Compressors are an important item in many production processes. Undamped roots-type rotary piston blowers and screw compressors generate high noise levels that may exceed 160 dB(A).

Hereby inducing damage into the piping and its adjuncts caused by low-frequency pulsations.

Why pulsations dampeners? 

The pressure generated by the compressor are evened out with a pulsation dampener. Advantages are less periodic plant inspections and increasing the useful lifetime of the plant. In addition, the pulsation dampeners reduce the levels of noise radiated from the piping.

Extended experience 

Over several decades, Q.E.I. built an outstanding reputation for supplying high quality pulsation dampeners. We have a long tradition in custom-built equipment that is designed for the complete satisfaction of the plant user. Q.E.I. demonstrated reliable, qualitative and guaranteed solutions, regardless of the installation complexity. To ensure a competitive pricing our R&D department is always improving our products resulting in more efficient pulsation dampening.

Principles of operations

One or more choke tubes connect through two or more separate expansion chambers in a single housing. This acoustic filter (Helmholtz resonator) is designed such that it attenuates the main frequencies generated by the compressor. Fluctuations in pressure are significantly diminished and can be reduced to a specified residual peak-to-peak pulsation level, if desired. The rotary speed of the compressor and the delivered gas flow determines the number and positioning of the choke-tubes, even when a variable speed compressor is installed.

Custom made dampeners

Demands upon the construction of the pulsation dampeners are high, due to the extremer loadings. When a standard design no longer meets the requirements, Q.E.I. designs a custom-built dampener, which is determined by following complex studies.