination of diffuser design and an absorptive section.

• Direct In-Line Silencers are designed to produce as little pressure loss as possible, but achieve the required attenuation using only an absorptive section.

Ventx can manufacture both types of In-Line silencer for use in pressurized systems and to a suitable pressure design code.  There are a number of variations with In-Line silencers, and we can design and supply just Diffuser Silencers or Insert Silencers to suit your application.

Ventx silencers are also designed to provide a required back pressure, which can help when selecting a valve and this is why our silencer inlets are always designed and manufactured with reference to a design code.